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中文
Table of Content
24 April 1984, Volume 5 Issue 2
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Articles
STUDIES ON THERMAL STABILITIES OF COORDINATION COMPOUNDS BY GAS CHROMATOGRAPHY (Ⅶ)--THERMAL DECOMPOSITION OF Ni(Ⅱ), Co(Ⅱ) OXALATO COORDINATION COMPOUNDS AND CATALYTIC PROPERTY OF THEIR PRODUCTS
Wang Xin, Xin Xinquan, Dai Anbang(Tai An-Pang)
1984, 5(2): 141-146.
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On the basis of gas chromatographic experimental results we here report the hydrogenation reactions of COand CO
2
which took place when Ni (Ⅱ), Co (Ⅱ) oxalato coordination compounds decomposed in hydrogen. The catalytic activity of solid products of thermal decomposition of CoC
2
O
4
and NiC
2
O
4
was determined by the hydrogenation of CO
2
,which decreased rapidly because of the sintering of the metal catalysts. Some decomposition products, such as K
2
Oand K
2
CO
3
, could disperse metal Co or Ni and prevent the metal catalysts from aggregating. For CoC
2
O
4
/Al
2
O
3
and K
2
CCo(C
2
O
4
)
2
]/Al
2
O
3
, the metal-support interaction made it difficult to reduce Co(Ⅱ) and their decomposition curves were somewhat similar to that of Al
2
(C
2
O
4
)
3
at lower temperatures. The infrared spectrum of K
2
[Co(C
2
O
4
)
2
]/Al
2
O
3
implied that a surface coordination compound was formed.
A CALORIMETRIC SYSTEM FOR THE INVESTIGATION OF METAL-HYDROGEN REACTION
Shen Panwen, Wang Genshi, Song Deying, Lu Shuqin, Zhou Zuoxing, Wang fuyuan
1984, 5(2): 147-152.
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Using a heat conducting type automatic calorimeter made by Sichuan University as a basic element, we have constructed a new calorimetric vessel for the determination of heat effects of gas-solid interface reactions. The calorimeter was coupled with a set of gas-solid equilibration apparatus and heat constants of the system were caliberated by galvano-metric methods. The experimental equipments and manipulation procedures are described, and the accuracy of the measuring technique by peak height and envelopment area hase been found to within 0.5-1%. The system has been used for the determination of the relative partial molar enthalpies of the absorption of H
3
by LaNi
5
, and the results are in good agreement with that cited in the literature
[2]
. It is believed that this calorimetric system can be used for the investigation of heat effects of reaction between intermetallic compounds and hydrogen.
STUDIES ON RARE EARTH METAL-HYDROBORON COMPOUNDS (Ⅰ)--SYNTHESES AND PROPERTIES OF BENZOYLHYDRA- ZINE CHELATES OF RARE EARTH METAL(Ⅲ) DODECAHYDRODODECABORATES
Zhang Lun, Hu Peizhi, Qian Chunhua, Zhang Guomin
1984, 5(2): 153-157.
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In this paper, the benzoylhydrazine chelates of rare earth metal(Ⅲ) dodecahydrododecaborates have been synthesised by the reactions between LnCl
3
and C(CH
3
)
4
N]
2
B
12
H
12
in the presence of benzoylhydrazine (BH) in aqueous medium. These compounds have been examined by elemental analysis, IRspectra and electro-conductance measurements. They have the following formulae [Ln(BH)
4
]
2
(B
12
H
12
)
3
(Ln = La,Pr, Nd, Sm, Eu, Gd, Tb,Ho,Er,Tm,Yb).
THE MACHANISM OF FORMATION OF ZEOLITE A
Ma Sujie, Liu Kongfan, Cui Meizhen, Chen Zhen, Wang Wenli, Xu Ruren
1984, 5(2): 158-162.
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In the system of 3Na
2
O·Al
2
O
3
·2SiO
2
·185H
2
O,in which water glass was taken as a sourse of SiO
2
, The changes in concentrations, of SiO
2
and Al
2
O
3
in the liquid phase of gel and amounts of the lower polysilicate anions with various polymerization degrees presented in the liquid and solid phases of gel during the crystallzation of zeolitse Awere investigated by the chemical analysis and the trimethylsilylation followed by gas ch-romatographic analysis (TMS-GC) respectively. The nucleation of zeolite Ain the liquid phase of gel was obseveed by electron microscope. According to these results, a mechanism of the formation of zeolite Awas proposed.
SPECTROPHOTOMETRIC STUDY ON THE SYSTEM OF URANIUM-CHROMAZUROL S IN THE PRESENCE OF AMPHOTERIC-NONIONIC MIXED SURFACTANT
Shi Huiming, Zhang Guizhu, Li Jinhe
1984, 5(2): 163-168.
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A simple, selective and highly sensitive procedure for spectropho-tometric determination of uranium has been developed. In pH 6.0-8.5, uranium reacts with chromazurol Sand amphoteric-nonionic mixed surfactant to form a blue complex, which has absorption maxima at 615 nm. The molar absorptivity at 615 nm is 1.1-1.2×10
5
. The composition of the complex is established as U: CAS = 1:1 by the methed of job and the equilibrium shift. Beer's law is obeyed for 0-50 μg/25 ml of uranium. The complex is very steady,that could allow the presence of masking agents in a great amounts. Thus, a great majority of metal ions do not disturb the determination of uranium.In this paper, the formation conditions of the complex was studied, it was also researched to enchance sensitization mechamism using mixed surfactant. In this work CyDTA-Tar mixed masking agent was adopted and a minute amount of uranium in ores containing high-thorium, high-rare earths and high-zirconium, respectively, has been determined without separation.
PERIODATE ION ELECTRODE BASED ON QUATERNARY AMMONIUM SITES
Yu Ruqin, Feng Taping, Huang Weiwen, Guo Zhengyuan
1984, 5(2): 169-174.
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A number of long-chain quaternary ammonium sites have been compared as the positively charged sites for construction of periodate ion electrodes, among them PVCelectrodes based on hexadecyltrioctylam-monium periodate showed best performance characteristics. The Nerstian response range of the electrode is from 1×10
-1
down to 6.3×10
-8
Mwith an optimal working pH 2.5-7,5 and a detection limit of 1×10
-8
M. In a periodate solution there exist a rather complicated equilibrium of various species of I(Ⅶ). On the basis of analysis of the pH-EMFgraph (Fig.2) it has been postulated that among various I(Ⅶ) species IO
4
-
is the primary ion form that the electrode responses to. The acid dissociation constants K
1
and K
2
of H
5
IO
6
have been determined potentiometrically using this postulate, the values found (K
1
=5.7×10
-4
;K
2
= 1.97 ×10
-7
) being in good agreement with those reported in literature. The poten-tiometric selectivity coefficients of various co-existing ions have been determined.
INVESTIGATION OF POLAROGRAPHIC CATALYTIC WAVES OF COBALT AND NICKEL-NIOXIME COMPLEXES
An Jingru, Zhang Qing
1984, 5(2): 175-180.
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Cobalt and nickel give sensitive adsorption catalytic waves in the system of NaOH-Nioxime-NH
4
Cl-NaNO
2
. The height of the catalytic waves is directly proportional to the concentration of Co and Ni in the range of 0.025-2 ppb and 1-100 ppb respectively.The detection limit is 0.02 ppb for Co, 0.33 ppb for Ni. Various conditions and mechanism of catalytic waves of Co and Ni in this system have been studied in detail. An analytic method of consecutive determination of trace Co and Ni was proposed.
THE EFFECT OF ALKALI AND ALKALI EARTH CHLORIDE CARRIERS UPON THE SPECTROCHEMICAL ANALYSIS OF RARE EARTHS
Chen Fengxiang, Wang Zimo
1984, 5(2): 181-186.
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The effect of the addition of alkali and alkali earth chloride carriers on the emission of rare earth has been investigated. The results show that addition of carriers causes the total number of rare earth atoms increased in plasma. This is due to the rates of evaporation increased and the residence time in the plasma prolonged. Therefore, the spectral intensities of rare earths are greatly enhanced. The incremental effect of the carriers on the intensities of the rare earth atom lines is greater than that of the rare earth ion lines, since the rare earth ionization percentage is decreased with the addition of the carriers.
STUDY OF THE PHOSPHOR (N)YL HYDRAZIDES AS FUNGICIDES
Chen Ruyu, Ren Sifang
1984, 5(2): 187-192.
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In an attempt to find out new fungicides against wheat rust, a series of compounds of the general formula I have been synthesized by two methods, A and B.
THE MOLECULAR COMPLEXATION BETWEEN SOME C
8
AROMATICS AND SULFOLANE
Liu Lan, Chen Wufeng, Chen Mingzhi, Zheng Guokang
1984, 5(2): 193-198.
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The methods of gas-liquid chromatography and volume change on mixing have been applied to study molecular complexation between some C
8
aromatics and sulfolane. The equilibrium constants of complexes of the aromatic with sulfolane have been measured by both reference stationary phase method and mixed stationary phase method. The volume change on mixing for binary systems of sulfolane with five C
8
aromatics especially for the system of sulfolane with styrene, are all negative. The volume effect of binary systems of propylene carbonate with C
8
aromatics are also contracted but the extent of contraction are far lower than the former.
ENUMERATION OF ISOMERS OF SUBSTITUTED CYCLOALKANES AND HOMOLOGES OF CYCLOALKANES
Wang Jianji
1984, 5(2): 199-204.
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In this paper, the permutation group D'
n
(n) and appropriate graph counting series are used to obtain generating function which is used to enumerate constitutional isomers of substituted cycloalkanes and homo-loges of cycloalkanes.The cycle index of D'
nh
(2n) group is revised so that it can be used to enumerate chiral and achiral cycloalkanes.An alkyl configuration partition, then, is defined, and a simple method finding the numbers of isomers of homologs of cycloalkanes is given.Some numerical results are tabulated.
RESEARCH ON 2,5-DISUBSTITUTED OXAZOLES(Ⅲ)——2-p-BIPHENYL-5-PHENYL OXAZOLE AND SOME OF ITS 5-p-SUBSTITUTED PHENYL DERIVATIVES
Zhou Yimin, Yu Peifeng, Kao Chen-heng
1984, 5(2): 205-209.
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2-(p-Biphenyl)-5-phenyl-oxazole and thirteen 5-substituted phenyl-derivatives are synthesized. Among them, eleven are new compounds. The m. p. λmax of IR, UVabsorption spectra and fluorescence emission spectra, as well as fluorescence quantum efficiency and laser properties of the compounds are given in tables. It is found that eleven of the titled compounds are better than 2,5-diphenyl oxazole (PPO) in using as laser dye in near UVregion.Abrief discussion on the relation between the substituent effects and spectral properties of the compounds is given.
FOURIER INFRARED STUDY ON THE HYDRATION OF N,N-DIMETHYLFORMAMIDE AND N, N-DIMETHYLACET AMIDE
Shi Nai, Wu Jinguang, Xu Xianhuei, Xu Guangxian
1984, 5(2): 210-214.
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In this paper, the Fourier infrared spectra of N,N-dimethylformamide-(DMF ) and N,N-dimethylacetamide (DMA) and their water-containing sample have been investigated in the range 100-4000cm
-1
. The changes of frequencies and intensities resulted by the hydration of DMFand DMA have been observed from the substraction spectra.The bands at 1674 and 1647cm
-1
are assigned to the C＝O stretching vibration for the DMF and DMA, which decrease to 1651 and 1626cm
-1
respectively due to the formation of hydrogen bond between C＝O and water upon hydration.The hydration of DMF and DMA may also be characterized by the formation of hydrogen bond with the lone electron pair of the amide nitrogen. This may be seen from the substraction spectra of water-containing DMF and DMA in the IRfinger-print region and also in the far IRregion. The following bands change upon hydration. 1389, 1094, 659, 404, 354 and 329cm
-1
for DMF; 1397, 1188, 1014 and 591cm
-1
for DMA.On the other hand, the characteristic frequencies of pure water peaks at 1646 and 3403cm
-1
also change to 1690 and 3500cm
-1
upon hydration with DMF, or to 1663 and 3469cm
-1
upon hydration with DMA, because the electron density of the water molecule is increased as a result of receiving some electronic charge from the Lewis base.
ELECTROCHEMICAL BEHAVIOUR OF TITANIUM SUBCHLORIDES IN NaCl-KCl AND LiCl-KCl MELTS
Yang Qiqin, Liu Guankun
1984, 5(2): 215-220.
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The electrode reaction steps of Ti(Ⅲ) and Ti(Ⅱ) in NaCl-KCl and LiCl-KCl eutectic melts are investigated with the aid of chronopotentio-metry and linear sweep voltammetry. The diffusion coefficients of Ti (Ⅲ) and Ti(Ⅱ)at various temperatures and the diffusion activation energies are calculated.The effects of some factors, especially of the temperature, on the. electrocrystallization of titanium are also discussed.
A STUDY OF KINETICS AND MECHANISM OF HOMOGENEOUS CATALYTIC HYDROCHLORINATION OF ACETYLENE--A COMPLEX CATALYTIC SYSTEM OF HgCl
3
-BiCl
3
Hao Jinku, Zhang Qiyan, Chen Rongti(Y. T. Chen)
1984, 5(2): 221-226.
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The kinetics of the reaction of acetylene hydrochlorination in hydro-chloric acid with the complex catalyst HgCl
3
-BiCl
3
has been studied.The results showed that the rate equation of the reaction could be expressed by r=(k+k'[BiCl
3
]/[H
+
])[HgCl
2
]·[H
+
]
3
[CH≡CH] with k= 0.00239, k' =0.0269 (at 25℃). Areaction mechanism which includes two parallel reactions composed of some complicated concecutive reactions was proposed. The Corresponding apparent energies of activation are 13,4 Kcal/mol and 14.8 Kcal/mol.
PHOTOELECTRON SPECTROSCOPY AND THE LINE-ARITY OF THE HOMOLOGOUS ENERGY FACTOR(Ⅲ)--TWO DIRECTION EXTENDING SYSTEM
Sun Yukun, Li Lemin
1984, 5(2): 227-232.
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In the present investigation we have collected 48 sets of vertical ionization potentials of two direction extending system from UV photo-electron spectroscopy and found they fit the following linear equation I
p
(n,k) = a + bX(n,k) where I
p
(n,k) is the kth ionization potential of the nth member of the homologous series, a and b are constant, X(n,k) is called the homologous energy factor and is equal to X(n,k)= (2k- 1)/k sin (kπ/2N +1) 60.4 % of the correlation are of the "excellent" grades with correlation factor r≥0.99,and 35.4% of the"good "grades with r≥0.95 and others with r≥0.90.Also we have discussed the hyperconjugative effect of∏
4
4
.
KINETIC STUDY OF THE THERMAL DECOMPOSITION OF SOME ORGANOPHOSPHORUS PESTICIDES BY THERMAL ANALYSIS
Zhu Jing, Kong Dejun, Feng Jianguo, Yuan Zhengyu, Shen Xiaodong
1984, 5(2): 233-237.
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Recently, thermal analysis is a useful technique to study the kinetics of decomposition reaction. We used this technique to studythree kinds of organophosphorus pesticides——roger, dipterex andparathion-methyl and obtained kinetic equations of the theremal decomposition.These pesticides may decompose more or less readily in storage conditions. The rate of decomposition increases at higher temperature, especially to parathion-methyl, and an explosive violence would occur at certain temperature.In order to control the thermal decompositions of these pesticides either in storage or in production, we studied their decomposition kinetics and mechanisms and estimated the "stable life" at some lower temperature.
STUDIES ON THE POLYMERIZATION OF METHYL METHACRYLATE'INITIATED WITH ORGANIC HYDROPEROXIDE-AMINE SYSTEMS
Qiu Kunyuan, Guo Xinqiu, Wang Xianlun, Feng Xinde(S. T. Voong)
1984, 5(2): 238-244.
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Radical polymerization of methyl methacrylate (MMA) initiated with organic hydroperoxide-amine systems was studied. t-Butyl hydroper-oxide (TBH) and cumene hydroperoxide (CHP) were used as organic hydroperoxide components, aromatic tertiary amines such as N,N-di-methyl aniline (DMA)and its p-substitued derivatives i.e. N,N-dimeth-yl-p-toluidine (DMT) ,p-nitro-N,N-dimethyl aniline (NDMA) and p-di-methylamino benzaldehyde (DMAB) were used as amine components. It was found that, the different amine structures show little effect on the Rp of MMAboth in TBH-amine or CHP-amine system. So the values of RPare not so difference whether the substituents are electron-donating groups or electron-withdrawing groups. The values of overall activation energy Ea of MMApolymerization initiated with TBH-amine and CHP-amine were determined in the range of 50-57 KJ/mole for TBH-amine systems and 39-62 KJ/mole for CHP-amine systems respectively. Furthermore, the reaction mechanism and kinetics of polymerization of MMAinitiated with ROOH-DMTsystem were studied and discussed.
A KINETIC STUDY OF ALTERNATING COPOLYMERIZATION OF BUTADIENE AND PROPYLENE BASED ON VANADIUM-ALUMINIUM CATALYST (Ⅰ)——RATE EQUATION OF ALTERNATIOG COPOLYMERIZATION
Jiao Shuke, Huang Baoshen
1984, 5(2): 245-250.
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A kinetic character of alternating copolymerization of butadiene and propylene based on VO[OCH
2
C(CH
3
)
3
]
2
Cl-Al (i-Bu)
3
catalyst was studied. The first order dependence on monomer and catalyst concentration was determined. It was suggested that the rate equation of copolymerization is: -d[M]/dt=ka[Cat][M]] The first order rate constant in the temperature range - 20℃——80℃ and the total activation energy were also obtained.
STUDIES ON VISCOMETRIC BEHAVIOR OF SODIUM SALT OF POLY-6-SULFOHEXYL METHACRYLATE SOLUTIONS IN THE PRESENCE OF ADDED SALTS
Chen Zhusheng, Guo Fengzhi, Chen Huiying, Xu Bingzhi, Wang Renguan
1984, 5(2): 251-254.
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On the basis of experimental results, new empirical relationship between the concentrations of added salts, the molecular weight and the intrinsic viscosity of a polyelcctrolytc solution is obtained as follows [η]
s
=[η]
∞
+Ae
-BC
s
n
STUDY ON THE SYNTHESIS OF ZEOLITE NH
4
ZSM-5 BY DIRECT METHOD
Han Shuyun, Xu Ruren, Zuo Lihua, Jiang Zhiping, Jiang Weixin, Xu Yaqin, Zhang Jianmin
1984, 5(2): 255-256.
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The zeolite NH
4
ZSM-5 has been directly synthesized in the system of (NH
4
)
2
O-Al
2
O
3
-SiO
2
-H
2
Ousing "directing-agent".No alcohol, amine or other nitrogen containing compounds were used. The X-Ray diffraction pattern, TGAand DTApattern and infrared spectrum of it have been studied.
SCF-Xα-SW CALCULATION OF THE PHOTOELECTRON SPECTROSCOPY OF A SERIES OF M(CH
3
)
4
Peng Zhouren, Han Yingjian, Jia Xueqing, Yuh-kang, Pan
1984, 5(2): 257-258.
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The tetrahedrone molecules contaning elements Mof the grop IVhave received considerable attention both experimentally and theoretically, since they are new type compounds and reveal some special properties in chemistry. Following a suggestion by J. C. Slater, the SCF-Xa-SWmethod which was developed by K. H. Johnson is ideally suited for calculation of molecular photoelectron spectroscopy, because the transition state theory was adopted in the method, having corrected the frozen orbital approximation in Koopmans' theorem. The computer program, XASW, VAX-IBM VERSON 1, was used in the study and carried out on Siemens-7760 computer. The X
a
theoretical values of ionization potential calculated in this paper are in good agreement with the experiment ones.
THE DYNAMIC MECHANICAL PROPERTIES OF STAR BRANCHED POLYSTYRENE
Li Zhizhong, Yang Meilin, Shen Jiacong
1984, 5(2): 259-260.
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The dynamic mechanical properties of star branched polystyrene with nodule of divinylbenzene microgel are investigated by the technique of torsional braid analysis (TBA).
SPECTROPHOTOMETRIC DETERMINATION OF MICRO-AMOUNTS OF COPPER IN INDUSTRIAL EFFLUENTS WITH o-NITRO-PHENYLFLUORONE- N-CETYL PYRICINIUM CHLORIDE
Qi Wenbin, Hu Li
1984, 5(2): 261-263.
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Ahigh sensitive and selective micellar solubilizing spectrophotometric method is developed for the determination of microamounts of Cu
2+
in the industrial effluents with o-nitro-phenylfluorone as color reagent and N-cetyl pyridinum chloride as solubilizing and sensitizing agent. The molar absorptivity of the system is ε
600nm
=1.08×10
5
. The standard deviation and variation coefficient of the method are 0.37 and 2.1% (n=16) respectively. Beer's law is obeyed in the range of 2-8μg Cu
2+
/25ml. The new method has been used to determine micro-amounts of copper in various industrial effluents. The results obtained are good agreeable with those obtained by usuall diethyldithiocarbamate method. No organic solvent such as chloroform is used and the procedure is more simple and rapid.
DISSCUSSING ON THE REQULARITYOF THE SELECTIVITY OF THE LIQUID ION- EXCHANGER MEMBRANE ANION- SELECTIVE ELECTRODES
Gong Hongzhong, Wang Caili, Xiao Dan
1984, 5(2): 264-266.
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In the present paper,we suggest a equation to describe the coefficients K
ij
pot
of the liquid ion-exchanger membrane anion-selective electrodes and the interfering anion constructional parameters(z/r
2
)
j
.With the equation, more than forty electrode's data are treated.The results show that there is a good correlation between K
ij
pot
of the electrodes and (2/r
2
)
j
of the anions.
ISE-POTENTIOMETRIC TITRATION FOR RAPID MICRO ANALYSIS OF ORGANIC BORON
Wang Changyi, Chen Xingrong
1984, 5(2): 267-269.
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The quartz oxygen flask method combined with the BF
4
-
ISE-CETAB potentiometric titration has been used for the microdetermination of organic boroncompounds.This method is simple and rapid and the absolute error is within 0.3%. The presence of normal amount of N,S,P,F,Cl,Br,I, and As does not interfere to the analytical results.
THE HYDRATION ENERGIES OF LANTHANIDES METAL IONS
Feng Yubiao, Zhu Yanyun
1984, 5(2): 270-272.
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Coming out from the mutual polarization between the lanthanides metal ions and the water polarized molecules,and considering the relation among polarization and the effective nuclear charge number Z
*
of the lanthanides metal ions and the number m of the 4f electrons, this paper has given a half-empirical formula for calculating the hydrate energies as follows: L=a(Z
2
*
/r)+6m+c According to this formula the hydrate energies of the lanthanides metal ions are calculated with the results being satisfactory.
A STUDY ON THERMO-DECOMPOSITION AND KINETICS OF HEXAPOLYVANADATE
Li Guoliang, Li Jiali, Chen Jian
1984, 5(2): 273-275.
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This paper deals with thermo-decomposition kinetics of thermo-decomposition and the influence of temperature on the products of thermo-de-composition of Hexapolyvanadate by differential thermal analysis, x-rays diffraction analysis,electronic diffraction analysis and chemical analysis. It indicated that the thermo-decomposition of Hexapolyvanadate in air is zero-order. Apparent activation energy equals to 53.618 KJ·mol
-1
. The thermo-decomposition indicated that Hexapolyvanadate has one endo-thermal peak and one exothermal peak at 370℃ and 415℃ in air respectively. There is only one endothermal peak at 360℃ in nitrogen. Its decomposition is endothermal reaction. It produced V
3
O
7
intermediate compound. Oxidation of V
3
O
7
to V
2
O
5
is endothermal reaction. When Hexapolyvanadate decomposed in inert gas, the temperature rose and the content of low valence Vanadium in the products incressed.
STUDIES ON THE SYNTHESIS, STRUCTURE AND PROPERTIES OF THE CRYSTAL OF Mo-Fe-S COMPLEX
Zhang Zhigui, Wang Fengshan, Li Shuqin, Zhao Chengzhi, Li Ying
1984, 5(2): 276-278.
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In this paper, we report a new complex of Mo-Fe-Ssynthesized by the reaction of MoCl
5
, FeCl
2
·4H
2
O, PhCH
2
SH and diethyldithiocarba-mate(DTC) in MeOH, The complex is characterized by X-ray crystal-lography,IR,UV-visible,
1
H NMR,
13
C NMR, and EPRspectra, and the measurements of elemental analyses and electrochemical properties. The crystal of Mo-Fe-Scomplex containing multi-bond species is quite stable.
THERMODYNAMIC INVESTIGATION OF THE SOLVENT EXTRACTION SYSTEM (Ⅳ)——DETERMINATION OF THE ACTIVITY COEFFICIENTS OF TBP BY
32
P-LABLED TBP DISTRIBUTION METHOD
Peng Qixiu, Peng Li'e, Gao Hongcheng, Wang Wenqing
1984, 5(2): 279-280.
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Based on the previous paper
[1]
, the activity coefficients f
2
of TBP in n-amyl acetate, methyl cyclohexanone, n-C
8
H
17
OH, n-C
8
H
18
have been determined by
32
P-labled TBPdistribution method. These activity coefficients may be described by the following equations. lgf
2
=aN
1
2
and lgf
2
=A/(1+By)
2
, where y = N
2
/N
1
,N
1
and N
2
are molfractions of solvent and TBP, and constants a, A, Bwere obtained by graphical method. The effect of different solvents on the activity coefficients has also been discussed.
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