Abstract: The existence of phase of BiPO₄ was proved by the X-ray powder patterns of MoBiP_1.8/SiO₂ catalyst. The acidity of the catalyst was titrated by n-butyl-amine with the method of adsorption of colored indicators.The catalyst exhibited moderate acidity. The, presence of Bronsted and Lewis acids of the catalyst was discriminated by the infrared spectroscopic method of pyridine adsorption on the catalyst. The heats of adsorption of butene-1 and butene-2 were determined by the pulse method. The kinetics of isomerization of butene-1 over MoBiP_1.8 /SiO₂ catalyst has been investigated by the flowrecirculation glass non-gradientness reactor. The kinetic equations obey the L-Hmechanism of triangular reaction of isomerization of butene. When the parameters of simplified kinetic equation of L-Hmechanism were estimated by the linear least square method, the condition number of coefficient matrix of norm equation was more than 10⁸.

Key words: Method of orthoganel design, Isomrization of butene, Complex kinetics