Method for improving catalytic performance and stability of benzene hydrogenation catalyst

Abstract

The invention relates to a method for improving catalytic performance and stability of a benzene hydrogenation catalyst and belongs to the technical field of the benzene hydrogenation catalyst. C4-C15carboxylic acid and a sodium hydroxide solution are subjected to a saponification reaction to produce a sodium carboxylate solution, a transition metal inorganic salt solution is added to the sodiumcarboxylate solution for a double decomposition reaction, cyclohexane is added for extraction to obtain a transition metal carboxylate cyclohexane solution, the transition metal carboxylate cyclohexane solution is subjected to impurity removal treatment until free water and emulsification impurities are not detected from the upper layer of the transition metal carboxylate cyclohexane solution, andthen, a trialkyl aluminum solution and alcohols are sequentially added for a complexation reaction to obtain the benzene hydrogenation catalyst, wherein impurity removal equipment is serially connected impurity removal tanks. The benzene hydrogenation catalyst is used in a benzene hydrogenation production process, the consumption of the benzene hydrogenation catalyst is greatly reduced, the running period is prolonged, the yield of downstream products is increased, the production cost is reduced, and industrial application and production are facilitated.

Description

technical field [0001] The invention relates to a method for improving the catalytic performance and stability of a benzene hydrogenation catalyst, belonging to the technical field of benzene hydrogenation catalysts. Background technique [0002] The preparation method of benzene hydrogenation catalyst generally can be carried out according to the following steps: at normal temperature and pressure, at first the fourth component water is added in the hexanaphthene solution of transition metal carboxylate, makes transition metal carboxylate be The fourth component is saturated with water, then the trihydrocarbyl aluminum solution is added to the transition metal carboxylate solution, and finally the third component alcohols are added. The preparation of the transition metal carboxylate used is to carry out saponification reaction between C4-C15 carboxylic acid and sodium hydroxide to generate sodium carboxylate without washing, and then add transition metal inorganic salt to ...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, to improve the quality of the catalyst through the cleaning method, in addition to timely discharging the water and impurities brought in by the transition metal carboxylate cyclohexane solution from the system, it is also necessary to use an organic solvent to soak and clean the entire reaction system. The cleaning process must Stopping the catalyst will reduce the production time of the catalyst, and the cleaning time is not easy to control, resulting in a decline in product quality and instability

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