Condensating reductive alkylation catalyst, preparation method and uses thereof

Abstract

The invention provides a condensation reductive alkylation catalyst and preparation method and use thereof. The catalyst pertains to copper-based catalyst, and is prepared by coprecipitation method with acid or salt thereof as precipitator. The preparation method is energy saving and environment friendly for including no impurity natrium, which avoids environmental protection problem existing in catalysis preparation technology with traditional precipitation method and reduces washing water use. The specific surface area of the catalyst is 30.0 to 75.0m<2> / g and pore volume 0.08 to 0.15ml / g. The catalyst can be used in condensation technology of RT Base and aliphatic ketone to inhibit an unnecessary side reaction in production of anti-aging agent 4010NA and 4020, especially to a reaction of aliphatic ketone alkylation regent hydrogenated to corresponding mellow.

Description

Technical field: [0001] The invention belongs to the technical field of catalysts, and relates to a new and efficient catalyst system for the hydrogenation reduction alkylation reaction of 4-aminodiphenylamine (RT base) and aliphatic ketones and reduces the hydrogenation rate of the alkylating agent aliphatic ketones side effects. Background technique: [0002] The condensation-reduction alkylation product of RT base and aliphatic ketone is p-phenylenediamine anti-aging agent, which is a general-purpose rubber anti-aging agent. It has excellent protection against heat, catalytic oxidation of harmful metals, flex cracking, etc., especially the anti-ozone aging performance is not possessed by other anti-aging agents, so it is widely used in tires, synthetic rubber and other rubber products. Its general chemical structural formula is: [0003] [0004] At present, the above-mentioned anti-aging agents are usually prepared by condensation reduction alkylation method. The ma...

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Problems solved by technology

[0008] Due to the existence of the side reaction of hydrogenation of ketones to alcohols, it not only consumes a large amount of raw material ketones and hydrogen, resulting in waste of raw materials, but also releases a large amount of hydrogenation side reaction heat, which brings great difficulties to production. Seriously, it will lead to more side reactions of reactants and products, which will bring difficulties to product separation, deactivate catalysts, and reduce product quality

U.S. Patents US3366684, US4043942, etc. have done a lot of work on improving the selectivity of the main reaction and suppressing the side reactions of hydrogenation of ketones, but because of the use of noble metal catalysts, there are still problems with expensive catalysts, high raw material consumption, and large amounts of post-treatment materials. , the disadvantage of troublesome recovery of excess ketone

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