Mesoporous carbon catalyst with load palladium (Pd) and application of mesoporous carbon catalyst

Abstract

The invention relates to a mesoporous carbon catalyst with load palladium (Pd). The mesoporous carbon catalyst is characterized by preprocessing mesoporous carbon before processing the load Pd. A processing method comprises one or combination of the following steps of: adding and immersing the mesoporous carbon in 10% to 30% peroxide solution for 1 hour to 24 hours, and washing and removing peroxide; and adding and immersing the mesoporous carbon in 1M to 6M of hydrochloric acid solution for 1 hour to 24 hours, and washing and removing hydrochloric acid. In addition, the invention also relates to application of the mesoporous carbon catalyst in preparation of 4,4'-aminostilbene-2,2'-disulfonic acid (DSD acid). According to the invention, as the catalyst carrier is preprocessed, the catalyst activity is improved, and the catalyst consumption is reduced; and as technological conditions are optimized, the conversion rate of 4,4'-diaminostilbene-2,2'-disulfonic acid (DNS acid) to the DSD Acid is improved effectively, and the high selectivity of the product DSD acid is maintained.

Description

technical field [0001] The invention belongs to the technical fields of fine chemical industry and organic chemical industry, and specifically relates to a mesoporous carbon catalyst loaded with palladium and its application. Background technique [0002] 4,4'-diaminostilbene-2,2'-disulfonic acid (DSD acid) is "paste or light yellow or light yellow-brown needle, block or powder" or "yellow or light yellow Acicular hygroscopic crystals", flammable, very slightly soluble in water, soluble in ethanol, ether, easily soluble in alkali solution. It is easily oxidized and turns red in the air, and can be diazotized to form a yellow diazo compound. DSD acid is an important organic chemical raw material and intermediate in the field of fine chemicals. It has multiple uses and is one of the main substitutes for benzidine. Fluorescent brighteners, dyes, and mothproof agents synthesized with DSD acid are used Widely used in synthetic detergents, textile industry, plastics, photographi...

AI Technical Summary

Problems solved by technology

The yield of the product obtained in this process is low, the quality is poor, and a large amount of iron sludge and amine-containing wastewater are produced, which are difficult to treat and cause environmental pollution.

Due to the small batch size and high power consumption of the electrochemical reduction method, the value of industrial production has yet to be developed.

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