Catalyst, process for its preparation and process and apparatus for the oxidation synthesis of ns using the same

By using a method for preparing a composite catalyst supported on activated carbon and a tubular oxidation reactor, the problems of environmental protection difficulties and high production costs in the oxidative synthesis of rubber accelerator NS have been solved. This method achieves efficient and environmentally friendly oxygen-catalyzed oxidation synthesis with short reaction time and significantly improved yield and purity.

CN117983201BActive Publication Date: 2026-06-12SHANDONG SUNSINE CHEM
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANDONG SUNSINE CHEM
Filing Date
2024-01-29
Publication Date
2026-06-12

AI Technical Summary

⚠Technical Problem

Existing methods for the oxidative synthesis of rubber accelerator NS suffer from problems such as difficulty in environmental treatment, high production costs, long reaction times, and low yields.

⚗Method used

A composite catalyst supported on activated carbon, comprising a main catalyst of 2,4,6-trihydroxypyrimidine and a co-catalyst of stannous oxide or palladium oxide, is used to synthesize NS by catalytic oxidation of oxygen in a tubular oxidation reactor, using oxygen as the oxidant. The preparation method of the composite catalyst supported on activated carbon includes dissolving and adsorbing it into the pores of activated carbon in an acidic solution, then reacting it with carbonate and calcining it at high temperature to expand the pore structure.

🎯Benefits of technology

It achieves zero waste salt generation, low wastewater index, low treatment cost, short reaction time and high yield, significantly improves the purity and yield of rubber accelerator NS product, shortens the reaction time to 0.5-1.5h, achieves a yield of over 98.5% and a purity of over 99.8%.

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Abstract

The application discloses a catalyst, a preparation method thereof, and a process and equipment for synthesizing NS by oxidation. The activated carbon loaded composite catalyst claimed by the application comprises a main catalyst and an auxiliary catalyst, wherein the main catalyst is 2,4,6-trihydroxy pyrimidine, and the auxiliary catalyst is one or both of stannous oxide and palladium suboxide. In the application, the main catalyst and the auxiliary catalyst can be more adsorbed in the pore structure of activated carbon, and in the process of synthesizing rubber accelerator NS by oxidation, the reaction time of the reaction of synthesizing rubber accelerator NS by oxidation can be effectively shortened.
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