Catalyst for diphenylguanidine (DPG) serving as accelerating agent in oxygen oxidation synthesis production process, and preparation method thereof

Abstract

The invention relates to a catalyst for diphenylguanidine (DPG) serving as an accelerating agent in an oxygen oxidation synthesis production process and a preparation method thereof. The catalyst is one or more of metal salts, such as copper acetate, copper sulfate, copper nitrate, cobalt acetate, cobalt sulfate, cobalt linoleate, cobalt nitrate, cerium acetate, cerium sulfate, cerium nitrate, manganese acetate, manganese sulfate, manganese nitrate and the like; and a carrier of the catalyst is one or more of active carbon, SiO2, Al2O3, TiO2, a mesoporous material molecular sieve, a micropore material molecular sieve and the like. The prepared catalyst is used in reaction of synthesizing the DPG by oxygen oxidation; and the reaction is used for reflecting the performance of the catalyst. The use amount of the catalyst is 0.02 to 0.1 percent of the weight of reactants. The catalyst provided by the invention has the advantages of rational formula, small use amount and good catalysis effect, and contains active ingredients and the carrier; furthermore, the dispersion area of the active ingredients is enlarged, so the contact area between the active ingredients and the reactants is enlarged and the reaction speed is increased; meanwhile, the use amount of the catalyst is reduced; and yield of CBS is up to over 97 percent under the optimized reaction conditions.

Description

technical field [0001] The present invention relates to a catalyst used in the oxygen oxidation synthesis process of a rubber vulcanization accelerator DPG (chemical name is diphenylguanidine), specifically, it relates to the composition and preparation of a catalyst used in the DPG oxygen oxidation process method. Background technique [0002] Accelerator Diphenylguanidine (DPG) is a medium-speed accelerator for natural rubber and synthetic rubber, and also an activator for thiazoles, thiurams, and sulfenamides. There are plasticizers and peptizers in neoprene. It is mainly used in the manufacture of rubber products such as tires and rubber soles. It is mentioned in US1,422,506 that as early as 1869, there was a report on the preparation of accelerator DPG by PbO method, and the Pb method was also improved in the literature. However, because this method uses heavy metal Pb, it is very harmful to human body and environment, and this method has basically stopped using in t...

AI Technical Summary

Problems solved by technology

However, due to the use of heavy metal Pb in this method, which is very harmful to human body and environment, this method has basically stopped using in the late 1990s

In the mid-1990s, there were reports of zinc oxide and iron oxide methods in China, but they were not popularized due to various reasons and have been eliminated.