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Catalysts used in production of promoter 2,2'-dithiobisbenzothiazole, and preparation method thereof

A dithiodibenzothiazole and catalyst technology, which is applied in the direction of molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of uninvolved catalyst research, low yield of feed agent DM, etc., and achieve catalytic The effect is good, the process is simple, and the effect of reducing the dosage

Inactive Publication Date: 2012-02-15
KEMAI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The yield of the feed agent DM obtained by this method is not high, only about 97%, and the research on the catalyst is not involved in this method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Measure dry SiO 2 The saturated adsorption capacity of the carrier (80 mesh) is 0.9mL / g, weigh 100g of the carrier, and put it in a crucible for subsequent use; dissolve 1g of copper sulfate in 90mL of distilled water, and stir to make it completely dissolve to form an aqueous solution of copper sulfate; Slowly pour the aqueous solution into the crucible containing the carrier, stir while pouring, and continue to stir after pouring to make it fully mixed; place it at room temperature for 8 hours to fully infiltrate the copper sulfate solution and the carrier; put the soaked mixture in 100 ℃ drying oven for 8 hours, the dried mixture was placed in a muffle furnace for roasting, the roasting temperature was 400 °C, and the roasting time was 4 hours; After the particles are crushed, pass through an 80-mesh sieve, put the sieved catalyst in a sealed bag, and put it in a desiccator for standby.

[0023] This catalyst is used in the reaction of oxygen oxidation to synthesize...

Embodiment 2

[0025] Measure dry Al 2 o 3 The saturated adsorption capacity of carrier (200 mesh) is 1.1mL / g, weighs this carrier 100g, puts in the crucible for subsequent use; Dissolve 5g cobalt acetate in 110mL ethanol, stir to make it all dissolve and form the ethanolic solution of cobalt acetate; Slowly pour the alcohol solution of cobalt acetate into the crucible containing the carrier, stir while pouring, and continue to stir after pouring to make it fully and evenly mixed; place it at room temperature for 24 hours, and the cobalt acetate solution and the carrier are fully infiltrated; after infiltration The mixture was dried in a drying oven at 120°C for 8 hours, and the dried mixture was roasted in a muffle furnace at a temperature of 800°C for 12 hours; The sintered large particles are crushed and passed through a 200-mesh sieve, and the sieved catalyst is placed in a sealed bag and placed in a desiccator for standby use.

[0026] This catalyst is used in the reaction of oxygen o...

Embodiment 3

[0028] Measure dry TiO 2 The saturated adsorption capacity of the carrier (240 mesh) is 1.3mL / g. Weigh the carrier 100g and put it in a crucible for subsequent use; dissolve 15g of cerium nitrate in 130mL of distilled water and stir to make it all dissolve to form an aqueous solution of cerium nitrate; Slowly pour the aqueous solution into the crucible containing the carrier, stir while pouring, and continue to stir after pouring to make it fully mixed; place it at room temperature for 48 hours to fully infiltrate the cerium nitrate solution and the carrier; put the soaked mixture in 150 ℃ drying oven for 8 hours, the dried mixture was placed in a muffle furnace for roasting, the roasting temperature was 550 °C, and the roasting time was 24 hours; After the particles are crushed, pass through a 240-mesh sieve, put the sieved catalyst in a sealed bag, and put it in a desiccator for later use.

[0029] This catalyst is used in the reaction of oxygen oxidation to synthesize DM. ...

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Abstract

The invention relates to catalysts used in the production of a promoter 2,2'-dithiobisbenzothiazole, and a preparation method of the catalysts. The catalysts can be one or more selected from metal salts of copper acetate, copper sulfate, copper nitrate, cobalt acetate, cobalt sulfate, cobalt nitrate, cerium acetate, cerium sulfate, cerium nitrate, chrome acetate, chrome sulfate, chrome nitrate, and the like. Carriers of the catalysts can be one or more selected from SiO2, Al2O3, TiO2, mesoporous material molecular sieve, microporous material molecular sieve, and the like. Prepared catalysts are used in a reaction for synthesizing DM by using an oxygen oxidizing method, and the reaction is used for representing performances of the catalysts, wherein a catalyst dosage is 0.01 to 0.1% of the reactant by weight. The catalysts provided by the invention are advantaged in reasonable formulation, low dosage, and good catalytic effect. The catalysts contain active components and carriers. Dispersion areas of the active components are enlarged, such that contact areas between the active components and the reactants are enlarged. Therefore, reaction speed is improved, and the catalyst dosage is reduced. Also, reaction conditions are optimized, such that the yield of DM is higher than 98%.

Description

technical field [0001] The invention relates to a catalyst used in the oxygen oxidation synthesis process of a rubber vulcanization accelerator DM (chemical name is 2,2'-dithiodibenzothiazole), specifically, it relates to a DM oxygen oxidation process The composition and preparation method of the catalyst used in the paper. Background technique [0002] Vulcanization accelerator plays a very important role in the rubber vulcanization process. It can greatly accelerate the reaction between rubber and vulcanizing agent, improve production efficiency, and at the same time improve the physical and mechanical properties of vulcanized rubber. DM is an indispensable part of the rubber industry. a major accelerator. The existing production process of DM (MBTS) can be divided into four types according to different oxidants: chlorine gas method, sodium nitrite method, hydrogen peroxide method and oxygen method. Domestic manufacturers mainly adopt the first three production methods, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/72B01J23/75B01J23/10B01J29/48B01J29/80B01J23/83B01J27/25C07D277/78C08K5/47C08L21/00
Inventor 尹红伟
Owner KEMAI CHEM
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