The production method of accelerator n-tert-butyl-2-benzothiazole sulfenamide

The technology of a benzothiazole sulfenamide and a production method is applied in the production field of the accelerator NS process, which can solve the problems of increasing the amount of waste water and increasing the production cost, and achieve the effects of reducing the discharge of waste water and reducing the cost.

Inactive Publication Date: 2011-12-21
KEMAI CHEM
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AI Technical Summary

Problems solved by technology

At present, the domestic main production methods are sodium hypochlorite oxidation method and hydrogen peroxide oxidation method. Both methods adopt the excessive addition method of tert-butylamine, that is, the quantitative accelerator M (2-mercaptobenzothiazole) and excessive tert-butylamine are put into the reactor, and The accelerator

Method used

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  • The production method of accelerator n-tert-butyl-2-benzothiazole sulfenamide

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Embodiment

[0015] 1. Add 32.5g of accelerator M to 100ml of water, add 2ml with a concentration of 7% to add a total of 125ml, and make up to 125ml when the volume is insufficient (the first batch of water will be used to make up, and the mother liquor will be used to replace water to make up later), and put it into a container with volume Reserve in a graduated container.

[0016] 2. Put 100ml of sodium hypochlorite with 18.4-18.6g / 100ml of available chlorine and 0.8-1g / 100ml of free alkali into a container with volume scale for later use.

[0017] 3. First put 15g (21.7ml) of tert-butylamine into a 300ml reaction vessel, stir and heat up to 43-45°C, then add 5ml of accelerator M slurry as a base material, and then add accelerator M slurry and sodium hypochlorite by The volume ratio is 5:3 for dropwise addition, and the dropwise addition needs to be completed within 45-55 minutes, and the temperature during the dropwise addition cannot be higher than 45°C.

[0018] Add 15g of tert-buty...

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Abstract

The present invention relates to the production method of promotor N-tert-butyl-2-benzothiazole sulfenamide, 32.5g promotor M is added in 100ml water, add 2 milliliters concentration again and be 7% and add dispersing agent total 125ml, make up water Or mother liquor to 125ml to make accelerator M slurry, put it in a container for standby; put 100ml of sodium hypochlorite with 18.4-18.6g/100ml of available chlorine and 0.8-1g/100ml of free alkali into the container for standby; put tert-butylamine into a 300ml reaction container , the molar ratio of the total amount of tert-butylamine to the total amount of accelerator M is 1.06:1, stir and heat up to 43-45°C; add 5ml of accelerator M slurry as a base material, and then add the accelerator M slurry in step 1) and the sodium hypochlorite in step 2) are added dropwise in a volume ratio of 5:3, and the dropwise addition needs to be completed within 45-55 minutes, and the temperature during the dropping process cannot be higher than 45°C. The invention does not need mother liquor recovery and distillation, reduces waste water discharge, lowers costs, is economical and environmentally friendly, and all technical indicators of the product meet national standards.

Description

technical field [0001] The invention relates to a new method for production of accelerator NS (N-tert-butyl-2-benzothiazole sulfenamide) (abbreviated as TBBS), and belongs to the technical field of rubber accelerator production. Background technique [0002] Accelerator NS (TBBS) is a retardation accelerator, suitable for natural rubber, butadiene rubber, isobutylene rubber, styrene-butadiene rubber and natural rubber reclaimed rubber, and is very safe at operating temperature. At present, the domestic main production methods are sodium hypochlorite oxidation method and hydrogen peroxide oxidation method. Both methods adopt the excessive addition method of tert-butylamine, that is, the quantitative accelerator M (2-mercaptobenzothiazole) and excessive tert-butylamine are put into the reactor, and The accelerator NS is generated under the action of the oxidizing agent, and the molar ratio of the accelerator M and tert-butylamine is generally 1:2.7-3. Due to the excessive amou...

Claims

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Application Information

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IPC IPC(8): C07D277/80
Inventor 马英杰宫志杰田苗
Owner KEMAI CHEM
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