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A kind of treatment method of isooctyl thioglycolate rectification waste

A technology for treating isooctyl thioglycolate and a treatment method, which is applied in the field of treatment of isooctyl thioglycolate rectification waste, can solve the problems of difficult implementation, expensive and efficient catalyst and oxidant, and high cost, and achieve simple and easy operation and low operating cost The effect of low cost and short process chain

Active Publication Date: 2018-02-16
湖北犇星新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These treatments require specific equipment as well as expensive and efficient catalysts and oxidants
Compared with the treatment of rectification waste, the cost is too high and it is not easy to implement
And only adopt lye absorption or direct oxidation method to process, the content of isooctyl thioglycolate in the final product is higher, can not effectively reduce the content of isooctyl thioglycolate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1 processes the method (1) of isooctyl thioglycolate rectification waste

[0028] Take 250 g of isooctyl thioglycolate rectification waste, wash with 250 g of 6% NaOH solution, wash for 20 min, and separate to get the organic phase. Adjust the pH of the oil layer to 8.2, add 49.5 g of 20 wt % NaClO solution, and react at 70-80° C. for 1 h. After the reaction was completed, the organic phase was obtained by liquid separation, and an appropriate amount of water was added for washing, and the liquid separation was carried out again to obtain the organic phase. The organic phase was dried by vacuum dehydration at 80°C. Sampling was carried out to detect the content of isooctyl thioglycolate at 0.20%.

Embodiment 2

[0029] Embodiment 2 processes the method (2) of isooctyl thioglycolate rectification waste

[0030] Take 250 g of isooctyl thioglycolate rectification waste, wash with 200 g of 7% NaOH solution, wash for 15 min, and separate to get the organic phase. Adjust the pH of the oil layer to 8.0, add 30g of 30wt% hydrogen peroxide, and react at 70°C for 70min. After the reaction was completed, the organic phase was obtained by liquid separation, and an appropriate amount of water was added for washing, and the liquid separation was carried out again to obtain the organic phase. The organic phase was dried by vacuum dehydration at 90°C. Sampling was carried out to detect the content of isooctyl thioglycolate to be 0.53%.

Embodiment 3

[0031] Embodiment 3 processes the method (3) of isooctyl thioglycolate rectification waste

[0032] Take 250 g of isooctyl thioglycolate rectification waste, wash with 200 g of 7% NaOH solution, wash for 30 min, separate to get the organic phase. Adjust the pH of the oil layer to 6.2, add 30 g of 30 wt % hydrogen peroxide, and react at 60° C. for 1.5 h. After the reaction was completed, the organic phase was obtained by liquid separation, and an appropriate amount of water was added for washing, and the liquid separation was carried out again to obtain the organic phase. The organic phase was dried by vacuum dehydration at 90°C. Sampling was carried out to detect the content of isooctyl thioglycolate to be 0.75%.

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Abstract

The invention provides a treatment method of isooctyl thioglycolate rectification waste material. The treatment method comprises following steps: the isooctyl thioglycolate rectification waste material is washed with a diluent alkali, organic phase pH value is adjusted, oxidation of the organic phase is carried out, and water washing and vacuum dehydration drying are carried out. Operation of the treatment method is simple; cost is low; the content of isooctyl thioglycolate in a treatment product is low; the content of isooctyl thioglycolate is reduced to 0.20%; environment pollution is reduced; the treated isooctyl thioglycolate rectification waste material can be used in processing of soft PVC; and application prospect is promising.

Description

technical field [0001] The invention relates to a method for treating isooctyl thioglycolate rectification waste, in particular to a method for reducing the mercaptan content in the rectification waste of isooctyl thioglycolate and improving the purity of sulfides in the rectification waste. Background technique [0002] During the synthesis of isooctyl thioglycolate, side reactions will occur to generate monosulfide and disulfide. The boiling point of these by-products is much higher than the boiling point of isooctyl thioglycolate, and in the rectification process of isooctyl thioglycolate, they remain at the bottom of the rectification still and become rectification waste. [0003] Domestically, there are few reports on the waste treatment of isooctyl thioglycolate. Wang Yanjun announced a method of utilizing isooctyl thioglycolate residue at the bottom of the tank to treat it. The residue at the bottom of the isooctyl thioglycolate is saponified to recover isooctyl alc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C319/28C07C323/52
CPCC07C319/28C07C323/52
Inventor 戴百雄宫庭李慧张建广张硕罗斌杨圣海
Owner 湖北犇星新材料股份有限公司
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