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Preparation method of sulfydryl lignin for regenerating waste rubber

A waste rubber and lignin technology, which is applied in the field of waste rubber regeneration, can solve the problems of low cost of use, achieve low cost of use, solve environmental pollution problems, and achieve high mechanical properties

Inactive Publication Date: 2014-09-03
ANHUI GVG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using mercapto lignin to complete waste rubber regeneration, the process is simple, the regeneration effect is good, and the use cost is low. This route has not been reported

Method used

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  • Preparation method of sulfydryl lignin for regenerating waste rubber
  • Preparation method of sulfydryl lignin for regenerating waste rubber
  • Preparation method of sulfydryl lignin for regenerating waste rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Add 6.5 g of mercaptoacetic acid, 3.8 g of acetic anhydride, and 1.0 g of concentrated sulfuric acid into a brown ground-mouth jar, mix well, add 5 g of kraft lignin powder, mix well, cover and seal, and place in an oven for 40 o C was kept at a constant temperature for 6 h. The mixture was taken out, vacuum filtered, and washed repeatedly with absolute ethanol to neutrality, 40 o C under vacuum drying to obtain this mercapto lignin regeneration agent for subsequent use. The thiol content was determined to be 1.52% by back titration argentometric method.

[0020] Grind waste butyl rubber tires into a fine powder of about 20 meshes, mix with mercapto lignin regeneration agent at a mass ratio of 100:12, mix in a mixer for more than 5 minutes, and press the mixer for 3 times After the film is released, the finished reclaimed rubber product is obtained. The finished reclaimed rubber can be directly put on the vulcanizer at 145 o C vulcanization to obtain rubber product...

Embodiment 2

[0023] Add 7 g of thioglycolic acid, 4.0 g of acetic anhydride, and 1.0 g of concentrated sulfuric acid into a brown ground-mouth jar, mix well, add 5 g of kraft lignin powder, mix well, cover and seal, and place in an oven for 40 o C was kept at a constant temperature for 6 h. The mixture was taken out, vacuum filtered, and washed repeatedly with absolute ethanol to neutrality, 40 o C under vacuum drying to obtain this mercapto lignin regeneration agent for subsequent use. The sulfhydryl content was determined to be 1.43% by back titration argentometric method.

[0024] Grind waste ethylene-propylene rubber tires into a fine powder of about 20 meshes with a grinder, mix with mercapto lignin regenerant at a mass ratio of 100:15, mix in a mixer for more than 5 minutes, and press into tablets with a mill for 3 After several times, the film is produced to obtain the finished reclaimed rubber. The finished reclaimed rubber can be directly on the vulcanizing machine for 100 o ...

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Abstract

The invention provides a preparation method of sulfydryl lignin for regenerating waste rubber. Sulfydryl lignin (LS-SH) is prepared by performing sulfhydrylation on industrial lignin (LS) by virtue of mercaptoacetic acid. Sulfydryl lignin is large in reaction activity and simple in preparation process, and can be used for regeneration of the waste rubber at room temperature by adopting an ordinary rubber refining machine. The process is low in regeneration cost and good in performance of regenerated rubber, has good industrial application prospects, can be used for consuming lignin in pulping and paper-making industrial wastewater to a certain extent, and can be used for solving the problem of environmental pollution.

Description

technical field [0001] The invention belongs to waste rubber regeneration technology, in particular to a preparation method of mercapto lignin used for waste rubber regeneration. technical background [0002] With the development of the automobile industry, a huge amount of waste rubber is produced all over the world, how to effectively deal with it has become a common concern of the whole society. Waste rubber recycling technology has therefore become the research focus of scientists around the world. In the study of waste rubber recycling, chemical treatment is relatively more effective. Compared with physical action, chemical regeneration is to use chemical additives to destroy the cross-linked rubber by means of mechanical force under the condition of elevated temperature, so as to achieve the purpose of regeneration. In chemical regeneration, chemical regenerants are used, and almost all of these chemicals are smelly and harmful under high temperature and pressure. T...

Claims

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Application Information

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IPC IPC(8): C08H7/00C08J11/28
CPCY02W30/62
Inventor 葛九敢黎广孙兰娟刘善和李健
Owner ANHUI GVG NEW MATERIAL CO LTD
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