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Method for preparing silicone sealant reinforcing filler by utilizing waste silicon rubber acid splitting residues and crude oil alkali splitting ash

A technology of silicone sealants and reinforcing fillers, applied in the direction of adhesives, adhesive additives, non-polymer adhesive additives, etc., can solve the problems of no mention of alkaline ash, high energy consumption, etc., to avoid calcination exhaust gas, Good reinforcement effect, the effect of improving efficiency

Inactive Publication Date: 2018-03-20
山东宝龙达实业集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the above-mentioned processes only deal with the ash produced by acid cracking, but do not mention the alkaline ash produced by the alkali cracking of crude oil
Moreover, some processes adopt a high-temperature burning scheme, which will not only produce waste gas that is harmful to the environment, but also consume a lot of energy.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Crush 240Kg of waste silicone rubber concentrated sulfuric acid cracking residue and 120Kg crude oil alkali cracking ash to 200 mesh, add the sieved crude oil alkali cracking residue and the sifted waste silicone rubber concentrated sulfuric acid cracking residue to the neutralization reaction In the still, add 720kg of clear water again, stir for 2 hours, slowly add mass concentration and be 5% sodium hydroxide aqueous solution, until pH is 7, continue to stir for 2 hours, consume altogether 107kg of 5% sodium hydroxide aqueous solution. Use a vacuum filter to leave the solid matter on the filter cloth to form a filter cake, and spray 20kg of clean water on the filter cake to clean the remaining salt on the filter cake and neutralize it, and place the filter cake obtained by suction filtration in an oven at 110°C After drying for 6 hours, the dried powder was crushed and sieved to 200 mesh to obtain the reinforcing filler of the silicone sealant.

Embodiment 2

[0033] Crush 200Kg of waste silicone rubber concentrated sulfuric acid cracking residue and 80Kg crude oil alkali cracking ash to 200 mesh, add the sieved crude oil alkali cracking residue and the sifted waste silicone rubber concentrated sulfuric acid cracking residue to the neutralization reaction In the still, add 600kg of clear water again, stir for 1 hour, slowly add mass concentration and be 5% sodium hydroxide aqueous solution, until pH is 7, continue to stir for 2 hours, consume altogether 72kg of 5% sodium hydroxide aqueous solution. Use a vacuum filter to leave the solid matter on the filter cloth to form a filter cake, and spray 20kg of clean water on the filter cake to clean the salt remaining on the filter cake and neutralize it, and place the filter cake obtained by suction filtration in an oven at 120°C After drying for 4 hours, the dried powder was crushed and sieved to 300 mesh to obtain the reinforcing filler of the silicone sealant.

Embodiment 3

[0035] Crush and sieve 200Kg of waste silicone rubber concentrated sulfuric acid cracking residue and 33Kg crude oil alkali cracking ash to 200 mesh, add the sieved crude oil alkali cracking residue and the sifted waste silicone rubber concentrated sulfuric acid cracking residue to the neutralization reaction In the still, add 930kg of clear water again, stir for 1 hour, slowly add mass concentration and be 5% sodium hydroxide aqueous solution, until pH is 7, continue to stir for 2 hours, consume altogether 307kg of 5% sodium hydroxide aqueous solution. Use a vacuum filter to leave the solid matter on the filter cloth to form a filter cake, and spray 10kg of clean water on the filter cake to clean the remaining salt on the filter cake and neutralize it, and place the filter cake obtained by suction filtration in an oven at 150°C After drying for 3 hours, the dried powder was crushed and sieved to 400 mesh to obtain the reinforcing filler of the silicone sealant.

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PUM

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Abstract

The invention relates to a method for preparing silicone sealant reinforcing filler by utilizing waste silicon rubber acid splitting residues and crude oil alkali splitting ash. The method comprises the following steps: (1) crushing waste silicon rubber concentrated sulfuric acid splitting residues and the crude oil alkali splitting ash; (2) mixing the crushed crude oil alkali splitting ash and waste silicon rubber concentrated sulfuric acid splitting residues; adding water and stirring; regulating a pH (Potential of Hydrogen) value to be neutral; (3) carrying out suction filtration on materials obtained by step (2) to obtain a filter cake; carrying out water washing on the filter cake; (4) drying the filter cake subjected to the water washing; then crushing and sieving the dried materialto obtain the silicone sealant reinforcing filler. According to the method provided by the invention, the waste silicon rubber concentrated sulfuric acid splitting residues and the crude oil alkali splitting ash are used as raw materials; meanwhile, the treatment problems of the concentrated sulfuric acid splitting residues and the crude oil alkali splitting residues are solved at the same time, so that wastes produced in a whole technology for preparing DMC by splitting organic silicon are further reduced, and a good ecological environment is easy to maintain.

Description

technical field [0001] The invention relates to the technical field of silicone rubber cracking, in particular to a method for preparing silicone sealant reinforcing filler by using waste silicone rubber acid cracking slag and crude oil alkali cracking ash. Background technique [0002] According to the current survey on the cracking and recycling of waste silicone rubber, the waste silicone rubber is mainly cracked with concentrated sulfuric acid to produce silicone dimethyl crude oil (hereinafter referred to as crude oil). However, the crude oil produced in this way is often highly acidic and complex in composition, with a lot of silica ash brought out. Therefore, it is necessary to further carry out alkaline cracking on the produced crude oil to produce relatively pure DMC (dimethylsiloxane mixed ring body), etc., and then further decolorize and filter for subsequent application. [0003] Under the current technological conditions, the concentrated sulfuric acid cracking...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J11/04C09J183/04
CPCC09J11/04C08K2201/011C08K2201/014C08L2205/025C08L2205/035C09J183/04C08L83/04C08K13/06C08K9/06C08K3/36C08K3/26C08K3/04
Inventor 曾庆铭曹健
Owner 山东宝龙达实业集团有限公司