A method for preparing precipitation white carbon black by using organosilicon dust-containing tail gas hydrolyzate

A precipitation method of silica and organosilicon technology, applied in the chemical industry, can solve the problems of organosilicon dust-containing tail gas hydrolyzate pollution and other problems, and achieve the effects of significant social and economic benefits, simple process technology and low production cost

Active Publication Date: 2016-03-09
浙江中天东方氟硅材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the defect that the organosilicon monomer factory adopts traditional accumulation, landfill and other treatment methods for the organic silicon dust-containing tail gas hydrolyzate to cause pollution, the invention provides a method for preparing precipitation method white carbon black by using the organosilicon dust-containing tail gas hydrolyzate method, this method prepares high value-added, better performance precipitated white carbon black by chemical precipitation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Put 100 parts of organic silicon dust-containing tail gas hydrolyzate and 10 parts of petroleum ether (boiling range 60~90°C) into the reactor, start stirring at a stirring speed of 450r / min, raise the temperature of the system to 80°C, stir at constant temperature for 1 hour, and then once Add 150 parts of caustic soda solution with a mass concentration of 30%, continue the reaction for 5 hours, then stop, let it stand for stratification, take the clear liquid layer and filter it, decolorize it with activated carbon of 1% of the total mass of sodium silicate solution at 60°C for 25 minutes, and get Colorless and clear sodium silicate solution; put the sodium silicate solution into the reactor, add sodium dodecyl sulfate with 2% of the total mass of the sodium silicate solution, and raise the temperature of the system to 60°C, at a stirring speed of 850r / min Add dilute hydrochloric acid with a mass concentration of 31% until the pH of the system is 7, stop adding dilute ...

Embodiment 2

[0030] Put 100 parts of organic silicon dust-containing tail gas hydrolyzate and 50 parts of petroleum ether (boiling range 60~90°C) into the reactor, start stirring at a stirring speed of 400r / min, raise the temperature of the system to 80°C, stir at constant temperature for 1 hour, and then once Add 200 parts of caustic soda solution with a mass concentration of 30%, continue the reaction for 5 hours, then stop, let it stand for stratification, take the clear liquid layer and filter, decolorize with activated carbon of 1% of the total mass of sodium silicate solution at 60°C for 30 minutes to obtain Colorless and clear sodium silicate solution; put the sodium silicate solution into the reactor, add polyethylene glycol with a total mass of 2% of the sodium silicate solution, raise the temperature of the system to 60°C, and add it at a stirring speed of 750r / min Concentrated sulfuric acid with a mass concentration of 86%, stop adding concentrated sulfuric acid until the pH of t...

Embodiment 3

[0032]Put 100 parts of organic silicon dust-containing tail gas hydrolyzate and 30 parts of petroleum ether into the reactor, start stirring at a stirring speed of 350r / min, raise the temperature of the system to 80°C, stir at a constant temperature for 1 hour, and then add 100 parts at a time with a mass concentration of 30 % caustic soda solution, continue to react for 5 hours and then stop, let it stand for stratification, take the clear liquid layer and filter, decolorize with activated carbon of 1% of the total mass of sodium silicate solution at 60°C for 25 minutes to obtain a colorless and clear sodium silicate solution ;Put the sodium silicate solution into the reactor, add sodium tridecylsulfonate with a total mass of 2% of the sodium silicate solution, raise the temperature of the system to 60°C, and add trimethylchlorosilane at a stirring speed of 800r / min , stop adding trimethylchlorosilane until the pH of the system is 7, continue to stir for 1 hour, let it age for...

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Abstract

The present invention relates to a method for preparing precipitated white carbon black by using the hydrolyzate of organic silicon dust-containing tail gas. Mixing, the auxiliary dispersing agent is selected from low-carbon alkanes, small molecular alcohols or low molecular aromatics; b, the mixture obtained in step a is mixed with caustic soda solution under stirring conditions, after the reaction is completed, let it stand for stratification, and take the middle layer to clear Filter the liquid and decolorize it with activated carbon to obtain a colorless and clear sodium silicate solution; c. Add a surfactant to the sodium silicate solution, raise the temperature of the system to above 60°C, and add acid solution under stirring until the pH of the reaction system = 7 o'clock, stop adding, let it stand for aging, filter, azeotropic dehydration, and dry to obtain the product. At present, organosilicon monomer factories accumulate or landfill the hydrolyzate of organosilicon dust-containing tail gas, but the present invention can turn waste into treasure by using the above method to convert it into white carbon black products.

Description

technical field [0001] The invention relates to a synthesis process of precipitated white carbon black, a product in the chemical industry, in particular to a method for preparing precipitated white carbon black by utilizing organic silicon dust-containing tail gas hydrolyzate. Background technique [0002] Dusty tail gas includes fluidized bed reactor venting air and silica powder conveying exhaust air. Usually, fluidized bed reactor venting air has a large dust content, high temperature, and a certain amount of methyl chlorosilane monomer , after being dedusted by the water washing tower, it is emptied, and the exhaust air of the silicon powder is conveyed through the bag filter and then washed and emptied. The emptied gas enters the pool and finally forms a polymer, that is, the dust-containing tail gas hydrolyzed polymer, referred to as the dust-containing tail gas hydrolyzate. [0003] The composition of organosilicon dust-containing tail gas hydrolyzate is complex, usu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/12B09B3/00
Inventor 周欣俊杨庆红孙刚吴连斌祝爱娟
Owner 浙江中天东方氟硅材料股份有限公司
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