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Method for preparing white carbon black by utilizing water glass with low modulus through carbonizing method of precipitation

A technology of water glass and white carbon black, which is applied in the direction of silicon oxide, silicon dioxide, etc., can solve the problems of low-modulus water glass market application bottlenecks, etc., and achieve the effects of stable product quality, simple equipment, and no harsh process conditions

Inactive Publication Date: 2013-09-11
GUIZHOU PROVINCE PAN COUNTY ZISENYUAN GRP IND DEV INVESTMENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] The purpose of the present invention is to expand the application field of low-modulus water glass, solve the market application bottleneck of low-modulus water glass, and realize the follow-up product processing with low-modulus water glass as raw material

Method used

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  • Method for preparing white carbon black by utilizing water glass with low modulus through carbonizing method of precipitation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Take 500ml of water glass with a modulus of 1.0, dilute the water glass with carbonized filtrate to a mass concentration of 15wt%, take 500g of the diluted solution, add 2.5g of sodium sulfate, 1g of finished white carbon black, transfer it to a 1000ml three-necked bottle, and use The digital display water bath is heated, the thermometer is placed in the three-necked flask, and the temperature is controlled at 95°C. When the temperature rises to the required temperature, start stirring, set the speed at 350rpm, and feed in a gas volume of 10L / min with a carbon dioxide content of 50%. Mixed gas, the pH value at the end of the reaction is 8.5, after the reaction is completed, heat preservation and aging for 2 hours, after filtration, washing, drying, and calcination, the white carbon black product is obtained. After analysis, the product meets the requirements of the HG / T3062-3072-2008 rubber compounding agent standard .

Embodiment 2

[0036] Take 500ml of water glass with a modulus of 1.2, dilute the water glass with carbonized filtrate to a mass concentration of 12wt%, take 500g of the diluted solution, add 2.0g of sodium sulfate, 1.2g of finished white carbon black, and transfer it to a 1000ml three-necked bottle. Heat with a digital display water bath, place a thermometer in a three-necked flask, and control the temperature at 85°C. When the temperature rises to the required temperature, start stirring, set the speed at 350rpm, and feed in a gas volume of 9L / min with a carbon dioxide content of 45 % mixed gas, the pH value at the end of the reaction is 8.5, after the reaction is completed, heat preservation and aging for 2 hours, filter, wash, dry, and calcinate to obtain a white carbon black product. After analysis, the product meets the requirements of the HG / T3062-3072-2008 rubber compounding agent standard .

Embodiment 3

[0038] Take 500ml of water glass with a modulus of 1.5, dilute the water glass with carbonized filtrate to a mass concentration of 10wt%, take 500g of the diluted solution, add 1.5g of sodium sulfate, 1.0g of finished white carbon black, and transfer it to a 1000ml three-necked bottle. Heat with a digital display water bath, place a thermometer in a three-necked flask, and control the temperature at 75°C. When the temperature rises to the required temperature, start stirring, set the speed at 350rpm, and feed in a gas volume of 8L / min with a carbon dioxide content of 40 % mixed gas, the pH value at the end of the reaction is 8.5, after the reaction is completed, keep it warm for 2 hours, filter, wash, dry, and calcinate to obtain a white carbon black product. After analysis, the product meets the rubber compounding agent standard of HG / T3062-3072-2008 Require.

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Abstract

The invention relates to a method for preparing white carbon black by utilizing water glass with low modulus through a carbonizing method of precipitation. The method comprises the following steps: by using water glass as a raw material with the modulus of 1.0-1.5, diluting the raw material by a carbonizing filtrate to a liquor with 10-15wt% of water glass and adding 3.0-3.5wt% of sodium sulfate and 2-3wt% of product white carbon black as a precursor; introducing a mixed gas with content of carbon dioxide of 40-50v% at a flow of 8-10L / min at the carbonizing temperature of 65-95 DEG C, wherein the PH of the carbonizing endpoint is equal to 8.5; insulating and aging the carbonizing liquor for 2 hours and filtering; adequately washing, and drying and calcining to prepare white carbon black. The product is in accordance with the standard request of rubber compound ingredient (HG / T3062-3072-2008). According to the invention, the production path of white carbon black is innovated, the market application problem of water glass with low modulus is solved, and a technical support for comprehensive utilization of industrial wastes such as coal gangue and coal ash is provided, so that the method is beneficial to the development of related industries.

Description

technical field [0001] The invention relates to a method for preparing white carbon black by a low-modulus water glass carbonization precipitation method. Background technique [0002] White carbon black is the general term for white powder amorphous silicic acid and silicate products, mainly refers to precipitated silica, fumed silica, ultrafine silica gel and aerogel, and also includes powdered synthetic silicic acid aluminum and calcium silicate etc. Silica is a porous substance whose composition can be SiO 2 ·nH 2 O represents, where nH 2 O exists in the form of surface hydroxyl groups, soluble in caustic alkali and hydrofluoric acid, insoluble in water, solvents and acids (except hydrofluoric acid), high temperature resistant, non-combustible, tasteless, odorless, and has good electrical insulation , because of its series of advantages, it can be widely used in many fields. [0003] Traditional white carbon black is roughly divided into fumed white carbon black and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/12
Inventor 夏举佩张召述范仲云吕继国范超
Owner GUIZHOU PROVINCE PAN COUNTY ZISENYUAN GRP IND DEV INVESTMENT
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