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A kind of method that spray method prepares white carbon black slurry

A technology of white carbon black and spray method, which is applied in the direction of silica and silicon oxide, can solve the problems of large carbon dioxide consumption, high reaction efficiency, and long reaction time, and achieve fast reaction speed, simple equipment requirements, and low cost Effect

Active Publication Date: 2015-12-02
安徽进化硅纳米材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the spray reaction tower, the atomizer atomizes the water glass solution into droplets, and then passes through the gas containing carbon dioxide, and the in-situ reaction occurs in the spray drying reaction tower to prepare the silica slurry, thus solving the problem of the traditional carbon dioxide preparation. Long reaction time and large consumption of carbon dioxide in white carbon black
The method of the invention has high reaction efficiency and meets the requirements of environmental protection

Method used

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  • A kind of method that spray method prepares white carbon black slurry

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Comparison scheme
Effect test

Embodiment 1

[0015] Add water to the water glass solution with a modulus of 2.4 to prepare 1000 g of water glass solution with a mass fraction of 11%, add 0.1 g of dodecyltrimethylammonium bromide, and stir for 20 minutes under heating at 70 ° C, with a stirring speed of 100 m / min, fully stirred and passed into the spray reaction tower, the atomized particle size is 15 microns, reacts with the gas containing 50% carbon dioxide (the other 50% is air), the temperature of the spray reaction tower is controlled at 75 ° C, and the reaction is 10s , after fully reacting, the pH value of the product is 8.4, and the solid and liquid are separated to obtain a white carbon black slurry. The finished product of white carbon black is obtained by flash drying, and the performance test of white carbon black is carried out.

Embodiment 2

[0017] Add water to the water glass solution with a modulus of 3.3 to prepare 1000 g of water glass solution with a mass fraction of 10%, add 0.2 g of tetradecyltrimethylammonium bromide, and stir for 30 minutes under heating at 55 ° C, with a stirring speed of 250 m / min, fully stirred and passed into the spray reaction tower, the atomized particle size is 5 microns, reacts with the gas containing 95% carbon dioxide (the other 5% is nitrogen), the temperature of the spray reaction tower is controlled at 85 °C, and the reaction is 2s , after fully reacting, the pH value of the product is 8.1, and the solid and liquid are separated to obtain a white carbon black slurry. The finished product of white carbon black is obtained by spray drying, and the performance test of white carbon black is carried out.

Embodiment 3

[0019] Add water to the water glass solution with a modulus of 2.7 to prepare 1000 g of water glass solution with a mass fraction of 15%, add 0.5 g of hexadecyltrimethylammonium bromide, and stir for 30 minutes under heating at 65 ° C, with a stirring speed of 280 m / min, fully stirred and passed into the spray reaction tower, the atomized particle size is 25 microns, reacts with the gas containing 30% carbon dioxide (the other 70% composition is superheated steam), the temperature of the spray reaction tower is controlled at 45 ℃, the reaction After 40 seconds, the pH value of the product was 8.6 after full reaction, and the solid-liquid separation was performed to obtain a white carbon black slurry. Oven drying is adopted to obtain the finished product of white carbon black, and the performance test of white carbon black is carried out.

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Abstract

The invention relates to a method for preparing white carbon black slurry by using a spraying method. A water glass solution is introduced into a spray reaction tower in a carbon dioxide atmosphere to carry out in-situ reaction, so as to prepare the white carbon black slurry. The method comprises the following steps: evenly mixing a certain modulus of water glass solution containing certain concentration of quaternary ammonium salt at certain temperature under agitation; introducing into a spray drying tower to react with a gas containing certain concentration of carbon dioxide in situ, so as to prepare white carbon black; carrying out solid-liquid separation to obtain the white carbon black slurry. The method disclosed by the invention is simple in equipment demands, quick and efficient in reaction, and friendly to environment; a generated white carbon black product is small in size, and even in size distribution, accords with each performance index of the white carbon black for rubber, and has good economic benefits.

Description

technical field [0001] The invention relates to a method for preparing white carbon black slurry by spraying. The invention adopts the in-situ reaction of the water glass solution and the gas containing carbon dioxide in a spray drying reaction tower to prepare the white carbon black slurry. The method of the invention has high reaction efficiency, fast speed and meets the requirement of environmental protection. Background technique [0002] White carbon black is also known as hydrated silica. At present, the conventional production methods of white carbon black mainly include gas phase method and precipitation method. Precipitated silica is widely used because of its simple production process, low cost and large output. [0003] Precipitated silica refers to sulfuric acid, hydrochloric acid, carbon dioxide and sodium silicate solution as the basic raw materials. The precipitation method used in the traditional white carbon black industry mainly uses sulfuric acid and wat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/12
Inventor 王益庆邓斯奇沈家锋张立群
Owner 安徽进化硅纳米材料科技有限公司