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A kind of method for preparing white carbon black slurry

A white carbon black and slurry technology, applied in the direction of silicon dioxide, silicon oxide, etc., can solve the problems of unsuitable addition of quaternary ammonium salts and molecular weight regulators of quaternary ammonium salts, and achieve good economic benefits, small size, and easy raw materials. the 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

[0008] However, when adding quaternary ammonium salt to the sulfuric acid system, due to the presence of a large amount of H+, the quaternary ammonium salt cannot be used as a molecular weight regulator of silica at all, which means that the sulfuric acid system is not suitable for adding quaternary ammonium salt to prepare white carbon. black

Method used

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  • A kind of method for preparing white carbon black slurry
  • A kind of method for preparing white carbon black slurry
  • A kind of method for preparing white carbon black slurry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 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 15%, add 0.4 g of dodecyltrimethylammonium bromide, and stir for 20 minutes under heating at 70 ° C, with a stirring speed of 100 m After stirring uniformly, carbon dioxide was introduced into the mixture to prepare white carbon black. After fully reacting, the pH value of the product was 8.2. After aging for 2 hours, the white carbon black slurry was obtained by solid-liquid separation. The finished product of white carbon black is obtained by spray drying, and the performance test of white carbon black is carried out.

Embodiment 2

[0026] Add water to the water glass solution with a modulus of 2.8 to prepare 1000g of water glass solution with a mass fraction of 10%, add 0.2g of tetradecyltrimethylammonium bromide, and stir for 20min under heating at 65°C, with a stirring speed of 160m After stirring uniformly, carbon dioxide was introduced to prepare white carbon black. After fully reacting, the pH value of the product was 8.4. After aging for 1 hour, the white carbon black slurry was obtained by solid-liquid separation. The finished product of white carbon black is obtained by flash drying, and the performance test of white carbon black is carried out.

Embodiment 3

[0028] Add water to the water glass solution with a modulus of 3.2 to prepare 1000 g of water glass solution with a mass fraction of 16%, add 0.8 g of hexadecyltrimethylammonium bromide, and stir for 20 minutes under heating at 80 ° C, with a stirring speed of 100 m After 1 / min, carbon dioxide was introduced to prepare white carbon black after uniform stirring, and the pH value of the product after full reaction was 8.5. After aging for 2 hours, the white carbon black slurry was obtained by solid-liquid separation. 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 pulp. The method comprises the following steps: adding a quaternary ammonium salt which accounts for 0.01-0.1% of the mass of a sodium silicate solution into the sodium silicate solution with the modulus of 2.4-3.8 and the mass concentration of 5-25%, introducing carbon dioxide in the stirring speed of 50-300m / min at 40-90 DEG C so as to prepare white carbon black, reducing the pH value to be less than 9, keeping the carbon dioxide atmosphere for being aged for 1-2 hours, and performing solid-liquid separation so as to obtain the white carbon black pulp. The method for preparing the white carbon black pulp has the advantages that the equipment requirements are simple, due to addition of the quaternary ammonium salt, the hydrophobicity of the white carbon black is improved, secondary aggregation of the white carbon black is effectively prevented, the compatibility with rubber is improved, because of the process characteristics, the method is applicable to on-scale industrial production, raw materials are simple and easily available, the price is low, a product is small in size and uniform in distribution, various property indexes of the white carbon black are met, and relatively good economic benefits are met.

Description

technical field [0001] The invention relates to a method for preparing white carbon black slurry. The invention adopts the reaction of carbon dioxide and water glass solution to prepare the white carbon black slurry, and the method of the invention has high reaction efficiency and meets the requirement of environmental protection. technical background [0002] With the introduction of the concept of green tires, people's requirements for tire fillers are also increasing. At present, the requirements for silica as a filler for car tires are getting higher and higher. Conventional methods of producing 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 whit...

Claims

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Application Information

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