Method for preparing white carbon black

A technology of silica and dissolving device, applied in the field of silica technology, can solve the problems of low yield of silica, high cost of wastewater treatment, difficult treatment, etc., to overcome uneven heating, improve aging process, enhance Effect of BET specific surface area

Active Publication Date: 2018-09-28
蚌埠市万科硅材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] What this application intends to solve is to provide a white carbon black preparation method to solve the problems of low yield and high pollution rate of white carbon black prepared by precipitation method in t

Method used

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  • Method for preparing white carbon black

Examples

Experimental program
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Embodiment 1

[0052] A preparation method of white carbon black, comprising the following steps:

[0053] S1: Add solid sodium silicate to the dissolving device, add water and seal the dissolving device, feed steam until the steam pressure in the dissolving device reaches 120 cm mercury column, and stop when all the sodium silicate is dissolved, forming a specific gravity of 1.37 g / cm 3 dilute sodium silicate solution, and put the above dilute sodium silicate solution into the reactor;

[0054] S2: Slowly transport 98% concentrated sulfuric acid through the pipeline to the dilution tank for dilution to form a specific gravity of 1.27g / cm 3 dilute sulfuric acid, the dilute sulfuric acid formed above 3 / h transported to the reaction kettle, and mixed and stirred when the reaction temperature was controlled at 31°C until the pH of the solution in the reaction kettle reached 7, left to stand for 2 hours to age and generate crystal seeds, and then stirred to form a mixed solution;

[0055] S3...

Embodiment 2

[0060] The content of this embodiment is basically the same as that of Example 1, and the similarities will not be repeated. The difference is that in step S1, solid sodium silicate is added to the dissolving device, water is added and the dissolving device is sealed, and the Steam until the steam pressure in the dissolving device reaches 125cm Hg and stop. After all the sodium silicate is dissolved, the specific gravity is 1.37g / cm 3 dilute sodium silicate solution, and put the dilute sodium silicate solution into the reaction kettle.

Embodiment 3

[0062] The content of this embodiment is basically the same as that of Example 1, and the similarities will not be repeated. The difference is that in step S1, solid sodium silicate is added to the dissolving device, water is added and the dissolving device is sealed, and the Steam until the steam pressure in the dissolving device reaches 150cm Hg and stop, after all the sodium silicate is dissolved, the specific gravity is 1.37g / cm 3 dilute sodium silicate solution, and put the dilute sodium silicate solution into the reaction kettle.

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Abstract

The invention relates to the technical field of white carbon black processes and particularly relates to a method for preparing white carbon black. The method comprises the following steps: S1, addingsolid sodium silicate into dissolving equipment, adding water and sealing the dissolving equipment; introducing steam, stopping introduction when a steam pressure in the dissolving equipment reaches120-150cm mercury column, and forming a dilute sodium silicate solution having specific gravity of 1.36-1.38g/cm<3> after the total sodium silicate is dissolved, and adding the dilute sodium silicatesolution into the reactor. Therefore, according to the method for preparing white carbon black provided by the invention, the solid sodium silicate is added into the dissolving equipment, the water isadded, the dissolving equipment is sealed, the steam is introduced to reach the steam pressure in the dissolving equipment, the introduced steam is capable of accelerating dissolution of the solid sodium silicate, and when the introduction pressure value is 120-150cm, heating of the solid sodium silicate can be accelerated, the molecular activity is improved, and the dissolving cycle is shortened.

Description

Technical field: [0001] The invention relates to the technical field of white carbon black, in particular to a preparation method of white carbon black. Background technique: [0002] Silica is an important reinforcing material in the rubber industry. Because of its similar microstructure and aggregate morphology to carbon black and similar reinforcing properties in rubber, it is called silica. First generation silica is the traditional or "standard" variety of silica. The second generation is called "high-performance reinforcing silica", namely Hengsil-988 high-performance reinforcing silica, which is a new type of reinforcing material suitable for green tires with high dispersion. Energy saving and environmental protection are two major themes in today's society. [0003] In the process of preparing white carbon black by precipitation method in the prior art, the production cost is relatively high, which is mainly reflected in the treatment cost of waste water. Direct di...

Claims

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Application Information

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IPC IPC(8): C01B33/193
CPCC01B33/193C01P2006/12C01P2006/80
Inventor 陈君华杨万科周丽李启明郭雨杨妍杨河
Owner 蚌埠市万科硅材料科技有限公司
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