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Method for preparing reinforced white carbon black

A white carbon black and reinforcement technology, applied in the direction of silica, silica, etc., can solve the problems of low performance parameters such as tensile strength, tear strength, constant elongation, gravity and elongation at break.

Active Publication Date: 2008-12-31
WUXI HENGHENG SILICA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The current method for preparing white carbon black is to react under heating conditions with concentrated sulfuric acid and sodium silicate, and then to obtain finished products through processes such as precipitation, filtration and drying. Performance parameters such as strength, constant tensile force and elongation at break are low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (a) Use a specific gravity of 1.010g / cm 3 The dilute sodium silicate solution is added in the reactor;

[0024] (b) Set the specific gravity to 1.100g / cm 3 Sulfuric acid at 9.0m 3 The flow rate of / h is added in the dilute sodium silicate solution of step a, when the pH of the solution in the reactor reaches 6.0, the reaction ends;

[0025] (c) leave the mixed reaction solution after step b reaction in the reactor for 3 hours, make it age, and generate crystal seeds;

[0026] (d) stirring the mixed reaction solution in the reaction kettle after step c aging evenly for subsequent use;

[0027] (e) Pass high-temperature water vapor into the mixed solution of step d for heating, when the temperature of the solution in the reactor is heated to 70°C, stop feeding high-temperature water vapor, and add a specific gravity of 1.180g / cm 3 dilute sodium silicate, when the pH of the solution in the reactor was 11.0, stop adding dilute sodium silicate;

[0028] (f) Pass high-te...

Embodiment 2

[0033] (a) Use a specific gravity of 1.020g / cm 3 The dilute sodium silicate solution is added in the reactor;

[0034] (b) Set the specific gravity to 1.300g / cm 3 Sulfuric acid at 12.0m 3 The flow rate of / h is added in the dilute sodium silicate solution of step a, when the solution pH in the reactor reaches 7.5, the reaction ends;

[0035] (c) leave the mixed reaction solution after the step b reaction in the reactor for 10 hours, make it age, and generate crystal seeds;

[0036] (d) stirring the mixed reaction solution in the reaction kettle after step c aging evenly for subsequent use;

[0037] (e) Pass high-temperature water vapor into the mixed solution of step d for heating, when the temperature of the solution in the reactor is heated to 80°C, stop feeding high-temperature water vapor, and add a specific gravity of 1.300g / cm 3 dilute sodium silicate, when the solution pH in the reactor was 11.5, stop adding dilute sodium silicate;

[0038] (f) Pass high-temperatur...

Embodiment 3

[0043] (a) Use a specific gravity of 1.015g / cm 3 The dilute sodium silicate solution is added in the reactor;

[0044] (b) Set the specific gravity to 1.200g / cm 3 Sulfuric acid at 11.0m 3 The flow rate of / h is added in the dilute sodium silicate solution of step a, when the solution pH in the reactor reaches 6.8, the reaction ends;

[0045] (c) leave the mixed reaction solution after the step b reaction in the reactor for 7 hours, make it age, and generate crystal seeds;

[0046] (d) stirring the mixed reaction solution in the reaction kettle after step c aging evenly for subsequent use;

[0047] (e) Pass high-temperature water vapor into the mixed solution of step d for heating, when the temperature of the solution in the reactor is heated to 75°C, stop feeding high-temperature water vapor, and add a specific gravity of 1.240g / cm 3 dilute sodium silicate, when the solution pH in the reactor was 11.3, stop adding dilute sodium silicate;

[0048](f) Pass high-temperature ...

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Abstract

The invention relates to a preparation method of white carbon black of an important reinforcing material in the rubber industry; the preparation method includes the following steps: (a) diluted sodium silicate solution is added in a reaction kettle; (b) sulphuric acid is added in the diluted sodium silicate solution for reaction; (c) after reaction, the mixed solution stands still and is aged to generate seed crystal; (d) the aged mixed solution is evenly stirred; (e) hot water vapor is pumped into the mixed solution for heating until the temperature of the solution raises to 70-80 DEG C, and diluted sodium silicate is added in till the pH value of the solution reaches 11.0-11.5; (f) hot water vapor is pumped in the solution in the reaction kettle for heating and is cut off when the temperature of the solution raises to 86-95 DEG C and then sulphuric acid is added in the solution; (g) precipitate is separated out when the pH value of the solution reaches 3.0-5.0; (h) the precipitate is filtered, pulped and dried to form finished products. The properties of the white carbon black prepared by the method such as tensile-strength, tear strength, stretching stress, elongation at break, and the like, are all improved.

Description

technical field [0001] The invention relates to a preparation method of white carbon black, an important reinforcing material in the rubber industry. 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. [0003] Precipitated silica, as a rubber raw material, is mainly used in tires, footwear and other light-colored rubber products. In the tire industry, silica was mainly used in the belt layer of radial tires in the past to enhance the adhesion between steel wire and rubber. Some tire companies a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/12C08K3/36C08L21/00
Inventor 陈尧祥
Owner WUXI HENGHENG SILICA
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