阅读说明：本技术 一种绿色轮胎用白炭黑的制备方法 (Preparation method of white carbon black for green tire ) 是由 王永庆 马加佳 阙伟东 于 2020-07-03 设计创作，主要内容包括：本发明公开了一种绿色轮胎用白炭黑的制备方法。该方法包括(1)向液体硅酸钠中加酸,至pH值达到8～9；(2)步骤(1)加完酸后,立即用乙醇水溶液稀释；(3)向稀释后的反应液中继续加酸,至pH值呈酸性,陈化,得到所述白炭黑。与现有沉淀法相比,本发明方法可以提高白炭黑的吸油性能和比表面积,并改善橡胶的加工性能和力学性能。(The invention discloses a preparation method of white carbon black for green tires. The method comprises (1) adding acid into liquid sodium silicate until pH value reaches 8-9; (2) immediately diluting the solution with ethanol water after the acid is added in the step (1); (3) and continuously adding acid into the diluted reaction liquid until the pH value is acidic, and aging to obtain the white carbon black. Compared with the existing precipitation method, the method provided by the invention can improve the oil absorption performance and the specific surface area of the white carbon black, and improve the processability and the mechanical property of the rubber.)

1. A preparation method of white carbon black for green tires is characterized by comprising the following steps: the method comprises the following steps:

(1) adding acid into the liquid sodium silicate until the pH value reaches 8-9;

(2) immediately diluting the solution with ethanol water after the acid is added in the step (1);

(3) and continuously adding acid into the diluted reaction liquid until the pH value is acidic, and aging to obtain the white carbon black.

2. The method of claim 1, wherein: in the step (1), the Baume degree of the liquid sodium silicate is 45-50.

3. The production method according to claim 1 or 2, characterized in that: in the step (1), when acid is added into the liquid sodium silicate, the stirring speed is 150-200 r/min.

4. The method of claim 1, wherein: in the step (2), the dilution times are 1.5-3 times.

5. The method of claim 4, wherein: the dilution factor was 2-fold.

6. The method of claim 1, wherein: in the step (2), the concentration of the ethanol water solution is 0.5-5 vt%.

7. The method of claim 6, wherein: the concentration of the ethanol water solution is 1-2 vt%.

8. The method of claim 1, wherein: in the step (1) and/or the step (2), the acid is sulfuric acid, and preferably, the sulfuric acid is a 30-40 wt% sulfuric acid aqueous solution.

9. The method of claim 1, wherein: in the step (2), acid is continuously added into the diluted reaction liquid until the pH value reaches 3-5.

10. The method of claim 1, wherein: the aging time is 0.5-2 hours.

Technical Field

The invention relates to a preparation method of white carbon black for green tires.

Background

During the running of the automobile, energy is consumed by various resistances, wherein about 20% of gasoline is consumed by the rolling resistance of the tires. The green tire can reduce the rolling resistance by 20 percent compared with the common tire, reduce the oil consumption by more than 5 percent, effectively reduce the fuel consumption of the automobile, enhance the use efficiency of the fuel and reduce the emission of carbon dioxide under the condition of not losing the basic safety performance of the tire.

Disclosure of Invention

The invention aims to provide a preparation method of white carbon black for green tires.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a preparation method of white carbon black for green tires is characterized by comprising the following steps: the method comprises the following steps:

(1) adding acid into the liquid sodium silicate until the pH value reaches 8-9;

(2) immediately diluting the solution with ethanol water after the acid is added in the step (1);

(3) and continuously adding acid into the diluted reaction liquid until the pH value is acidic, and aging to obtain the white carbon black.

Preferably, in the step (1), the Baume degree of the liquid sodium silicate is 45-50.

Preferably, the modulus of the sodium silicate is 2.5-3.5.

Preferably, in the step (1), when the acid is added into the liquid sodium silicate, the stirring speed is 150-200 r/min.

Preferably, in the step (2), the dilution time is 1.5-3 times.

More preferably, the dilution factor is 2-fold.

Preferably, in the step (2), the concentration of the ethanol aqueous solution is 0.5-5 vt%.

More preferably, the concentration of the ethanol water solution is 1-2 vt%.

Preferably, in step (1) and/or step (2), the acid is sulfuric acid.

More preferably, the sulfuric acid is a 30-40 wt% sulfuric acid aqueous solution.

Preferably, in the step (2), acid is continuously added into the diluted reaction solution until the pH value reaches 3-5.

Preferably, the aging time is 0.5 to 2 hours.

The aged slurry can be subjected to conventional filter pressing, washing and drying treatment to obtain the dry white carbon black.

Compared with the existing precipitation method, the method provided by the invention can improve the oil absorption performance and the specific surface area of the white carbon black, and improve the processability and the mechanical property of the rubber. The prepared white carbon black can be used as a reinforcing agent for green tires to reduce the resistance of the tires.

Detailed Description

The technical solution of the present invention will be described in further detail with reference to preferred embodiments of the present invention.