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A kind of catalytic regeneration method of pyrolysis carbon black

A carbon black and catalyst technology, applied in the field of rubber reinforcement, can solve the problems of affecting the reinforcement performance, reducing the surface activity and structural degree of cracked carbon black, and achieving the effects of promoting decomposition, shortening activation time, and improving activation efficiency

Active Publication Date: 2022-04-22
CHINA CHEM GUILIN ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the low ash content (less than 0.7%) of commercial carbon black, the ash content in pyrolysis carbon black is obviously much higher, generally between 17%-19%. The presence of a large amount of ash leads to the surface activity and The degree of structure is greatly reduced, which in turn affects its reinforcement performance

Method used

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  • A kind of catalytic regeneration method of pyrolysis carbon black
  • A kind of catalytic regeneration method of pyrolysis carbon black

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Acid solution treatment: Weigh 3kg of pyrolysis carbon black in a 50L reaction kettle, add a total acidity of 5mol L -1 30L of mixed acid solution of hydrochloric acid and hydrofluoric acid, wherein the molar ratio of hydrochloric acid to hydrofluoric acid is 1:1, the temperature is 60°C, the treatment time is 4h, and the stirring speed is 800rpm;

[0038] (2) Grinding treatment: after acid solution treatment and reaction, filter, wash, dry, and then grind through a homogenizer, and the particle size after grinding is 300 mesh;

[0039] (3) Activation treatment: add ferric chloride to the pyrolysis carbon black after grinding, the ferric chloride add-on is 0.5% of the total mass of pyrolysis carbon black, then transfer to nickel box, be placed in the atmosphere furnace of 400 ℃ rapidly, Introduce oxygen, the oxygen flow rate is set to 0.2L s -1 , and adjust the absolute pressure in the furnace to 10 2 Pa, take out after activation for 120min;

[0040] (4) Cooling...

Embodiment 2-8

[0043] The method is the same as in Example 1, the differences are shown in Table 1, and the performance data of the obtained regenerated carbon black are shown in Table 2.

Embodiment 9

[0045] The same method as in Example 1, except that the cracked carbon black is not subjected to step (1) acid treatment, and the performance data of the obtained regenerated carbon black are shown in Table 2.

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Abstract

The invention discloses a method for catalytic regeneration of cracked carbon black, which comprises the following steps: a. The cracked carbon black is subjected to catalytic heating and activation treatment, and the catalyst is selected from ferric chloride, cobalt chloride, nickel chloride, copper sulfate, At least one of the zinc chlorides to obtain activated pyrolysis carbon black; b, cooling the pyrolysis carbon black obtained in step a to obtain regenerated carbon black. In the regeneration method of pyrolysis carbon black of the present invention, a metal salt catalyst is added during the activation process, which can lower the activation temperature and shorten the activation time, so that the pyrolysis carbon black can be activated under milder conditions, and the colloidal layer on the surface of the pyrolysis carbon black can be removed. , increase active sites, can be reused in rubber, and realize the recycling of solid waste resources.

Description

technical field [0001] The invention belongs to the technical field of rubber reinforcement, and in particular relates to a catalytic regeneration method for cracking carbon black. Background technique [0002] The rapid development of my country's automobile industry has led to the rapid rise of the rubber tire industry, but at the same time it has also produced a large number of waste tires. If the disposal of waste tires is not timely, it will cause serious waste of land resources, and it is easy to cause fires and mosquito breeding. Water pollution and other issues have caused the deterioration of the ecological environment. At present, pyrolysis technology is one of the most promising ways to deal with waste tires, and pyrolysis carbon black as one of its by-products is also a product with high potential value. Due to the wide particle size distribution, high ash content, poor surface activity, and low structure of pyrolysis carbon black, the effect is not ideal when it...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/56C08K9/00C08K3/04C08L21/00
CPCC09C1/56C09C1/565C08K9/00C08K3/04C08L21/00Y02P20/584
Inventor 潘军青邓文忠蒋国赛张彤孙艳芝杨渊郭俊黄传锦陆慧玲车凯林子杨
Owner CHINA CHEM GUILIN ENG