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Regeneration method of cracked carbon black

A carbon black and regenerated carbon black technology, applied in fibrous fillers and other directions, can solve the problem of low reinforcement effect of cracked carbon black, and achieve the effect of shortening activation time, improving reinforcement performance and maintaining activity.

Pending Publication Date: 2021-11-16
CHINA CHEM GUILIN ENG +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the other hand, the reinforcing effect of pyrolysis carbon black produced by waste tires is far lower than that of commercial carbon black, so that the proportion of it replacing commercial carbon black in rubber is low. Therefore, how to improve the activity of recycled carbon black is a realistic waste tire resource. The key to the utilization of

Method used

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  • Regeneration method of cracked carbon black
  • Regeneration method of cracked carbon black

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (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;

[0035] (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;

[0036] (3) Activation treatment: seal the cracked carbon black after grinding into a nickel box, then quickly place it in an atmosphere furnace at 600°C, and adjust the absolute pressure in the furnace to 10 through a pressure relief valve. -1 Pa, take out after activating for 10 minutes;

[0037] (4) Cooling treatment: Spray water mist to the pyrolysis carbon black activated in step (3) to make it rapidly drop to room temperature, and the...

Embodiment 2-3

[0040] The method is the same as in Example 1, except that the absolute pressure, activation temperature and time are different, see Table 1 for details, and see Table 2 for the performance data of the obtained regenerated carbon black.

Embodiment 4

[0042] The same as the method of Example 1, the difference is that the atmosphere furnace atmosphere is an oxidizing atmosphere in the step (3), and the feeding flow rate is 0.05L·s -1 air, the activation time is 8 minutes, and the performance data of the obtained regenerated carbon black are shown in Table 2.

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Abstract

The invention discloses a regeneration method of of cracked carbon black. The method comprises: a, carrying out heating activation treatment on pyrolysis carbon black in a vacuum environment to obtain activated pyrolysis carbon black; and b, cooling the cracked carbon black obtained in the step a to obtain regenerated carbon black. In the step a, the absolute pressure of the vacuum environment is 10<4> to 10 <-1 > Pa, the activation temperature is 300 to 930 DEG C, and the activation time is 0.1 to 200 minutes; and in the step b, the cooling speed is 10-1000 DEG C min <-1 >, and the temperature is reduced to 0-450 DEG C. According to the regeneration method of the cracked carbon black, the regenerated carbon black is subjected to vacuum activation treatment, so that organic macromolecules on the surface of the carbon black are quickly decomposed under vacuum, and the temperature and time required by the decomposition process are reduced, so that the activity of the cracked carbon black is fully reserved, and the regenerated carbon black obtained after regeneration treatment has excellent performance, and can be recycled in rubber, and further the recycling of solid waste resources is realized.

Description

technical field [0001] The invention belongs to the technical field of rubber reinforcement, and in particular relates to a method for regenerating cracked carbon black. Background technique [0002] At present, the number of waste tires is increasing year by year, and random disposal will cause serious environmental pollution. This is another major "black pollution" after "white pollution" plastics. According to statistics, the output of waste tires in my country has reached 330 million in 2019, exceeding 10 million tons, and will continue to grow at a rate of about 8% in the future. Such a high output of waste tires has formed a huge emerging market. , the number of relevant enterprises has reached 1,500, which can realize the recycling and reuse of 200 million waste tires, with a recycling rate of 61%. While creating economic benefits, it also plays a positive role in improving the ecological environment. It is worth noting that there are many forms of waste tire recyclin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/48C08K9/00C08K9/02C08K3/04
CPCC09C1/48C08K9/00C08K9/02C08K3/04
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