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Oxidizing and granulating device for pigment carbon black and pigment carbon black prepared by same

A technology of pigment carbon black and granulation device, applied in the direction of fibrous fillers, etc., can solve the problems of aggravating the degree of dust pollution, difficult to paint, ink, powdery carbon black, etc. , The effect of easy dispersion processing

Active Publication Date: 2015-06-03
安徽黑猫新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The third is the problem of dust pollution
[0011] Powdered carbon black has a small specific gravity and is easy to fly. When using powdered carbon black to produce coatings, inks, and plastic products, the feeding process will easily cause carbon black dust pollution.
[0012] The common effective way to solve carbon black dust pollution is to granulate carbon black, but excessive or inappropriate granulation also increases the difficulty of dispersing carbon black in polymer materials, for example, wet granulated rubber carbon black is due to Contains additives such as molasses and dextrin, and the carbon black particles are hard, so it is difficult to apply to the production of coatings and inks. Manufacturers are often used to using powdered pigment carbon black products, which increases the degree of dust pollution

Method used

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  • Oxidizing and granulating device for pigment carbon black and pigment carbon black prepared by same
  • Oxidizing and granulating device for pigment carbon black and pigment carbon black prepared by same
  • Oxidizing and granulating device for pigment carbon black and pigment carbon black prepared by same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] use as Figure 5 In the process flow shown, a certain powdery pigment carbon black is used as a raw material, and only a primary oxidation-granulator is used to oxidize and granulate the carbon black with hydrogen peroxide as an oxidant, and then dry to obtain the product.

[0054] In the first-stage oxidation-granulator, the concentration of hydrogen peroxide is 20%, and the amount of hydrogen peroxide added is 1:1 of hydrogen peroxide to carbon black; the hydrogen peroxide is sprayed vertically by the water pump through 6 water nozzles distributed in front of the oxidation-granulator into the oxidation granulator; the injection pressure is 0.5 MPa; the rotating speed of the granulator is 460r / min; in order to facilitate granulation, steam is passed into the interlayer of the primary oxidation-granulator, and the pressure of the steam is 0.8MPa, so that The temperature inside the shell in the oxidation granulator reaches 60-70°C, the powdery carbon black enters the she...

Embodiment 2

[0063] use as Figure 6 The technological process shown, with the same powdery pigment carbon black of embodiment one as raw material, at first with hydrogen peroxide as oxidant, use primary oxidation-granulator to carry out oxidative treatment to carbon black, then use ozone as oxidant, use two The advanced oxidation-granulator is used to oxidize the carbon black and then dry it to obtain the product.

[0064] In the first-stage oxidation-granulator, the concentration of hydrogen peroxide is 20%, and the amount of hydrogen peroxide added is 1:1 of hydrogen peroxide to carbon black; the hydrogen peroxide is sprayed vertically by the water pump through 6 water nozzles distributed in front of the oxidation-granulator into the oxidation granulator; the injection pressure is 0.5 MPa; the rotating speed of the granulator is 460r / min; in order to facilitate granulation, steam is passed into the interlayer of the primary oxidation-granulator, and the pressure of the steam is 0.8MPa, ...

Embodiment 3

[0074] use as Figure 7 The process flow shown, using another granular commercial pigment carbon black as raw material, does not use the primary oxidation-granulator, does not use the rotary dryer, only uses the secondary oxidation-granulator to carry out the granular commercial carbon black post-oxidation treatment.

[0075] Secondary oxidation - the production capacity of the granulator is 800kg / h, the rotational speed of the granulator is 300 r / min, and a large-scale ozone generator is selected, the concentration of ozone produced by it is 20-30mg / l, and the gas supply volume is 105- 155Nm3 / h, ozone enters through the intake chamber, and exhaust gas is discharged from the exhaust gas exhaust chamber.

[0076] Table 3 Comparison table of the results of different oxidation treatments for another pigment carbon black

[0077]

[0078] From the comparison results in the table above, it can be seen that after the pigment carbon black is oxidized by ozone, the pH decreases, ...

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Abstract

The invention discloses an oxidizing and granulating device for a pigment carbon black. The device is composed of a primary oxidizing granulator, a secondary oxidizing granulator and a rotary dryer. The pigment carbon black is prepared by the following steps: by taking the powdered pigment carbon black as a raw material, performing online wet granulation, simultaneously performing continuous wet oxidization on the carbon black, and drying to obtain the powdered, granulated and oxidized pigment carbon black product with high methylbenzene luminousness; or the pigment carbon black is prepared by the following steps: independently using the secondary oxidizing granulator provided by the device, and by taking an ozone as an oxidant and taking granular carbon black as a raw material, performing dry oxidization on the carbon black. The device can be flexibly matched to produce the oxidized carbon black product in different degrees. The invention additionally discloses a pigment carbon black product produced by the device. The pigment carbon black is powdered and granulated and the methylbenzene luminousness is high.

Description

technical field [0001] The invention relates to a pigment carbon black oxidation-granulation device, which belongs to the production field of pigment carbon black, and also relates to the pigment carbon black produced by the device. Background technique [0002] Carbon black is produced by incomplete combustion or cracking of hydrocarbon substances (solid, liquid or gaseous). 90% of the carbon black produced in the world is used as a reinforcing agent in the rubber field, and less than 10% of the carbon black is used as a coloring pigment in coatings, inks and plastics. As a black pigment, carbon black has excellent blackness, high temperature resistance, good light resistance, good chemical stability, and low price. It is a widely used black pigment. [0003] In the process of using pigment carbon black, it is often necessary to face three problems: [0004] The first is the problem that carbon black is difficult to disperse. [0005] The reason why carbon black is diffi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/56
Inventor 周锋锐吴磊朱子洋吴葆松
Owner 安徽黑猫新材料有限公司
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