A kind of preparation method of white carbon black

A white carbon black and water glass solution technology, applied in the direction of silica, silicon oxide, etc., can solve the problems of difficult dispersion and easy agglomeration of silica, and achieve the effect of solving agglomeration, simple equipment requirements, and small size

Active Publication Date: 2015-08-05
安徽进化硅纳米材料科技有限公司
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  • Abstract
  • Description
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Problems solved by technology

This method fundamentally solves the problems that white carbon black is easy to agglomerate and difficult to disperse.

Method used

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  • A kind of preparation method of white carbon black

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add water to the water glass solution with a modulus of 3.8 to prepare 1000 g of water glass solution with a mass fraction of 10%, add 0.2 g of dodecyltrimethylammonium bromide, add 2 g of glutinous rice starch, and stir for 30 minutes under heating at 70 ° C , the stirring rate is 100m / min, and after fully stirring, it is passed into the spray drying tower to react in situ with the gas containing 50% carbon dioxide (the other 50% is air). The inlet temperature of the spray dryer is 300°C, and the outlet temperature is 90°C. The atomized particle size is 5 microns. After spray drying, the finished product of starch-modified silica is carbonized on a curing bed at 200°C. The new silica is mixed with rubber according to the specified formula and vulcanized to measure its mechanical properties.

Embodiment 2

[0028] Add water to the water glass solution with a modulus of 2.4 to prepare 1000 g of water glass solution with a mass fraction of 15%, add 0.5 g of tetradecyltrimethylammonium bromide, add 10 g of cornstarch, and stir at 68 ° C for 30 min , the stirring rate is 150m / min, fully stirred and passed into the spray drying tower to react in situ with the gas containing 20% ​​carbon dioxide (the other 80% is nitrogen), the inlet temperature of the spray dryer is 200°C, the outlet temperature is 70°C, the fog The particle size is 10 microns. After spray drying, the finished product of starch modified silica is obtained. After granulation, it is carbonized on a curing bed at 180°C. The new silica is mixed with rubber according to the specified formula and vulcanized to measure its mechanical properties.

Embodiment 3

[0030] The water glass solution with a modulus of 2.8 was added with water to prepare 1000 g of water glass solution with a mass fraction of 22%, added 1 g of cetyltrimethylammonium bromide, 25 g of tapioca starch, and stirred at 85 ° C for 30 min. The stirring speed is 180m / min. After fully stirring, it is passed into the spray drying tower to react in situ with the gas containing 40% carbon dioxide (the other 60% is air). The inlet temperature of the spray dryer is 500°C, and the outlet temperature is 120°C. The particle size is 30 microns. After spray drying, the starch-modified silica product is obtained. Carbonization is carried out on a drum dryer at 200 ° C. The new silica is mixed with rubber according to the specified formula and vulcanized to measure its mechanical properties.

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Abstract

The invention relates to a preparation method of novel white carbon black. The method comprises the following steps of uniformly stirring a water glass solution with certain modulus as well as quaternary ammonium salt and starch with certain concentration at a certain temperature, reacting with carbon dioxide in situ in a spray-drying tower, spray-drying to obtain finished white carbon black, carbonizing the finished white carbon black at a certain temperature, or granulating and carbonizing. According to the method, the equipment requirement is low, raw materials are simple and easily available, the cost is low, the reaction is quick and efficient, the environment is friendly, and the generated novel white carbon black has unique characteristics, meets the performance indexes of white carbon black for rubber and has relatively good economic benefits.

Description

technical field [0001] The invention relates to a preparation method of novel white carbon black. The present invention adopts the method for in-situ reaction of carbon dioxide and starch-containing water glass solution in the reaction tower of the spray dryer to prepare novel silica, and spray drying directly obtains the novel silica finished product. The method of the present invention responds rapidly, has high efficiency and Meet the needs of energy conservation and environmental protection. Background technique [0002] At present, in the white carbon black industry at home and abroad, the industrial white carbon black preparation processes that have been realized mainly include gas phase method and precipitation method. Usually, the production method of high-quality white carbon black in China mainly uses the gas phase method, but due to the disadvantages of complex process, large investment in equipment, unavailable raw materials, and high cost, the large-scale indus...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/12
Inventor 王益庆沈家锋王虹邓斯奇张立群
Owner 安徽进化硅纳米材料科技有限公司
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