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A kind of production method of high anti-yellowing white carbon black

A production method and technology of white carbon black, applied in the direction of silica, silicon oxide, etc., can solve the problems of loss of anti-yellowing, loss of anti-yellowing of additives, and poor anti-yellowing effect, so as to improve whiteness, Excellent anti-yellowing performance and stable product quality

Active Publication Date: 2016-08-24
FUJIAN YUANXIANG CHEM
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  • Abstract
  • Description
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Problems solved by technology

Congenital deficiency, follow-up improvement is only a palliative method, and there are great hidden dangers. According to the particularity of the production process of downstream manufacturers of high-temperature vulcanized silicone rubber and the special environment in which the product is used, the anti-yellowing effect will be poor
The reasons are as follows: 1. Some additives added in the formula of high-temperature vulcanized silicone rubber will react with additives such as anti-yellowing agent, iron remover, and color treatment agent at high temperature or make the anti-yellowing agent, iron remover, and color treatment agent Second, the white carbon black treated with additives such as anti-yellowing agent and iron remover is manufactured into products, which are exposed to harsh external environments for a long time, such as ultraviolet rays, high temperature, oxygen in the air, water, etc. Under the complex action of steam, the additive will lose its anti-yellowing effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0024] The preparation principle of the present invention is as follows:

[0025] Use strong acid type cation exchange resin and water glass for replacement reaction, remove positive metal ions in water glass, minimize the content of non-ferrous metal ions in water glass, so as to obtain pure sodium silicate solution; use high-purity liquid Ammonia or ammonia gas is prepared into a pure ammonia solution; production water includes preparation water, reaction water, and washing water, all of which are tap water treated by RO membrane reverse osmosis equipment. RO membrane reverse osmosis equipment can effectively remove non-ferrous metal ions, Minerals, organic matter, microorganisms, etc., to obtain pure water. The production raw materials treated by the above method can minimize the content of non-ferrous metals in the production raw materials of white carbon black, and avoid the introduction of other impurities or non-ferrous metals in the production process, thus fundamental...

Embodiment 1

[0037] 1. Production raw material preparation

[0038] 1.1, SiO 2 Content is the preparation of the sodium silicate solution of 3wt%

[0039] Put the high-quality low-iron solid water glass with a modulus of 2.5 to 3.5 into the roller steaming ball, add pure water into the roller steaming ball and pass in the water vapor treated by the precision filter, pressurize to 0.6~0.8MPa, Hold the pressure for 1 to 3 hours to obtain SiO 2 Concentrated water glass with a content of 10wt%, and then adding pure water to the concentrated water glass to prepare SiO 2 Dilute water glass with a content of 3wt%, the prepared dilute water glass is then filtered through a precision filter to obtain water glass with a transparency greater than 200mm, and the water glass is transported to the high-level tank by a pump, and flows through the high-level difference to the water glass filled with 001×7 strong acid Ion exchange is carried out in the exchange column of the type cation exchange resin, ...

Embodiment 2

[0047] 1. Production raw material preparation

[0048] 1.1, SiO 2 Content is the preparation of the sodium silicate solution of 5wt%

[0049] Put high-quality low-iron solid water glass with a modulus of 2.5 to 3.5 into the roller steaming ball, add pure water into the roller steaming ball and pass in steam treated by a precision filter, pressurize to 0.6~0.8MPa, Hold the pressure for 1 to 3 hours to obtain SiO 2 Concentrated water glass with a content of 15wt%, and then adding pure water to the concentrated water glass to prepare SiO 2 Dilute water glass with a content of 5wt%, the prepared dilute water glass is then filtered through a precision filter to obtain water glass with a transparency greater than 200mm, and the water glass is pumped to the high-level tank, and flows through the high-level difference to the water glass filled with 001×7 strong acid Ion exchange is carried out in the exchange column of the type cation exchange resin, and the inside of the exchange ...

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Abstract

The invention relates to a production method of highly anti-yellowing white carbon black, aiming to solve the technical problem of poor anti-yellowing effect of existing white carbon black, including: ion-exchanging water glass through a strong-acid cation exchange resin to obtain silica Sodium silicate solution; liquid ammonia or ammonia gas and pure water are prepared into ammonia solution; concentrated sulfuric acid and pure water are prepared into dilute sulfuric acid solution; the sodium silicate solution, ammonia solution, dilute sulfuric acid solution and pure water are mixed for reaction Press-filter the reacted product, wash the filter cake with pure water, and then process the filtrate obtained from the press-filter and wash through pulping, refining, spray-drying and crushing to obtain white carbon black. The white carbon black produced by the method of the present invention only contains a very small amount of non-ferrous metal impurities, especially the content of iron metal can be reduced to 10-20ppm, which fundamentally solves the problem of easy yellowing of white carbon black when it is used to produce silicone rubber technical problems, the product quality is stable, and the anti-yellowing performance is excellent.

Description

technical field [0001] The invention relates to the technical field of white carbon black production, in particular to a production method of high-yellowing white carbon black used for producing silicone rubber. Background technique [0002] At present, the production technology of white carbon black with high anti-yellowing is to add anti-yellowing agent (such as antioxidant), iron remover (such as complexing agent), color treatment agent (such as blue dye, etc.) after the production of white carbon black. Color masking method) and other post-processing agents. Congenital deficiency, follow-up improvement is only a palliative method, and there are great hidden dangers. According to the particularity of the production process of downstream manufacturers of high-temperature vulcanized silicone rubber and the special environment in which the product is used, the anti-yellowing effect will be poor. The reasons are as follows: 1. Some additives added in the formula of high-temp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/12
Inventor 王承辉汤晓剑王升锦李建华麻煜晶
Owner FUJIAN YUANXIANG CHEM
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