Production technology of white microbead-shaped white carbon black

A production process, white carbon black technology, applied in the direction of silica, silicon oxide, etc., can solve the problems of high cost, easy scattering, environmental pollution, etc., and achieve the effect of uniform and easy dispersion of particles, thorough drying, and good dispersibility

Active Publication Date: 2010-07-28
WUXI HENGCHENG SILICON IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The most important methods of producing white carbon black are precipitation method and gas phase method. The gas phase method is rarely used because of the complicated process and high cost. The traditional precipitation method with sodium silicate and sulfuric acid as the main raw materials mainly uses centrifugal drying equipment. The obtained product is in the form of powder, which is easily scattered during use and causes great pollution to the environment
Granulated briquetting can effectively solve the problem of powder scattering, but the dispersibility of granulated products is poor, which is not conducive to the full play of its excellent reinforcing and filling effect of silica

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Solid sodium silicate (Na 2 O nSiO 2 ) and water are added into the dissolving drum according to the mass ratio of 2:1, clean hot air is introduced, fully dissolved under the pressure of 0.4-0.8Mpa for 2-3 hours, and the transparent and impurity-free liquid water glass is obtained after filtering out the precipitate , where Na 2 O nSiO 2 The Baume degree (15.6°C) is 30-38°Bé;

[0020] (2) add the water of its quality 1 / 4~1 / 8 in the liquid water glass of step (1), to adjust wherein Na 2 O nSiO 2 Baume degree (15.6 ℃) to 20 ~ 30 ° Bé;

[0021] (3) the liquid water glass adjusted in the step (2) and the concentrated sulfuric acid that concentration is 98% are added in the synthetic reactor simultaneously according to the volume ratio of 15: 1, reacted 90 minutes at the temperature of 80 ℃~98 ℃, During the reaction process, ensure that Na in the reactor 2 The residual normality of O is 7.0 ± 0.5, and 98% concentrated sulfuric acid is added dropwise to adjust the ...

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Abstract

The invention relates to a production technology of a white microbead-shaped white carbon black. In the production technology, sodium silicate or concentrated sulfuric acid are used as the main raw materials and the steps such as dissolution, synthesis, filter pressing, slurrying, drying and the like are employed; in particular, in the process of drying, the pressure type drying technology and the fluidized bed drying technology are employed, so that the microbead-shaped white carbon black which is environment-friendly and extremely easily dispersive is obtained.

Description

technical field [0001] The invention relates to a production process of white carbon black, in particular to a production process of white microbead-shaped white carbon black. Background technique [0002] The chemical name of silica is hydrated amorphous silicon dioxide with the molecular formula SiO 2 ·nH 2 O, is a kind of reinforcing filler widely used in rubber and plastic industry. It has many advantages such as porous, large specific surface area, strong water absorption, high temperature resistance, and good electrical insulation. The most important methods of producing white carbon black are precipitation method and gas phase method. The gas phase method is rarely used because of the complicated process and high cost. The traditional precipitation method with sodium silicate and sulfuric acid as the main raw materials mainly uses centrifugal drying equipment. The obtained product is in the form of powder, which is easily scattered during use and causes great pollut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/12
Inventor 陈南飞
Owner WUXI HENGCHENG SILICON IND CO LTD
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