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Method for preparing white carbon black through one-step method

A technology of white carbon black and step method, applied in the direction of silica, silicon oxide, etc., can solve the problems of uneven dispersion, white carbon black containing gel, etc., and achieve the effect of uniform distribution, simple equipment requirements, and good economic benefits

Active Publication Date: 2014-07-23
安徽进化硅纳米材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method fundamentally solves the industry problems that plague silica - silica gel, uneven dispersion, etc.

Method used

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  • Method for preparing white carbon black through one-step method
  • Method for preparing white carbon black through one-step method
  • Method for preparing white carbon black through one-step method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Add water to the water glass solution with a modulus of 2.8 to prepare 1000g of water glass solution with a mass fraction of 10%, add 0.3g of dodecyltrimethylammonium bromide, and stir for 20min under heating at 70°C, with a stirring speed of 100m / min, 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 200°C, the outlet temperature is 70°C, and the atomized particle size is 5 microns, the finished product of silica was obtained after spray drying, and performance testing was carried out.

Embodiment 2

[0035] Add water to the water glass solution with a modulus of 3.4 to prepare 1000 g of water glass solution with a mass fraction of 15%, add 0.5 g of tetradecyltrimethylammonium bromide, and stir under heating at 45 ° C

[0036] 20min, 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 superheated steam), the inlet temperature of the spray dryer is 300°C, and the outlet temperature is 90°C. The atomized particle size is 10 microns, and the finished product of white carbon black is obtained after spray drying, and the performance test is carried out.

Embodiment 3

[0038] Add water to the water glass solution with a modulus of 2.6 to prepare 1000 g of water glass solution with a mass fraction of 11%, add 0.3 g of hexadecyltrimethylammonium bromide, and stir for 30 minutes under heating at 75 ° C, with a stirring speed of 180 m / min, fully stirred and passed into the spray drying tower to react in situ with the gas containing 40% carbon dioxide (the other 60% is nitrogen). The inlet temperature of the spray dryer is 400°C, the outlet temperature is 100°C, and the atomized particle size is 30 microns, after spray drying, the finished product of white carbon black was obtained, and the performance test was carried out.

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Abstract

The invention relates to a method for preparing white carbon black through a one-step method, which is characterized by introducing a water glass solution into a spray drying reaction tower with a carbon dioxide atmosphere, and performing in-situ reaction to prepare the white carbon black. The method provided by the invention comprises the following steps: uniformly stirring the water glass solution having a certain modulus and containing certain concentration of quaternary ammonium salt at a certain temperature and a certain stirring rate, introducing into the spray drying tower, performing in-situ reaction with carbon dioxide, and performing spray drying to obtain the white carbon black finished product. The method provided by the invention has low requirements for equipment, greatly reduces subsequent white carbon black processing, and saves resources. The raw materials are simple, accessible and low in cost; waste of water resources and use of acid are reduced; the method is quick and efficient in reaction and friendly to environment; and the generated white carbon black product is small in size, is uniformly distributed, conforms to various performance indices of white carbon black for rubber and has favorable economic benefits.

Description

technical field [0001] The invention relates to a method for preparing white carbon black in one step. The invention adopts the method of in-situ reaction of carbon dioxide and water glass solution in the reaction tower of the spray dryer to prepare the white carbon black, and sprays and dries to directly obtain the finished white carbon black. Background technique [0002] At present, in the silica industry at home and abroad, the industrialized silica preparation processes mainly include gas phase method and precipitation method. The gas phase method generally uses silicon tetrachloride or silicon trichloride as raw materials, but the raw materials are expensive, so the cost is relatively high. Precipitated silica is widely used because of its simple production process, low cost and large output. [0003] Nowadays, the development trend of the preparation process of white carbon black is towards the direction of high dispersion and nanometerization. There is a big gap i...

Claims

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Application Information

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