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Preparation method for high-oil absorption microsphere-shaped white carbon black

A white carbon black and high oil absorption technology, applied in chemical instruments and methods, inorganic chemistry, and other chemical processes, can solve problems such as poor fluidity, poor slow-release effect, and low oil absorption value, and achieve easy-to-obtain raw materials and flow Good properties and dispersibility, less dust effect

Inactive Publication Date: 2017-05-10
FUJIAN ZHENGSHENG INORGANIC MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a preparation method of high oil-absorbing micropearl silica, which solves the problem of low oil absorption value, poor fluidity, and poor slow-release effect when the existing silica is used as an adsorption carrier in feed, cosmetics, and medicine. The problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Specific steps are as follows:

[0017] 1. Refining of sodium silicate solution

[0018] Take water glass with a modulus of 3.40-3.50 and dissolve it in a static autoclave. After standing for clarification, take the supernatant to make a sodium silicate solution with a mass ratio concentration of 23%.

[0019] 2. Synthesis reaction

[0020] at 120m 3 The reactor was charged with 50 m 3 water, while adding 23% sodium silicate solution 5-6 m 3 , warming up to 85 o C, start the reaction after the temperature stabilizes, set the stirring frequency, add water glass and concentrated sulfuric acid dropwise at the same time, water glass drops 18.5-19.6 m per hour 3 , adding 0.8-1.1 m of concentrated sulfuric acid dropwise per hour 3 , monitor the pH value every 10 minutes to keep it at 10-11, the reaction is over for 105 minutes, continue to stir for 15 minutes, add acid until the pH is 4.5-5.0, and put it into the slurry tank after aging for 30 minutes.

[0021] 3. Filt...

Embodiment 2

[0028] The specific operation steps are as follows:

[0029] 1. Refining of sodium silicate solution

[0030] Take water glass with a modulus of 3.40-3.50 and dissolve it in a static autoclave. After standing for clarification, take the supernatant to make a sodium silicate solution with a mass ratio concentration of 20%.

[0031] 2. Synthesis reaction

[0032] at 120m 3 The reactor was charged with 50 m 3 Water, while adding 20% ​​concentration of sodium silicate solution 5 ~ 6 m³, heated to 82 o C, start the reaction after the temperature stabilizes, add water glass and concentrated sulfuric acid dropwise at the same time under the condition of setting the stirring intensity, water glass drops 18.5-19.6 m per hour 3 , concentrated sulfuric acid is added dropwise at about 0.8-1.1 m per hour 3 , monitor the pH value every 10 minutes to keep it at 10-11, the reaction is over for 120 minutes, continue to stir for 15 minutes to bring the pH value of the peracid to 4.5-5.0, s...

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Abstract

The invention discloses a preparation method for high-oil absorption microsphere-shaped white carbon black, and white carbon black used for an adsorption carrier is obtained by reaction between sodium silicate and concentrated sulfuric acid through filter pressing, washing, pulping and pressure spray drying. The preparation method comprises the following concrete operating steps: firstly, refining sodium silicate solution; then, performing synthetic reaction with a gel sol method, controlling a pH value to be 10 to 11 in a reaction process so as to lower micropore proportion of the white carbon black and increase proportion of mesopores to macropores, and ageing for two times after reaction is ended, and then transferring to an intermediary tank; then, performing solid-liquid separation and washing on reaction slurry; then, pulping a filter cake; and then, performing pressure spray drying on slurry so as to obtain the microsphere-shaped white carbon black of a three-dimensional network structure with little dust and high flowability and dispersity, and finally, performing secondary drying on the microsphere-shaped white carbon black by a fluidized bed, and entering a microsphere product stock bin for packaging after the microsphere-shaped white carbon black is qualified, and warehousing. According to the preparation method disclosed by the invention, the problems the oil absorption value is low, flowability is poor and the slow-release effect is not good when existing white carbon black is applied to fodder, medicine and cosmetics as the adsorption carrier.

Description

technical field [0001] The invention relates to a method for preparing inorganic functional material white carbon black, in particular to a method for preparing high oil-absorbing microbeaded white carbon black. Background technique [0002] Silica is a widely used inorganic functional material. As a filler, it is used in tires, rubber and other fields; as a matting agent, it is used in coatings and inks; as an adsorption carrier, it is used in feed, pesticides, cosmetics and other fields. The production process of precipitation method uses sodium silicate and concentrated sulfuric acid as raw materials, and it is prepared after gel sol reaction, pressure filtration, pulping, pressure spray drying and other processes. Due to the ubiquitous problems of low oil absorption value, poor fluidity, and poor slow-release effect in the current silica products, there are obvious defects in the application as an adsorption carrier in feed, cosmetics, and medicine. Therefore it is imp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/193B01J20/30B01J20/20
CPCC01B33/193B01J20/20C01P2002/30C01P2006/10C01P2006/12C01P2006/14C01P2006/19
Inventor 任立荣王剑峰曾志恩杨志冲王丹
Owner FUJIAN ZHENGSHENG INORGANIC MATERIAL
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