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Large-pore-volume high-adsorption silicon dioxide additive and preparation method thereof

A silicon dioxide, high adsorption technology, applied in chemical instruments and methods, additional food elements, inorganic chemistry, etc., can solve adsorption, stability, anti-caking and poor fluidity, flow performance and anti-caking performance. , poor adsorption performance of silica particles, etc., to achieve good stability, high adsorption performance, and the effect of increasing pore volume

Active Publication Date: 2021-01-08
ZHAOQING SANJIANG SILICON MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Silica is mainly used as a carrier of vitamins, flavoring agents or antioxidants in feed additives, which requires silica particles to have larger pore volume and higher adsorption, but the conventional silica particle size is relatively small Small size and low pore volume lead to poor adsorption performance of silica particles, and less active ingredients can be carried in the preparation of feed, which affects its application
Although the silica prepared by this method has a large pore volume, its flowability and anti-caking performance are poor
[0006] In summary, there are generally technical problems such as small particle size and pore volume of silica, poor adsorption, stability, anti-caking and fluidity in the prior art.

Method used

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  • Large-pore-volume high-adsorption silicon dioxide additive and preparation method thereof

Examples

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Effect test

Embodiment 1

[0028] Example 1, a large pore volume high adsorption silica additive and its preparation method

[0029] The preparation method of described large pore volume high adsorption silica additive comprises the following steps:

[0030] S1, configuration molar concentration is the sodium silicate solution of 0.45mol / L and the dilute sulfuric acid solution that molar concentration is 1mol / L;

[0031] S2, add 10m in reaction tank 3 The sodium silicate solution prepared in step S1 is heated up to 85°C, the stirring device is turned on and the stirring frequency is set to 25Hz, and the anionic surfactant K12 surfactant is added, and the mass of the K12 surfactant is 0.005% of the mass of the sodium silicate solution. %, continue to stir for 5min;

[0032] S3, continue to add the dilute sulfuric acid solution that step S1 makes in the reaction tank, the adding speed of dilute sulfuric acid is 2.0m 3 / h, when the emulsification point appears instantly in the reaction system and the pH...

Embodiment 2

[0034] Example 2, a large pore volume high adsorption silica additive and its preparation method

[0035] The preparation method of described large pore volume high adsorption silica additive comprises the following steps:

[0036] S1, configuration molar concentration is the sodium silicate solution of 0.58mol / L and the dilute sulfuric acid solution that molar concentration is 1.45mol / L;

[0037] S2, add 10m in reaction tank 3 The sodium silicate solution prepared in step S1 is heated up to 88° C., the stirring device is turned on and the stirring frequency is set to 30 Hz, and the anionic surfactant K12 surfactant is added, and the mass of the K12 surfactant is 0.01% of the mass of the sodium silicate solution. %, continue to stir for 5min;

[0038]S3, continue to add the dilute sulfuric acid solution that step S1 makes in the reaction tank, the adding speed of dilute sulfuric acid is 2.3m 3 / h, when the emulsification point appears instantly in the reaction system and th...

Embodiment 3

[0040] Example 3, a large pore volume high adsorption silica additive and its preparation method

[0041] The preparation method of described large pore volume high adsorption silica additive comprises the following steps:

[0042] S1, configuration molar concentration is the sodium silicate solution of 0.75mol / L and the dilute sulfuric acid solution that molar concentration is 2mol / L;

[0043] S2, add 10m in reaction tank 3 The sodium silicate solution prepared in step S1 is heated up to 90° C., the stirring device is turned on and the stirring frequency is set to 35 Hz, and the anionic surfactant K12 surfactant is added, and the mass of the K12 surfactant is 0.015% of the mass of the sodium silicate solution. %, continue to stir for 5min;

[0044] S3, continue to add the dilute sulfuric acid solution that step S1 makes in the reaction tank, the adding speed of dilute sulfuric acid is 2.5m 3 / h, when the emulsification point appears instantly in the reaction system, and th...

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Abstract

The invention belongs to the technical field of silicon dioxide, and particularly relates to a large-pore-volume high-adsorption silicon dioxide additive and a preparation method thereof. A sodium silicate solution and a dilute sulfuric acid solution are adopted, an anionic surfactant is added before reaction, and the large-pore-volume high-adsorption silicon dioxide additive is prepared through the processes of reaction, aging, sufficient reaction with hot water, filter pressing washing, spray drying and the like. The large-pore-volume high-adsorption silicon dioxide additive provided by theinvention has an oil absorption value of 250-300 / 100g, a particle size of 40-80 microns, an average pore diameter of 10-20 nm and a pore volume of 1.0-2.5 cm < 3 > / g, has relatively high pore volume and adsorption performance, and can bear more active ingredients in a feed preparation process. Meanwhile, the large-pore-volume high-adsorption silicon dioxide provided by the invention has good stability, caking resistance and fluidity.

Description

technical field [0001] The invention belongs to the technical field of silicon dioxide, and in particular relates to a silicon dioxide additive with large pore volume and high adsorption and a preparation method thereof. Background technique [0002] my country's feed industry started in the 1970s. After nearly 30 years of rapid development, my country's feed industry has achieved leapfrog development and has become an important national economic basic industry that drives the planting industry and supports the development of the breeding industry. The output of my country's feed industry ranks first in the world. In 2017, enterprises above designated size in my country's feed processing industry achieved sales revenue of 1.108 billion yuan, which makes feed additives increasingly important. [0003] Although the amount of feed additives used in feed is small, the role of feed additives in feed is indeed irreplaceable. Feed additives can balance the nutritional content of fe...

Claims

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Application Information

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IPC IPC(8): C01B33/193A23K20/20B82Y40/00
CPCA23K20/20B82Y40/00C01B33/193C01P2004/61C01P2006/14C01P2006/17
Inventor 郑松玲王宪伟庹文喜蒋建华任志坤
Owner ZHAOQING SANJIANG SILICON MATERIALS CO LTD
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