A kind of friction type silicon dioxide with low oil absorption value and high specific surface area and preparation method thereof

A high specific surface area, silica technology, applied in the direction of silica, silica, cosmetic preparations, etc., can solve the problems of large pore size of silica, strong fragrance adsorption, limited thickening effect, etc. It has the effect of high viscosity with powder, improving hair permeability and strong surface activity

Active Publication Date: 2019-10-01
GUANGZHOU FEIXUE MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems existing in the existing friction-type silica products and their preparation (such as complex methods, large pore size of silica, strong adsorption to essence, low powder viscosity, limited thickening effect, etc.), the present invention firstly provides A method for preparing frictional silicon dioxide with low oil absorption value and high specific surface area is simple. It adopts a one-step hydrothermal precipitation method and controls the key parameters such as reaction bottom liquid, material concentration, reaction pH value and reaction temperature. Obtain friction silica with low oil absorption value, high specific surface area, small pore size and high powder viscosity

Method used

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  • A kind of friction type silicon dioxide with low oil absorption value and high specific surface area and preparation method thereof
  • A kind of friction type silicon dioxide with low oil absorption value and high specific surface area and preparation method thereof
  • A kind of friction type silicon dioxide with low oil absorption value and high specific surface area and preparation method thereof

Examples

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Effect test

Embodiment 1

[0022] Example 1. Friction-type silica with low oil absorption value and high specific surface area of ​​the present invention and its preparation method

[0023] S1, 12m of sodium sulfate solution with a concentration of 5.0% by weight added to the reactor 3 and sodium silicate solution 330L, heated to 85°C, while stirring, add 7m sodium silicate solution dropwise 3 With sulfuric acid solution, maintain the pH value of the reaction system at 11.2, and control the dropping time for 20 minutes;

[0024] S2. After the sodium silicate solution is added dropwise, stop adding acid and add 1m sodium silicate solution 3 , aging for 15 minutes; then continue to add sulfuric acid solution dropwise until the pH value at the end of the reaction is 4.0, stop adding acid, and age for 10 minutes;

[0025] S3. Press filter the formed silica, wash it, spray dry it, and crush it to a particle size of 11 μm by air flow to obtain a frictional silica with a low oil absorption value and a high s...

Embodiment 2

[0027] Example 2. Friction-type silica with low oil absorption value and high specific surface area of ​​the present invention and its preparation method

[0028] S1, the weight percent concentration that adds in the reactor is 6.5% sodium sulfate solution 14m 3 and sodium silicate solution 360L, heated to 90°C, while stirring, add 9m sodium silicate solution dropwise 3 With sulfuric acid solution, maintain the pH value of the reaction system at 11.6, and control the dropping time to 40min;

[0029] S2. After the sodium silicate solution is added dropwise, stop adding acid and add 2m sodium silicate solution 3 , aging for 20 minutes; then continue to add sulfuric acid solution dropwise until the pH value at the end of the reaction is 5.0, stop adding acid, and age for 15 minutes;

[0030] S3. Press filter the formed silica, wash it, spray dry it, and crush it to a particle size of 11 μm by air flow to obtain a frictional silica with a low oil absorption value and a high spec...

Embodiment 3

[0032]Example 3. Friction-type silica with low oil absorption value and high specific surface area of ​​the present invention and its preparation method

[0033] S1, 13m of sodium sulfate solution with a concentration of 5.5% by weight added to the reactor 3 and sodium silicate solution 340L, heated to 87°C, while stirring, add 8m sodium silicate solution dropwise 3 With sulfuric acid solution, maintain the pH value of the reaction system at 11.4, and control the dropping time for 30 minutes;

[0034] S2. After the sodium silicate solution is added dropwise, stop adding acid and add 1.5m sodium silicate solution 3 , aging for 15 minutes; then continue to add sulfuric acid solution dropwise until the pH value at the end of the reaction is 4.4, stop adding acid, and age for 10 minutes;

[0035] S3. Press filter the formed silica, wash it, spray dry it, and crush it to a particle size of 11 μm by air flow to obtain a frictional silica with a low oil absorption value and a high ...

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Abstract

Provided are a friction type silicon dioxide having a low oil absorption value and a high specific surface area and a preparation method therefor. The method comprises: S1: adding a sodium sulfate solution and a sodium silicate solution into a reaction kettle, heating the solutions to 85-90°C, and dropwise adding a sodium silicate solution and a sulfuric acid solution simultaneously to maintain the pH value at 11.2-11.6; S2: after the sodium silicate solution is dropwise added, stopping the addition of the acid, then adding the sodium silicate solution, aging, and then continuing to dropwise add the sulfuric acid solution until the final pH value is 4.0-5.0, stopping the addition of the acid, and aging; and S3: filter-pressing, washing, drying, and crushing the silicon dioxide to obtain a silicon dioxide product. The obtained silicon dioxide has a good friction cleaning property and a toothpaste thickening effect, and can reduce the use amount of thickened silicon dioxide and the adsorption to an essence, enhance the volatility of the essence, improve the taste of the toothpaste, and reduce the costs of the toothpaste.

Description

technical field [0001] The invention belongs to the technical field of silicon dioxide for toothpaste, and in particular relates to a frictional silicon dioxide with low oil absorption value and high specific surface area and a preparation method thereof. Background technique [0002] The physical and chemical properties of silicon dioxide are stable, environmentally friendly, acid and alkali resistant, high temperature resistant, etc., and it has good compatibility with toothpaste raw materials, high fluorine compatibility, and has the function of cleaning the oral cavity, so it is widely used as abrasives and thickeners in toothpaste. [0003] At present, silica for toothpaste on the market is mainly prepared by precipitation method, which is an amorphous mesoporous material. Thickened silica has a large specific surface area (greater than 150m 2 / g), high oil absorption value, water absorption and powder viscosity; frictional silica specific surface area is small (less ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/18A61K8/25A61Q11/00
CPCA61K8/25A61K2800/28A61Q11/00C01B33/18C01P2006/12C01P2006/17C01P2006/19C01P2006/22
Inventor 任振雪梁少彬高文颖林英光李丽峰
Owner GUANGZHOU FEIXUE MATERIAL TECH
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