A kind of low-density colored silica particles with porous structure and its preparation

A silicon dioxide, porous structure technology, applied in inorganic chemistry, silicon compounds, chemical instruments and methods, etc., can solve the problems of lack of friction performance, high production energy consumption, difficult stirring, etc., and achieve bright color and low production cost. , the effect of the simple method

A silicon dioxide, porous structure technology, applied in inorganic chemistry, silicon compounds, chemical instruments and methods, etc., can solve the problems of lack of friction performance, high production energy consumption, difficult stirring, etc., and achieve bright color and low production cost. , the effect of the simple method

CN109704349BActive Publication Date: 2019-11-22GUANGZHOU FEIXUE MATERIAL TECH
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  • A kind of low-density colored silica particles with porous structure and its preparation
  • A kind of low-density colored silica particles with porous structure and its preparation

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Embodiment 1, the present invention has the low-density green silica particle of porous structure and its preparation

[0027] S1. Inject 0.5m of sulfuric acid solution with a concentration of 0.5mol / L into the preparation tank 3 , then dropwise add a water glass solution with a concentration of 0.5mol / L and a modulus of 1.0 to a pH value of 1.5, and stir for 0.5h to prepare an acidic silica sol solution for subsequent use;

[0028] S2, inject concentration into reaction tank and be the sulfuric acid solution 3m of 0.8mol / L 3 , then add 1 kg of hydroxyethyl cellulose, stir for 20 min, then add dropwise the acidic silica sol solution and the water glass solution with a concentration of 0.8mol / L and a modulus of 3.3 at the same time, after the acidic silica sol solution has been added dropwise , continue to drop the water glass solution until the pH value is 3, then add 2 kg of edible green No. 3 solution with a mass percentage concentration of 10%, continue to drop the ...

Embodiment 2

[0031] Example 2. Low-density red silica particles with porous structure of the present invention and its preparation

[0032] S1. Inject 0.9m of sulfuric acid solution with a concentration of 0.8mol / L into the preparation tank 3 , then dropwise add a water glass solution with a concentration of 0.8mol / L and a modulus of 1.5 until the pH value is 2.5, and stir for 1 hour to obtain an acidic silica sol solution for subsequent use;

[0033] S2, inject concentration into reaction tank and be the sulfuric acid solution 4m of 1.2mol / L 3, then add 3 kg of hydroxyethyl cellulose, stir for 30 min, then add dropwise the acidic silica sol solution and the water glass solution with a concentration of 1.2mol / L and a modulus of 3.5 at the same time, after the acidic silica sol solution has been added dropwise , continue to drop the water glass solution until the pH value is 4, then add 3 kg of edible red No. 3 solution with a mass percentage concentration of 10%, continue to drop the wate...

Embodiment 3

[0036] Embodiment 3, the low-density blue silica particle with porous structure of the present invention and its preparation

[0037] S1. Inject 0.7m of sulfuric acid solution with a concentration of 0.6mol / L into the preparation tank 3 , then dropwise add a water glass solution with a concentration of 0.6mol / L and a modulus of 1.0 until the pH value is 2.0, and stir for 0.5h to prepare an acidic silica sol solution for subsequent use;

[0038] S2. Inject 3.5m of sulfuric acid solution with a concentration of 1.0mol / L into the reaction tank 3 , then add 2 kg of hydroxyethyl cellulose, stir for 25 min, then add dropwise the acidic silica sol solution and the water glass solution with a concentration of 1.0mol / L and a modulus of 3.4 at the same time, after the acidic silica sol solution has been added dropwise , continue to drop the water glass solution until the pH value is 3, then add 2 kg of edible blue No. 1 solution with a mass percentage concentration of 10%, continue to ...

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Abstract

Provided are low-density colored silica particles having a porous structure, and a preparation method thereof. The preparation method comprises: dropwise adding a sodium silicate solution to a sulfuric acid solution to obtain an acidic silica sol solution; injecting the sulfuric acid solution and hydroxyethyl cellulose into a reaction tank, then adding the acidic silica sol solution and sodium silicate solution simultaneously; after the acidic silica sol solution is added dropwise, continuing to add the sodium silicate solution dropwise until the pH value is 3–4; adding pigment and then adding sodium silicate solution dropwise until a final pH value is reached, then stirring until the system precipitates a gel; adding ethanol and glycerol to the gel and stirring; pressure-filtering, drying, crushing, washing, and drying the gel to obtain colored silica particles. The silica particles have good suspension performance and adsorption performance, and mild friction performance, and are suitable for application in everyday products such as shower gel, facial cleanser, and toothpaste, and thus have good prospects for application.

Description

technical field [0001] The invention belongs to the technical field of precipitated silica, and in particular relates to a low-density colored silica particle with a porous structure and a preparation method thereof. Background technique [0002] With the progress of society and the improvement of people's material life, people's consumption concepts have changed, and consumers have more diversified requirements for products, not only requiring high quality and efficiency of products, but also requiring them to have a certain beauty. Colored silica particles have high dyeing rate, stable coloring, non-toxic and pollution-free, stable chemical and physical properties, so they are widely used in daily chemical products such as shower gel, facial cleanser, washing powder, toothpaste, etc. [0003] However, the density of colored silica particles currently on the market is relatively high, and they tend to sink during the production process, resulting in uneven distribution of p...

Claims

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Application Information

Patent Timeline
22 Nov 2019
Publication
CN109704349B
IPC
C01B33/193
CPC
C01B33/193
Inventors
任振ι›ͺ; θƒ‘ιž