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A kind of preparation method of high-purity spherical magnesium carbonate powder for cosmetics

A technology of magnesium carbonate and cosmetics, applied in the direction of magnesium carbonate, etc., can solve the problems of short reaction time, excessive heavy metal ion concentration, unsatisfactory, etc., achieve low production cost, reduce waste liquid treatment cost, and improve production efficiency.

Active Publication Date: 2019-10-29
河北镁神科技股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The product obtained by this process has high purity and short reaction time, but the concentration of heavy metal ions contained in the product seriously exceeds the national standard, which cannot meet the demand for cosmetic grade spherical magnesium carbonate

Method used

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  • A kind of preparation method of high-purity spherical magnesium carbonate powder for cosmetics
  • A kind of preparation method of high-purity spherical magnesium carbonate powder for cosmetics
  • A kind of preparation method of high-purity spherical magnesium carbonate powder for cosmetics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The average particle diameter of the selected raw material magnesium hydroxide (1) is 180nm, the heavy metal content calculated as lead is 8ppm, and the chloride ion content is 0.015%. Weigh 180 kg of the raw material magnesium hydroxide (1) into the slurry mixing tank, add deionized water (2) to prepare magnesium hydroxide reaction slurry A with a mass concentration of 60 g / L.

[0044] Put the reaction slurry A in the mixing tank into the carbonization tower, and add the carbonized crystal form directing agent (5) into the carbonization tower, the added carbonized crystal form directing agent is sorbitol, and the concentration of sorbitol in the carbonization tower 0.5g / L; Then feed pressure and be 0.2MPa carbon dioxide (4) to carry out carbonization reaction, control carbonization reaction temperature to be 30 ℃, when the pH of the slurry in the carbonization tower reaches 8.5, carbonization reaction is completed, obtains intermediate product magnesium carbonate slurry...

Embodiment 2

[0049] The average particle diameter of the selected raw material magnesium hydroxide (1) is 200nm, the heavy metal content calculated as lead is 10ppm, and the chloride ion content is 0.02%. Weigh 150 kg of the raw material magnesium hydroxide (1) into the slurry mixing tank, add deionized water (2) to prepare magnesium hydroxide reaction slurry A with a mass concentration of 50 g / L.

[0050] Put the reaction slurry A in the mixing tank into the carbonization tower, and add the carbonization crystal form directing agent (5) in the carbonization tower, the added carbonization crystal form directing agent is glycerol and lecithin, and in the carbonization tower, glycerol and The concentration of lecithin is respectively 0.4g / L; Pass into pressure then and be 0.4MPa carbon dioxide (4) to carry out carbonization reaction, control carbonization reaction temperature to be 50 ℃, when the pH of slurry in the carbonization tower reaches 9.0, carbonization reaction is completed, obtains...

Embodiment 3

[0055] The average particle diameter of the selected raw material magnesium hydroxide (1) is 140nm, the heavy metal content calculated as lead is 9ppm, and the chloride ion content is 0.01%. Weigh 210 kg of the raw material magnesium hydroxide (1) into the slurry mixing tank, add deionized water (2) to prepare magnesium hydroxide reaction slurry A with a mass concentration of 70 g / L.

[0056] Put the reaction slurry A in the mixing tank into the carbonization tower, and add the carbonization crystal form directing agent (5) into the carbonization tower, the added carbonization crystal form directing agent is glycerol, and the concentration of glycerin in the carbonization tower is 0.9 g / L; Then feed pressure and be 0.8MPa carbon dioxide (4) to carry out carbonization reaction, control carbonization reaction temperature to be 60 ℃, when the pH of slurry in the carbonization tower reaches 9.0, carbonization reaction is finished, obtains intermediate product magnesium carbonate sl...

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Abstract

The invention relates to a preparation method of high-purity spherical magnesium carbonate powder for cosmetics, and particularly relates to a method for producing spherical magnesium carbonate having a specific bulk density range and having an extremely small heavy metal content for cosmetics. The method is characterized in that magnesium hydroxide within a specific particle size range and carbon dioxide gas are adopted as raw materials; carbonization reaction is carried out in a carbonization tower into which a carbonization crystal form guiding agent is added in advance; curing is carried out in a curing tank into which a curing stabilizer is added in advance; thereby a spherical magnesium carbonate product, which has the advantages that the crystal form is complete, the purity is high, and the bulk density and the like meet requirements, for cosmetics is obtained.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, in particular to a method for preparing high-purity spherical magnesium carbonate powder for cosmetics, in particular to a method for producing spherical magnesium carbonate for cosmetics with a specific bulk density range. Background technique [0002] Cosmetics are applied to the human body (skin, hair, nails, mouth, lips, teeth, etc.) by smearing, spraying, sprinkling or other similar methods in order to clean, maintain, beautify, modify and change the appearance, or modify the body odor , Products for the purpose of maintaining good condition. In many cosmetic categories, the cosmetics produced by using spherical magnesium carbonate as an additive are smooth, fine and smooth, with good hand feeling, white chroma, smooth and bright skin, and excellent whitening effect, so they are especially loved by people. And in the national standard, the index requirements for magnesium carbonat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F5/24
CPCC01F5/24C01P2002/72C01P2004/32C01P2004/61C01P2006/80
Inventor 毕立亨翟立强李连会董文涛翟旭滨王琛王立云刘润静胡永琪
Owner 河北镁神科技股份有限公司
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