Preparation process of magnesium carbonate for cosmetics

raw material:

magnesium oxide
carbon dioxide
High Purity Magnesium Oxide






Screening machine

Process flow:

1. Ingredients

Add magnesium oxide and water to the reaction kettle in a certain proportion.

2. Reaction

Carbon dioxide is introduced and the temperature is controlled at 60-70°C. Magnesium carbonate and water are produced during the reaction. The reaction equation is as follows:

MgO + CO2 + H2O → MgCO3·xH2O

3. Washing

After the reaction is completed, water is added to wash the reaction product to remove impurities.

4. Drying

The washed magnesium carbonate is dried to remove moisture.

5. smash

The dried magnesium carbonate is pulverized to obtain fine powder.

6. Screening

Use a sieving machine to classify the fine powder by particle size to obtain the required magnesium carbonate for cosmetics.

Key points of the process:

Reaction temperature control: Excessive temperature will lead to the formation of impurities and affect the quality of magnesium carbonate.

Number of washings: Adequate washing can effectively remove impurities and improve the purity of magnesium carbonate.

Drying method: Use appropriate drying methods to avoid magnesium carbonate adsorbing moisture and affecting its performance.

Degree of crushing: The size of the particles affects the effectiveness of magnesium carbonate in cosmetics.

Impurity control: Strictly control the reaction raw materials and process parameters to avoid the introduction of impurities and ensure the safety of magnesium carbonate.

Finished product standards:

This makes magnesium carbonate an ideal ingredient in cosmetic products that control oil production and minimize pores.

Magnesium carbonate for cosmetics should meet the following standards:

Appearance: white or light gray powder
Purity: ≥98%
Granularity: on request
pH value: 8-10
Weight loss: ≤1%
Heavy metals: lead ≤ 10ppm, mercury ≤ 1ppm
food grade magnesium carbonate
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