Magnesium carbonate for cosmetics is a white or slightly yellow amorphous powder with adsorption, covering, smoothness and other characteristics. It is often used in cosmetics as an adsorbent, filler, covering agent, thickener, etc.

The preparation processes of magnesium carbonate for cosmetics mainly include the following:

Calcination method: Calcining natural magnesite or magnesite at high temperature to generate magnesium carbonate and carbon dioxide.

Hydrolysis method: Dissolve metal magnesium or magnesium oxide in water, then add carbon dioxide for hydrolysis to generate magnesium carbonate.

Magnesium carbonate emulsion method: vacuum dry the magnesium carbonate emulsion to obtain magnesium carbonate powder.

Among them, the calcination method is the most commonly used preparation method for magnesium carbonate for cosmetics. This method has wide sources of raw materials, simple production process and low cost.

Process flow of preparing magnesium carbonate for cosmetics by calcination method

1. Raw material processing: Crush natural magnesite or magnesite to a certain particle size, and then screen to remove impurities.
2. Calcination: Calculate the crushed raw materials at a high temperature of 900-1000°C to generate magnesium carbonate and carbon dioxide.
3. Cooling: Cool the calcined product to room temperature.
4. Screening: Sieve the cooled product to a certain particle size.
5. Packaging: Pack the screened products.

Quality requirements for magnesium carbonate for cosmetics

Magnesium carbonate for cosmetics should meet the following quality requirements:

Appearance: White or slightly yellow amorphous powder.
Particle size: The particle size is required to be uniform and particles larger than 5 μm are not allowed.
Oil absorption capacity: The oil absorption capacity is required to be not less than 100%.
Covering power: Covering power is required to be no less than 90%.
Smoothness: Good smoothness is required.

Application of magnesium carbonate for cosmetics

Magnesium carbonate for cosmetics has the following applications in cosmetics:

Adsorbent: It can absorb oil, moisture, etc. in cosmetics and play the role of oil control and moisturizing.

Fillers: can add volume and weight to cosmetics and improve their texture.

Covering agent: Can cover blemishes on the skin, making the skin smoother and more delicate.

Thickener: It can make cosmetics have a certain consistency and make them easier to use.

Magnesium carbonate for cosmetics is a safe and effective cosmetic raw material and has a wide range of applications in cosmetics.