The foreign magnesium hydroxide industry developed earlier, and its annual output can reach more than 10,000 tons, mainly in Israel, the United States, and Japan, mainly producing high purity and high whiteness. Compared with foreign companies, the production capacity of my country’s food-grade magnesium hydroxide companies is far from enough, and high-grade products cannot meet the needs of the international market due to technical reasons. Except for Hebei Messi Biology Co., Ltd. other companies cannot compare with foreign companies in terms of quantity or quality. Therefore, it is very necessary to develop domestic magnesium hydroxide companies from a high starting point and at a high speed. With the current technological development in the biological field in China, the application field of magnesium hydroxide will become more and more extensive, especially the demand for food-grade magnesium hydroxide is huge.
Application field:
Magnesium hydroxide is generally white amorphous powder or colorless hexagonal prism crystal. The production raw materials are very extensive and the cost is low. It is widely used in food, medicine, chemical industry and drinking water treatment.
Since magnesium hydroxide is a medium-strong base (magnesium hydroxide has very low solubility, the solution is very weakly alkaline, and is sometimes treated as a weak base), the corrosiveness and alkalinity of its solution are relatively small, so it can be used as an acidity regulator in food to play a role in buffering, neutralization, and solidification. Food-grade magnesium hydroxide has relatively high activity, a relatively loose structure, high purity, good whiteness, low impurity content, and does not contain harmful elements such as Pb and As.
Preparation process:
1. In industry, seawater is often reacted with cheap calcium hydroxide solution (lime milk) to obtain magnesium hydroxide precipitation.
2. The new process for preparing magnesium hydroxide from dolomite can obtain magnesium hydroxide products with good purity, good dispersibility, and in the form of flakes.