Process for preparing magnesium carbonate whisker

A technology of magnesium carbonate whiskers and magnesium bicarbonate, which is applied in directions such as magnesium carbonate, can solve the problems of low purity, excessively large specific surface area of ​​basic magnesium carbonate, poor mechanical properties of secondary agglomerated particles, etc. simple effect
CN1463923AInactive Publication Date: 2003-12-31INST OF PROCESS ENG CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
INST OF PROCESS ENG CHINESE ACAD OF SCI
Publication Date
2003-12-31
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention is the process of preparing magnesium carbonate crystal whisker from magnesium bicarbonate solution. Into magnesium bicarbonate solution, proper amount of additive is added, and through controlling the crystallization condition, magnesium carbonate crystal whisker in different sizes is prepared. Thus obtained magnesium carbonate crystal whisker has diameter of 0.1-5 microns and length of 10-2000 microns, may be used as reinforcing material for paint, plastic, rubber, etc. and may be used also as the intermediate product for preparing high-purity magnesia and other magnesium salt. The present invention opens new way for the comprehensive utilization of magnesium salt and has excellent application foreground.
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Description

field of invention

[0001] The invention relates to the technical field of preparation chemicals, in particular to a method for preparing magnesium carbonate whiskers from an aqueous solution of magnesium bicarbonate. Background technique

[0002] Magnesium carbonate whiskers are single crystals of magnesium carbonate. Compared with ordinary basic magnesium carbonate, the crystals of magnesium carbonate whiskers are completely developed, and the whiskers are colorless and transparent. The crystal contains few defects, the crystal contains few impurities, and the crystal has high strength. Therefore, magnesium carbonate whiskers can be used to prepare high-purity magnesium oxide, magnesium hydroxide, basic magnesium carbonate, magnesium sulfate, magnesium chloride, magnesium nitrate, and other magnesium salt products. At the same time, due to the good mechanical properties of magnesium carbonate whiskers, magnesium carbonate whiskers can also be ...

Claims

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