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Preparation process, high productivity of aluminum trihydroxide, high purity and less than 4 micrometers, adjusted to demand average diameter.
Preparation process, high productivity of aluminum trihydroxide, high purity and less than 4 micrometers, adjusted to demand average diameter.
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机译:制备过程中,氢氧化铝的生产率高,纯度高且小于4微米,并调整到要求的平均直径。
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摘要
A process for the production of pure aluminum trihydroxide having a controlled median diameter of less than 4 microns with a unimodal distribution and a minimum deviation. The process comprises contacting, for a short time, sodium aluminate solution with a small quantity of ground aluminum trihydroxide having a specific BET surface area of at least 8 m2/g, separating the sodium aluminate solution from the solid phase comprising ground aluminum trihydroxide and aluminum trihydroxide precipitate containing impurities, then decomposing the purified sodium aluminate solution in the presence of a quantity of pure ground aluminum trihydroxide from a preceding decomposition operation to precipitate a very pure aluminum trihydroxide having the specified median diameter.
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