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Strontium carbonate from crude phosphate
Strontium carbonate from crude phosphate
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机译:粗磷酸盐中的碳酸锶
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摘要
The residue separated from the solution after dissolving the crude phosphate in nitric acid is washed with nitric acid to remove the remainder of the digestion product. It is then mixed to a suspension with H2O and ammonia led in at 40-110 degrees C.M preferably 80-100 degrees C., to give pH 2.0, preferably 4.0-7.0. The solid material is separated from the liquid and into the latter are passed NH3 +CO2 in a molar ratio 2 : 1, at 30-100 degrees C., preferably 60-65 degrees C., until precipitation of strontium carbonate is complete.
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机译:将粗磷酸盐溶于硝酸后,从溶液中分离出的残留物用硝酸洗涤,以除去消化产物的剩余部分。然后将其与H 2 O混合并混入悬浮液中,并在40-110℃,优选80-100℃下引入氨,以使pH> 2.0,优选4.0-7.0。将固体材料从液体中分离出来,并在30-100℃,优选60-65℃下以2∶1的摩尔比使NH 3 + CO 2进入液体中,直到碳酸锶沉淀完全为止。
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