Title: Extracting potassium sulphate and its by-products magnesium sulfate, etc. from gypsum and halogen chroismite
Application Number: 89101455 Application Date: 1989.03.22
Publication Number: 1045755 Publication Date: 1990.10.03
Approval Pub. Date: Granted Pub. Date: 1992.09.09
International Classifi-cation: C01D5/00,C01F5/40,C01F11/46
Applicant(s) Name: Geology Research Inst. of National Building Materi Address:
Inventor(s) Name: Chen Peiling
Attorney & Agent: HE MINGXUE
Abstract:
     The present invention refers to a method for extracting potassium sulfate, magnesium sulfate, and calcium sulfate from mixed ore of gypsum and polyhalite. The solvent contg, 3.5% potassium sulfate is prepared from the ore sample and the potassium sulfate, magnesium sulfate, and calcium sulfate are directly separated and extracted from the polyhalite without need of any reagents due to the homoion effect.
Time: 8