PatentNo.: 89 104730. 1 date of patent application:1July 987 18 Patent holder: Gansu Rare Earth Company.
Method for preparing pure cerium hydroxide
PatentNo.: 89 103858.2 Patent application date:1June 989 19 Patent holder: Gansu Rare Earth Company.
Grouping method for stepwise extraction of gadolinium, terbium, dysprosium and yttrium
PatentNo.: 89 103296.7 Patent application date:1May 20, 989 Patent holder: Gansu Rare Earth Company.
Preparation of high purity terbium by solvent extraction and separation
PatentNo.: 89 103537.0 Patent application date:1June 2, 989 Patent holder: Gansu Rare Earth Company.
Method for separating heavy metals from rare earth solution
PatentNo.: 89101083.1patent application date:1March 989 15 Patent holder: Gansu Rare Earth Company.
Method for extracting and separating silicon, calcium and lanthanum from yttrium
PatentNo.: 89 10 1477.2 Patent application date:1March 20, 989 Patent holder: Gansu Rare Earth Company.
Preparation technology of europium sulfate
PatentNo.: 89 103594.4 Patent application date:1July 987 18 Patent holder: Gansu Rare Earth Company.
Preparation method of rare earth fluoride
PatentNo.: 89 104555.4 Patent application date:1July 7, 989 Patent holder: Gansu Rare Earth Company.
Anti-deformation reinforced box-type mixed clarification extractor
PatentNo.: 89202 192.6 Patent application date:1March 3, 989, patentee: Gansu Rare Earth Company.
Large horizontal box-type mixed clarification extractor
PatentNo.: 89202 193.4 Patent application date:1March 3, 989, patentee: Gansu Rare Earth Company.