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1. 发明授权

US3195979A Process of preparing hydrogen fluoride from fluosilicic acid 失效
标题翻译：从氟硅酸制备氟化氢的工艺
公开(公告)号：US3195979A
公开(公告)日：1965-07-20
申请号：US16020261
申请日：1961-12-18
申请人： INT MINERALS & CHEM CORP
发明人： BURKERT GEORGE M , BAUMANN ARTHUR N
IPC分类号： C01B7/19 , C01C1/16
CPC分类号： C01C1/162 , C01B7/193

2. 发明授权

US3271107A Silica pigments from fluosilicic acid 失效
标题翻译：来自氟硅酸的二氧化硅颜料
公开(公告)号：US3271107A
公开(公告)日：1966-09-06
申请号：US29885663
申请日：1963-07-31
申请人： INT MINERALS & CHEM CORP
发明人： NICKERSON JOHN D , BURKERT GEORGE M
IPC分类号： C01B33/18
CPC分类号： C01B33/186 , C01P2006/22 , C01P2006/80

3. 发明授权

US3134815A Production of amine fluorides 失效
标题翻译：胺氟化物的生产
公开(公告)号：US3134815A
公开(公告)日：1964-05-26
申请号：US85154059
申请日：1959-11-09
申请人： INT MINERALS & CHEM CORP
发明人： BURKERT GEORGE M , WALSH KENNETH A
CPC分类号： C07C209/68

4. 发明专利

CA786244A PROCESS FOR THE PRODUCTION OF FLUORINE COMPOUNDS FROM FLUOSILICIC ACID 未知
公开(公告)号：CA786244A
公开(公告)日：1968-05-28
申请号：CA786244D
申请人： INT MINERALS & CHEM CORP
发明人： BURKERT GEORGE M , BAUMANN ARTHUR N

5. 发明专利

DE1263718B 未知
公开(公告)号：DE1263718B
公开(公告)日：1968-03-21
申请号：DEJ0022581
申请日：1962-10-30
申请人： INT MINERALS & CHEM CORP
发明人： BURKERT GEORGE M , BAUMANN ARTHUR N
IPC分类号： C01B7/19 , C01C1/16
摘要： Fluosilicic acid is reacted with ammonia in aqueous solution to produce ammonium fluoride and hydrated silica, the ammonium fluoride as such or after conversion to ammonium bifluoride is reacted with alkali metal fluoride in aqueous solution to produce alkali metal bifluoride and ammonia or ammonium fluoride, and the alkali metal bifluoride is thermally decomposed to produce alkali metal fluoride and hydrofluoric acid. The ammonia or ammonium fluoride and alkali metal fluoride produced are recycled. A 5-60% stoichiometric excess of ammonia may be added to the fluosilicic acid with vigorous stirring at 30-170 DEG F. The ammonium fluoride produced may be converted to bifluoride at 250-410 DEG F. The alkali metal fluoride may be reacted as a powder of less than 70 mesh size. The reaction temperature may be 50-410 DEG F. for the reaction of ammonium fluoride, and 50-170 DEG F. for the reaction of ammoniumbifluoride. Ammonium fluoride may be reacted with potassium fluoride at 200-410 DEG F. to produce directly molten potassium bifluoride and gaseous ammonia. Ammonium bifluoride may be reacted with sodium fluoride at 50-170 DEG F. to produce crystals of sodium bifluoride which may be separated by decantation, filtration or certrifugation and then heated to drive off water and ammonium fluoride. The alkali metal bifluoride may be dried at below 550 DEG F. and decomposed at above 575 DEG F. The gaseous hydrofluoric acid produced may be condensed at below 80 DEG F.

6. 发明专利

CA658935A PRODUCTION OF FLUOALUMINATES 未知
公开(公告)号：CA658935A
公开(公告)日：1963-03-05
申请号：CA658935D
申请人： INT MINERALS & CHEM CORP
发明人： BURKERT GEORGE M

7. 发明专利

CA747289A SILICA PIGMENTS FROM FLUOSILICIC ACID 未知
公开(公告)号：CA747289A
公开(公告)日：1966-11-29
申请号：CA747289D
申请人： INT MINERALS & CHEM CORP
发明人： BURKERT GEORGE M , NICKERSON JOHN D

8. 发明专利

CA673178A PRODUCTION OF AMINE FLUORIDES 未知
公开(公告)号：CA673178A
公开(公告)日：1963-10-29
申请号：CA673178D
申请人： INT MINERALS & CHEM CORP
发明人： BURKERT GEORGE M , WALSH KENNETH A

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