公开(公告)号：US4089936A

公开(公告)日：1978-05-16

申请号：US725045

申请日：1976-09-20

申请人： William Henry Thompson ,  Ralph Eric Worthington ,  David John Stamper

发明人： William Henry Thompson ,  Ralph Eric Worthington ,  David John Stamper

IPC分类号： C01B7/19 ,  C01B7/22 ,  C01D3/00 ,  C01D3/02

CPC分类号： C01B7/194

摘要： Ammonium fluoride is converted into a bifluoride by reaction with KF to form KF.HF, converting the latter to NaF.HF and heating said sodium bifluoride to form a solid product comprising NaF.

摘要翻译： 通过与KF反应将氟化铵转化成二氟化物以形成KF.HF，将其转化成NaF.HF并加热所述二氟化钠以形成包含NaF的固体产物。

公开(公告)号：US4062929A

公开(公告)日：1977-12-13

申请号：US609299

申请日：1975-09-02

申请人： William Henry Thompson ,  Ralph Eric Worthington ,  David John Stamper

发明人： William Henry Thompson ,  Ralph Eric Worthington ,  David John Stamper

IPC分类号： C01B7/19 ,  C01B7/22 ,  C01B33/12 ,  C01C1/16 ,  C01D3/02

CPC分类号： C01B7/194

摘要： Hydrogen fluoride is produced from hydrofluosilicic acid. The hydrofluosilicic acid is reacted with ammonia. An aqueous solution of ammonium fluoride thus produced is fed with partly recycled alkali metal fluoride to a continuously operated reactor where a bifluoride of the alkali metal is formed in aqueous solution. Reaction mixture is continuously withdrawn and solid alkali metal bifluoride crystallized therefrom. The mother liquor is recycled to the reactor. The solid alkali metal bifluoride is decomposed by heat to produce hydrogen fluoride and solid alkali metal fluoride. The alkali metal fluoride is recycled to the reactor.

摘要翻译： 氟化氢由氢氟硅酸生产。 氢氟硅酸与氨反应。 将由此产生的氟化铵水溶液与部分再循环的碱金属氟化物一起加入到在水溶液中形成碱金属的氟化物的连续操作的反应器中。 反应混合物连续取出，固体碱金属二氟化物由其结晶。 母液被回收到反应器中。 固体碱金属二氟化物通过热分解产生氟化氢和固体碱金属氟化物。 将碱金属氟化物再循环到反应器中。

公开(公告)号：US4056604A

公开(公告)日：1977-11-01

申请号：US389572

申请日：1973-08-20

申请人： William Henry Thompson ,  Ralph Eric Worthington ,  David John Stamper

发明人： William Henry Thompson ,  Ralph Eric Worthington ,  David John Stamper

IPC分类号： C01B7/19 ,  C01B7/22 ,  C01D3/02

CPC分类号： C01B7/194

摘要： Hydrogen fluoride is recovered from hydrofluosilicic acid by-product of phosphoric acid manufacture. The hydrofluosilicic acid effluent is reacted with ammonia to form ammonium fluoride which is converted to a bifluoride by reaction with an excess of soluble metal fluoride. The bifluoride is readily recoverable and decomposable to yield hydrogen fluoride.

摘要翻译： 氢氟酸从磷酸生产的氢氟硅酸副产物中回收。 将氢氟硅酸流出物与氨反应形成氟化铵，通过与过量的可溶性金属氟化物反应而转化为氟化氢。 二氟化物易于回收和分解以产生氟化氢。

公开(公告)号：US4067957A

公开(公告)日：1978-01-10

申请号：US703519

申请日：1976-07-08

申请人： Ralph Eric Worthington ,  Padraic Seamus O'Neill

发明人： Ralph Eric Worthington ,  Padraic Seamus O'Neill

IPC分类号： C01B7/19 ,  C01B7/22

CPC分类号： C01B7/193

摘要： Potassium fluoride and silica are reacted with an aqueous solution of hydrofluorosilicic acid. The resulting potassium fluorosilicate is recovered. The potassium fluorosilicate may be further reacted with ammonia in water to form an aqueous mixture of ammonium fluoride and potassium fluoride. The ammonium fluoride is then heated in aqueous solution in the presence of excess potassium fluoride to release ammonia and to form potassium bifluoride. The potassium bifluoride is recovered from solution substantially free from ammonia and heated to release hydrogen fluoride. Alternatively, the recovered potassium bifluoride may be reacted with sodium fluoride to produce sodium bifluoride. The sodium bifluoride is then heated to release hydrogen fluoride.

摘要翻译： 将氟化钾和二氧化硅与氢氟硅酸的水溶液反应。 回收所得的氟硅酸钾。 氟硅酸钾可以进一步与氨在水中反应形成氟化铵和氟化钾的含水混合物。 然后在过量的氟化钾存在下，在水溶液中加热氟化铵以释放氨并形成二氟化钾。 从基本上不含氨的溶液中回收氟化钾，并加热以释放氟化氢。 或者，回收的二氟化钾可与氟化钠反应产生二氟化钠。 然后加热氟化氢以释放氟化氢。