GB891276A - Process for the manufacture of potassium fluoride, hydrogen fluoride and silica from potassium fluosilicate - Google Patents
Process for the manufacture of potassium fluoride, hydrogen fluoride and silica from potassium fluosilicateInfo
- Publication number
- GB891276A GB891276A GB37200/60A GB3720060A GB891276A GB 891276 A GB891276 A GB 891276A GB 37200/60 A GB37200/60 A GB 37200/60A GB 3720060 A GB3720060 A GB 3720060A GB 891276 A GB891276 A GB 891276A
- Authority
- GB
- United Kingdom
- Prior art keywords
- fluoride
- potassium
- silica
- ammonia
- potassium fluoride
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B7/00—Halogens; Halogen acids
- C01B7/19—Fluorine; Hydrogen fluoride
- C01B7/191—Hydrogen fluoride
- C01B7/193—Preparation from silicon tetrafluoride, fluosilicic acid or fluosilicates
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/113—Silicon oxides; Hydrates thereof
- C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
- C01B33/18—Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof
- C01B33/186—Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof from or via fluosilicic acid or salts thereof by a wet process
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D3/00—Halides of sodium, potassium or alkali metals in general
- C01D3/02—Fluorides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
- C01P2006/82—Compositional purity water content
Abstract
Potassium fluoride, hydrogen fluoride and silica are produced by reacting potassium fluosilicate with ammonia and water to obtain an aqueous solution of potassium fluoride and ammonium fluoride and a precipitate of silica in a first step, mixing the solution, after removal of the silica, with an amount of potassium fluoride substantially equal to that contained in the solution, concentrating the solution to obtain a precipitate of acid potassium fluoride and evaporate the ammonia in a second step, and decomposing the acid potassium fluoride by heat to yield potassium fluoride and hydrogen fluoride in a third step. In Example 1, gaseous ammonia is introduced into an aqueous suspension of potassium fluosilicate (obtained by reacting effluents from superphosphate manufacture with KCl), the temperature rising to 70 DEG -90 DEG C. The reaction liquor is decanted from undecomposed potassium fluosilicate, which is recycled to the next batch, and is filtered to remove suspended silica, which is washed with hot water. The filtrate containing KF and NH4F is mixed with a quantity of KF equal to that of the contained KF and is evaporated to dryness to drive off the ammonia, which is recycled to the next batch. The residue, acid potassium fluoride, is heated to 500 DEG C. to drive off anhydrous HF, which is recovered as such or by absorption in water or in solid alkali fluoride. Half of the KF residue is withdrawn as final product, while the other half is recycled to step (2). In Example 2, aqueous ammonia is gradually added to an aqueous suspension of potassium fluosilicate heated to 80 DEG C., and the process is continued as in Example 1. Specification 765,901 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IL891276X | 1959-12-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB891276A true GB891276A (en) | 1962-03-14 |
Family
ID=11059646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB37200/60A Expired GB891276A (en) | 1959-12-11 | 1960-10-28 | Process for the manufacture of potassium fluoride, hydrogen fluoride and silica from potassium fluosilicate |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB891276A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111017937A (en) * | 2019-12-31 | 2020-04-17 | 贵州瓮福蓝天氟化工股份有限公司 | Method for preparing potassium fluoride and co-producing ultrafine white carbon black |
| CN112174168A (en) * | 2020-10-21 | 2021-01-05 | 承德莹科精细化工股份有限公司 | Method for preparing high-purity potassium fluoride by reacting potassium water glass with fluosilicic acid or potassium fluosilicate |
| CN112551531A (en) * | 2020-11-24 | 2021-03-26 | 浙江巨化技术中心有限公司 | Method for coproducing hydrogen fluoride, white carbon black and potassium sulfate |
| CN112897466A (en) * | 2020-10-27 | 2021-06-04 | 贵州省化工研究院 | Method for producing anhydrous hydrogen fluoride by using fluosilicic acid in phosphoric acid |
| CN113086993A (en) * | 2021-04-15 | 2021-07-09 | 严永生 | Process method for preparing potassium fluoride by decomposing fluosilicic acid through electrodialysis |
| CN114031100A (en) * | 2021-12-20 | 2022-02-11 | 湖北祥云(集团)化工股份有限公司 | Method for preparing fluoride salt from phosphorus ore associated fluorine |
-
1960
- 1960-10-28 GB GB37200/60A patent/GB891276A/en not_active Expired
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111017937A (en) * | 2019-12-31 | 2020-04-17 | 贵州瓮福蓝天氟化工股份有限公司 | Method for preparing potassium fluoride and co-producing ultrafine white carbon black |
| CN112174168A (en) * | 2020-10-21 | 2021-01-05 | 承德莹科精细化工股份有限公司 | Method for preparing high-purity potassium fluoride by reacting potassium water glass with fluosilicic acid or potassium fluosilicate |
| CN112897466A (en) * | 2020-10-27 | 2021-06-04 | 贵州省化工研究院 | Method for producing anhydrous hydrogen fluoride by using fluosilicic acid in phosphoric acid |
| CN112551531A (en) * | 2020-11-24 | 2021-03-26 | 浙江巨化技术中心有限公司 | Method for coproducing hydrogen fluoride, white carbon black and potassium sulfate |
| CN113086993A (en) * | 2021-04-15 | 2021-07-09 | 严永生 | Process method for preparing potassium fluoride by decomposing fluosilicic acid through electrodialysis |
| CN114031100A (en) * | 2021-12-20 | 2022-02-11 | 湖北祥云(集团)化工股份有限公司 | Method for preparing fluoride salt from phosphorus ore associated fluorine |
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