GB709610A - Improvements in or relating to the preparation of hexafluorophosphoric acid - Google Patents
Improvements in or relating to the preparation of hexafluorophosphoric acidInfo
- Publication number
- GB709610A GB709610A GB18614/52A GB1861452A GB709610A GB 709610 A GB709610 A GB 709610A GB 18614/52 A GB18614/52 A GB 18614/52A GB 1861452 A GB1861452 A GB 1861452A GB 709610 A GB709610 A GB 709610A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sulphur dioxide
- liquid
- phosphorus pentafluoride
- hydrogen fluoride
- hexafluorophosphoric acid
- 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
- C01B25/00—Phosphorus; Compounds thereof
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/10—Halides or oxyhalides of phosphorus
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Hexafluorophosphoric acid is prepared by reacting phosphorus pentafluoride and hydrogen fluoride in liquid sulphur dioxide. Gaseous phosphorus pentafluoride may be passed through a liquid mixture of sulphur dioxide and hydrogen fluoride at -30 to -15 DEG C., although higher temperatures even above 20 DEG C. may be used. The ratio SO2 : HF should be 1 : 1 at -20 DEG C., or higher at higher temperature, and lower at lower temperature. The sulphur dioxide is distilled off after the reaction leaving the liquid hexafluorophosphoric acid. The reaction may be effected also between gaseous or liquid hydrogen fluoride and a solution of phosphorus pentafluoride in sulphur dioxide, or by adding hydrogen fluoride and phosphorus pentafluoride simultaneously to liquid sulphur dioxide. The phosphorus pentafluoride is prepared by heating water-free calcium fluoride with phosphorus pentoxide in a steel retort.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL709610X | 1951-07-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB709610A true GB709610A (en) | 1954-05-26 |
Family
ID=19812164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB18614/52A Expired GB709610A (en) | 1951-07-25 | 1952-07-23 | Improvements in or relating to the preparation of hexafluorophosphoric acid |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE957388C (en) |
| FR (1) | FR1060545A (en) |
| GB (1) | GB709610A (en) |
| NL (1) | NL73991C (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE812247C (en) * | 1949-03-31 | 1951-08-27 | Bayer Ag | Production of hexafluorophosphoric acid and its salts |
-
0
- NL NL73991D patent/NL73991C/xx active
-
1952
- 1952-07-23 GB GB18614/52A patent/GB709610A/en not_active Expired
- 1952-07-23 FR FR1060545D patent/FR1060545A/en not_active Expired
- 1952-07-24 DE DEN5841A patent/DE957388C/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE957388C (en) | 1957-01-31 |
| NL73991C (en) | |
| FR1060545A (en) | 1954-04-02 |
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