US2693445A - Electrolytic method for production of fluorine - Google Patents
Electrolytic method for production of fluorine Download PDFInfo
- Publication number
- US2693445A US2693445A US115456A US11545649A US2693445A US 2693445 A US2693445 A US 2693445A US 115456 A US115456 A US 115456A US 11545649 A US11545649 A US 11545649A US 2693445 A US2693445 A US 2693445A
- Authority
- US
- United States
- Prior art keywords
- carbon
- fluorine
- anode
- permeability
- electrolyte
- 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 - Lifetime
Links
- 229910052731 fluorine Inorganic materials 0.000 title claims description 16
- 239000011737 fluorine Substances 0.000 title claims description 16
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 title claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 21
- 229910052799 carbon Inorganic materials 0.000 claims description 21
- 230000035699 permeability Effects 0.000 claims description 17
- 239000003792 electrolyte Substances 0.000 claims description 14
- 238000005868 electrolysis reaction Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 6
- POHFBTRVASILTB-UHFFFAOYSA-M potassium;fluoride;dihydrofluoride Chemical compound F.F.[F-].[K+] POHFBTRVASILTB-UHFFFAOYSA-M 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 claims description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 12
- 150000002222 fluorine compounds Chemical class 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 3
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000011876 fused mixture Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 210000002837 heart atrium Anatomy 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910000040 hydrogen fluoride Inorganic materials 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/24—Halogens or compounds thereof
- C25B1/245—Fluorine; Compounds thereof
Definitions
- a process for the production of fluorine comprises the electrolysis of substantially drv fused fluorides e. g. of the approximate composition KF.2HF, using as the anode a carbon of permeability not less than 5.
- a cell suitable for carryin out the invention is shown in the attached drawin which represents a vertical section through the s id cell.
- Ref rring to the drawing, 1 is a container of mild steel or other suitablv resistant material this container being closed by a lid 2 of similar material.
- the anode 3 is of carbon of the required per Patented Nov. 2, 1954 meability and is supported by an electrically-conducting rod 6 which passes through the lid 2 and is insulated therefrom by an insulator 4.
- the said anode is only partially immersed in the electrolyte 9 as illustrated by the drawing.
- the cathode 5 At a distance from the anode, and wholly or partially surrounding it, is the cathode 5, which may be of mild steel, copper or other material substantially resistant to the electrolyte and products of electrolysis.
- the cathode is supported by an electrically-conducting rod 7, which rod is insulated from the cell lid through which it passes. Between the anode and cathode is a diaphragm or skirt 8 which depends from the cell lid and dips into the electrolyte 9, thus serving to keep separate the gases evolved at the electrodes. Exits 10 and 11 through the cell lid are provided for the fluorine and hydrogen evolved at the anode and cathode respectively. Heating means not shown are also provided.
- Example A cell of the kind described was fitted with an anode 13 /2 x 13 /2" x 3" constructed of carbon of permeability 37.5.
- the electrolyte was of the approximate composition KF.2HF and contained initially less than 0.5% of water.
- the electrolysis was warmed to about 75 C. and throughout operation was maintained between this temperature and C.
- the electrolysis was continued for 3,000 hours during which time the HF content of the electrolyte was maintained between 40% and 42% by periodic additions of anhydrous hydrogen fluoride. At the end of 3,000 hours the cell was still giving fluorine of excellent quality and there was no indication of polarisation.
- a process for the production of fluorine comprising electrolyzing substantially dry mixtures of fused fluorides of the approximate composition KF.2HF, the said electrolysis being effected in a container of suitably resistant material between a cathode of material resistant to the action of the electrolyte, and an anode of porous carbon only partially immersed in said electrolyte, said carbon having a permeability of not less than 5, the unit of permeability being expressed in terms of the number of cubic feet of air which can be passed per square foot of surface through one inch thickness of the carbon per minute under an imposed pressure of two inches of water and removing the generated fluorine from the space above the anode.
- a process for the production of fluorine comprising electrolyzing in a suitable container substantially dry fused mixtures of fluorides of the approximate composition KF.2HF, the cathode being of material resistant to the action of the electrolyte and the anode being only partially immersed in the said electrolyte and being of carbon of permeability greater than 20, the unit of permeability being expressed in terms of the number of cubic feet of air which can be passed per square foot of surface through a one inch thickness of the carbon per minute under an imposed pressure of two inches of water and removing the generated fluorine from the space above the anode.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB25149/48A GB655098A (en) | 1948-09-27 | 1948-09-27 | Improvements in or relating to electrolysis of fluorine salts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2693445A true US2693445A (en) | 1954-11-02 |
Family
ID=10223025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US115456A Expired - Lifetime US2693445A (en) | 1948-09-27 | 1949-09-13 | Electrolytic method for production of fluorine |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2693445A (de) |
| AT (1) | AT167844B (de) |
| DE (1) | DE846993C (de) |
| FR (1) | FR996272A (de) |
| GB (1) | GB655098A (de) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2996446A (en) * | 1958-01-06 | 1961-08-15 | Ici Ltd | Apparatus for the electrolytic production of fluorine |
| US3000801A (en) * | 1958-07-30 | 1961-09-19 | Ici Ltd | Process for the electrolytic production of fluorine |
| US3033767A (en) * | 1958-09-02 | 1962-05-08 | Dow Chemical Co | Preparation of fluorocarbons |
| US3320140A (en) * | 1963-12-13 | 1967-05-16 | Allied Chem | Electrolytic production of fluorine |
| US4511440A (en) * | 1983-12-22 | 1985-04-16 | Allied Corporation | Process for the electrolytic production of fluorine and novel cell therefor |
| CN104532289A (zh) * | 2015-01-07 | 2015-04-22 | 黎明化工研究设计院有限责任公司 | 一种电解制氟用阳极 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5623285A (en) * | 1979-08-02 | 1981-03-05 | Nobuatsu Watanabe | Production of fluorine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1309148A (en) * | 1919-07-08 | mighbi | ||
| US2194443A (en) * | 1937-10-04 | 1940-03-19 | Du Pont | Anode for electrolytic cells |
| US2506438A (en) * | 1946-05-14 | 1950-05-02 | Atomic Energy Commission | Electrolytic process for production of fluorine |
| US2540960A (en) * | 1946-06-03 | 1951-02-06 | Sidney G Osborne | Electrolytic cell |
| US2592144A (en) * | 1948-05-14 | 1952-04-08 | Ici Ltd | Process for the electrolytic production of fluorine |
-
1948
- 1948-09-27 GB GB25149/48A patent/GB655098A/en not_active Expired
-
1949
- 1949-09-13 US US115456A patent/US2693445A/en not_active Expired - Lifetime
- 1949-09-17 DE DEP4211D patent/DE846993C/de not_active Expired
- 1949-09-26 FR FR996272D patent/FR996272A/fr not_active Expired
- 1949-09-27 AT AT167844D patent/AT167844B/de active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1309148A (en) * | 1919-07-08 | mighbi | ||
| US2194443A (en) * | 1937-10-04 | 1940-03-19 | Du Pont | Anode for electrolytic cells |
| US2506438A (en) * | 1946-05-14 | 1950-05-02 | Atomic Energy Commission | Electrolytic process for production of fluorine |
| US2540960A (en) * | 1946-06-03 | 1951-02-06 | Sidney G Osborne | Electrolytic cell |
| US2592144A (en) * | 1948-05-14 | 1952-04-08 | Ici Ltd | Process for the electrolytic production of fluorine |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2996446A (en) * | 1958-01-06 | 1961-08-15 | Ici Ltd | Apparatus for the electrolytic production of fluorine |
| US3000801A (en) * | 1958-07-30 | 1961-09-19 | Ici Ltd | Process for the electrolytic production of fluorine |
| US3033767A (en) * | 1958-09-02 | 1962-05-08 | Dow Chemical Co | Preparation of fluorocarbons |
| US3320140A (en) * | 1963-12-13 | 1967-05-16 | Allied Chem | Electrolytic production of fluorine |
| US4511440A (en) * | 1983-12-22 | 1985-04-16 | Allied Corporation | Process for the electrolytic production of fluorine and novel cell therefor |
| CN104532289A (zh) * | 2015-01-07 | 2015-04-22 | 黎明化工研究设计院有限责任公司 | 一种电解制氟用阳极 |
Also Published As
| Publication number | Publication date |
|---|---|
| AT167844B (de) | 1951-03-10 |
| GB655098A (en) | 1951-07-11 |
| FR996272A (fr) | 1951-12-17 |
| DE846993C (de) | 1952-08-18 |
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