GB1422363A - Hydrogen fluoride removal proces - Google Patents
Hydrogen fluoride removal procesInfo
- Publication number
- GB1422363A GB1422363A GB2450673A GB2450673A GB1422363A GB 1422363 A GB1422363 A GB 1422363A GB 2450673 A GB2450673 A GB 2450673A GB 2450673 A GB2450673 A GB 2450673A GB 1422363 A GB1422363 A GB 1422363A
- Authority
- GB
- United Kingdom
- Prior art keywords
- solution
- gas
- scrubber
- caf
- koh
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/68—Halogens or halogen compounds
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/20—Halides
- C01F11/22—Fluorides
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Geology (AREA)
- Biomedical Technology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Gas Separation By Absorption (AREA)
Abstract
1422363 Removal of HF from gases UOP Inc 23 May 1973 [24 May 1972] 24506/73 Heading C1A HF is removed from a gas by scrubbing with an AM hydroxide, the AM fluoride produced being converted to CaF 2 by Ca(OH) 2 ; the regenerated AM hydroxide is re-cycled. The gas may be relief gas from an HF catalysed alkylation unit and may contain hydrocarbons with 1 to 4 C atoms. KOH in 1-30% solution is the preferred absorbent. The Ca(OH) 2 may be added as a 0À1-2% solution or as the solid. In a typical apparatus the scrubber consists of a tower in two parts, the lower part being of larger diameter than the upper. The upper part is fitted with perforated trays and the lower with a heating coil. The HF containing gas is led in to the base of the upper part of the scrubber and leaves from the top. The absorbent solution may be led from the bottom of the scrubber to the top of either part of it directly or via the regenerator-settler, in which CaF 2 is formed and removed, or partly through each. Provision is made for using the solution for plant-neutralization purposes and means for adding Ca(OH) 2 and make-up KOH and water are provided.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US25623872A | 1972-05-24 | 1972-05-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1422363A true GB1422363A (en) | 1976-01-28 |
Family
ID=22971506
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2450673A Expired GB1422363A (en) | 1972-05-24 | 1973-05-23 | Hydrogen fluoride removal proces |
Country Status (8)
Country | Link |
---|---|
JP (1) | JPS5620895B2 (en) |
CA (1) | CA983241A (en) |
CS (1) | CS178902B2 (en) |
DE (1) | DE2325145C3 (en) |
ES (1) | ES415060A1 (en) |
FR (1) | FR2185590B1 (en) |
GB (1) | GB1422363A (en) |
IT (1) | IT986093B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6458333B1 (en) * | 1999-04-19 | 2002-10-01 | Bayer Aktiengesellschaft | Process for recycling alkali metal fluorides and/or difluorides |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52143971A (en) * | 1976-05-27 | 1977-11-30 | Dainippon Ink & Chem Inc | Treatment of exhaust gas containing hydrogen fluorid e etc. |
US8710282B2 (en) * | 2008-03-14 | 2014-04-29 | Honeywell International Inc. | Integrated process for the manufacture of fluorinated olefins |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3699209A (en) * | 1971-02-26 | 1972-10-17 | Universal Oil Prod Co | Hf removal system |
-
1973
- 1973-05-11 CA CA171,071A patent/CA983241A/en not_active Expired
- 1973-05-18 DE DE19732325145 patent/DE2325145C3/en not_active Expired
- 1973-05-21 IT IT5010673A patent/IT986093B/en active
- 1973-05-21 FR FR7318399A patent/FR2185590B1/fr not_active Expired
- 1973-05-23 ES ES415060A patent/ES415060A1/en not_active Expired
- 1973-05-23 GB GB2450673A patent/GB1422363A/en not_active Expired
- 1973-05-23 CS CS370573A patent/CS178902B2/en unknown
- 1973-05-24 JP JP5730573A patent/JPS5620895B2/ja not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6458333B1 (en) * | 1999-04-19 | 2002-10-01 | Bayer Aktiengesellschaft | Process for recycling alkali metal fluorides and/or difluorides |
Also Published As
Publication number | Publication date |
---|---|
JPS4949896A (en) | 1974-05-15 |
FR2185590B1 (en) | 1976-04-23 |
IT986093B (en) | 1975-01-10 |
DE2325145C3 (en) | 1979-05-31 |
DE2325145A1 (en) | 1973-12-20 |
JPS5620895B2 (en) | 1981-05-16 |
ES415060A1 (en) | 1976-05-01 |
DE2325145B2 (en) | 1978-10-05 |
CA983241A (en) | 1976-02-10 |
FR2185590A1 (en) | 1974-01-04 |
CS178902B2 (en) | 1977-10-31 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |