GB1422363A - Hydrogen fluoride removal proces - Google Patents

Hydrogen fluoride removal proces

Info

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
Application number
GB2450673A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Honeywell UOP LLC
Original Assignee
UOP LLC
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by UOP LLC filed Critical UOP LLC
Publication of GB1422363A publication Critical patent/GB1422363A/en
Expired legal-status Critical Current

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.
GB2450673A 1972-05-24 1973-05-23 Hydrogen fluoride removal proces Expired GB1422363A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3699209A (en) * 1971-02-26 1972-10-17 Universal Oil Prod Co Hf removal system

Cited By (1)

* Cited by examiner, † Cited by third party
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