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FR2370685A1 - PROCESS FOR SEPARATING HYDROGEN FLUORIDE FROM ITS MIXTURES WITH OTHER ACID GASES - Google Patents

PROCESS FOR SEPARATING HYDROGEN FLUORIDE FROM ITS MIXTURES WITH OTHER ACID GASES

Info

Publication number
FR2370685A1
FR2370685A1 FR7733884A FR7733884A FR2370685A1 FR 2370685 A1 FR2370685 A1 FR 2370685A1 FR 7733884 A FR7733884 A FR 7733884A FR 7733884 A FR7733884 A FR 7733884A FR 2370685 A1 FR2370685 A1 FR 2370685A1
Authority
FR
France
Prior art keywords
hydrogen fluoride
acid gases
mixtures
gases
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.)
Pending
Application number
FR7733884A
Other languages
French (fr)
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 Riedel de Haen AG
Original Assignee
Riedel de Haen AG
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 Riedel de Haen AG filed Critical Riedel de Haen AG
Publication of FR2370685A1 publication Critical patent/FR2370685A1/en
Pending 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
    • B01D53/14—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 by absorption
    • B01D53/1493—Selection of liquid materials for use as absorbents
    • 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
    • B01D53/14—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 by absorption
    • B01D53/1456—Removing acid components
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Silicon Compounds (AREA)
  • Treating Waste Gases (AREA)

Abstract

Procédé de séparation du fluorure d'hydrogène de ses mélanges avec d'autres gaz acides. Le mélange gazeux contenant le fluorure d'hydrogène et les autres gaz acides, le cas échéant avec des gaz inertes, traverse dans une première étape opérationnelle 1 de l'acide sulfurique à 75-85 % en poids de preférence, à basse température, acide qui absorbe sélectivement la majeure partie du fluorure d'hydrogène du mélange gazeux, puis, dans une seconde étape opérationnelle 4, on insuffle un courant de gaz inerte dans l'acide sulfurique contenant le fluorure d'hydrogène, à température élevée, courant de gaz inerte qui élimine de l'acide sulfurique, le fluorure d'hydrogène débarrassé des autres gaz acides.Process for separating hydrogen fluoride from its mixtures with other acid gases. The gas mixture containing hydrogen fluoride and the other acid gases, where appropriate with inert gases, passes through in a first operational stage 1 sulfuric acid at 75-85% by weight preferably, at low temperature, acidic. which selectively absorbs the major part of the hydrogen fluoride from the gas mixture, then, in a second operational step 4, a stream of inert gas is blown into the sulfuric acid containing the hydrogen fluoride, at high temperature, gas stream inert which eliminates sulfuric acid, hydrogen fluoride freed from other acid gases.

FR7733884A 1976-11-12 1977-11-10 PROCESS FOR SEPARATING HYDROGEN FLUORIDE FROM ITS MIXTURES WITH OTHER ACID GASES Pending FR2370685A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19762651630 DE2651630A1 (en) 1976-11-12 1976-11-12 PROCESS FOR THE SEPARATION OF HYDROFLUOR FROM MIXTURES WITH ACID GASES

Publications (1)

Publication Number Publication Date
FR2370685A1 true FR2370685A1 (en) 1978-06-09

Family

ID=5993002

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7733884A Pending FR2370685A1 (en) 1976-11-12 1977-11-10 PROCESS FOR SEPARATING HYDROGEN FLUORIDE FROM ITS MIXTURES WITH OTHER ACID GASES

Country Status (4)

Country Link
DE (1) DE2651630A1 (en)
FR (1) FR2370685A1 (en)
GB (1) GB1556837A (en)
NL (1) NL7712244A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007147987A1 (en) * 2006-06-21 2007-12-27 Arkema France Method of recovering hydrofluoric acid
WO2013050690A1 (en) * 2011-10-06 2013-04-11 Arkema France Method of recycling hydrochloric and hydrofluoric acid effluent

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN114345106B (en) * 2021-12-30 2023-12-12 湖北瓮福蓝天化工有限公司 Method and system for removing chlorine element in anhydrous hydrogen fluoride production process

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR741966A (en) * 1931-09-02 1933-02-23
FR1150956A (en) * 1956-05-23 1958-01-22 Pechiney Concentration and purification of hydrofluoric acid
FR1342891A (en) * 1961-10-02 1963-11-15 Stauffer Chemical Co Process for extracting hydrofluoric acid from a dilute aqueous solution
US3218127A (en) * 1962-09-10 1965-11-16 Tennessee Corp Process of producing hydrogen fluoride in a two-stage procedure and effecting a rapid evolution of the hydrogen fluoride by sweeping the second stage with an inert gas
FR2340272A1 (en) * 1976-02-04 1977-09-02 Riedel De Haen Ag Hydrogen fluoride obtd. from waste or byprods. - by adding sulphuric acid and injecting air to remove the hydrogen fluoride

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR741966A (en) * 1931-09-02 1933-02-23
FR1150956A (en) * 1956-05-23 1958-01-22 Pechiney Concentration and purification of hydrofluoric acid
FR1342891A (en) * 1961-10-02 1963-11-15 Stauffer Chemical Co Process for extracting hydrofluoric acid from a dilute aqueous solution
US3218127A (en) * 1962-09-10 1965-11-16 Tennessee Corp Process of producing hydrogen fluoride in a two-stage procedure and effecting a rapid evolution of the hydrogen fluoride by sweeping the second stage with an inert gas
FR2340272A1 (en) * 1976-02-04 1977-09-02 Riedel De Haen Ag Hydrogen fluoride obtd. from waste or byprods. - by adding sulphuric acid and injecting air to remove the hydrogen fluoride

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007147987A1 (en) * 2006-06-21 2007-12-27 Arkema France Method of recovering hydrofluoric acid
FR2902780A1 (en) * 2006-06-21 2007-12-28 Arkema France PROCESS FOR RECOVERING FLUORHYDRIC ACID
WO2013050690A1 (en) * 2011-10-06 2013-04-11 Arkema France Method of recycling hydrochloric and hydrofluoric acid effluent
FR2981060A1 (en) * 2011-10-06 2013-04-12 Arkema France PROCESS FOR THE VALORISATION OF THE EFFLUENTS OF CHLOROFLUORHYDRIC ACID
US9783427B2 (en) 2011-10-06 2017-10-10 Arkema France Method of recycling hydrochloric and hydrofluoric acid effluent

Also Published As

Publication number Publication date
NL7712244A (en) 1978-05-17
GB1556837A (en) 1979-11-28
DE2651630A1 (en) 1978-05-24

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