EP2029478A1 - Procede de recuperation de l'acide fluorhydrique - Google Patents
Procede de recuperation de l'acide fluorhydriqueInfo
- Publication number
- EP2029478A1 EP2029478A1 EP07766077A EP07766077A EP2029478A1 EP 2029478 A1 EP2029478 A1 EP 2029478A1 EP 07766077 A EP07766077 A EP 07766077A EP 07766077 A EP07766077 A EP 07766077A EP 2029478 A1 EP2029478 A1 EP 2029478A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hydrofluoric acid
- stream
- compression
- temperature
- recovering
- 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.)
- Withdrawn
Links
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000006835 compression Effects 0.000 claims abstract description 13
- 238000007906 compression Methods 0.000 claims abstract description 13
- 238000000926 separation method Methods 0.000 claims description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 4
- 150000002894 organic compounds Chemical class 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims 1
- 229960002050 hydrofluoric acid Drugs 0.000 description 14
- 239000007789 gas Substances 0.000 description 7
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- 238000003682 fluorination reaction Methods 0.000 description 3
- 239000007792 gaseous phase Substances 0.000 description 3
- 239000007791 liquid phase Substances 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- RWRIWBAIICGTTQ-UHFFFAOYSA-N difluoromethane Chemical compound FCF RWRIWBAIICGTTQ-UHFFFAOYSA-N 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- 238000009713 electroplating Methods 0.000 description 2
- NNPPMTNAJDCUHE-UHFFFAOYSA-N isobutane Chemical compound CC(C)C NNPPMTNAJDCUHE-UHFFFAOYSA-N 0.000 description 2
- LVGUZGTVOIAKKC-UHFFFAOYSA-N 1,1,1,2-tetrafluoroethane Chemical compound FCC(F)(F)F LVGUZGTVOIAKKC-UHFFFAOYSA-N 0.000 description 1
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 1
- BOUGCJDAQLKBQH-UHFFFAOYSA-N 1-chloro-1,2,2,2-tetrafluoroethane Chemical compound FC(Cl)C(F)(F)F BOUGCJDAQLKBQH-UHFFFAOYSA-N 0.000 description 1
- OHMHBGPWCHTMQE-UHFFFAOYSA-N 2,2-dichloro-1,1,1-trifluoroethane Chemical compound FC(F)(F)C(Cl)Cl OHMHBGPWCHTMQE-UHFFFAOYSA-N 0.000 description 1
- CYXIKYKBLDZZNW-UHFFFAOYSA-N 2-Chloro-1,1,1-trifluoroethane Chemical compound FC(F)(F)CCl CYXIKYKBLDZZNW-UHFFFAOYSA-N 0.000 description 1
- XWCDCDSDNJVCLO-UHFFFAOYSA-N Chlorofluoromethane Chemical compound FCCl XWCDCDSDNJVCLO-UHFFFAOYSA-N 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- CYTYCFOTNPOANT-UHFFFAOYSA-N Perchloroethylene Chemical group ClC(Cl)=C(Cl)Cl CYTYCFOTNPOANT-UHFFFAOYSA-N 0.000 description 1
- 229910052770 Uranium Inorganic materials 0.000 description 1
- 238000005804 alkylation reaction Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- IAQRGUVFOMOMEM-UHFFFAOYSA-N butene Natural products CC=CC IAQRGUVFOMOMEM-UHFFFAOYSA-N 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- -1 for example Chemical class 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000001282 iso-butane Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- GTLACDSXYULKMZ-UHFFFAOYSA-N pentafluoroethane Chemical compound FC(F)C(F)(F)F GTLACDSXYULKMZ-UHFFFAOYSA-N 0.000 description 1
- 238000005504 petroleum refining Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 229950011008 tetrachloroethylene Drugs 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
-
- 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
- C01B7/195—Separation; Purification
- C01B7/196—Separation; Purification by distillation
-
- 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
- B01D53/002—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 condensation
-
- 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
- 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
- C01B7/195—Separation; Purification
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/20—Halogens or halogen compounds
- B01D2257/204—Inorganic halogen compounds
- B01D2257/2047—Hydrofluoric acid
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/30—Capture or disposal of greenhouse gases of perfluorocarbons [PFC], hydrofluorocarbons [HFC] or sulfur hexafluoride [SF6]
Definitions
- the present invention relates to a method of treating a stream comprising hydrofluoric acid. More particularly, it relates to a process for recovering hydrofluoric acid.
- hydrofluoric acid Due to its ability to dissolve oxides, hydrofluoric acid is an important reagent in aluminum and uranium purification processes. It is also used to attack glass, and as catalyst isobutane and butene alkylation reactions in petroleum refining.
- electroplating plants In electroplating plants, it is used in some surface processes, metal oxide etching, electrochemical polishing and in various types of electroplating.
- Hydrofluoric acid is also used in the synthesis of many organic compounds containing fluorine, including tetrafluoroethylene and gases used in refrigeration such as hydrofluorocarbons.
- the present invention provides a process for recovering hydrofluoric acid comprising at least one compression step.
- the process according to the present invention is characterized in that it comprises at least one step of compressing a gaseous flow comprising hydrofluoric acid, the temperature of said flow before the compression step is between -20 and 100 ° vs.
- the hydrofluoric acid content present in the stream subjected to the compression step is preferably between 10 and 90% by weight.
- the stream may comprise hydrochloric acid and / or organic compounds such as, for example, pentafluoroethane, tetrafluoroethane, dichlorotrifluoroethane, chlorotetrafluoroethane, difluoromethane, perchlorethylene, dichloromethane, chlorofluoromethane and chlorotrifluoroethane.
- hydrochloric acid and / or organic compounds such as, for example, pentafluoroethane, tetrafluoroethane, dichlorotrifluoroethane, chlorotetrafluoroethane, difluoromethane, perchlorethylene, dichloromethane, chlorofluoromethane and chlorotrifluoroethane.
- the gaseous stream comprising hydrofluoric acid can come from a liquid phase or gas phase fluorination reactor.
- the stream to be treated comes from a high temperature gas phase fluorination reactor, prior to the compression step, the stream is cooled to a temperature between -20 and 100 ° C.
- the pressure of the gas stream is preferably between 5 and 20 bar absolute.
- the presence of hydrofluoric acid in a gas stream limits the temperature rise thereof due to compression. This limitation has the advantage of reducing the number of intermediate cooling steps in the compression steps. After the compression step (s), the stream is subjected to at least one separation step to recover hydrofluoric acid.
- the separation step generally consists of one or more distillation (s) at a pressure preferably between 5 and 20 bar absolute and at a temperature at the bottom of the distillation column, preferably between 50 and 150 ° C.
- the gas stream from a fluorination reactor and comprising hydrofluoric acid is cooled to give a liquid phase and a gas phase.
- the gaseous phase is subjected to a compression step, without intermediate cooling and the temperature of the gaseous phase at the end of the compression is between 50 and 150 ° C and then sent to a separation step to recover the hydrofluoric acid.
- the liquid phase is pumped to the desired pressure and also subjected, with the compressed gaseous phase, to the separation step.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
La présente invention concerne un procédé de traitement d'un flux comprenant de l'acide fluorhydrique. Plus particulièrement, elle a pour objet un procédé de récupération de l'acide fluorhydrique. Le procédé selon la présente invention est caractérisé en ce qu'il comprend au moins une étape de compression d'un flux gazeux comprenant de l'acide fluorhydrique, la température dudit flux avant l'étape de compression est comprise entre -20 et 100°C.
Description
PROCEDE DE RECUPERATION DE L'ACIDE FLUORHYDRIQUE
La présente invention concerne un procédé de traitement d'un flux comprenant de l'acide fluorhydrique. Plus particulièrement, elle a pour objet un procédé de récupération de l'acide fluorhydrique.
Du fait de sa capacité à dissoudre les oxydes, l'acide fluorhydrique est un réactif important dans les procédés de purification de l'aluminium et de l'uranium. Il est également utilisé pour attaquer le verre, et comme catalyseur des réactions d'alkylation de l'isobutane et du butène dans le raffinage du pétrole.
Dans les usines d'électrodéposition, il est utilisé dans certains procédés de surface, de décapage d'oxyde de métaux, de polissage électrochimique et dans différents types d'électrodéposition.
L'acide fluorhydrique est également utilisé lors de la synthèse de nombreux composés organiques contenant du fluor, parmi lesquels le tetrafluoroéthylène et les gaz utilisés en réfrigération comme les hydrofluorocarbures.
La présente invention fournit un procédé de récupération de l'acide fluorhydrique comprenant au moins une étape de compression. Le procédé selon la présente invention est caractérisé en ce qu'il comprend au moins une étape de compression d'un flux gazeux comprenant de l'acide fluorhydrique, la température dudit flux avant l'étape de compression est comprise entre -20 et 100 °C.
La teneur d'acide fluorhydrique présente dans le flux soumis à l'étape de compression est de préférence comprise entre 10 et 90 % en poids.
Outre l'acide fluorhydrique, le flux peut comprendre de l'acide chlorhydrique et/ou des composés organiques comme par exemple le pentafluoroéthane, le tetrafluoroéthane, le dichlorotrifluoroéthane, le chlorotetrafluoroéthane, le difluorométhane, le perchloroéthylène, le dichlorométhane, le chlorofluorométhane et le chlorotrifluoroéthane.
Le flux gazeux comprenant de l'acide fluorhydrique peut provenir d'un réacteur de fluoration en phase liquide ou en phase gaz.
Lorsque le flux à traiter provient d'un réacteur de fluoration en phase gaz à haute température, préalablement à l'étape de compression le flux est refroidi à une température comprise entre -20 et 100°C .
A l'issue de l'étape ou des étapes de compression, la pression du flux gazeux est de préférence comprise entre 5 et 20 bar absolu.
De façon surprenante, la présence d'acide fluorhydrique dans un flux gazeux limite l'élévation de la température de celui-ci liée à la compression. Cette limitation présente l'avantage de réduire le nombre d'étapes de refroidissement intermédiaire aux étapes de compression. Après les ou l'étape(s) de compression, le flux est soumis à au moins une étape de séparation pour récupérer l'acide fluorhydrique.
L'étape de séparation consiste en général en une ou plusieurs distillation(s) à une pression de préférence comprise entre 5 et 20 bar absolu et à une température en pied de la colonne de distillation, de préférence comprise entre 50 et 150 °C.
Selon un mode de réalisation de l'invention, le flux gazeux issu d'un réacteur de fluoration et comprenant de l'acide fluorhydrique est refroidi pour donner une phase liquide et une phase gazeuse. La phase gazeuse est soumise à une étape de compression, sans refroidissement intermédiaire et la température de la phase gazeuse à l'issue de la compression est comprise entre 50 et 150°C puis envoyée à une étape de séparation pour récupérer l'acide fluorhydrique. La phase liquide est pompée à la pression désirée et également soumise, avec la phase gazeuse comprimée, à l'étape de séparation.
Claims
REVENDICATIONS
1 ) Procédé de récupération d'acide fluorhydrique caractérisé en ce qu'il comprend au moins une étape de compression d'un flux gazeux comprenant de l'acide fluorhydrique, la température dudit flux avant l'étape de compression est comprise entre -20 et 100 °C.
2) Procédé selon la revendication 1 caractérisé en ce que le flux gazeux comprend en outre de l'acide chlorhydrique et/ou des composés organiques.
3) Procédé selon la revendication 1 ou 2 caractérisé en ce que la teneur de l'acide fluorhydrique présent dans le flux est comprise entre 10 et 90% en poids.
4) Procédé selon l'une quelconque des revendications précédentes caractérisé en ce qu'à l'issue de la compression, le flux est soumis à une étape de séparation.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0605524A FR2902780B1 (fr) | 2006-06-21 | 2006-06-21 | Procede de recuperation de l'acide fluorhydrique |
| PCT/FR2007/051303 WO2007147987A1 (fr) | 2006-06-21 | 2007-05-21 | Procede de recuperation de l'acide fluorhydrique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2029478A1 true EP2029478A1 (fr) | 2009-03-04 |
Family
ID=37596209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP07766077A Withdrawn EP2029478A1 (fr) | 2006-06-21 | 2007-05-21 | Procede de recuperation de l'acide fluorhydrique |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20100280292A1 (fr) |
| EP (1) | EP2029478A1 (fr) |
| JP (1) | JP2009541190A (fr) |
| KR (1) | KR20090020623A (fr) |
| CN (1) | CN101460396A (fr) |
| FR (1) | FR2902780B1 (fr) |
| WO (1) | WO2007147987A1 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107934915B (zh) * | 2017-12-29 | 2020-12-29 | 云南瓮福云天化氟化工科技有限公司 | —种无水氟化氢生产过程中杂质的净化方法 |
| CN115120998B (zh) * | 2022-07-11 | 2024-02-02 | 多氟多新材料股份有限公司 | 提高氟化氢产率的方法、氟化氢尾气的处理方法及处理装置 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1325924A (fr) * | 1961-05-02 | 1963-05-03 | Buss Ag | Procédé d'épuration des vapeurs d'acide fluorhydrique |
| DE2651630A1 (de) * | 1976-11-12 | 1978-05-24 | Riedel De Haen Ag | Verfahren zur abtrennung von fluorwasserstoff aus gemischen mit sauren gasen |
| US4299606A (en) * | 1976-12-30 | 1981-11-10 | Hooker Chemicals & Plastics Corp. | Recovery of HF and HCl from gaseous mixtures thereof |
| FR2700766B1 (fr) * | 1993-01-27 | 1995-03-24 | Atochem Elf Sa | Procédé de fluoration de perchloréthylène ou du pentachloréthane. |
| GB9406813D0 (en) * | 1994-04-06 | 1994-05-25 | Ici Plc | Production of pentafluoroethane |
| US5545778A (en) * | 1994-05-25 | 1996-08-13 | Alliedsignal Inc. | Single stage process for producing hydrofluorocarbons from perchloroethylene |
-
2006
- 2006-06-21 FR FR0605524A patent/FR2902780B1/fr not_active Expired - Fee Related
-
2007
- 2007-05-21 US US12/305,875 patent/US20100280292A1/en not_active Abandoned
- 2007-05-21 JP JP2009515921A patent/JP2009541190A/ja active Pending
- 2007-05-21 WO PCT/FR2007/051303 patent/WO2007147987A1/fr not_active Ceased
- 2007-05-21 EP EP07766077A patent/EP2029478A1/fr not_active Withdrawn
- 2007-05-21 CN CNA2007800210474A patent/CN101460396A/zh active Pending
- 2007-05-21 KR KR1020087030733A patent/KR20090020623A/ko not_active Withdrawn
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2007147987A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US20100280292A1 (en) | 2010-11-04 |
| KR20090020623A (ko) | 2009-02-26 |
| WO2007147987A1 (fr) | 2007-12-27 |
| CN101460396A (zh) | 2009-06-17 |
| FR2902780A1 (fr) | 2007-12-28 |
| FR2902780B1 (fr) | 2008-09-05 |
| JP2009541190A (ja) | 2009-11-26 |
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| AX | Request for extension of the european patent |
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| 17Q | First examination report despatched |
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| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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| 18D | Application deemed to be withdrawn |
Effective date: 20110318 |