EP0885052A1 - Method for removing sulfur-containing contaminants, aromatics and hydrocarbons from gas - Google Patents

Method for removing sulfur-containing contaminants, aromatics and hydrocarbons from gas

Info

Publication number
EP0885052A1
EP0885052A1 EP97900808A EP97900808A EP0885052A1 EP 0885052 A1 EP0885052 A1 EP 0885052A1 EP 97900808 A EP97900808 A EP 97900808A EP 97900808 A EP97900808 A EP 97900808A EP 0885052 A1 EP0885052 A1 EP 0885052A1
Authority
EP
European Patent Office
Prior art keywords
gas
gas stream
sulfur
selective oxidation
absorption step
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.)
Ceased
Application number
EP97900808A
Other languages
German (de)
French (fr)
Inventor
Jan Adolf Lagas
Theodorus Joseph Petrus Van Pol
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.)
Stork Engineers and Contractors BV
Original Assignee
Stork Engineers and Contractors BV
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 Stork Engineers and Contractors BV filed Critical Stork Engineers and Contractors BV
Publication of EP0885052A1 publication Critical patent/EP0885052A1/en
Ceased 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
    • B01D53/1406—Multiple stage absorption
    • 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
    • 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
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/75—Multi-step processes
    • 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
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • 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
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8603—Removing sulfur compounds
    • B01D53/8612—Hydrogen sulfide
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B17/00—Sulfur; Compounds thereof
    • C01B17/02—Preparation of sulfur; Purification
    • C01B17/04—Preparation of sulfur; Purification from gaseous sulfur compounds including gaseous sulfides
    • C01B17/0404—Preparation of sulfur; Purification from gaseous sulfur compounds including gaseous sulfides by processes comprising a dry catalytic conversion of hydrogen sulfide-containing gases, e.g. the Claus process
    • C01B17/0408—Pretreatment of the hydrogen sulfide containing gases

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Analytical Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Treating Waste Gases (AREA)
  • Industrial Gases (AREA)
  • Gas Separation By Absorption (AREA)

Abstract

This invention relates to a method for removing sulfur-containing contaminants in the form of mercaptans and H2S from natural gas, which may also contain CO2 and higher aliphatic and aromatic hydrocarbons, and recovering elemental sulfur, wherein in a first absorption step the sulfur-containing contaminants are removed from the gas, to form on the one hand a purified gas stream and on the other hand a sour gas, which sour gas is fed to a second absorption step in which the sour gas is separated into an H2S-enriched and mercaptan-reduced first gas stream, which is fed to a Claus plant, followed by a selective oxidation step of H2S to elemental sulfur in the tail gas, and an H2S-reduced and mercaptan-enriched second gas stream, which second gas stream, if desired after further treatment, is subjected to a selective oxidation of sulfur compounds to elemental sulfur.

Claims

C ΔIUS
1. A method for removing sulfur-containing contaminants in the form of mercaptans and H S from hydrocarbon gas, which may also contain CO2 and higher aliphatic and aromatic hydrocarbons, and recovering elemental sulfur, wherein in a first absorption step the sulfur-containing contaminants are removed from the gas, to form on the one hand a purified gas stream and on the other hand a sour gas, which sour gas is fed to a second absorption step in which the sour gas is separated into an H2S-enriched and mercaptan-reduced first gas stream, which is fed to a Claus plant, followed by a selective oxidation step of H2S to elemental sulfur in the tail gas, and an H2S-reduced and mercaptan-enriched second gas stream, which second gas stream, if desired after further treatment, is subjected to a selective oxidation of sulfur compounds to elemental sulfur.
2. A method according to claim 1, wherein said second gas stream is hydrogenated prior to the selective oxidation.
3. A method according to claim 1 or 2, wherein said selective oxidation of the tail gas of the first gas stream and of the second gas stream occurs in the same reactor.
4. A method according to claim 1 or 2, wherein said selective oxidation of the tail gas of the first gas stream and of the second gas stream occurs in two separate reactors.
5. A method according to claims 1-4, wherein the first absorption step is carried out utilizing a chemical, physical, or chemical/physical absorption agent which removes substantially all sulfur compounds and CO2 from the gas .
6. A method according to claim 5, wherein as absorption agent sulfolane, in combination with a secondary or tertiary amine, is used.
7. A method according to claims 1-6, wherein the second absorption step is carried out utilizing an absorption agent based on a secondary and/or tertiary amine.
8. A method according to claims 1-7, wherein the first absorption step is carried out in such a manner that the purified gas contains not more than 10, more particularly not more than 5 ppm of sulfur-containing contaminants.
9. A method according to claims 1-8, wherein natural gas is used as the gas to be purified, which is optionally liquefied after the purification.
10. A method according to claims 1-9, wherein the second absorption step is carried out in such a manner that the content of H2S in the first gas stream is at least 2.5 times, more particularly at least 4 times higher than the content of H2S in the sour gas.
11. A method according to claims 1-10, wherein the content of mercaptans in the first gas stream is less than 1 ppm.
12. A method according to claims 2-11, wherein the hydrogenation occurs in the presence of a catalyst on support, with a catalytically active component based on at least one metal from Group VIB and at least one metal from Group VIII of the Periodic System of the Elements, more particularly on a combination of cobalt and molybdenum.
13. A method according to claims 2-12, wherein the hydrogenation occurs in the presence of an amount of water.
14. A method according to claims 2-13, wherein the second gas stream is heated indirectly prior to the hydrogenation.
EP97900808A 1996-01-19 1997-01-20 Method for removing sulfur-containing contaminants, aromatics and hydrocarbons from gas Ceased EP0885052A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NL1002135 1996-01-19
NL1002135A NL1002135C2 (en) 1996-01-19 1996-01-19 Method for removing sulfur-containing impurities, aromatics and hydrocarbons from gas.
PCT/NL1997/000019 WO1997026070A1 (en) 1996-01-19 1997-01-20 Method for removing sulfur-containing contaminants, aromatics and hydrocarbons from gas

Publications (1)

Publication Number Publication Date
EP0885052A1 true EP0885052A1 (en) 1998-12-23

Family

ID=19762184

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97900808A Ceased EP0885052A1 (en) 1996-01-19 1997-01-20 Method for removing sulfur-containing contaminants, aromatics and hydrocarbons from gas

Country Status (11)

Country Link
EP (1) EP0885052A1 (en)
JP (1) JP2000507151A (en)
KR (1) KR19990077362A (en)
CN (1) CN1209756A (en)
AU (1) AU1321497A (en)
CA (1) CA2243482A1 (en)
ID (1) ID15833A (en)
NL (1) NL1002135C2 (en)
TW (1) TW372883B (en)
WO (1) WO1997026070A1 (en)
ZA (1) ZA97326B (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0021409D0 (en) 2000-08-31 2000-10-18 Boc Group Plc Treatment of a gas stream containing hydrogen sulphide
JP4837176B2 (en) * 2001-03-07 2011-12-14 千代田化工建設株式会社 Method for removing sulfur compounds from natural gas
DE10208253A1 (en) 2002-02-26 2003-09-04 Lurgi Ag Process for the removal of mercaptan from raw gas
DE10219900B4 (en) * 2002-05-03 2004-08-26 Lurgi Ag Process for the purification of hydrocarbon gas
FR2875236B1 (en) * 2004-09-10 2006-11-10 Total Sa METHOD AND INSTALLATION FOR TREATING DSO
FR2916652B1 (en) * 2007-05-30 2009-07-24 Inst Francais Du Petrole PROCESS FOR INTEGRATED TREATMENT OF A NATURAL GAS FOR COMPLETE DEACIDIFICATION
CN101480560B (en) * 2008-01-09 2011-11-30 中国石油化工股份有限公司 Method for processing Claus tail gases by membrane separation
CN102227251B (en) * 2008-11-28 2014-08-27 国际壳牌研究有限公司 Process for producing purified natural gas
SG10201705644UA (en) * 2014-04-16 2017-08-30 Saudi Arabian Oil Co Improved sulfur recovery process for treating low to medium mole percent hydrogen sulfide gas feeds with btex in a claus unit
RU2649442C2 (en) * 2016-04-25 2018-04-03 Общество с ограниченной ответственностью "Старт-Катализатор" Apparatus, method and catalyst for the purification of a gaseous raw hydrocarbon from hydrogen sulfide and mercaptans
WO2018115919A1 (en) * 2016-12-23 2018-06-28 Total Sa Integrated process for elemental sulphur treatment
CN108452652B (en) * 2017-12-04 2021-06-08 盐城市兰丰环境工程科技有限公司 Industrial gas desulfurization system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4088735A (en) * 1974-07-10 1978-05-09 Metallgesellschaft Aktiengesellschaft Process for purifying gases from the gasification of fossil fuels
US3989811A (en) * 1975-01-30 1976-11-02 Shell Oil Company Process for recovering sulfur from fuel gases containing hydrogen sulfide, carbon dioxide, and carbonyl sulfide
FR2501663A1 (en) * 1981-03-13 1982-09-17 Technip Cie Simultaneous removal of carbon di:oxide and hydrogen sulphide - from natural gas etc., and recovery as conc. carbon di:oxide and sulphur
US4356161A (en) * 1981-08-24 1982-10-26 Shell Oil Company Process for reducing the total sulfur content of a high CO2 -content feed gas
DE4206943A1 (en) * 1992-03-05 1993-09-09 Krupp Koppers Gmbh METHOD FOR PURIFYING A GAS GIVEN BY CARBURATING CARBONATED MATERIAL

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9726070A1 *

Also Published As

Publication number Publication date
NL1002135C2 (en) 1997-07-22
KR19990077362A (en) 1999-10-25
ZA97326B (en) 1997-07-22
ID15833A (en) 1997-08-14
CA2243482A1 (en) 1997-07-24
AU1321497A (en) 1997-08-11
JP2000507151A (en) 2000-06-13
TW372883B (en) 1999-11-01
WO1997026070A1 (en) 1997-07-24
CN1209756A (en) 1999-03-03

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