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1. (WO1992010270) PROCESS FOR THE REMOVAL OF SULPHUR COMPOUNDS FROM GASES
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1992/010270 International Application No.: PCT/NL1991/000250
Publication Date: 25.06.1992 International Filing Date: 04.12.1991
Chapter 2 Demand Filed: 18.06.1992
IPC:
B01D 53/48 (2006.01) ,B01D 53/50 (2006.01) ,B01D 53/52 (2006.01) ,B01D 53/84 (2006.01) ,C01B 17/05 (2006.01) ,C02F 3/34 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
D
SEPARATION
53
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 or aerosols
34
Chemical or biological purification of waste gases
46
Removing components of defined structure
48
Sulfur compounds
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
D
SEPARATION
53
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 or aerosols
34
Chemical or biological purification of waste gases
46
Removing components of defined structure
48
Sulfur compounds
50
Sulfur oxides
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
D
SEPARATION
53
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 or aerosols
34
Chemical or biological purification of waste gases
46
Removing components of defined structure
48
Sulfur compounds
52
Hydrogen sulfide
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
D
SEPARATION
53
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 or aerosols
34
Chemical or biological purification of waste gases
74
General processes for purification of waste gases; Apparatus or devices specially adapted therefor
84
Biological processes
C CHEMISTRY; METALLURGY
01
INORGANIC CHEMISTRY
B
NON-METALLIC ELEMENTS; COMPOUNDS THEREOF
17
Sulfur; Compounds thereof
02
Preparation of sulfur; Purification
04
from gaseous sulfur compounds including gaseous sulfides
05
by wet processes
C CHEMISTRY; METALLURGY
02
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
F
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
3
Biological treatment of water, waste water, or sewage
34
characterised by the micro-organisms used
Applicants:
PAQUES B.V. [NL/NL]; T. de Boerstraat 11 P.O. Box 52 NL-8560 AB Balk, NL (AllExceptUS)
BUISMAN, Cees, Jan, Nico [NL/NL]; NL (UsOnly)
Inventors:
BUISMAN, Cees, Jan, Nico; NL
Agent:
DE BRUIJN, Leendert, C. ; Nederlandsch Octrooibureau Scheveningseweg 82 P.O. Box 29720 NL-2502 LS The Hague, NL
Priority Data:
900266104.12.1990NL
Title (EN) PROCESS FOR THE REMOVAL OF SULPHUR COMPOUNDS FROM GASES
(FR) PROCEDE D'ELIMINATION DES COMPOSES DE SOUFRE DES GAZ
Abstract:
(EN) A process for the removal of sulphur compounds from a gaseous effluent, comprising the steps of: a) contacting the gaseous effluent with an aqueous solution wherein sulphur compounds are dissolved: b) adjusting the concentration of buffering compounds such as carbonate and/or bicarbonate and/or phosphate in the aqueous solution to a value between 20 and 2000 meq/l; c) subjecting the aqueous solution containing sulphide to sulphide-oxidising bacteria in the presence of oxygen in a reactor wherein sulphide is oxidised to elemental sulphur; d) separating elemental sulphur from the aqueous solution; and e) recycling the aqueous solution to step a). This process is suitable for removing H2S from biogas, ventilation air etc. It can be used for removing SO2 from combustion gases by introducing the additional step, after step a) and before step c), of subjecting the aqueous solution containing the sulphur compounds to a reduction of the sulphur compounds to sulphide. H2S and SO2 removal is further enhanced by a residual sulphur content in the washing liquid of 1-50 g/l.
(FR) Procédé d'élimination des composés de soufre des effluents gazeux, lequel procédé consiste: a) à mettre l'effluent gazeux en contact avec une solution aqueuse dans laquelle les composés de soufre se dissolvent; b) à porter à une valeur comprise entre 20 et 2000 meq/l la concentration dans la solution aqueuse de composés tampons tels que le carbonate et/ou le bicarbonate et/ou le phosphate; c) à soumettre la solution aqueuse contenant du sulfure à des bactéries oxydant le sulfure en présence d'oxygène dans un réacteur dans lequel le sulfure s'oxyde et laisse du soufre élémentaires; d) à séparer le soufre élémentaire de la solution aqueuse; et e) à renvoyer la solution aqueuse à l'étape a). Ce procédé peut servir à enlever le H2S des biogaz, de l'air de ventilation, ou analogue, ainsi qu'à enlever le SO2 des gaz de combustion à l'aide d'une étape supplémentaire effectuée après l'étape a) et avant l'étape c) et consistant à soumettre la solution aqueuse contenant les composés de soufre à une réduction des composés de soufre de manière à obtenir du sulfure. On peut améliorer davantage l'élimination du H2S et du SO2 en assurant une teneur résiduaire de soufre de 1 à 50 g/l dans le liquide de lavage.
Designated States: AT, AU, BB, BG, BR, CA, CH, CS, DE, DK, ES, FI, GB, HU, JP, KP, KR, LK, LU, MG, MN, MW, NL, NO, PL, RO, SD, SE, SU, US
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LU, MC, NL, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, ML, MR, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
CZPV1993-1058FI932534NO19931943ES2062883EP0561889RU02089267
US5354545EE02976JPH05507235CA2096660DE000069104997KR10199600103783
AU1991090672DK0561889BG61069