Search International and National Patent Collections
Some content of this application is unavailable at the moment.
If this situation persists, please contact us atFeedback&Contact
1. (EP0801633) METHOD FOR OXIDISING H 2?S TO SULPHUR

Office : European Patent Office
Application Number: 96937360 Application Date: 30.10.1996
Publication Number: 0801633 Publication Date: 22.10.1997
Publication Kind : B1
Prior PCT appl.: Application Number:FR1996001699 ; Publication Number: Click to see the data
IPC:
C 01B
B01D 53/86
C01B 17/04
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
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
86
Catalytic 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
CPC:
B01D 53/8612
C01B 17/0456
C01B 17/0469
Y10S 423/06
Applicants: ELF AQUITAINE
Inventors: NOUGAYREDE JEAN
PHILIPPE ANDRE
SAVIN-PONCET SABINE
Priority Data: 9512989 03.11.1995 FR
9601699 30.10.1996 FR
Title: (DE) VERFAHREN ZUR OXIDATION VON H2S IN SCHWEFEL
(EN) METHOD FOR OXIDISING H 2?S TO SULPHUR
(FR) PROCEDE D'OXYDATION DE H 2?S EN SOUFRE
Abstract: front page image
(EN) An oxidation unit (2a) is used which comprises, in series, three catalytic stages (3a, 4a, 5a) each containing a catalyst for promoting the selective oxidation of H2S to sulphur up to a temperature $g(u)s $m(F) 150 °C. The gas to be processed (16) is fed through each of said stages and air (50, 53a, 55a) is injected into each stage. An H2S fraction of said gas is adiabatically oxidised to sulphur in each of the first two stages (3a, 4a) with an amount of air such that a temperature no higher than $g(u)s is achieved at the outlet of said stages. All the H2S in the gas fed into the final stage (5a) is oxidised in a controlled excess of air at temperatures no higher than $g(u)s. The method is useful for processing H2S-containing gases produced by the hydrogenation/hydrolysis of sulphur plant waste gases.
(FR) On opère dans une unité d'oxydation (2a) comportant, en série, trois étages catalytiques (3a, 4a, 5a), renfermant chacun un catalyseur promoteur de l'oxydation sélective de 1'H2S en soufre jusq'à une température $g(u)s $m(F) 150 °C. On fait passer le gaz à traiter (16) successivement dans chacun desdits étages et injecte de l'air (50, 53a, 55a) dans chaque étage. On oxyde en soufre, de manière adiabatique, une fraction de l'H2S dudit gaz dans chacun des deux premiers étages (3a, 4a) avec une quantité d'air assurant en sortie de ces étages une température d'au plus $g(u)s. On oxyde la totalité de l'H2S du gaz passant dans l'étage final (5a) en excès contrôlé d'air et à des températures d'au plus $g(u)s. Application au traitement de gaz renfermant H2S obtenus par hydrogénation/hydrolyse de gaz résiduaires d'usines à soufre.
Also published as:
NO19973030ES2170283RU02142403US6017507JP3869856 JPH10512540
CA2209331DE000069618761PT801633FR2740767WO/1997/017284