GB1431685A - Removing sulphur dioxide from gases containing the same - Google Patents
Removing sulphur dioxide from gases containing the sameInfo
- Publication number
- GB1431685A GB1431685A GB4239973A GB4239973A GB1431685A GB 1431685 A GB1431685 A GB 1431685A GB 4239973 A GB4239973 A GB 4239973A GB 4239973 A GB4239973 A GB 4239973A GB 1431685 A GB1431685 A GB 1431685A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gas
- sulphur
- sulphur dioxide
- ammonia
- residual
- 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.)
- Expired
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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
-
- 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
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
- Catalysts (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
1431685 Sulphur dioxide removal INSTITUT FRANCAIS DU PETROLE 10 Sept 1973 [15 Sept 1972] 42399/73 Heading C1A Sulphur dioxide is removed from a gas containing it by contacting the gas, (a), with an aqueous ammonia and/or ammonium sulphite solution, so as to absorb sulphur dioxide in the form of ammonium sulphite and/or bisulphite, then (b), heating at least a portion of the solution obtained in (a) so as to decompose the sulphite and/or bisulphite to a gas containing sulphur dioxide and ammonia, then, (c), heating the gas from step (b) with a gas capable of reducing sulphur dioxide to hydrogen sulphide, preferably at a temperature of 150-600‹ C., in the presence of a catalyst capable of catalysing the reaction between the reducing agent and sulphur dioxide, so as to produce a gas containing hydrogen sulphide, sulphur dioxide and ammonia, with a molar ratio of H 2 S/SO 2 of from 1À7 to 2À3, then contacting this gas, (d), with a second catalyst capable of catalysing the reaction between H 2 S and SO 2 , to form sulphur and a residual ammonia containing gas, (e) separating the sulphur and the residual gas, suitably (f) by contacting with an organic solvent to remove residual sulphur and sulphur compounds, and (g) using the residual gas, which contains ammonia, to constitute an aqueous ammonia and/or ammonium sulphite solution to be used in step (a). Where the treated gas contains also sulphur trioxide, after decomposition of the sulphites the ammonium sulphates are treated with a reducing agent, suitably in a bath of molten sodium sulphate, so as to convert them to SO 2 and NH 3 which are subsequently subjected to step (c) of the process. The first catalyst may be at least one metal (or oxide or sulphide thereof) selected from Groups VIa and VIII of the Periodic Table; a mixture of cobalt and molybdenum oxides on alumina is preferred. Alternatively, copper, silver, vanadium, manganese, rhenium or zinc (or their oxides or sulphides) may be used. The second catalyst may be alumina or bauxite, and the organic solvent may be polyethylene glycol. As reducing gas, a mixture of carbon monoxide and hydrogen is preferred.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7232926A FR2199475B1 (en) | 1972-09-15 | 1972-09-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1431685A true GB1431685A (en) | 1976-04-14 |
Family
ID=9104377
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4239973A Expired GB1431685A (en) | 1972-09-15 | 1973-09-10 | Removing sulphur dioxide from gases containing the same |
Country Status (6)
Country | Link |
---|---|
JP (1) | JPS4967870A (en) |
BE (1) | BE804509A (en) |
DE (1) | DE2344924A1 (en) |
FR (1) | FR2199475B1 (en) |
GB (1) | GB1431685A (en) |
NL (1) | NL7312796A (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4036943A (en) * | 1972-09-15 | 1977-07-19 | Institut Francais Du Petrole | Process for removing sulfur dioxide from a gas and producing sulfur therefrom |
FR2521868A1 (en) * | 1982-02-24 | 1983-08-26 | G Pi | Sulphur di:oxide is washed from furnace exhaust gas - and sepd. from reaction liq. in combined plant |
US7585404B2 (en) * | 2006-12-06 | 2009-09-08 | Chevron U.S.A. Inc. | Decomposition of waste products formed in slurry catalyst synthesis |
-
1972
- 1972-09-15 FR FR7232926A patent/FR2199475B1/fr not_active Expired
-
1973
- 1973-09-05 BE BE1005341A patent/BE804509A/en unknown
- 1973-09-06 DE DE19732344924 patent/DE2344924A1/en active Pending
- 1973-09-10 GB GB4239973A patent/GB1431685A/en not_active Expired
- 1973-09-11 JP JP48102545A patent/JPS4967870A/ja active Pending
- 1973-09-17 NL NL7312796A patent/NL7312796A/xx not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
FR2199475B1 (en) | 1975-03-14 |
NL7312796A (en) | 1974-03-19 |
JPS4967870A (en) | 1974-07-01 |
BE804509A (en) | 1974-03-05 |
DE2344924A1 (en) | 1974-03-21 |
FR2199475A1 (en) | 1974-04-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |