US4088734A
Expired / Lapsed
US
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Removal of hydrogen arsenide
Assignee: IFP Energies nouvelles
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Filing: 1976-12-08
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Granted: 1978-05-09
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Expires: 1996-12-08
Abstract
Abstract Process for removing arsenic compounds and particularly arsine from gases containing the same, by treating said gases with a washing solution consisting either of an alkaline aqueous solution, containing a zinc or lead, salt or oxide and/or one or more salts of anthraquinone sulfonic or disulfonic acids, or of a solution in an organic solvent of at least one quinone compound in the presence of an amine or an ethanolamine.
Inventors
- 👤 Claude Gadelle
- 👤 Jean-Pierre Laloz
- 👤 Irenee Seree De Roch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:28
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/14; B01D53/1493; C; C07; C07C; C07C7/00; C07C7/11
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
91 words
A process for removing hydrogen arsenide H 3 As from a gaseous effluent containing hydrogen arsenide as an impurity, wherein the gaseous effluent is washed at a temperature between 0° and 100° C, with an aqueous washing solution containing sodium hydroxide or potassium hydroxide, at least one salt or oxide of zinc or lead, the concentration of sodium hydroxide or potassium hydroxide being from 1 to 20% by weight of the said washing solution, and the zinc or lead content being from 0.01 to 10% by weight of the said solution.
Claim 2
Dependent Claim
91 words
A process for removing hydrogen arsenide H 3 As from a gaseous effluent containing hydrogen arsenide as an impurity, wherein the gaseous effluent is washed at a temperature between 0° and 100° C, with an aqueous washing solution containing sodium hydroxide or potassium hydroxide, at least one salt or oxide of zinc or lead, the concentration of sodium hydroxide or potassium hydroxide being from 1 to 20% by weight of the said washing solution, and the zinc or lead content being from 0.01 to 10% by weight of the said solution.
Claim 3
Dependent Claim
22 words
A process according to claim 1, wherein the zinc or lead content is from 0.5 to 4% by weight of the solution.
Claim 4
Dependent Claim
10 words
A process according to claim 1, wherein zinc is used.
Claim 5
Dependent Claim
13 words
A process according to claim 1, wherein the gaseous effluent is predominantly hydrocarbon.
Claim 6
Dependent Claim
10 words
A process according to claim 1, wherein lead is used.
Claim 7
Dependent Claim
51 words
A process for removing hydrogen arsenide H 3 As from a gaseous effluent containing hydrogen arsenide as an impurity, wherein the gaseous effluent is washed, at a temperature between 0° and 100° C, with an aqueous alkaline washing solution of at least one salt of a sulfonic or disulfonic anthraquinone acid.
Claim 8
Dependent Claim
51 words
A process for removing hydrogen arsenide H 3 As from a gaseous effluent containing hydrogen arsenide as an impurity, wherein the gaseous effluent is washed, at a temperature between 0° and 100° C, with an aqueous alkaline washing solution of at least one salt of a sulfonic or disulfonic anthraquinone acid.
Claim 9
Dependent Claim
32 words
A process according to claim 6, wherein the pH of said alkaline aqueous solution of at least one salt of a sulfonic or disulfonic anthraquinone acid is from about 7.0 to 11.
Claim 10
Dependent Claim
28 words
A process according to claim 7, performed in the presence of sodium bicarbonate or tetraborate and a sodium salt of anthraquinone sulfonic acids, either pure or as mixtures.
Claim 11
Dependent Claim
28 words
A process according to claim 6, wherein the salt of a sulfonic or disulfonic anthraquinone acid is selected from the hydrosoluble salts of 9,10-anthraquinone-2,7-disulfonic, 9,10-anthraquinone-1,5-disulfonic and 9,10-anthraquinone-2,6-disulfonic acids.
Claim 12
Dependent Claim
13 words
A process according to claim 6, wherein the gaseous effluent is predominantly hydrocarbon.
Claim 13
Dependent Claim
56 words
A process for removing hydrogen arsenide H 3 As from a gaseous effluent containing hydrogen arsenide as an impurity, wherein the gaseous effluent is washed, at a temperature between 0° and 100° C, with a washing solution consisting essentially of an organic solvent containing at least one quinone compound and a hydrocarbon amine or an ethanolamine.
Claim 14
Dependent Claim
56 words
A process for removing hydrogen arsenide H 3 As from a gaseous effluent containing hydrogen arsenide as an impurity, wherein the gaseous effluent is washed, at a temperature between 0° and 100° C, with a washing solution consisting essentially of an organic solvent containing at least one quinone compound and a hydrocarbon amine or an ethanolamine.
Claim 15
Dependent Claim
27 words
A process according to claim 11, wherein the organic solvent containing at least one quinone compound is selected from the alcohols, ketones, ethers, glycols, ethers and polyethers.
Claim 16
Dependent Claim
33 words
A process according to claim 11, containing said hydrocarbon amine which is a primary, secondary or tertiary amine, the amine content being from about 0.1 to 10% by weight of the organic solvent.
Claim 17
Dependent Claim
25 words
A process according to claim 11, wherein said ethanolamine is used at a concentration from about 0.1 to 10% by weight of the organic solvent.
Claim 18
Dependent Claim
12 words
A process according to claim 12, wherein the polyether is polyethyleneglycol 400.
Claim 19
Dependent Claim
13 words
A process according to claim 11, wherein the gaseous effluent is predominantly hydrocarbon.
References Cited (Backward Citations)
US1519470A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-08 | 1981-11-07 | 1982-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-08 | 1985-11-07 | 1986-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-08 | 1989-11-07 | 1990-05-09 | $7700.00 | Window Closed / Lapsed |