Patent US4478800A successfully refreshed from Google Patents.
US4478800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for removal of sulfur compounds from gases
Assignee: Kiwa Gastec Holding NV
•
Filing: 1982-08-04
•
Granted: 1984-10-23
•
Expires: 2002-08-04
Abstract
Abstract Process for removal of sulfur compounds from gases by passing the gases over an absorption mass which, on an inert support having a specific surface area of more than 10 m 2 per g, contains metal oxides which react with hydrogen sulfide to give metal-sulfur compounds and at least 20% by weight of which metal oxides are present in finely divided form with a particle size of less than 40 nm. The gases are passed at a temperature of 5° to 800° C. over the support loaded with metal oxide, and the resultant support loaded with metal-sulfur compounds is regenerated by passing gases containing oxidizing agents over it.
Inventors
- 👤 Willem J. J. van der Wal
- 👤 John W. Geus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:37
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/04; C; C01; C01B; C01B17/00; C01B17/02; C01B17/04; C01B3/00; C01B3/50; C01B3/56; C10; C10K; C10K1/00; C10K1/20; B01D2253/00; B01D2253/10; B01D2253/112; B01D2253/30; B01D2253/302; B01D2253/304; B01D2253/306; B01D2253/308; B01D2257/00; B01D2257/30; B01D2257/304; B01D2257/308; C01B2203/00; C01B2203/04; C01B2203/042; C01B2203/0465; C01B2203/0485
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
159 words
A process for removal of hydrogen sulfide, carbonyl sulfide and/or carbon disulfide from gases, comprising: (a) passing the gas containing hydrogen sulfide, carbonyl sulfide or carbon disulfide, at a temperature of from 5° to 800° C. over an absorption mass including metal oxides which react with the sulfur compound to give metal-sulfur compounds and which metal oxides are present on an inert, refractory support having a specific surface area of more than 10 m 2 per g, (b) said support being loaded with the metal oxide in an amount of at least 5% by weight, calculated as metal of the active component and relative to the weight of the support, (c) at least 20% by weight of the metal oxides on the support being in finely divided form with a particle size of less than 40 nanometers, and (d) regenerating the support loaded with metal-sulfur compounds by oxidizing said metal-sulfur compounds by passing over of gases including oxidizing agents.
Claim 2
Dependent Claim
159 words
A process for removal of hydrogen sulfide, carbonyl sulfide and/or carbon disulfide from gases, comprising: (a) passing the gas containing hydrogen sulfide, carbonyl sulfide or carbon disulfide, at a temperature of from 5° to 800° C. over an absorption mass including metal oxides which react with the sulfur compound to give metal-sulfur compounds and which metal oxides are present on an inert, refractory support having a specific surface area of more than 10 m 2 per g, (b) said support being loaded with the metal oxide in an amount of at least 5% by weight, calculated as metal of the active component and relative to the weight of the support, (c) at least 20% by weight of the metal oxides on the support being in finely divided form with a particle size of less than 40 nanometers, and (d) regenerating the support loaded with metal-sulfur compounds by oxidizing said metal-sulfur compounds by passing over of gases including oxidizing agents.
Claim 3
Dependent Claim
13 words
Process according to claim 1, characterized in that the gases are reducing gases.
Claim 4
Dependent Claim
16 words
Process according to claim 2, characterized in that coal gas is used as the reducing gas.
Claim 5
Dependent Claim
52 words
Process according to claim 3, characterised in that the coal gas, as a dry gas, contains the following components: 2- 50% of H 2 18-70% of CO 2-30% of CO 2 0-15% of CH 4 0.01-5% of H 2 S <-2% of COS, CS 2 , HCl, NH 3 and other components.
Claim 6
Dependent Claim
13 words
Process according to claim 1, characterised in that the gases are natural gases.
Claim 7
Dependent Claim
40 words
Process according to claim 1, characterised in that the support is loaded with the metal oxide in an amount of at least 20% by weight, calculated as metal of the active component and relative to the weight of the support.
Claim 8
Dependent Claim
24 words
Process according to claim 1, characterised in that the absorption of the sulfur compounds is carried out at temperatures of 200° to 800° C.
Claim 9
Dependent Claim
14 words
Process according to claim 1, characterised in that the metal oxide is iron oxide.
Claim 10
Dependent Claim
31 words
Process according to claim 1, characterised in that at least 50% by weight of the metal oxides on the support are present with a particle size of less than 40 nm.
Claim 11
Dependent Claim
32 words
Process according to claim 1, characterised in that regeneration is carried out at temperatures of 20° to 700° C. and sulfur, if present, is driven off at temperatures above about 200° C.
Claim 12
Dependent Claim
19 words
Process according to claim 1, characterised in that regeneration is carried out at temperatures of 200° to 700° C.
Claim 13
Dependent Claim
21 words
Process according to claim 1, characterised in that the gas used for regeneration contains less than 5% by volume of oxygen.
Claim 14
Dependent Claim
33 words
Process according to claim 1, characterised in that the gases containing sulfur compounds contain oxygen in an amount which is such that the atomic ratio of oxygen to sulfur does not exceed 1.
Claim 15
Dependent Claim
17 words
Process according to claim 1, wherein the gas passed over the absorption mass contains H 2 S.
Claim 16
Dependent Claim
15 words
Process according to claim 1, wherein the gas passed over the absorption mass contains COS.
Claim 17
Dependent Claim
17 words
Process according to claim 1, wherein the gas passed over the absorption mass contains CS 2 .
Claim 18
Dependent Claim
151 words
A process for removal of mercaptans and/or thiophene from gases, comprising: (a) passing the gas containing mercaptan or thiophene at a temperature of from 5° to 800° C. over an absorption mass including metal oxides which react with the sulfur compound to give metal-sulfur compounds and which metal oxides are present on an inert, refractory support having a specific surface area of more than 10 m 2 per g, (b) said support being loaded with the metal oxide in an amount of at least 5% by weight, calculated as metal of the active component and relative to the weight of the support, (c) at least 20% by weight of the metal oxides on the support being in finely divided form with a particle size of less than 40 nanometers, and (d) regenerating the support loaded with metal-sulfur compounds by oxidizing said metal-sulfur compounds by passing over of gases including oxidizing agents.
Claim 19
Dependent Claim
151 words
A process for removal of mercaptans and/or thiophene from gases, comprising: (a) passing the gas containing mercaptan or thiophene at a temperature of from 5° to 800° C. over an absorption mass including metal oxides which react with the sulfur compound to give metal-sulfur compounds and which metal oxides are present on an inert, refractory support having a specific surface area of more than 10 m 2 per g, (b) said support being loaded with the metal oxide in an amount of at least 5% by weight, calculated as metal of the active component and relative to the weight of the support, (c) at least 20% by weight of the metal oxides on the support being in finely divided form with a particle size of less than 40 nanometers, and (d) regenerating the support loaded with metal-sulfur compounds by oxidizing said metal-sulfur compounds by passing over of gases including oxidizing agents.
Claim 20
Dependent Claim
38 words
Process according to claim 6, wherein the support is loaded with the metal oxide in an amount of at least 40% by weight calculated as metal of the active component and relative to the weight of the support.
Claim 21
Dependent Claim
22 words
Process according to claim 7, wherein the absorption of the sulfur compounds is carried out at temperatures of 300° to 600° C.
Claim 22
Dependent Claim
29 words
Process according to claim 9, wherein at least 50% by weight of the metal oxides on the support are present with a particle size of less than 20 nanometers.
References Cited (Backward Citations)
US2777823A
Cited
US3404099A
Cited
GB1220105A
Cited
DE1767202A1
Cited
US3840479A
Cited
US3579293A
Cited
DE2144567A1
Cited
GB1351786A
Cited
US4088736A
Cited
DE2614307A1
Cited
US4155990A
Cited
US4190560A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-10-23 | 1988-04-23 | 1988-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-23 | 1992-04-23 | 1992-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-23 | 1996-04-23 | 1996-10-23 | $7700.00 | Window Closed / Lapsed |