US3856925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for manufacture of hydrogen and carbonyl sulfide from hydrogen sulfide and carbon monoxide
Assignee: National Institute of Advanced Industrial Science and Technology
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Filing: 1972-08-17
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Granted: 1974-12-24
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Expires: 1992-08-17
Abstract
Abstract Hydrogen is produced from hydrogen sulfide by using, as a catalyst, the sulfide of a metal selected from the class consisting of transition metals of Group V such as vanadium, of Group IV such as molybdenum, tungsten and chromium and of group VIII such as iron, cobalt, nickel, palladium and rhodium of the Periodic Table of the Elements. When hydrogen sulfide is supplied to a reaction system using therein the said catalyst, it is separated into hydrogen and sulfur and the sulfur thus separated is deposited and accumulated on the catalyst. Regeneration of the catalyst is accomplished by causing carbon monoxide or nitrogen monoxide to react on the deposited sulfur so that the sulfur is removed from the catalyst in the form of carbonyl sulfide or nitrogen oxysulfide.
Inventors
- 👤 K Fukuda
- 👤 Y Kodera
- 👤 N Todo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:21
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/02; C01B3/06; C01B3/12; B; B01; B01J; B01J27/00; B01J27/02; B01J27/04; B01J37/00; B01J37/20; C01B32/00; C01B32/70; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/36; Y02P; Y02P20/00; Y02P20/50; Y02P20/584
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
100 words
A METHOD FOR THE MANUFACTURE OF HYDROGEN AND CARBONYL SULFIDE FROM HYDROGEN SULFIDE AND CARBON MONOXIDE, WHICH COMPRISES CONTINUOUSLY SUPPLYING UNDER NORMAL PROCESS FLOW A MIXED GAS OF HYDROGEN SULFIDE AND CARBON MONOXIDE TO A REACTION VESSEL PACKED WITH A CATALYST SELECTED FROM THE GROUP CONSISTING OF VANADIUM SULFIDE, CHROMIUM SULFFIDE, MOLYBDENUM SULFIDE, TUNGSTEN SULFIDE, IRON SULFIDE, COBALT SULFIDE, NICKEL SULFIDE, RHODIUM SULFIDE, PALLADIUM SULFIDE AND PLATINUM SULFIDE, SAID CATALYST TEMPERATURE BEING BETWEEN ROOM TEMPERATURE AND A TEMPERATURE NOT HIGHER THAN 500*C, THEREBY PRODUCING HYDROGEN AND CARBONYL SULFIDE FROM SAID HYDROGEN SULFIDE AND CARBON MONOXIDE IN SAID REACTION VESSEL, CONTINU-
Claim 2
Independent Claim
100 words
A METHOD FOR THE MANUFACTURE OF HYDROGEN AND CARBONYL SULFIDE FROM HYDROGEN SULFIDE AND CARBON MONOXIDE, WHICH COMPRISES CONTINUOUSLY SUPPLYING UNDER NORMAL PROCESS FLOW A MIXED GAS OF HYDROGEN SULFIDE AND CARBON MONOXIDE TO A REACTION VESSEL PACKED WITH A CATALYST SELECTED FROM THE GROUP CONSISTING OF VANADIUM SULFIDE, CHROMIUM SULFFIDE, MOLYBDENUM SULFIDE, TUNGSTEN SULFIDE, IRON SULFIDE, COBALT SULFIDE, NICKEL SULFIDE, RHODIUM SULFIDE, PALLADIUM SULFIDE AND PLATINUM SULFIDE, SAID CATALYST TEMPERATURE BEING BETWEEN ROOM TEMPERATURE AND A TEMPERATURE NOT HIGHER THAN 500*C, THEREBY PRODUCING HYDROGEN AND CARBONYL SULFIDE FROM SAID HYDROGEN SULFIDE AND CARBON MONOXIDE IN SAID REACTION VESSEL, CONTINU-
Claim 3
Dependent Claim
60 words
The method set forth in claim 1, wherein the reaction vessel is initially packed with one member selected from the group consisting of vanadium oxide, chromium oxide, molybdenum oxide, tungsten oxide, iron oxide, cobalt oxide, nickel oxide, rhodium oxide, palladium oxide and platinum oxide, prior to supplying hydrogen sulfide to said reaction vessel, whereby said oxide is converted into sulfide.
Claim 4
Dependent Claim
27 words
The method set forth in claim 1, wherein the non-reacted hydrogen sulfide and carbon monoxide discharged from the reaction vessel are continuously returned to said reaction vessel.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |