US3759036A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power generation
Assignee: Chevron USA Inc
•
Filing: 1970-03-01
•
Granted: 1973-09-18
•
Expires: 1990-03-01
Abstract
Abstract A process for gasifying waste material and producing energy which comprises contacting a solid organic waste material containing at least 10 weight percent oxygen with steam in the presence of an alkali metal carbonate catalyst at an elevated temperature to obtain a gas, combusting at least a portion of said gas to obtain combusted gases, and expanding the combusted gases through a turbine to rotate the turbine. Preferably, the energy of the rotating turbine is used to drive an electricity generator. It is strongly preferred to use a potassium carbonate catalyst in the gasification of the oxygen-containing waste material. Preferably feedstocks include ordinary municipal refuse or garbage having the requisite oxygen content and usually having a more preferred oxygen content above at least 20 weight percent oxygen.
Inventors
- 👤 R White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:37
CPC Classifications
F; F23; F23G; F23G5/00; F23G5/44; F23G5/46; C; C01; C01B; C01B3/00; C01B3/02; C01B3/22; C01B3/32; C01B3/34; C01B3/38; C01B3/40; C10; C10J; C10J3/00; C10K; C10K1/00; C10K1/002; C10K1/003; C10K1/004; C10K1/005; C10K3/00; C10K3/02; C10K3/04; F02; F02C; F02C3/00; F02C3/20; F02C3/26; F02C3/28; F23G5/02; F23G5/027; C01B2203/00; C01B2203/10; C01B2203/1041; C01B2203/1047; C10J2300/00; C10J2300/16; C10J2300/164; C10J2300/1643; C10J2300/165; C10J2300/18; C10J2300/1846; Y; Y02; Y02E; Y02E20/00; Y02E20/12; Y02E20/16; Y02E20/18; Y02E50/00; Y02E50/10; Y02P; Y02P20/00; Y02P20/141; Y02P20/145; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
17 words
The process in accordance with claim 1 wherein the turbine is used to drive an electricity generator.
Claim 2
Dependent Claim
9 words
combusting at least a portion of said gas; and
Claim 3
Dependent Claim
33 words
rotating a turbine by expanding said combusted gas through the turbine; and said organic waste material containing at least 10 weight percent chemically bonded oxygen and containing less than 5 weight percent sulfur.
Claim 4
Dependent Claim
18 words
The process in accordance with claim 1 wherein the alkali metal catalyst is potassium carbonate or sodium carbonate.
Claim 5
Dependent Claim
15 words
The process in accordance with claim 1 wherein the alkali metal catalyst is potassium carbonate.
Claim 6
Dependent Claim
20 words
The process in accordance with claim 1 wherein the temperature in the reaction zone is maintained between 700*F. and 2,000*F.
Claim 7
Dependent Claim
20 words
The process in accordance with claim 1 wherein the temperature in the reaction zone is maintained between 1,000*F. and 1,400*F.
Claim 8
Dependent Claim
63 words
The process in accordance with claim 1 wherein a gas comprising oxygen is fed to the reaction zone and a portion of the solid organic waste feed material to the reaction zone is burned with the oxygen to providE at least a portion of the endothermic heat of reaction for the conversion of the organic feed material plus steam to combustible synthesis gas.
Claim 9
Dependent Claim
24 words
The process in accordance with claim 1 wherein the oxygen content of the solid organic waste feed material is at least 20 weight percent.
Claim 10
Dependent Claim
23 words
The process in accordance with claim 1 wherein the oxygen content in the organic feed material is between 35 and 70 weight percent.
Claim 11
Dependent Claim
83 words
The process for gasifying waste material and producing energy which comprises forming a combustible synthesis gas by contacting a mixture of solid organic waste material containing at least 10 weight percent chemically combined oxygen and containing less than 5 weight percent sulfur, and 1 to 50 weight percent of a potassium carbonate catalyst with steam at a temperature between 1,000*F, and 1,400*F., combusting at least a portion of the combusting gas to obtain combusted gases, and expanding the combusted gases through a turbine.
Claim 12
Dependent Claim
21 words
The process in accordance with claim 10 wherein the turbine is used to drive an electrical generator to produce electrical power.
Claim 13
Dependent Claim
30 words
The process in accordance with claim 10 wherein the organic feed material is solid waste material selected from the group consisting of solid municipal waste, industrial waste, or agricultural waste.
Claim 14
Dependent Claim
29 words
The process in accordance with claim 1 wherein the solid organic waste material feedstock is selected from the group consisting of municipal solid wastes, agricultural wastes and dried sewage.
Claim 15
Dependent Claim
18 words
The process in accordance with claim 1 wherein the solid organic waste material feedstock is a cellulosic material.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |