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US3909446A Expired / Lapsed US ⏱️ 0.0 years remaining

Method of manufacturing high quality reducing gas by two stage reforming processes

Assignee: JFE Engineering Corp
•
Filing: 1973-03-21
•
Granted: 1975-09-30
•
Expires: 1993-03-21
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Abstract

Abstract Liquid hydrocarbon containing substance such as crude oil, fuel oils and heavy oils or solid hydrocarbon containing substance such as coal and plastic scraps or discards is used as the source of hydrocarbon. Gas containing hydrocarbons produced by the heat decomposition of the source of hydrocarbon, or a gas mixture produced by admixing a gas produced by gasifying, atomizing or pulverizing the source of hydrocarbon with coke oven gas or a gas produced by heat decomposing the source of hydrocarbon by the action of steam containing oxygen, or by the action hydrogen, is admixed with furnace top gas discharged from the top of a reducing furnace and containing CO2 and H2O, and the resulting gas mixture is converted into the reducing gas consisting essentially of CO and H2 while the gas mixture is maintained at a predetermined high temperature.

Inventors

  • 👤 Isuneo Miyashita
  • 👤 Shoichiro Ozeki
  • 👤 Hiroaki Nishio
  • 👤 Tosio Nayuki
  • 👤 Tadashi Kobayashi
  • 👤 Gyoichi Suzuki
  • 👤 Tadashi Murakami

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 20:50
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/02; C01B3/22; C01B3/32; C01B3/34

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 105 words
IN A METHOD OF MANUFACTURING REDUCING GAS FROM HYDROCARBONS, THE IMPROVEMENT WHICH COMPRISES THE STEPS OF THERMALLY DECOMPOSING A HYDROCARBON SOURCE SELECTED FROM THE GROUP CONSISTING OF CRUDE OIL, A FUEL OIL, A HEAVY OIL, COAL AND PLASTIC IN THE PRESENCE OF STEAM CONTAINING OXYGEN OR IN THE PRESENCE OF HYDROGEN THEREBY FORMING AN INTERMEDIATE GAS, HEATING THE INTERMEDIATE GAS TO A TEMPERATURE OF FROM 150*C. TO 1100*C., ADMIXING THE HEATED INTERMEDIATE GAS WITH GAS HEATED TO A TEMPERATURE ABOVE 1100*C. AND CONTAINING CO2 AND H2O, AND MAINTAINING THE RESULTING GAS MIXTURE AT A TEMPERATURE ABOVE 1100*C. THEREBY IMPROVING THE QUALITY OF THE GAS MIXTURE.
Claim 2
Dependent Claim 105 words
IN A METHOD OF MANUFACTURING REDUCING GAS FROM HYDROCARBONS, THE IMPROVEMENT WHICH COMPRISES THE STEPS OF THERMALLY DECOMPOSING A HYDROCARBON SOURCE SELECTED FROM THE GROUP CONSISTING OF CRUDE OIL, A FUEL OIL, A HEAVY OIL, COAL AND PLASTIC IN THE PRESENCE OF STEAM CONTAINING OXYGEN OR IN THE PRESENCE OF HYDROGEN THEREBY FORMING AN INTERMEDIATE GAS, HEATING THE INTERMEDIATE GAS TO A TEMPERATURE OF FROM 150*C. TO 1100*C., ADMIXING THE HEATED INTERMEDIATE GAS WITH GAS HEATED TO A TEMPERATURE ABOVE 1100*C. AND CONTAINING CO2 AND H2O, AND MAINTAINING THE RESULTING GAS MIXTURE AT A TEMPERATURE ABOVE 1100*C. THEREBY IMPROVING THE QUALITY OF THE GAS MIXTURE.
Claim 3
Dependent Claim 49 words
The method according to claim 1 wherein said intermediate gas is formed by admixing a gasified, atomized or pulverized hydrocarbon source with a coke oven gas preheated to a temperature below 1100*C. after said hydrocarbon source has been heated to a temperature at which free carbon is not formed.
Claim 4
Dependent Claim 47 words
The method according to claim 1 wherein said intermediate gas is formed by thermally decomposing said hydrocarbon source by using an excess quantity of steam containing oxygen, or by using hydrogen and then cooling the decomposition gas to remove excess water, non-volatile components and impurities including sulfur.
Claim 5
Dependent Claim 40 words
The method according to claim 1 wherein said hydrocarbon source comprises high molecular weight hydrocarbon substances including plastic scraps or discards and the hydrocarbon source is thermally decomposed to obtain an intermediate gas containing hydrocarbons formed by the thermal decomposition.

References Cited (Backward Citations)

US3126276A Cited
US2577730A Cited
US2740706A Cited
US3189438A Cited
US3232728A Cited
US3303017A Cited
US3193378A Cited
US3607156A Cited
US3770421A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-09-29 1979-03-31 1979-09-30 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-09-29 1983-03-31 1983-09-30 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-09-29 1987-03-31 1987-09-30 $7700.00 Window Closed / Lapsed

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