High pressure water-gas shift conversion process
    2.
    发明授权
    High pressure water-gas shift conversion process 失效
    高压水气转换转换过程

    公开(公告)号:US3652454A

    公开(公告)日:1972-03-28

    申请号:US3652454D

    申请日:1968-05-27

    Applicant: TEXACO INC

    CPC classification number: C01B3/16

    Abstract: HIGH PRESSURE CONTINUOUS CATALYTIC WATER-GAS SHIFT CONVERSION PROCESS IN WHICH CO CONVERSION IS MAXIMIZED AND AN EFFLUENT GAS STREAM COMPRISING ESSENTIALLY H2 AND CO2 IS PRODUCED HAVING A SUBSTANTIALLY CONSTANT COMPOSITION AT ALL TIMES THROUGHOUT THE LIFE OF THE CATALYST. PROCESS DESIGN AND OPERATION ARE OPTIMIZED TO YIELD AN OVERALL CO CONVERSION OF ABOUT FROM 80 TO 98 MOLE PERCENT OVER A PERIOD OF TWO YEARS OR MORE ON STREAM. STEAM AND A CO CONTAINING GASEOUS FEEDSTREAM ARE REACTED IN AN ADIABATIC CATALYTIC REACTION ZONE COMPRISING ONE OR MORE FIXED BEDS OF IRON-CHROMIUM OXIDE CATALYST CONNECTED IN SERIES AND PROVIDED WITH INTERBED COOLING. THE CATALYST IS CHARACTERIZED BY ITS ACTIVITY INCREASING AS A FUNCTION OF PRESSURE OVER THE OPERATING RANGE OF ABOUT 35 TO 250 ATMOSPHERES. THIS IS CONTRARY TO THE PRESENT GENERAL IDEA THAT THE ACTIVITY OF AN IRON OXIDE SHIFT CATALYST LEVELS OUT AT ABOUT 400 P.S.I.G. THE TEMPERATURE OF THE GASES LEAVING EACH BED IS MAINTAINED IN THE RANGE OF ABOUT 30*F. TO 100*F. LESS THAN THE CORRESPONDING EQUILIBRIUM TEMPERATURE AND TO OFFSET CATALYST DEACTIVATION THE INLET AND EXIT TEMPERATURES OF THE GAS STREAM IN EACH BED IS INCREASED AS A LOGARITHMIC FUNCTION OF TIME ON STREAM.

    Hydrotorting of shale to produce shale oil

    公开(公告)号:US3565784A

    公开(公告)日:1971-02-23

    申请号:US3565784D

    申请日:1968-12-26

    Applicant: TEXACO INC

    CPC classification number: C10G1/002 C01B3/22 C01B3/36 Y10S208/951

    Abstract: CONTINUOUS PROCESS FOR RECOVERING SHALE OIL FROM A SLURRY OF RAW OIL SHALE IN SHALE OIL. WATER AND HOT UNQUENCHED SYNTHESIS GAS FROM THE REACTION ZONE OF A PARTIAL OXIDATION GENERATOR ARE INJECTED INTO THE RAW OIL SHALE-SHALE OIL SLURRY UNDER PRESSURE AND THE MIXTURE IS IMMEDIATELY INTRODUCED INTO A NONCATALYTIC TUBULAR RETORT MAINTAINED AT A TEMPERATURE IN THE RANGE OF ABOUT 850 TO 950* F. AND AT A PRESSURE IN THE RANGE OF ABOUT 300 TO 1000 P.S.I.G., AND PREFERABLY AT 500 P.S.I.G. FOR MAXIMUM YIELDS OF SHALE OIL HAVING A MINIMUM NITROGEN CONTENT. SUBSTANTIALLY ALL OF THE HYDROGEN AND A LARGE FRACTION OF THE HEAT REQUIRED IN THE TUBULAR RETORT ARE PROVIDED BY THE SYNTHESIS GAS. IN THE TUBULAR RETORT ARE PROVIDED BY THE SYNTHESIS GAS. IN THE TUBULAR RETORT UNDER CONDITIONS OF TURBULENT FLOW, THE RAW SHALE IS COMPLETELY STRIPPED OF KEROGEN IN ABOUT 1/4 TO 3 MINUTES (PREFERABLY LESS THAN A MINUTE), AND BY SIMULTANEOUS PYROLYSIS AND HYDROGENATION THE KEROGEN IS CONVERTED TO A GASEOUS EFFLUENT FROM WHICH SHALE OIL IS SEPARATED. SIMULTANEOUSLY, HYDROGEN IS GENERATED IN THE TUBULAR RETORT BY THE EXOTHERMIC WATER-GAS SHIFT REACTION, WHEREBY CO IN THE SYNTHESIS GAS REACTS WITH H2O THE SPENT SHALE ACTING AS A SHIFT CATALYST. PURE HYDROGEN AND THE PREHYDROGENATED SHALE OIL ARE INTRODUCED INTO A CATALYTIC REACTOR TO PRODUCE DENITROGENATED AND DESULFURIZED SHALE OIL AT YIELDS OF ABOUT 125% OF THE FISCHER ASSAY. FEED TO THE SYNTHESIS GAS GENERATOR COMPRISES A PORTION OF THE HEAVY SHALE OILE AND STEAM PRODUCED BY THE PROCESS AND IN THIS RESPECT THE PROCESS IS SELF-SUSTAINING.

    Carbon recovery process
    7.
    发明授权
    Carbon recovery process 失效
    碳回收工艺

    公开(公告)号:US3615297A

    公开(公告)日:1971-10-26

    申请号:US3615297D

    申请日:1970-06-16

    Applicant: TEXACO INC

    CPC classification number: C10K1/10

    Abstract: A method for recovering oil-free particulate carbon from synthesis gas by washing said synthesis gas free from particulate carbon with water, preferably maintained at a pH in the range of about 7.5 to 10. A dispersion of particulate carbon in water is formed which is then contacted with bubbles of a gas selected from the group consisting of natural gas, methane, ethane, propane, butane, ethylene, propylene, synthesis gas and mixtures thereof. Clear water separates by gravity from the gas treated dispersion and a supernatant flowable slurry of particulate carbon in water having an increased concentration of oil-free particulate carbon is formed which may be recycled to the generator as fuel, or dewatered.

    Production of shale oil
    8.
    发明授权
    Production of shale oil 失效
    生产油脂

    公开(公告)号:US3617472A

    公开(公告)日:1971-11-02

    申请号:US3617472D

    申请日:1969-12-31

    Applicant: TEXACO INC

    CPC classification number: C10G1/06 C01B3/36

    Abstract: Process for recovering shale oil from oil shale by retorting with synthesis gas, i.e., a mixture of carbon monoxide and hydrogen, generated by partial combustion of byproduct gas with oxygen, wherein part of the heat required for retorting is provided by the hot synthesis gas, and additional hydrogen is produced in the oil shale retort by the water-gas shift reaction, the shale acting as a catalyst; and the process being selfsufficient in requiring no external source of water.

    Hydrotorting of shale to produce shale oil
    9.
    发明授权
    Hydrotorting of shale to produce shale oil 失效
    压缩生产油脂油

    公开(公告)号:US3617470A

    公开(公告)日:1971-11-02

    申请号:US3617470D

    申请日:1968-12-26

    Applicant: TEXACO INC

    CPC classification number: C10G1/065

    Abstract: Continuous process for recovering shale oil from a slurry of raw oil shale in shale oil. In a contacting zone, water and hydrogen gas are injected under pressure into the raw oil shale-shale oil slurry and the mixture is immediately introduced into a tubular retort maintained at a temperature in the range of about 850* to 950* F. and at a pressure in the range of about 300 to 1,000 p.s.i.g. and preferably at 500 p.s.i.g. for maximum yields of shale oil having a minimum nitrogen content. Under conditions of turbulent flow, in the tubular retort the raw shale is completely stripped of kerogen in about one-fourth to 3 minutes (preferably less than a minute), and by simultaneous pyrolysis and hydrogenation the kerogen is converted to a gaseous effluent from which shale oil is separated having a substantially reduced nitrogen and sulfur content. Further, essentially all of the spent shale is removed from the gaseous stream by means of a unique centrifugal separator and recovered without the loss of hydrogen or the reduction in line pressure, as spent shale containing essentially no carbonaceous residue. Yields of such shale oil from for example Colorado shale are about 116 percent of the Fischer Assay and contain less than 0.50 weight percent of spent shale. Water is also produced by the system in quantities which are in excess of process requirements.

    Hydrotorting of shale to produce shale oil

    公开(公告)号:US3617469A

    公开(公告)日:1971-11-02

    申请号:US3617469D

    申请日:1968-12-26

    Applicant: TEXACO INC

    CPC classification number: C10G1/065 C10G1/002

    Abstract: Continuous process for recovering shale oil from a slurry of raw oil shale in shale oil. Water and hydrogen gas are injected under pressure into the raw oil shale-shale oil slurry, and the mixture is immediately introduced into an externally heated noncatalytic tubular retort maintained at an outlet temperature in the range of about 850* to 950* F. and at a pressure in the range of about 300 to 1,000 p.s.i.g., and preferably at 500 p.s.i.g. for maximum yields of shale oil having a minimum nitrogen content. In the tubular retort under conditions of turbulent flow, the raw shale is completely stripped of kerogen in about 1/4 to 3 minutes (preferably less than a minute), and by simultaneous pyrolysis and hydrogenation without added catalyst, the kerogen is converted to a gaseous effluent from which shale oil is separated having a substantially reduced nitrogen and sulfur content. Yields of such shale oil from for example Colorado shale are about 116 percent of the Fischer Assay; however, if desired, still higher yields of shale oil (about 125 percent of the Fischer Assay) containing a greater amount of material in the middle distillate boiling range may be obtained by submitting the prehydrogenated gaseous effluent from the tubular reaction zone to catalytic hydrogenation, after first removing essentially all of the spent shale. Water is also produced by the system in quantities which are in excess of process requirements.

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