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US3816332A Expired / Lapsed US ⏱️ 0.0 years remaining

Synthesis gas production

Assignee: Texaco Development Corp
•
Filing: 1971-04-07
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Granted: 1974-06-11
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Expires: 1991-04-07
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Abstract

Abstract This is a process for the production of synthesis gas substantially free from entrained particulate carbon. The product gas is preferably produced substantially free from volatile hydrocarbon contaminants. A feedstock comprising fresh liquid hydrocarbon oil is introduced into a distillation zone and separated into a light liquid hydrocarbon fraction and a heavy liquid hydrocarbon fraction. The light hydrocarbon fraction in admixture with a preheated slurry produced subsequently in a gas scrubbing zone and comprising particulate carbon and said heavy liquid hydrocarbon fraction are introduced into the reaction zone of a free flow noncatalytic synthesis gas generator and reacted by partial oxidation with oxygen and steam at an autogenous temperature in the range of 1,500*-3,000* F. to produce synthesis gas comprising hydrogen, carbon monoxide, and appreciable amounts of entrained particulate carbon. The effluent gas from the reaction zone is cooled by indirect heat exchange and is then scrubbed free of said entrained particulate carbon in a gas scrubbing zone with said heavy liquid hydrocarbon fraction and carbon slurries thereof. The scrubbing zone is preferably maintained at a temperature and pressure so that undue stripping of volatile fractions from the scrubbing fluid is prevented. When desired, water and any vaporized hydrocarbon in the overhead from the scrubber may be condensed out and separated from the product gas stream.

Inventors

  • 👤 C Marion

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 19:32
CPC Classifications
C; C10; C10K; C10K1/00; C10K1/08; C10K1/16; B; B01; B01D; B01D53/00; B01D53/14; B01D53/1412; B01D53/1487; C01; C01B; C01B3/00; C01B3/02; C01B3/22; C01B3/32; C01B3/34; C01B3/36; Y; Y02; Y02P; Y02P20/00; Y02P20/10; Y02P20/129

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 29 words
cooling the effluent gas stream from said gas generator to a temperature of about 600* F. by indirect heat exchange with water in a cooling zone thereby producing steam;
Claim 2
Dependent Claim 78 words
The process of claim 1 further provided with the step of introducing at least a portion of the particulate carbon-liquid hydrocarbon slurry of (3) in admixture with at least a portion of the light liquid hydrocarbon fraction of (1) into said partial oxidation reaction zone of said gas generator as feed; and wherein the pressures in said cooling and scrubbing zones are substantially the same as the pressure in said gas generator less ordinary drop in the line.
Claim 3
Dependent Claim 117 words
intimately contacting and scrubbing the cooled effluent gas stream from (2) in a scrubbing zone at a pressure of at least 1,500 psig with scrubbing fluid having a temperature in the range of about 400* to 600* F., said scrubbing fluid being selected from the group consisting of heavy liquid hydrocarbon fraction as produced in step (1) and a dispersion comprising said heavy liquid hydrocarbon fraction and particulate carbon; producing a particulate carbon-liquid hydrocarbon slurry and an effluent gas stream product comprising principally carbon monoxide and hydrogen that is substantially free from entrained particulate carbon and wherein less than 10 mole percent of said heavy liquid hydrocarbon scrubbing fluid is volatilized into said effluent gas stream product.
Claim 4
Dependent Claim 269 words
The process of claim 1 whereby the contacting and scrubbing in step (3) is effected in said scrubbing zone by; a. introducing the cooled effluent gas stream from step (2) below the surface of a portion of said heavy liquid hydrocarbon fraction-particulate carbon dispersion scrubbing fluid contained in a vessel, whereby said scrubbing fluid enters said vessel as a liquid dispersion containing about 0.2 to 1.5 weight percent of particulate carbon and leaves said vessel as a liquid dispersion containing about 2 to 20 weight percent of particulate carbon; b. passing the effluent gas stream leaving (a) through the axial passage of a nozzle-type gas scrubber at a velocity in the range of about 100 to 400 ft. per second, employing said effluent gas stream to atomize a scrubbing fluid consisting of a portion of said heavy liquid hydrocarbon fraction-particulate carbon dispersion containing about 0.2 to 1.5 weight percent of particulate carbon into fine droplets and collecting particulate carbon from the effluent gas stream onto these drops, whereby from about 5 to 10 gallons of said scrubbing fluid per 1,000 standard cubic feet of effluent gas are injected into the effluent gas stream at the throat of said nozzle gas scrubber; and c. initmately contacting the effluent gas stream leaving (b) in a vessel with a portion of the heavy liquid hydrocarbon fraction produced in step (1) to produce said heavy liquid hydrocarbon fraction-particulate carbon dispersion containing about 0.2 to 1.5 weight percent of particulate carbon for use in steps (a) and (b), whereby substantially all of the entrained particulate carbon is removed from said effluent gas stream product.
Claim 5
Dependent Claim 48 words
The process of claim 1 wherein the cooling of said effluent gas stream in step (2) is effected by indirect heat exchange with water in a waste-heat boiler and a portion of the steam thereby produced is supplied to provide heat in the distillation zone of step (1).
Claim 6
Dependent Claim 46 words
The process of claim 1 further provided with the steps of cooling the effluent product gas stream from step (3) to a temperature below the dew point, and condensing out and separating water and any volatilized hydrocarbon from said product gas stream and from each other.
Claim 7
Dependent Claim 91 words
The process of claim 4 further provided with the step of mixing a sufficient amount of the steam produced in said waste-heat boiler with said effluent gas stream from said reaction zone so that the H2O/CO mole ratio of the gaseous mixture is in the range of about 0.5 to 6, and reacting said gaseous mixture in a separate reaction zone by the noncatalytic water-gas shift reaction at a temperature in the range of about 2,800* to 1, 500* F. to increase the amount of hydrogen in said effluent gas stream.
Claim 8
Dependent Claim 100 words
The process of claim 4 further provided with the steps of mixing a portion of the steam produced in said waste-heat boiler with the effluent product gas stream leaving the scrubbing zone producing a gaseous mixture having a H2O/CO mole ratio in the range of about 0.5 to 6; and reacting said gaseous mixture at a temperature in the range of about 350* to 1,050* F. over a water-gas shift catalyst selected from the group consisting of promoted iron oxide, and supported sulfided cobalt-molybdenum oxide, so as to produce a shifted product gas stream containing an increased amount of hydrogen.

References Cited (Backward Citations)

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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) 1977-06-10 1977-12-10 1978-06-11 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-06-10 1981-12-10 1982-06-11 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-06-10 1985-12-10 1986-06-11 $7700.00 Window Closed / Lapsed

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