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US4487683A Expired / Lapsed US ⏱️ 0.0 years remaining

Acetylene from coal and an electric arc

Assignee: Combustion Engineering Inc
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Filing: 1982-07-26
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Granted: 1984-12-11
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Expires: 2002-07-26
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Abstract

Abstract A process for producing hydrocarbons suitable for use as a chemical feedstock uses coal (10) and methane-rich gas (56) as raw materials. The coal and gas are heated over 6000° F. (3316° C.) in an electric-arc (14) forming an atomic plasma (16). The plasma is cooled and held (18) between 5000° and 6000° F. (2760° and 3316° C.) to allow formation of the desired hydrocarbons. The product stream (22) is then quenched (24) and the hydrocarbons separated (40, 42).

Inventors

  • 👤 Carl R. Bozzuto

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 21:46
CPC Classifications
C; C07; C07C; C07C1/00; C07C2/00; C07C2/76; C07C2/80; Y; Y10; Y10S; Y10S585/00; Y10S585/929; Y10S585/943

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 125 words
A process for producing acetylene from coal and methane-rich gas comprising the steps of: (a) heating said coal and said methane-rich gas to a peak temperature over 6000° F. in an electric-arc to form a plasma; (b) cooling the plasma of step (a) to less than 6000 F.; (c) maintaining the temperature of the cooled plasma at a temperature within the range of 5000 to 6000 F. for approximately 60 milliseconds to form a substantially equilibrated mixture of chemical compounds including said acetylene; and (d) quickly quenching the compounds following step (c) to a substantially lower temperature in less than 30 milliseconds whereby the chemical activity between the formed compounds is substantially stopped and the chemical composition of the quenched mixture is maintained substantially unchanged.
Claim 2
Dependent Claim 125 words
A process for producing acetylene from coal and methane-rich gas comprising the steps of: (a) heating said coal and said methane-rich gas to a peak temperature over 6000° F. in an electric-arc to form a plasma; (b) cooling the plasma of step (a) to less than 6000 F.; (c) maintaining the temperature of the cooled plasma at a temperature within the range of 5000 to 6000 F. for approximately 60 milliseconds to form a substantially equilibrated mixture of chemical compounds including said acetylene; and (d) quickly quenching the compounds following step (c) to a substantially lower temperature in less than 30 milliseconds whereby the chemical activity between the formed compounds is substantially stopped and the chemical composition of the quenched mixture is maintained substantially unchanged.
Claim 3
Dependent Claim 21 words
The process of claim 1 wherein the peak temperature in step (a) is in the range of 8,000 to 10,000 F.
Claim 4
Dependent Claim 35 words
The process of one of claims 1 or 2 comprising the additional step of: (e) separating at least a portion of the acetylene from the compounds produced in step (c), leaving a combustible fuel gas.
Claim 5
Dependent Claim 39 words
The process of claim 3 comprising the additional step of: (f) mixing at least a portion of the combustible fuel gas obtained in step (e) with a methane-rich gas and feeding the mixture to the electric-arc of step (a).
Claim 6
Dependent Claim 41 words
The process of claim 3 comprising the additional step of: (g) combusting at least a portion of the fuel gas obtained from step (e) in a heat exchange device for heating the methane-rich gas fed to the electric-arc in step (a).
Claim 7
Dependent Claim 41 words
The process of claim 4 comprising the additional step of: (g) combusting at least a portion of the fuel gas obtained from step (e) in a heat exchange device for heating the methane-rich gas fed to the electric-arc in step (a).
Claim 8
Dependent Claim 44 words
The process of claim 2 comprising the additional steps of: (h) separating inert ash compounds from the compound mixture of step (c); and (i) separating the ash compounds from step (h) into a ferrous portion and a nonferrous portion, whereby steel may be recovered.
Claim 9
Dependent Claim 48 words
The process of one of claims 1 or 2 comprising the additional steps of: (j) feeding an additional sulfur absorbent compound to the electric-arc of step (a) for absorbing sulfur present within said coal; and (k) separating the absorbed sulfur from said acetylene and the combustible fuel gas.
Claim 10
Dependent Claim 15 words
The process of claim 8 wherein the sulfur absorbent compound is a calcium bearing compound.

References Cited (Backward Citations)

US3384467A Cited
US4010089A Cited
US4010090A Cited
US4105888A Cited
US4378232A Cited
US4358629A Cited
US4412908A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1987-12-11 1988-06-11 1988-12-11 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1991-12-11 1992-06-11 1992-12-11 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1995-12-11 1996-06-11 1996-12-11 $7700.00 Window Closed / Lapsed

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