Method and apparatus for recovery of H.sub.2 and C.sub.2 and heavier components
AssigneeKrause/Pasadyn, a Partnership
InventorsWilliam A. Krause, Ronald C. Pasadyn
Life of this patent
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Abstract
A process and apparatus for separating a hydrocarbon gas into fractions containing predominant portions of hydrogen, methane, and C.sub.2 and heavier components, where the methane and lighter components are separated from the feed gas under non-cryogenic conditions to produce a hydrogen-rich fraction, a first fraction rich in C.sub.2 and heavier components and a hydrocarbon-rich fraction, the hydrocarbon-rich fraction then being separated under cryogenic conditions into a second fraction rich in C.sub.2 and heavier components and a methane-rich fraction.
Claims13
A method of separating a hydrocarbon gas into a fraction containing a predominant portion of hydrogen, a fraction containing a predominant portion of the C.sub.2 and heavier components, and a fraction containing the residual components comprising:
- (a) separating the feed gas into a first hydrocarbon-rich liquid and a H.sub.2 -rich vapor;
- (b) separating the H.sub.2 -rich vapor into a second, substantially H.sub.2 vapor and a first hydrocarbon-rich vapor;
- (c) separating at temperatures above -30.8.degree. F. the first hydrocarbon-rich liquid into a second hydrocarbon-rich liquid comprised substantially of C.sub.2 and heavier components and a second hydrocarbon-rich vapor;
- (d) compressing the first and second hydrocarbon-rich vapors to produce a third hydrocarbon-rich vapor and a third hydrocarbon-rich liquid;
- and
- (e) separating at or below -30.8.degree. F. the third hydrocarbon-rich vapor and the third hydrocarbon-rich liquid into a fourth liquid comprised substantially of C.sub.2 and heavier components and a fourth vapor containing a predominant portion of methane.
A method of separating a hydrocarbon gas into a fraction containing a predominant portion of hydrogen, a fraction containing a predominant portion of the C.sub.2 and heavier components and a fraction containing the residual components comprising:
- (a) separating the feed gas into a first hydrocarbon-rich liquid and a H.sub.2 -rich vapor;
- (b) separating the H.sub.2 -rich vapor into a second, substantially H.sub.2 vapor and a first hydrocarbon-rich vapor;
- (c) separating at temperatures above -30.8.degree. F. the first hydrocarbon-rich liquid into a second hydrocarbon-rich liquid comprised substantially of C.sub.2 and heavier components and a second hydrocarbon-rich vapor;
- (d) compressing the first and second hydrocarbon-rich vapors to produce a partially liquid hydrocarbon-rich stream;
- and
- (e) separating at or below -30.8.degree. F. the partially liquid hydrocarbon-rich stream into a third liquid comprised substantially of C.sub.2 and heavier components and a third vapor containing the residual components from the partially liquid hydrocarbon-rich stream.
A method of separating a hydrocarbon gas into a fraction containing a predominant portion of hydrogen, a fraction containing a predominant portion of the C.sub.2 and heavier components and a fraction containing the residual components comprising:
- (a) separating the feed gas into a first hydrocarbon-rich liquid and a H.sub.2 -rich vapor;
- (b) separating the H.sub.2 -rich vapor into a second, substantially H.sub.2 vapor and a first hydrocarbon-rich vapor;
- (c) separating at temperatures above -30.8.degree. F. the first hydrocarbon-rich liquid into a second hydrocarbon-rich liquid comprised substantially of C.sub.2 and heavier components and a second hydrocarbon-rich vapor;
- (d) compressing the first and second hydrocarbon-rich vapors to produce a partially liquid hydrocarbon-rich stream;
- and
- (e) separating the partially liquid hydrocarbon-rich stream into a third liquid comprised substantially of C.sub.2 and heavier components and a third vapor containing substantially all of the methane and lighter components in the partially liquid hydrocarbon-rich stream.
A method of separating a hydrocarbon gas into a fraction containing a predominant portion of hydrogen, a fraction containing a predominant portion of the C.sub.2 and heavier components and a fraction containing the residual components comprising:
- (a) separating the feed gas into a first hydrocarbon-rich liquid and a H.sub.2 -rich vapor;
- (b) separating the H.sub.2 -rich vapor into a second, substantially H.sub.2 vapor and a first hydrocarbon-rich vapor;
- (c) separating at temperatures above -30.8.degree. F. the first hydrocarbon-rich liquid into a second hydrocarbon-rich liquid comprised substantially of C.sub.2 and heavier components and a second hydrocarbon-rich vapor;
- (d) compressing the first and second hydrocarbon-rich vapors to produce a partially liquid hydrocarbon-rich stream;
- and
- (e) separating at or below -30.8.degree. F. the partially liquid hydrocarbon-rich stream into a third liquid comprised substantially of C.sub.2 and heavier components and a third vapor containing substantially all of the components from the partially liquid hydrocarbon-rich stream that are lighter than C.sub.2.
A method of separating a hydrocarbon gas into a fraction containing a predominant portion of hydrogen, a fraction containing a predominant portion of the C.sub.2 and heavier components and a fraction containing the residual components comprising:
- (a) separating the feed gas into a first hydrocarbon-rich liquid and a H.sub.2 -rich vapor;
- (b) separating the H.sub.2 -rich vapor into a second, substantially H.sub.2 vapor and a first hydrocarbon-rich vapor;
- (c) separating at temperatures above -30.8.degree. F. the first hydrocarbon-rich liquid into a second hydrocarbon-rich liquid comprised substantially of C.sub.2 and heavier components and a second hydrocarbon-rich vapor;
- (d) compressing the first and second hydrocarbon-rich vapors to produce a partially liquid hydrocarbon-rich stream;
- and
- (e) separating at or below -30.8.degree. F. the partially liquid hydrocarbon-rich stream into a third liquid comprised substantially of C.sub.2 and heavier components and a third vapor containing the remainder of the components from the partially liquid hydrocarbon-rich stream.
A method of separating a hydrocarbon gas into a fraction containing a predominant portion of hydrogen, a fraction containing a predominant portion of the C.sub.2 and heavier components and a fraction containing the residual components comprising:
- (a) separating the feed gas into a solid comprised primarily of water and glycol, a first hydrocarbon-rich liquid and a H.sub.2 -rich vapor;
- (b) separating the H.sub.2 -rich vapor into a second, substantially H.sub.2 vapor and a first hydrocarbon-rich vapor;
- (c) separating at temperatures above -30.8.degree. F. the first hydrocarbon-rich liquid into a second hydrocarbon-rich liquid comprised substantially of C.sub.2 and heavier components and a second hydrocarbon-rich vapor;
- (d) dehydrating and cooling the first and second hydrocarbon-rich vapors to produce a third hydrocarbon-rich vapor and a third hydrocarbon-rich liquid;
- (e) separating at or below -30.8.degree. F. the third hydrocarbon-rich vapor and the third hydrocarbon-rich liquid into a fourth liquid comprised substantially of C.sub.2 and heavier components and a fourth vapor containing a predominant portion of the methane and lighter components.
A method of recovering a predominant portion of the C.sub.2 and heavier components in a feed gas comprising:
- (a) demethanizing the feed gas at temperatures above -30.8.degree. F. to produce a substantially C.sub.2 and heavier component stream and a methane and lighter component-rich stream;
- (b) demethanizing the methane and lighter component-rich stream at or below -30.8.degree. F. to produce a second substantially C.sub.2 and heavier component stream and a residue stream.
A method of separating a hydrocarbon gas into a fraction containing a predominant portion of hydrogen, a fraction containing a predominant portion of the C.sub.2 and heavier components and a fraction containing the residual components comprising:
- (a) separating the feed gas into a first hydrocarbon-rich liquid and a H.sub.2 -rich vapor;
- (b) separating the H.sub.2 -rich vapor into a second, substantially H.sub.2 vapor and a first hydrocarbon-rich vapor;
- (c) demethanizing the first hydrocarbon-rich liquid at temperatures above -30.8.degree. F. to produce a substantially C.sub.2 and heavier component stream and a methane and lighter component-rich stream;
- (d) demethanizing the methane and lighter component-rich stream and the first hydrocarbon-rich vapor at or below -30.8.degree. F. to produce a second substantially C.sub.2 and heavier component stream and a residue stream.
A method of recovering C.sub.2 and heavier hydrocarbon components from a hydrocarbon gas comprising:
- (a) separating the feed gas into a first fraction containing substantially methane and lighter components and a second fraction comprised substantially of C.sub.2 and heavier components at temperature above -30.8.degree. F.;
- and
- (b) separating the residual methane and lighter components from the second fraction at or below -30.8.degree. F. temperatures.
Dependencies are inferred from the claim text.