Patent US1578737A successfully refreshed from Google Patents.
EP0247585A1
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EP
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Method for recovering hydrocarbon vapor
Assignee: JFE Engineering Corp
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Filing: 1987-05-26
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Granted: —
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Expires: 2007-05-26
Abstract
Abstract A method for recovering hydrocarbon vapor wherein permeable mixed gases (20) of high concentration hydrocarbon vapor and the residual mixed gases (18) of low concentration hydrocarbon vapor are separated, through gas separation membrane (16), from initial mixed gases (10) containing hydrocarbon vapor followed by absorption of hydrocarbon from the permeable mixed gases (20), and a method for recovering hydrocarbon vapor wherein initial mixed gases (10) containing hydrocarbon vapor are brought into contact with liquid absorbent (27) to recover hydrocarbon vapor, and gases of high concentration hydrocarbon vapor and gases of low concentration hydrocarbon vapor are separated, through gas separation membrane (16), from treated gases (46) from which hydrocarbon vapor has been absorbed in the preceeding process.
Inventors
- 👤 Moritaka Patent & Licence And Quality Kato
- 👤 Norio Patent & Licence And Quality Inoue
- 👤 Yoshiki Patent & Licence And Quality Shibuya
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 00:04
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/144; B; B01; B01D; B01D53/00; B01D53/14; B01D53/1431; B01D53/1443; B01D53/1487; B01D53/22; B01D53/229; C07C7/005
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
71 words
A method for recovering hydrocarbon vapor, which comprises the steps of: bringing said permeable mixed gases (20) of high concentration hydrocarbon vapor into contact with liquid absorbent (27) in an absorption column (24) to absorb hydrocarbon; characterized by comprising separating permeable mixed gases of high concentration hydrocarbon vapor and residual mixed gases (18) of low concentration hydrocarbon vapor, through gas separation membrane (16), from initial mixed gases (10) containing hydrocarbon vapor.
Claim 2
Independent Claim
71 words
A method for recovering hydrocarbon vapor, which comprises the steps of: bringing said permeable mixed gases (20) of high concentration hydrocarbon vapor into contact with liquid absorbent (27) in an absorption column (24) to absorb hydrocarbon; characterized by comprising separating permeable mixed gases of high concentration hydrocarbon vapor and residual mixed gases (18) of low concentration hydrocarbon vapor, through gas separation membrane (16), from initial mixed gases (10) containing hydrocarbon vapor.
Claim 3
Dependent Claim
44 words
A method according to claim 1, characterized by further comprising the additional step of returning return gases (32) containing hydrocarbon vapor, which has not been absorbed in said liquid absorbent to be mixed with said initial mixed gases, thereby said return gases being recycled.
Claim 4
Dependent Claim
29 words
A method according to claim 1 or 2, characterized by further comprising the additional step of removing mist and dust from said initial mixed gases through filter separator (14).
Claim 5
Dependent Claim
24 words
A method according to claim 1, 2 or 3, characterized by further comprising the additional step of releasing said residual gases to the air.
Claim 6
Independent Claim
26 words
A method according to any one of claims 1 to 4, characterized in that said initial mixed gases include mixed gases of air and hydrocarbon vapor.
Claim 7
Independent Claim
42 words
A method according to any one of claims 1 to 5, characterized in that said hydrocarbon vapor contained in said initial mixed gases are at least one selected from the group consisting of gasoline vapor, kerosene vapor, benzene vapor and alcohol vapor.
Claim 8
Independent Claim
45 words
A method according to any one of claims 1 to 6, characterized in that said step of separating permeable mixed gases through gas separation membrane includes keeping a pressure of the pass-out side of said gas separation membrane the atmospheric pressure (760 Torr) or less.
Claim 9
Independent Claim
60 words
A method according to any one of claims 1 to 7, characterized in that said step of separating permeable mixed gases through gas separation membrane includes increasing pressure of said permeable mixed gases before passing through said gas separation membrane and maintaining a pressure of the pass-out side of said gas separation membrane the atmospheric pressure (760 Torr) or more.
Claim 10
Independent Claim
33 words
A method according to any one of claims 1 to 8, characterized in that said gas separation membrane is at least one selected from the group consisting of silicon, acrylonitrile-butadiene and polyvinyl chloride.
Claim 11
Independent Claim
58 words
A method according to any one of claims 1 to 9, characterized in that said step of absorbing hydrocarbon vapor includes a step of bringing said permeable gases, introduced into the absorption column through the bottom of the absorption column, into contact with said liquid absorbent, supplied into the absorption column through the top of the absorption column.
Claim 12
Independent Claim
21 words
A method according to any one of claims 1 to 10, characterized in that said liquid absorbent is liquid of hydrocarbon.
Claim 13
Dependent Claim
32 words
A method according to claim 11, characterized in that said liquid of hydrocarbon is at least one selected from the group consisting of liquid gasoline, liquid kerosene, liquid benzene and liquid alcohol.
Claim 14
Independent Claim
92 words
A method for recovering hydrocarbon vapor which comprises the steps of: bringing initial mixed gases (10) containing hydrocarbon vapor into contact with liquid absorbent (27) in an absorption column (24) to absorb hydrocarbon vapor; and returning said permeable mixed gases (52) to be mixed with said initial mixed gases; characterized by comprising separating permeable mixed gases of high concentration hydrocarbon vapor and residual mixed gases (48) of low concentration hydrocarbon vapor, through gas separation membrane (16), from treated mixed gases (46) from which hydrocarbon vapor has been absorbed in the preceeding step.
Claim 15
Independent Claim
92 words
A method for recovering hydrocarbon vapor which comprises the steps of: bringing initial mixed gases (10) containing hydrocarbon vapor into contact with liquid absorbent (27) in an absorption column (24) to absorb hydrocarbon vapor; and returning said permeable mixed gases (52) to be mixed with said initial mixed gases; characterized by comprising separating permeable mixed gases of high concentration hydrocarbon vapor and residual mixed gases (48) of low concentration hydrocarbon vapor, through gas separation membrane (16), from treated mixed gases (46) from which hydrocarbon vapor has been absorbed in the preceeding step.
Claim 16
Dependent Claim
24 words
A method according to claim 13, characterized by further comprising the additional step of releasing said residual mixed gases of low concentration hydrocarbon vapor.
Claim 17
Dependent Claim
23 words
A method according to claim 13 or 14, characterized in that said initial mixed gases include mixed gases of air and hydrocarbon vapor.
Claim 18
Dependent Claim
34 words
A method according to claim 13, 14 or 15, characterized in that said hydrocarbon vapor is at least one selected from the group consisting of gasoline vapor, kerosene vapor, benzene vapor and alcohol vapor.
Claim 19
Independent Claim
43 words
A method according to any of claims 13 to 16, characterized in that said step of separating permeable mixed gases of hydrocarbon vapor includes keeping a pressure of the pass-out side of said gas separation membrane the atmospheric pressure (760 Torr) or less.
Claim 20
Independent Claim
33 words
A method according to any one of claims 13 to 17, characterized in that said gas separation membrane is at least one selected from the group consisting of silicon, acrylonitrile-butadien and polyvinyl chloride.
Claim 21
Independent Claim
56 words
A method according to any one of claims 13 to 18, characterized in that said step of absorbing hydrocarbon vapor includes bringing said permeable mixed gases, introduced into the absorption column through the bottom of the absorption column, into contact with said liquid absorbent, supplied into the absorption column through the top of the absorption column.
Claim 22
Independent Claim
21 words
A method according to any one of claims 13 to 19, characterized in that said liquid absorbent is liquid of hydrocarbon.
Claim 23
Dependent Claim
32 words
A method according to claim 20, characterized in that said liquid of hydrocarbon is at least one selected from the group consisting of gasoline liquid, kerosene liquid, benzene liquid and alcohol liquid.
References Cited (Backward Citations)
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