Method for recovering hydrocarbon vapor
AssigneeNippon Kokan Kabushiki Kaisha
InventorsMoritake Kato, Norio Inoue, Yoshiki Shibuya
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Abstract
A method for recovering hydrocarbon vapor wherein permeable mixed gases of high concentration hydrocarbon vapor and the residual mixed gases of low concentration hydrocarbon vapor are separated, through gas separation membrane, from initial mixed gases containing hydrocarbon vapor to absorb permeable mixed gases, and a method for recovering hydrocarbon vapor wherein initial mixed gases containing hydrocarbon vapor are brought into contact with liquid absorbent to recover hydrocarbon vapor, and gases of high concentration hydrocarbon vapor and gases of low concentration hydrocarbon vapor are separated, through gas separation membrane, from treated gases from which hydrocarbon vapor has been absorbed in the preceeding process.
Claims23
A method for recovering hydrocarbon vapor from initial mixed gases containing hydrocarbon vapor, which comprises the steps of:
- separating the inital mixed gases into permeable mixed gases of high concentration hydrocarbon vapor and residual mixed gases of low concentration hydrocarbon vapor, with a gas separation membrane having an inlet side and a pass-out side,;
- and
- bringing said permeable mixed gases of high concentration hydrocarbon vapor into contact with liquid absorbent in an adsorption column to absorb hydrocarbon vapor therefrom, leaving unabsorbed return gases.
A method for recovering hydrocarbon vapor which comprises the steps of:
- bringing initial mixed gases containing hydrocarbon vapor into contact with liquid absorbent in an absorption column to absorb hydrocarbon vapor and leaving unabsorbed treated mixed gases;
- separating the treated mixed gases into permeable mixed gases of high concentration hydrocarbon vapor and residual mixed gases of low concentration hydrocarbon vapor, with a gas separation membrane having an inlet and a pass-out side;
- and
- returning said permeable mixed gases to be mixed with said initial mixed gases.
A method for recovering hydrocarbon vapor from initial mixed gases containing hydrocarbon vapor comprising separating the initial mixed gases into permeable mixed gases of high concentration hydrocarbon vapor and residual mixed gases of low concentration hydrocarbon vapor with a separation membrane;
- and bringing said permeable mixed gases into contact with a liquid absorbent to absorb hydrocarbon vapors from said permeable mixed gases.
A method for recovering hydrocarbon vapor from initial mixed gases containing hydrocarbon vapor comprising bringing said initial mixed gases into contact with a liquid absorbent to absorb hydrocarbon vapors therefrom to form treated mixed gases;
- separating the treated mixed gases into permeable mixed gases of high concentration hydrocarbon vapor and residual mixed gases of low concentration hydrocarbon vapor with a separation membrane;
- and returning the permeable mixed gases to be mixed with the initial mixed gases.
Dependencies are inferred from the claim text.