Diaphragm for gas-liquid contact, gas-liquid contact apparatus and process for producing liquid containing gas dissolved therein
AssigneeDainippon Ink and Chemical, Inc.
InventorsTakanori Anazawa, Hideki Watanabe
Life of this patent
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Abstract
A diaphragm for gas-liquid contact comprising a membrane having two surfaces, at least one surface of the membrane is hydrophilic and surfaces of micropores present in the membrane are hydrophobic. The diaphragm is used in contact apparatus in which a liquid is contacted with the hydrophilic surface of the membrane and a gas is contacted with the other surface. The diaphragm is used in a process for producing a liquid containing a gas dissolved therein, which comprises introducing a liquid into contact with the hydrophilic surface of the membrane and a gas into contact with the other surface of the membrane and having the gas pass through the membrane and dissolve in the liquid.
Claims25
A process for producing a liquid containing a gas dissolved therein, which comprises introducing a liquid into a hydrophilic side of a diaphragm for gas-liquid contact wherein the diaphragm comprises a single membrane or a laminate of at least two membranes, at least one surface of the membrane is hydrophilic and all surfaces of micropores present in the membrane are essentially hydrophobic, and introducing a gas into the other side of the membrane for gas-liquid contact.
A diaphragm comprising a single membrane for gas-liquid contact, wherein at least one surface of the membrane is hydrophilic and all surfaces of micropores present in the membrane are essentially hydrophobic, and the thickness of said membrane is 5 to 1,000 micrometers and the micropores are 10 micrometers or less in size.
A diaphragm-type gas-liquid contact apparatus comprising a single membrane in which at least one surface is hydrophilic and all surfaces of micropores present in the membrane are essentially hydrophobic, and a liquid is contacted with the at least one hydrophilic surface of the membrane, and a gas is contacted with the other surface and the thickness of said membrane is 5 to 1,000 micrometers and the micropores are 10 micrometers or less in size.
A diaphragm for gas-liquid contact in which the diaphragm membrane is a hollow fiber type heterogeneous membrane or independent foam membrane, wherein the inner surface of said membrane is hydrophilic and all surfaces of micropores present in the membrane are essentially hydrophobic.
A membrane-type liquid-gas contact apparatus in which a membrane which is a hollow fiber type heterogeneous membrane or independent foam membrane, wherein the inner surface of said membrane is hydrophilic and all surfaces of micropores present in the membrane are essentially hydrophobic, is used as a diaphragm, and a liquid is contacted with the inner side of said hollow fiber membrane.
A membrane-type gas-liquid contact apparatus in which a membrane composed of a membrane, which is a hollow fiber type heterogeneous membrane or independent foam membrane, wherein the inner surface of said membrane is hydrophilic and all surfaces of micropores present in the membrane are essentially hydrophobic, has no housing and is directly dipped in a liquid.
A diaphragm for gas-liquid contact comprising a single membrane having two surfaces, said membrane containing micropores which have surfaces extending through said membrane to each of said two surfaces, wherein at least one of the membrane surfaces is hydrophilic and all the micropore surfaces are essentially hydrophobic, said at least one hydrophilic membrane surface is for contact with a liquid and said other membrane surface is for contact with a gas.
A diaphragm for gas-liquid contact comprising a hollow fiber membrane having an inner surface and an outer surface, said membrane containing micropores which have surfaces extending through said membrane to each of said inner and outer surfaces, wherein at least one of the membrane surfaces is hydrophilic and all the micropore surfaces are essentially hydrophobic, said at least one hydrophilic member surface is for contact with a liquid and said other membrane surface is for contact with a gas.
Dependencies are inferred from the claim text.