A polyethylene imine membrane which has been cross-linked by heat treating at 100. degree. C. -200. degree. C. for 3-20 minutes may be used to dewater isopropanol or methyl ethyl ketone/toluene mixtures.
Process For Pervaporization Using Membrane Separating Means
Mordechai Pasternak - Spring Valley NY Craig R. Bartels - Wappingers Falls NY John Reale - Wappingers Falls NY
Assignee:
Texaco Inc. - White Plains NY
International Classification:
C07C 7144 B01D 1300
US Classification:
585818
Abstract:
Water is separated from an MEK toluene dewaxing solvent by pervaporation through a polyvinyl alcohol membrane (optionally containing polyacrylic acid) mounted on a polyacrylonitrile support layer.
John Reale - Wappingers Falls NY Craig R. Bartels - Wappingers Falls NY
Assignee:
Texaco Inc. - White Plains NY
International Classification:
B01D 1300
US Classification:
210640
Abstract:
Concentration of aqueous solutions of isopropanol may be effected by a composite membrane including a glutaraldehyde cross-linked polyvinyl alcohol bonded to a porous layer of polysulfone on a polyester backing.
Dewatering Of Concentrated Aqueous Solutions By Pervaporation
Mordechai Pasternak - Spring Valley NY John Reale - Wappingers Falls NY
Assignee:
Texaco Inc. - White Plains NY
International Classification:
B01D 1300 C07C 2976 C07C 3118
US Classification:
210638
Abstract:
Charge aqueous solution containing 85 w % ethylene glycol is concentrated by pervaporation across a sulfonated polyethylene membrane to yield retentate containing 95 w % ethylene glycol.
Mordechai Pasternak - Spring Valley NY Craig R. Bartels - Wappingers Falls NY John Reale - Wappingers Falls NY
Assignee:
Texaco Inc. - White Plains NY
International Classification:
C07K 4579
US Classification:
568410
Abstract:
Aqueous compositions containing organic oxygenates such as methyl isobutyl ketone are treated by pervaporation through a polyvinyl alcohol/polyacrylic acid membrane to yield retentate containing increased concentration of oxygenate.
A polyethylenimine membrane which has been cross-linked by heat treating at 100. degree. C. -200. degree. C. for 3-20 minutes may be used to dewater isopropanol or methyl ethyl ketone/toluene mixtures.
Craig R. Bartels - Wappingers Falls NY Tansukhlal G. Dorawala - Wappingers Falls NY Michael T. Stephenson - Katy TX Mordechai Pasternak - Spring Valley NY John Reale - Wappingers Falls NY
Assignee:
Texaco Inc. - White Plains NY
International Classification:
B01D 1300 C02F 140
US Classification:
210651
Abstract:
Aqueous liquor containing immiscible hydrocarbon liquid, such as produced water from an offshore petroleum drilling platform, is treated by gravity separation, skimming, and nanofiltration.
"We have more of our members who are moving into apartments right here in downtown, taking the light rail to work," said John Reale, Managing Director for Station Houston. "You see people on the streets grabbing lunch or coffee. It's cool."