Separation of organic liquids

Patent · Tue Jan 17 00:00:00 EST 1989

OSTI ID:6054404

Pasternak, M; Bartels, C R; Reale, J Jr

The method is described comprising: concentrating a charge solution containing methanol and either dimethyl carbonate or methyl t-butyl ether oxygenate by, maintaining a membrane of non-porous separating layer of cast polyvinyl alcohol which has been crosslinked with an aliphatic polyaldehyde containing at least three carbon atoms including those in the aldehyde groups; maintaining a pressure drop across the non-porous separating layer of polyvinyl alcohol; passing a charge aqueous solution containing methanol and either dimethyl carbonate or methyl t-butyl ether oxygenate into contact with the high pressure side of the non-porous separating layer of polyvinyl alcohol having properties which enable at least a portion of the methanol in the charge solution and a lesser portion of oxygenate to pass by pervaporation through the non-porous separating layer of polyvinyl alcohol as a lean mixture containing more methanol and less oxygenate than are present in the charge solution and the charge solution is converted to a rich liquid containing less methanol and more oxygenate than are present in the charge solution; recovering as permeate from the low pressure side of the non-porous separating layer of polyvinyl alcohol the lean mixture containing more methanol and less oxygenate than are present in the charge solution, the lean mixture being recovered in vapor phase at a pressure below the vapor pressure thereof; and recovering as retentate from the high pressure side of the non-porous separating layer the rich liquid containing a lower methanol content and a higher oxygenate content than are present in the charge solution.

• Assignee: Texaco Inc., White Plains, NY
• Patent Number(s): US 4798674
• OSTI ID: 6054404
• Resource Relation: Patent File Date: Filed date 10 Mar 1988
• Country of Publication: United States
• Language: English

Related Subjects

10 SYNTHETIC FUELS
METHANOL
SEPARATION PROCESSES
ALCOHOLS
ALDEHYDES
AQUEOUS SOLUTIONS
BUTYL RADICALS
CARBONATES
CROSS-LINKING
ETHERS
METHYL RADICALS
POLYVINYLS
ALKYL RADICALS
CARBON COMPOUNDS
CHEMICAL REACTIONS
DISPERSIONS
HYDROXY COMPOUNDS
MIXTURES
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC POLYMERS
OXYGEN COMPOUNDS
POLYMERIZATION
POLYMERS
RADICALS
SOLUTIONS
090221* - Alcohol Fuels- Chemical Synthesis- (1976-1989)