Semipermeable membranes based on specified tetrabromobisphenol type polyesters

Patent · Tue Oct 08 00:00:00 EDT 1991

OSTI ID:5721239

Kawakami, J H; Muruganandam, N; Brode, G L

This patent describes a process for separating a component from an O{sub 2}/N or CO{sub 2}/CH{sub 4} gas mixture containing. It comprises: contracting the gas mixture with one side of a gas separation membrane comprising a thin layer predominantly of a polyester or copolyester derived form the reaction of an aromatic dicarboxylic acid or derivative thereof and greater than 50 mol percent of a tetrabromobisphenol, or divalent cyclododecyl and wherein the aromatic discarboxylic acid or divalent cyclododecyl and wherein the aromatic dicarboxylic acid or derivative thereof comprises 80 mole percent or more of isophthalic acid or its dichloride and/or 4-bromoisophthalic acid or its dichloride and 20 mole percent or less of terephthalic acid or its dichlorid and/or 2-bromoterephthalic acid or its dichloride as the dicarboxylic acid compound, or 30 mole percent or less of isophthaloyl dichloride and/or 4-homoisophthalic acid or its dichloride and 70 mole percent or more of terephthalic acid or its dichloride and/or 2-bromoterepohthalic acid or is dichloride; the membrane having a combination of high selectivity and high permeation rate values, while maintaining a pressure differential across the two sides of the membrane and removing the permeated component from the other side of the membrane.

• Assignee: Union Carbide Industrial Gases Technology Corp., Danbury, CT (United States)
• Patent Number(s): US 5055114; A
• Application Number: PPN: US 7-443207
• OSTI ID: 5721239
• Country of Publication: United States
• Language: English

Related Subjects

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105 -- Separation Procedures
ALKANES
AROMATICS
BROMINATED AROMATIC HYDROCARBONS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTION KINETICS
ESTERS
HALOGENATED AROMATIC HYDROCARBONS
HYDROCARBONS
KINETICS
MEMBRANES
METHANE
ORGANIC BROMINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC POLYMERS
OXIDES
OXYGEN COMPOUNDS
POLYESTERS
POLYMERS
PROCESSING
REACTION KINETICS
REFINING
SEPARATION EQUIPMENT
SEPARATION PROCESSES