Membrane made from a multi-block polymer comprising an oxazolidone prepolymer chain extended with a compatible second prepolymer and its use in separations

Patent · Tue Aug 13 00:00:00 EDT 1991

OSTI ID:5571383

Schucker, R C

This patent describes a method for separating aromatic hydrocarbons from feed streams. It comprises mixtures of aromatic hydrocarbons and non-aromatic hydrocarbons, the method comprising contacting the feed stream with one side of a membrane made from a multi-block polymer material comprising a first prepolymer comprising an oxazolidone made by combining (A) an epoxy with (B) a diisocyanate in an A/B or B/A mole ratio ranging from about 2.0 to 1.05, chain extended with a second, compatible prepolymer selected from the group of prepolymers consisting of an (A) diisocyanate combined with a monomer selected from (B) polyester, diamine, and dianhydride or its corresponding tetraacid or diacid-diester, in an A/B mole ratio ranging from about 2.0 to 1.05, an (A) dianhydride or its corresponding tetraacid or diacid-diester combined with a monomer selected from (B) epoxy, diisocyanate, polyester, and diamine, in an A/B mole ratio ranging from about 2.0 to 1.05, and an (A) diamine combined with a monomer selected from (B) epoxy, diisocyanate, and dianhydride or its corresponding tetraacid or diacid-diester, in an A/B mole ratio ranging from about 2.0 to 1.05, and mixtures thereof, the separation being conducted under pervaporation or perstraction conditions, whereby the aromatic hydrocarbon component of the feed stream selectively permeates through the membrane.

• Assignee: Exxon Research and Engineering Co., Florham Park, NJ (United States)
• Patent Number(s): US 5039418; A
• Application Number: PPN: US 7-624161
• OSTI ID: 5571383
• Resource Relation: Patent File Date: 6 Dec 1990
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
HYDROCARBONS
SEPARATION PROCESSES
PETROLEUM REFINERIES
MATERIALS TESTING
POLYMERS
MEMBRANES
AROMATICS
CHEMICAL FEEDSTOCKS
REFINING
INDUSTRIAL PLANTS
ORGANIC COMPOUNDS
PROCESSING
TESTING
020400* - Petroleum- Processing
400105 - Separation Procedures
020500 - Petroleum- Products & By-Products
023000 - Petroleum- Properties & Composition