The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 14, 1976
Filed:
Sep. 07, 1973
Edward F Steigelmann, Park Forest, IL (US);
Robert D Hughes, Park Forest, IL (US);
Standard Oil Company, Chicago, IL (US);
Abstract
Semi-permeable membranes are made from polyamides, especially N-alkoxyalkyl polyamides, and water-soluble polyvinyl alcohols. The membranes are preferably formed as fibers. The membranes can be made from compositions containing the polymer components and a di(lower alkyl) sulfoxide, e.g. dimethyl sulfoxide. The membranes may contain complex-forming metal components. The membranes are useful for separating chemicals from their mixtures by techniques using an aqueous liquid barrier and complex-forming metals, e.g. for the separation of aliphatically-unsaturated hydrocarbons such as ethylene from close-boiling hydrocarbons.