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:
Mar. 14, 1978
Filed:
Dec. 02, 1976
Masahiko Ozaki, Okayama, JA;
Shigeru Nakajima, Okayama, JA;
Japan Exlan Company Limited, Osaka, JA;
Abstract
A process for purifying an acrylic fiber solvent solution which comprises (1) feeding an acrylic fiber solvent containing impurities or an aqueous solution thereof to a packed layer of a polymer consisting of one or more kinds of ester type monomers containing at least one polymerizable double bond and at least one ethylene oxide unit per molecule or a polymer consisting of such monomer(s) and one or more kinds of monomers containing at least one polymerizable double bond for one molecule, to cause said layer to catch the impurities and fiber solvent, (2) passing an eluent through said packed layer thus eluting the impurities together with the eluent, and (3) passing a further amount of the eluent through the packed layer thereby separating an eluate containing the fiber solvent.