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. 18, 1986
Filed:
Dec. 12, 1984
Jurg Merz, Biel-Benken, CH;
Walter Voser, Allschwil, CH;
Ciba-Geigy Corporation, Ardsley, NY (US);
Abstract
Ionically modified cellulose material in which the ionic moiety is linked to the cellulose moiety via the carbonyl group of the bridge member --CO--NH--CH.sub.2 --O-- is suitable for being employed as the stationary phase in processes for separating mixtures of ionically charged components by chromatography, if the ionically modified cellulose material is obtainable from microcrystalline wood cellulose in the form of powder, as the starting material, the cellulose having a degree of polymerization of 490 to 550, and the cellulose powder consisting of particles having a specific BET surface area of 0.8 to 1.1 m.sup.2 /g and a degree of swelling in water at 20.degree. C. of 4 to 6 ml/g.