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:
Jul. 21, 1992
Filed:
Sep. 07, 1990
Applicant:
Inventors:
Michael Diamantoglou, Erlenbach, DE;
Ernst Kundinger, Breuberg-Neustadt, DE;
Assignee:
Akzo N.V., , NL;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08B / ; B01D / ; C12N / ;
U.S. Cl.
CPC ...
536 56 ; 536124 ;
Abstract
Method of manufacturing deoxycellulose compounds from cellulose in aprotic solvents with LiCl and/or CaCl.sub.2, with the solvent, in addition to LiCl or CaCl.sub.2, additionally containing bromides, iodides, rhodanides, or dithiocarbamates of the alkaline and/or alkaline earth metals, and the cellulose initially being dissolved in the mixture of aprotic solvent and salts, with a base and/or a basic salt being added at room temperature, and a sulfonic acid halide being added corresponding to the desired degree of substitution, and then being caused to react at temperatures between 16.degree. C. and 100.degree. C.