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:
Dec. 17, 1985
Filed:
Jun. 13, 1983
Applicant:
Inventors:
Heinz Pfenninger, Lupsingen, CH;
Beat Bruttel, Bockten, CH;
Assignee:
Ciba Geigy Corporation, Ardsley, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
210638 ; 210641 ;
Abstract
A process is described for converting sparingly soluble inorganic salts of cationic dyes and brighteners into more soluble salts of organic acids without intermediate isolation of the free base, wherein the counter-ion of the dye or brightener cation is replaced by the anion of a cyclic or acyclic organic acid by means of Donnan dialysis. Dye or brightener solutions obtained in this way are stable and can be directly used for dyeing or printing textile materials.