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:
May. 16, 2023
Filed:
Jun. 10, 2021
Applicant:
Cyclolab Cyclodextrin Research and Development Laboratory Ltd., Budapest, HU;
Inventors:
Tamas Sohajda, Halasztelek, HU;
Gabriella Hirschbergne Szejtli, Budapest, HU;
István Puskás, Budapest, HU;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08B 37/16 (2006.01); C08B 37/00 (2006.01); B01J 39/05 (2017.01); B01J 41/05 (2017.01);
U.S. Cl.
CPC ...
C08B 37/0012 (2013.01); B01J 39/05 (2017.01); B01J 41/05 (2017.01); C08B 37/0003 (2013.01);
Abstract
Present invention relates to a process to reduce butane sultone hydrolysis products (4-hydroxybutane-1-sulfonic acid, and bis(4-sulfobutyl) ether disodium) in sulfobutylether cyclodextrin reaction mixtures achieved with the combined use of a strong anion exchange resin having dialkyl 2-hydroxyethyl ammonium hydroxide functionality and a cation exchange resin.