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. 22, 2003
Filed:
Jun. 11, 2001
Applicant:
Inventors:
Holger Krummradt, Pfungstadt, DE;
Klaus Beschmann, Reinheim, DE;
Frank-Hardi Wartenberg, Darmstadt, DE;
Horst Diekmann, Darmstadt, DE;
Assignee:
Merck Patent GmbH, Darmstadt, DE;
Primary Examiner:
Int. Cl.
CPC ...
C07F 9/6558 ;
U.S. Cl.
CPC ...
C07F 9/6558 ;
Abstract
The invention relates to a method for removing phosphoric acid, thiamine triphosphate and higher thiamine phosphates from solutions that contain phosphoric acid, thiamine monophosphate, thiamine diphosphate, diamine triphosphate and higher phosphates. The inventive method is characterized by passing the phosphoric acid solution of thiamine phosphates over a non-ionogenic adsorber resin which comprises unsaturated cyclic nitrogen bases and eluting thiamine monophosphate and thiamine diphosphate with a suitable solvent.