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. 24, 2015
Filed:
Jul. 28, 2011
Thorsten Kreickmann, Oberhausen, DE;
Guido D. Frey, Riedstadt, DE;
Norman Nowotny, Essen, DE;
Heinz Strutz, Moers, DE;
Thorsten Kreickmann, Oberhausen, DE;
Guido D. Frey, Riedstadt, DE;
Norman Nowotny, Essen, DE;
Heinz Strutz, Moers, DE;
Oxea GmbH, Oberhausen, DE;
Abstract
The present invention relates to a process for obtaining ditrimethylolpropane and trimethylolpropane-enriched product streams from the high-boiling fractions and residues which are obtained in the distillative purification of trimethylolpropane, wherein an aqueous solution of these fractions and residues is catalytically hydrogenated in the presence of an acidic compound and, after removing solids, contacted both with basic and with acidic ion exchangers. A trimethylolpropane-enriched product stream can be distilled out of the aqueous eluate obtained, leaving ditrimethylolpropane as the distillation residue.