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:
Aug. 13, 2019
Filed:
Nov. 08, 2017
Ome Technologies Gmbh, Kaiserslautern, DE;
Jakob Burger, Kaiserslautern, DE;
Niklas Schmitz, Kaiserslautern, DE;
Hans Hasse, Kaiserslautern, DE;
Eckhard Stroefer, Mannheim, DE;
OME TECHNOLOGIES GMBH, Kaiserslautern, DE;
Abstract
Process for preparing polyoxymethylene dimethyl ethers having ≥3 oxymethylene units (OME), comprising the steps: (i) introduction of formaldehyde, methanol and water into a reactor R and reaction to give a reaction mixture containing formaldehyde, water, methylene glycol, polyoxymethylene glycols, methanol, hemiformals, methylal (OME) and polyoxymethylene dimethyl ethers (OME);(ii) introduction of the reaction mixture into a reactive distillation column Kand separation into a low boiler fraction Fcontaining formaldehyde, water, methylene glycol, polyoxymethylene glycols, methanol, hemiformals, methylal (OME) and polyoxymethylene dimethyl ethers having from 2 to 3 oxymethylene units (OME) and a high boiler fraction Fcontaining polyoxymethylene dimethyl ethers having more than two oxymethylene units (OME).