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. 15, 2017
Filed:
Aug. 24, 2016
Basf SE, Ludwigshafen, DE;
Dow Global Technologies Llc, Midland, MI (US);
Joaquim Henrique Teles, Waldsee, DE;
Dominic Riedel, Waldsee, DE;
Bianca Seelig, Cologne, DE;
Philip Kampe, Singapore, SG;
Daniel Urbanczyk, Griesheim, DE;
Markus Weber, Limburgerhof, DE;
Alexander Schroeder, Wattenheim, DE;
Andrei-Nicolae Parvulescu, Ruppertsberg, DE;
Ulrich Mueller, Neustadt, DE;
Meinolf Weidenbach, Stade, DE;
Werner J. Witzl, Stade, DE;
Holger Baer, Fredenback, DE;
BASF SE, Ludwigshafen, DE;
Dow Global Technologies LLC, Midland, MI (US);
Abstract
A continuous process for the preparation of propylene oxide, comprising (a) reacting propene, optionally admixed with propane, with hydrogen peroxide in a reaction apparatus in the presence of acetonitrile as solvent, obtaining a stream Scontaining propylene oxide, acetonitrile, water, at least one further component B, optionally propene and optionally propane, wherein the normal boiling point of the at least one component B is higher than the normal boiling point of acetonitrile and wherein the decadic logarithm of the octanol-water partition coefficient (log K) of the at least one component B is greater than zero; (b) separating propylene oxide from S, obtaining a stream Scontaining acetonitrile, water and the at least one further component B; (c) dividing Sinto two streams Sand S; (d) subjecting Sto a vapor-liquid fractionation in a fractionation unit, obtaining a vapor fraction stream Sbeing depleted of the at least one component B; (e) recycling at least a portion of S, optionally after work-up, to (a).