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:
Nov. 23, 2021
Filed:
Apr. 13, 2018
Basf SE, Ludwigshafen am Rhein, DE;
Nicolai Tonio Woerz, Ludwigshafen, DE;
Ulrich Mueller, Ludwigshafen, DE;
Andrei-Nicolae Parvulescu, Ludwigshafen, DE;
Dominic Riedel, Ludwigshafen, DE;
Marvin Kramp, Ludwigshafen, DE;
Daniel Urbanczyk, Ludwigshafen, DE;
Ulrike Wegerle, Worms, DE;
Christian Mueller, Ludwigshafen, DE;
Bernd Metzen, Ludwigshafen, DE;
Markus Weber, Ludwigshafen, DE;
Joaquim Henrique Teles, Ludwigshafen, DE;
BASF SE, Ludwigshafen am Rhein, DE;
Abstract
The invention relates to a process for preparing propylene oxide, comprising (i) providing a stream comprising propene, propane, hydrogen peroxide or a source of hydrogen peroxide, water, and an organic solvent; (ii) passing the liquid feed stream provided in (i) into an epoxidation zone comprising an epoxidation catalyst comprising a titanium zeolite, and subjecting the liquid feed stream to epoxidation reaction conditions in the epoxidation zone, obtaining a reaction mixture comprising propene, propane, propylene oxide, water, and the organic solvent; (iii) removing an effluent stream from the epoxidation zone, the effluent stream comprising propene, propane, propylene oxide, water, and the organic solvent; (iv) separating propene and propane from the effluent stream by distillation, comprising subjecting the effluent stream to distillation conditions in a distillation unit, obtaining a gaseous stream (S) which is enriched in propene and propane compared to the effluent stream subjected to distillation conditions, and a liquid bottoms stream (S) which is enriched in propylene oxide, water and organic solvent compared to the effluent stream subjected to distillation conditions; (v) separating propane from the stream (S) in a separation zone, comprising subjecting the stream (S) to washing conditions in a scrubber, wherein a solvent mixture comprising organic solvent and water is added as entraining agent, obtaining a bottoms stream (S), which comprises organic solvent, water and at least 70 weight-% of the propene comprised in (S); and a gaseous top stream (S), which comprises at least 5 weight-% of the propane comprised in stream (S).