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:
Jan. 28, 2020
Filed:
Feb. 16, 2017
Basf SE, Ludwigshafen am Rhein, DE;
Dominic Riedel, Ludwigshafen, DE;
Joaquim Henrique Teles, Ludwigshafen, DE;
Heiner Schelling, Ludwigshafen, DE;
Ulrike Wegerle, Worms, DE;
Ulrich Mueller, Ludwigshafen, DE;
Andrei-Nicolae Parvulescu, Ludwigshafen, DE;
Jochen Mannweiler, Ludwigshafen, DE;
Timo Henn, Ludwigshafen, DE;
Thomas Luederitz, Ludwigshafen, DE;
Nicolai Tonio Woerz, Ludwigshafen, DE;
Christian Mueller, Ludwigshafen, DE;
Markus Weber, Ludwigshafen, DE;
Daniel Urbanczyk, Ludwigshafen, DE;
BASF SE, Ludwigshafen am Rhein, DE;
Abstract
A continuous process for the preparation of propylene oxide, comprising a start-up stage and normal run stage, wherein the normal run stage comprises (i) continuously providing a liquid feed stream comprising propene, hydrogen peroxide, acetonitrile, a formate salt, water and optionally propane, wherein in the liquid feed stream, the molar amount of the formate salt relative to the molar amount of hydrogen peroxide at a given point of time during the normal run stage is a(Fo/HO); (ii) continuously passing the liquid feed stream provided in (i) into an epoxidation zone comprising a catalyst comprising a titanium zeolite having framework type MWW, and subjecting the liquid feed stream to epoxidation reaction conditions in the epoxidation zone, obtaining a reaction mixture comprising propylene oxide, acetonitrile, water, the formate salt, optionally propene, and optionally propane; (iii) continuously removing an effluent stream from the epoxidation zone, the effluent stream comprising propylene oxide, acetonitrile, water, at least a portion of the formate salt, optionally propene, and optionally propane; wherein the normal run stage is characterized in an average rate of change of a(Fo/HO) of less than 0 h.