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:
Dec. 20, 2011
Filed:
Sep. 08, 2008
Bala Subramaniam, Lawrence, KS (US);
Daryle H. Busch, Lawrence, KS (US);
Hyun-jin Lee, Lawrence, KS (US);
Madhav Ghanta, Lawrence, KS (US);
Tie-pan Shi, Bartlesville, OK (US);
Bala Subramaniam, Lawrence, KS (US);
Daryle H. Busch, Lawrence, KS (US);
Hyun-Jin Lee, Lawrence, KS (US);
Madhav Ghanta, Lawrence, KS (US);
Tie-Pan Shi, Bartlesville, OK (US);
University of Kansas, Lawrence, KS (US);
Abstract
A process for the selective oxidation of olefins to epoxides comprising the step of contacting the olefin (propylene or ethylene) with an oxidant (hydrogen peroxide) in the presence of a Lewis acid oxidation catalyst (MTO), organic base (pyridine or its N-oxide), in a solvent system comprising an organic water-miscible solvent (methanol). The system is pressurized using either the olefin itself or by adding an inert pressurizing gas (nitrogen) to increase the pressure between 230 and 700 psi at a temperature between 0.7 and 1.3 times the critical temperature of the olefin. The resulting increased solubility of the olefin in the organic solvent system increases the selectivity and yield of the desired epoxide (propylene oxide or ethylene oxide).