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:
Mar. 18, 2014
Filed:
Aug. 19, 2009
Robert G. Bowman, Woodbury, MN (US);
Eric E. Stangland, Midland, MI (US);
Mark E. Jones, Midland, MI (US);
Dean M. Millar, Midland, MI (US);
Simon G. Podkolzin, Midland, MI (US);
Brien A. Stears, League City, TX (US);
Richard M. Wehmeyer, Lake Jackson, TX (US);
Robert G. Bowman, Woodbury, MN (US);
Eric E. Stangland, Midland, MI (US);
Mark E. Jones, Midland, MI (US);
Dean M. Millar, Midland, MI (US);
Simon G. Podkolzin, Midland, MI (US);
Brien A. Stears, League City, TX (US);
Richard M. Wehmeyer, Lake Jackson, TX (US);
Dow Global Technologies LLC, Midland, MI (US);
Abstract
Oxidatively halogenate methane by placing a feedstream that comprises methane, a source of halogen, a source of oxygen and, optionally, a source of diluent gas in contact with a first catalyst (e.g. a solid super acid or a solid super base) that has greater selectivity to methyl halide and carbon monoxide than to methylene halide, trihalomethane or carbon tetrahalide. Improve overall selectivity to methyl halide by using a second catalyst that converts at least part of the feedstream to a mixture of methyl halide, methylene halide, trihalomethane, carbon tetrahalide and unreacted oxygen, and placing that mixture in contact with the first catalyst which converts at least a portion of the methylene halide, trihalomethane and carbon tetrahalide to carbon monoxide, hydrogen halide and water.