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. 25, 2003
Filed:
Oct. 13, 2000
Stephen H. Brown, Princeton, NJ (US);
William A. Weber, Burlington, NJ (US);
Reuel Shinnar, Great Neck, NY (US);
Khushrav E. Nariman, Sugar Land, TX (US);
Larry A. Green, Mickleton, NJ (US);
Mark F. Mathias, Pitsford, NY (US);
David H. Olson, Pennington, NJ (US);
Robert A. Ware, Wyndmoor, PA (US);
ExxonMobil Chemical Patents Inc., Houston, TX (US);
Abstract
There is provided a process for converting methanol and/or dimethyl ether to a product containing C to C olefins which comprises the step of contacting a feed which contains methanol and/or dimethyl ether with a catalyst comprising a porous crystalline material. The contacting is conducted in the presence of a cofed aromatic compound under conversion conditions including a temperature of about 350° C. to about 550° C. and a methanol and/or dimethyl ether partial pressure less than or equal to 50 psia (345 kPa). The porous crystalline material used in the catalyst has a pore size greater than the critical diameter of the aromatic compound and a Diffusion Parameter for 2,2-dimethylbutane of about 0.1 to about 26 sec when measured at a temperature of 120° C. and a 2,2- dimethylbutane pressure of 60 torr (8 kPa), and the aromatic compound is capable of alkylation by the methanol and/or dimethyl ether under said conversion conditions.