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:
May. 29, 2007
Filed:
Apr. 29, 2004
Luc R. M. Martens, Meise, BE;
James R. Lattner, Seabrook, TX (US);
Rutton D. Patel, Arlington, VA (US);
David C. Skouby, Centreville, VA (US);
Stephen Neil Vaughn, Kingwood, TX (US);
Yun-feng Chang, Houston, TX (US);
Jesse F. Goellner, Houston, TX (US);
Mareel J. Janssen, Kessel-Lo, BE;
Richard C. Senior, Fairfax, VA (US);
Luc R. M. Martens, Meise, BE;
James R. Lattner, Seabrook, TX (US);
Rutton D. Patel, Arlington, VA (US);
David C. Skouby, Centreville, VA (US);
Stephen Neil Vaughn, Kingwood, TX (US);
Yun-feng Chang, Houston, TX (US);
Jesse F. Goellner, Houston, TX (US);
Mareel J. Janssen, Kessel-Lo, BE;
Richard C. Senior, Fairfax, VA (US);
ExxonMobil Chemical Patents Inc., Houston, TX (US);
Abstract
This invention provides processes for maintaining a desired particle size distribution in an oxygenate to olefin reaction system. In one embodiment, the invention comprises replacing lost catalyst fines with less active co-catalyst particles. By adding less active co-catalyst particles to the reaction system, desirable fluidization characteristics and hydrodynamics can be maintained without affecting the overall (or primary catalyst) performance and product selectivities. The invention is also directed to a population of catalyst particles having a desirable particle size distribution well-suited for realizing ideal fluidization and hydrodynamic characteristics.