Patent application number | Description | Published |
20090192341 | Method Of Circulating Catalyst Between A Catalyst Regenerator And An External Catalyst Cooler - This invention relates to efficiently regenerating catalyst particles by minimizing the formation of localized “hot spots” and “cold spots” in a regeneration zone. Specifically this invention relates to a method for controlling regenerator temperature in an oxygenates-to-olefins system, comprising the steps of: contacting an oxygenate feed in a reactor with a catalytically effective amount of molecular sieve-containing catalyst under conditions effective for converting said oxygenate to a product containing light olefins and forming a coked catalyst; contacting a portion of the coked catalyst in a regenerator, having a catalyst bed height (H | 07-30-2009 |
20110020186 | Fluidizing A Population of Catalyst Particles Having A Low Catalyst Fines Content - The present invention relates to processes for fluidizing a population of catalyst particles that are depleted of catalyst fines. In one embodiment, the process includes providing a plurality of catalyst particles in the reactor, wherein the catalyst particles have a d | 01-27-2011 |
20110021857 | Method And Apparatus For Regenerating Catalyst During Oxygenates To Olefins Reaction - Disclosed herein is a method of recovery of the activity of a molecular sieve catalyst following use of the catalyst in an OTO conversion process. This is achieved by a regeneration apparatus and a method of regenerating a molecular sieve catalyst, comprising two stages. In a pretreatment stage, the catalyst is pretreated under pretreatment conditions by heating the catalyst to a temperature of between 320° C. to 700° C. in an oxygen depleted medium for a residence time of between 1 minute to two hours; and, in a regeneration stage, the catalyst is regenerated under regeneration conditions by heating the catalyst at a temperature of between 200° C. to 700° C. in an oxidizing medium for a residence time of between 1 to 60 minutes. | 01-27-2011 |
20110190556 | Transalkylation of Heavy Aromatic Hydrocarbon Feedstocks - In a process for producing xylene by transalkylation of a C | 08-04-2011 |
20120024755 | Purification of Transalkylation Feedstock - A guard bed or absorber is placed upstream of a transalkylation reactor to avoid deposition of halide and/or halogen species on the catalysts in said reactor. | 02-02-2012 |
20120244049 | Transalkylation of Heavy Aromatic Hydrocarbon Feedstocks - In a process for producing xylene by transalkylation of a C | 09-27-2012 |
20130259775 | Transalkylation Of Heavy Aromatic Hydrocarbon Feedstocks - In a process for producing xylene by transalkylation of a C | 10-03-2013 |
20130267748 | Catalyst Regeneration Process - This disclosure relates to a process for regenerating a catalyst composition to improve the aging rate in subsequent cycles. | 10-10-2013 |
20140061095 | Preheating Feeds to Hydrocarbon Pyrolysis Products Hydroprocessing - The invention relates to upgraded pyrolysis products, hydroconversion processes for upgrading products obtained from hydrocarbon pyrolysis, equipment useful for such processes. In particular the invention provides methods for reducing coke fouling in such equipment. | 03-06-2014 |