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:
Oct. 01, 2002
Filed:
Nov. 21, 2001
Lawrence W. Miller, Palatine, IL (US);
John J. Senetar, Naperville, IL (US);
UOP LLC, Des Plaines, IL (US);
Abstract
The invention is a process for recovering heat and removing impurities from a reactor effluent stream withdrawn from a fluidized exothermic reaction zone for conversion of oxygenates into light olefins from an oxygenate feedstream. The process comprises a two-stage quench tower system to remove water from the reactor effluent stream in the first tower and recover heat from the reactor effluent to at least partially vaporize the feedstream by indirect heat exchange between the oxygenate feedstream and either a first stage overhead stream or a first stage pumparound stream. A drag stream withdrawn from the first tower comprises the majority of the impurities and higher boiling oxygenates. The second stage tower further removes water and provides a purified water stream which requires minimal water stripping to produce a high purity water stream. The invention concentrates the impurities into a relatively small stream and results in significant energy and capital savings.