Abstract: A counter-current catalyst regenerator with at least two stages of counter-current contact along with a regenerator riser is proposed. Each stage may comprise a permeable barrier that allows upward passage of oxygen-containing gas and downward passage of coked catalyst into each stage, but inhibits upward movement of catalyst to mitigate back mixing and approximate true counter-current contact and efficient combustion of coke from catalyst. The regenerator riser may provide a passage to transport the catalyst and may serve as a secondary stage for coke combustion to provide the regenerated catalyst.
Type:
Grant
Filed:
November 30, 2017
Date of Patent:
March 26, 2019
Assignee:
UPO LLC
Inventors:
Lev Davydov, Michael S. Sandacz, Paolo Palmas, Zhihao Fei, Matthew Lippmann
Abstract: One exemplary embodiment can be a process for cooling a vent stream from a receiver. Generally, the process may include providing a refrigerant including at least one compound contained in the receiver so the refrigerant leaking into the receiver can be compatible with the process.
Abstract: Methods and apparatuses for processing hydrocarbon streams are provided. In an embodiment, a method for processing a hydrocarbon stream includes heating a feed stream in a convective bank. In the method, the feed stream is reacted in a first reaction zone to form a first effluent. The first effluent is heated in a first radiant cell that combusts fuel gas to heat the first effluent and forms a first exhaust gas. The method includes contacting the first exhaust gas with the convective bank to heat the feed stream.
Type:
Application
Filed:
March 29, 2013
Publication date:
October 2, 2014
Applicant:
UPO LLC
Inventors:
William M. Hartman, Xin X. Zhu, William Yanez, Lisa M. Lane