Patents by Inventor Richard K. Hoehn

Richard K. Hoehn has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • PROCESS FOR RECOVERING HYDROCRACKED EFFLUENT
    Publication number: 20190085252
    Abstract: We have discovered a process for hydrocracking a distillate stream and separating it into several product cuts including LPG, light naphtha, heavy naphtha and distillate without a stripper column. Additionally, no more than two heaters relying on external utilities are required for reboiling fractionator bottoms.
    Type: Application
    Filed: September 20, 2017
    Publication date: March 21, 2019
    Inventors: Donald A. Eizenga, Massimo Sangalli, Richard K. Hoehn, Saadet Ulas Acikgoz, Trung Pham
  • PROCESS AND APPARATUS FOR RECOVERING HYDROGEN FROM RESIDUE HYDROPROCESSING
    Publication number: 20190031965
    Abstract: A membrane unit is able to recover hydrogen from a resid waste gas stream. Two membrane units provide even greater hydrogen recovery. The membrane separation is performed at conditions that allow the pressure of the recovered hydrogen to enter into a second stage of compression, saving the expense of the first stage of compression.
    Type: Application
    Filed: July 31, 2017
    Publication date: January 31, 2019
    Inventors: Richard K. Hoehn, Eleftherios Adamopoulos
  • PROCESS FOR RECOVERING HYDROPROCESSED EFFLUENT WITH IMPROVED HYDROGEN RECOVERY
    Publication number: 20180371336
    Abstract: A process is disclosed for reducing loss of hydrogen in solution to the fractionation section of a hydroprocessing unit. The hot flash overhead vapor bypasses the cold flash drum and may be treated with the cold flash vapor stream from the cold flash drum to recover hydrogen. Substantial conservation of hydrogen gas is achieved.
    Type: Application
    Filed: June 22, 2017
    Publication date: December 27, 2018
    Inventors: Richard K. Hoehn, Bettina M. Patena
  • Two stage hydrocracking process and apparatus
    Patent number: 10144884
    Abstract: An apparatus and process is disclosed for hydrocracking a hydrocarbon feed in a hydrocracking reactor and hydrocracking a liquid first hydrocracked stream and a recycle oil stream in a second hydrocracking reactor. A vapor first hydrocracked stream and the second hydrocracked stream are fractionated to provide the recycle oil stream.
    Type: Grant
    Filed: May 2, 2016
    Date of Patent: December 4, 2018
    Assignee: UOP LLC
    Inventor: Richard K. Hoehn
  • HYDROCRACKING PROCESS AND APPARATUS WITH HEAVY POLYNUCLEAR AROMATICS REMOVAL FROM A REBOILED COLUMN
    Publication number: 20180282642
    Abstract: A process and apparatus removes HPNA's from a fractionated bottoms stream from a reboiled product fractionation column that obtains heat from a reboiler. HPNA's are removed from the fractionated bottoms stream by stripping it with an inert gas. The HPNA lean stream may be fed back to the reboiled product fractionation column at the same elevation as the feed stream to the column.
    Type: Application
    Filed: March 31, 2017
    Publication date: October 4, 2018
    Inventors: Richard K. Hoehn, Donald A. Eizenga
  • Process and apparatus for hydrotreating fractionated overhead naphtha
    Patent number: 10066174
    Abstract: An apparatus and process for hydrodesulfurizing hydroprocessed naphtha from an overhead stream of a product fractionation column and/or from an overhead stream of a product stripping column in which an overhead stream may be condensed and fed to a post treat hydrodesulfurization reactor. Hydrogen may be supplied from an upstream separator for separating the hydroprocessed stream. Accordingly, naphtha may be hydrodesulfurized within the hydroprocessing recovery unit.
    Type: Grant
    Filed: March 14, 2017
    Date of Patent: September 4, 2018
    Assignee: UOP LLC
    Inventors: Kiran Ladkat, Richard K. Hoehn, Neeraj Tiwari
  • Process and apparatus for hydrotreating stripped overhead naphtha
    Patent number: 10066175
    Abstract: An apparatus and process for hydrodesulfurizing hydroprocessed naphtha from an overhead stream of a product fractionation column and/or from an overhead stream of a product stripping column in which an overhead stream may be condensed and fed to a post treat hydrodesulfurization reactor. Hydrogen may be supplied from an upstream separator for separating the hydroprocessed stream. Accordingly, naphtha may be hydrodesulfurized within the hydroprocessing recovery unit.
    Type: Grant
    Filed: March 14, 2017
    Date of Patent: September 4, 2018
    Assignee: UOP LLC
    Inventors: Kiran Ladkat, Richard K. Hoehn, Neeraj Tiwari
  • STAGED HYDROTREATING AND HYDROCRACKING PROCESS AND APPARATUS
    Publication number: 20180223198
    Abstract: An apparatus and process is disclosed for hydrocracking a hydrocarbon feed stream following hydrotreating the feed stream. A separator removes diesel and lower boiling materials in a hydrotreated stream before a hydrocracking reactor, so only liquid materials heavier than diesel are hydrocracked in a hydrocracking reactor. A vapor hydrotreated stream and the hydrocracked stream are separated and fractionated together.
    Type: Application
    Filed: February 3, 2017
    Publication date: August 9, 2018
    Inventors: Gabriela M. Gonzalez Lippke, Simerjeet Singh, Richard K. Hoehn
  • Process and apparatus for hydroprocessing with two product fractionators
    Patent number: 10041008
    Abstract: A process and apparatus are disclosed for recovering hydroprocessing effluent from a hydroprocessing unit utilizing a hot stripping column and a cold stripping column. A light fractionation column fractionates naphtha from kerosene predominantly from a cold stripped stream. A heavy fractionation column fractionates diesel from unconverted oil predominantly present in a hot stripped stream. Only the hot hydroprocessing effluent is heated in a fired heater prior to entering the heavy fractionation column, resulting in substantial operating and capital savings.
    Type: Grant
    Filed: February 26, 2014
    Date of Patent: August 7, 2018
    Assignee: UOP LLC
    Inventors: Kiran Ladkat, Richard K. Hoehn, Hemant Mahajan
  • Hydrocracking process and apparatus with HPNA removal
    Patent number: 10011786
    Abstract: One exemplary embodiment can be a process for treating a hydrocracking fraction. The process can include obtaining a bottom stream from a fractionation column, stripping HPNAs from the bottoms stream and adsorbing HPNAs from the stripped stream to provide an adsorbed stream that can meet a desired HPNA concentration specification. The adsorption step can be adjusted to achieve an adjusted HPNA concentration.
    Type: Grant
    Filed: February 28, 2017
    Date of Patent: July 3, 2018
    Assignee: UOP LLC
    Inventors: Donald A. Eizenga, Richard K. Hoehn, Michael J. Pedersen
  • PROCESSES FOR STRIPPING CONTAMINANTS FROM MULTIPLE EFFLUENT STREAMS
    Publication number: 20180119023
    Abstract: Processes for combining the stripping sections for two different reaction zones, such as a diesel hydrotreating zone and a naphtha hydrotreating zone. The stripping section includes an air cooler, a combined overhead receiver and two different separation sections. The two separation sections may be in the same column, but be fluidically separated. Alternatively the two sections may be in different columns. A stream from the second section may be used as a reflux from the first. While a stream from the combined overhead condenser may provide a reflux for the first section.
    Type: Application
    Filed: August 24, 2017
    Publication date: May 3, 2018
    Inventors: Donald A. Eizenga, Xin X. Zhu, Richard K. Hoehn, Paul C. Steacy
  • Hydrotreating process and apparatus relating thereto
    Patent number: 9914889
    Abstract: One exemplary embodiment can be a process for treating a hydroprocessing fraction. The process can include obtaining a bottom stream from a fractionation zone, and passing at least a portion of the bottom stream to a film generating evaporator zone for separating a first stream containing less heavy polynuclear aromatic compounds than a second stream.
    Type: Grant
    Filed: March 15, 2017
    Date of Patent: March 13, 2018
    Assignee: UOP LLC
    Inventors: Richard K. Hoehn, Soumendra Mohan Banerjee, David M. Bowman, Xin X. Zhu
  • PROCESS AND APPARATUS FOR HYDROCRACKING A HYDROCARBON STREAM IN TWO STAGES WITH AROMATIC SATURATION
    Publication number: 20170362516
    Abstract: A process and apparatus for two stage hydrocracking saturates aromatics from the first stage hydrocracking unit to prevent production of HPNA's. The saturated HPNA's can be hydrocracked in the second stage to minimize or eliminate purged unconverted oil to approach or obtain maximum conversion. In an aspect, the second stage hydrocracking reactor and hydrotreating reactor may be located in the same vessel.
    Type: Application
    Filed: May 18, 2017
    Publication date: December 21, 2017
    Inventors: Haiyan Wang, Richard K. Hoehn, Xin X. Zhu
  • Process and apparatus for recovering hydrotreated hydrocarbons with two strippers
    Patent number: 9809763
    Abstract: A process and apparatus is disclosed for recovering hydrotreating effluent from a hydrotreating unit utilizing a hot stripper and a cold stripper. Only the hot hydrotreating effluent is heated in a fired heater prior to product fractionation, resulting in substantial operating and capital savings. The cold stripped stream from the cold stripper bottoms line may be passed directly to a diesel pool when VGO is hydrotreated in the hydrotreating reactor bypassing the product fractionation column.
    Type: Grant
    Filed: June 1, 2015
    Date of Patent: November 7, 2017
    Assignee: UOP LLC
    Inventors: Kiran Ladkat, Richard K. Hoehn, Hemant Mahajan
  • PROCESS AND APPARATUS FOR HYDROTREATING STRIPPED OVERHEAD NAPHTHA
    Publication number: 20170275541
    Abstract: An apparatus and process for hydrodesulfurizing hydroprocessed naphtha from an overhead stream of a product fractionation column and/or from an overhead stream of a product stripping column in which an overhead stream may be condensed and fed to a post treat hydrodesulfurization reactor. Hydrogen may be supplied from an upstream separator for separating the hydroprocessed stream. Accordingly, naphtha may be hydrodesulfurized within the hydroprocessing recovery unit.
    Type: Application
    Filed: March 14, 2017
    Publication date: September 28, 2017
    Inventors: Kiran Ladkat, Richard K. Hoehn, Neeraj Tiwari
  • PROCESS AND APPARATUS FOR HYDROTREATING FRACTIONATED OVERHEAD NAPHTHA
    Publication number: 20170275540
    Abstract: An apparatus and process for hydrodesulfurizing hydroprocessed naphtha from an overhead stream of a product fractionation column and/or from an overhead stream of a product stripping column in which an overhead stream may be condensed and fed to a post treat hydrodesulfurization reactor. Hydrogen may be supplied from an upstream separator for separating the hydroprocessed stream. Accordingly, naphtha may be hydrodesulfurized within the hydroprocessing recovery unit.
    Type: Application
    Filed: March 14, 2017
    Publication date: September 28, 2017
    Inventors: Kiran Ladkat, Richard K. Hoehn, Neeraj Tiwari
  • Hydrotreating process and apparatus relating thereto
    Patent number: 9701912
    Abstract: One exemplary embodiment can be a process for treating a hydroprocessing fraction. The process can include obtaining a bottom stream from a fractionation zone, and passing at least a portion of the bottom stream to a film generating evaporator zone for separating a first stream containing less heavy polynuclear aromatic compounds than a second stream.
    Type: Grant
    Filed: October 24, 2014
    Date of Patent: July 11, 2017
    Assignee: UOP LLC
    Inventors: Richard K. Hoehn, Soumendra Mohan Banerjee, David M. Bowman, Xin X. Zhu
  • HYDROTREATING PROCESS AND APPARATUS RELATING THERETO
    Publication number: 20170183582
    Abstract: One exemplary embodiment can be a process for treating a hydroprocessing fraction. The process can include obtaining a bottom stream from a fractionation zone, and passing at least a portion of the bottom stream to a film generating evaporator zone for separating a first stream containing less heavy polynuclear aromatic compounds than a second stream.
    Type: Application
    Filed: March 15, 2017
    Publication date: June 29, 2017
    Inventors: Richard K. Hoehn, Soumendra Mohan Banerjee, David M. Bowman, Xin X. Zhu
  • PROCESS AND APPARATUS FOR RECOVERING HYDROGEN FROM HYDROPROCESSED HOT FLASH LIQUID
    Publication number: 20170183581
    Abstract: A medium separator is used to recover a gaseous stream from a hydroprocessed liquid stream for hydrogen recovery in a hydrogen recovery unit. A medium flash drum may further remove liquid components from the gaseous stream prior to hydrogen recovery in the hydrogen recovery unit.
    Type: Application
    Filed: December 27, 2016
    Publication date: June 29, 2017
    Inventors: Kiran Ladkat, Richard K. Hoehn, Hemant Mahajan, Rajaraman Panchapakesan
  • Process for recovering hydroprocessed hydrocarbons with two strippers in one vessel
    Patent number: 9670424
    Abstract: A process is disclosed for recovering hydroprocessing effluent from a hydroprocessing unit utilizing a hot stripper and a cold stripper. The cold stripper and the hot stripper are contained in the same vessel. A barrier prevents material from the hot stripper from entering into the cold stripper.
    Type: Grant
    Filed: August 19, 2011
    Date of Patent: June 6, 2017
    Assignee: UOP LLC
    Inventors: Richard K. Hoehn, David M. Bowman, Xin X. Zhu