Patents by Inventor Rafael Alcala

Rafael Alcala 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 hydrotreating a feed stream comprising a biorenewable feedstock with treatment of an off-gas stream
    Patent number: 11952541
    Abstract: A process for hydrotreating a feed stream comprising a biorenewable feedstock is disclosed. The process comprises hydrotreating the feed stream in the presence of a hydrotreating hydrogen stream and a hydrotreating catalyst to provide a hydrotreated stream. The hydrotreated stream is separated into a hydrotreated liquid stream and a hydrotreated gas stream. The hydrotreated liquid stream is subjected to stripping to provide a stripper off-gas stream. At least a portion of the stripper off-gas stream is contacted with a caustic stream to provide a sulfur-lean gas stream and a sulfur-rich caustic stream. The sulfur-rich caustic stream is further treated to provide a treated gas stream.
    Type: Grant
    Filed: October 12, 2021
    Date of Patent: April 9, 2024
    Assignee: UOP LLC
    Inventors: Donald Eizenga, James T. Wexler, Rafael Alcala, Xin X. Zhu, Jan De Ren, Saravanaperumal Sivaprakasam
  • PROCESS FOR HYDROTREATING A FEED STREAM COMPRISING A BIORENEWABLE FEEDSTOCK WITH TREATMENT OF AN OFF-GAS STREAM
    Publication number: 20230110965
    Abstract: A process for hydrotreating a feed stream comprising a biorenewable feedstock is disclosed. The process comprises hydrotreating the feed stream in the presence of a hydrotreating hydrogen stream and a hydrotreating catalyst to provide a hydrotreated stream. The hydrotreated stream is separated into a hydrotreated liquid stream and a hydrotreated gas stream. The hydrotreated liquid stream is subjected to stripping to provide a stripper off-gas stream. At least a portion of the stripper off-gas stream is contacted with a caustic stream to provide a sulfur-lean gas stream and a sulfur-rich caustic stream. The sulfur-rich caustic stream is further treated to provide a treated gas stream.
    Type: Application
    Filed: October 12, 2021
    Publication date: April 13, 2023
    Inventors: Donald Eizenga, James T. Wexler, Rafael Alcala, Xin X. Zhu, Jan De Ren, Saravanaperumal Sivaprakasam
  • PROCESS FOR PRODUCING DIESEL FUEL FROM A BIORENEWABLE FEED WITH RECYCLED SULFUR
    Publication number: 20220112430
    Abstract: The process produces a diesel stream from a biorenewable feedstock by hydrotreating to remove heteroatoms and saturate olefins. The recycle gas is recycled to the hydrotreating reactor without removing hydrogen sulfide, which is needed in the biorenewable feed to keep the hydrotreating catalyst active. A purification unit can be utilized on a purge gas stream to purify the gas and improve hydrogen concentration in the recycle gas when added to the recycle gas.
    Type: Application
    Filed: September 2, 2021
    Publication date: April 14, 2022
    Inventors: David A. Wegerer, James T. Wexler, Xin X. Zhu, Donald Eizenga, Rafael Alcala, Ashish Mathur, Gautam Pandey, Hari S. Bajpai