Patents by Inventor Chwu-Ching Jan

Chwu-Ching Jan 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).

  • Patent number: 5773549
    Abstract: The invention provides a process for hydrotreating an organic feedstock containing a halogenated component and contaminated with distillable oxygen compounds, and/or distillable nitrogen compounds having boiling points lower than the halogenated compounds by means of removing the distillable oxygen compounds and distillable nitrogen compounds with a fractionation zone and then contacting the resulting organic feedstock having a reduced concentration of distillable oxygen and nitrogen compounds and a gaseous recycle stream containing hydrogen with a hydrogenation catalyst in a hydrogenation reaction zone to produce an anhydrous liquid stream comprising hydrogenated hydrocarbonaceous compounds having a reduced concentration of organic halide and a hydrogen halide compound. The resulting effluent from the hydrogenation zone is optionally separated to produce a hydrogenated hydrocarbonaceous stream having a reduced level of halogen and an anhydrous stream comprising a hydrogen halide compound.
    Type: Grant
    Filed: March 24, 1997
    Date of Patent: June 30, 1998
    Assignee: UOP LLC
    Inventors: Mark D. Moser, Tom N. Kalnes, Chwu-Ching Jan
  • Patent number: 5744669
    Abstract: A process for the conversion of a halogenated organic stream containing trace quantities of organic nitrates to produce a stream comprising hydrogenated hydrocarbonaceous compounds free from organic nitrates and halogenated organic compounds by means of contacting the feed stream and hydrogen with a selective hydrogenation catalyst in a first hydrogenation zone at hydrogenation conditions to convert the organic nitrates into water-soluble nitrogen compounds while effectively minimizing the production of hydrogen halide compounds. The resulting effluent from the first hydrogenation zone is contacted with an aqueous scrubbing solution to recover at least a portion of the water-soluble nitrogen compounds in order to produce a stream containing halogenated organic compounds and essentially free of nitrogen compounds which is then introduced into a second hydrogenation zone operated at selected hydrogenation conditions to produce water-soluble hydrogen halide compounds and hydrogenated hydrocarbonaceous compounds.
    Type: Grant
    Filed: January 30, 1997
    Date of Patent: April 28, 1998
    Assignee: UOP
    Inventors: Tom N. Kalnes, George R. Hibel, Chwu-Ching Jan
  • Patent number: 5600041
    Abstract: A process for treating a stream containing halogenated organic compounds and having trace quantities of organic nitrates to produce a stream comprising halogenated organic compounds free from organic nitrates by the utilization of a hydrogenation zone operated at selective hydrogenation conditions in order to convert the organic nitrates to water-soluble nitrogen compounds while minimizing the production of hydrogen halide compounds. The resulting water-soluble nitrogen compounds are removed by extraction with an aqueous stream.
    Type: Grant
    Filed: February 13, 1995
    Date of Patent: February 4, 1997
    Assignee: UOP
    Inventors: Chwu-Ching Jan, Tom N. Kalnes, George R. Hibel
  • Patent number: 5354931
    Abstract: The invention provides a process for hydrotreating an organic feedstock containing oxygen compounds and a halogen component by means of removing the oxygen compounds with an adsorbent and then contacting the resulting organic feedstock having a reduced concentration of oxygen compounds and a gaseous recycle stream containing hydrogen with a hydrogenation catalyst in a hydrogenation reaction zone to produce an anhydrous liquid stream comprising hydrogenated hydrocarbonaceous compounds having a reduced concentration of halogen and a hydrogen halide compound. The resulting effluent from the hydrogenation zone is optionally separated to produce a hydrogenated hydrocarbonaceous stream having a reduced level of halogen and an anhydrous stream comprising a hydrogen halide compound.
    Type: Grant
    Filed: March 10, 1993
    Date of Patent: October 11, 1994
    Assignee: UOP
    Inventors: Chwu-Ching Jan, Mark D. Moser, Tom N. Kalnes, George R. Hibel
  • Patent number: 5314614
    Abstract: The invention provides a process for hydrotreating an organic feedstock containing thermally unstable compounds and a halogen component by means of contacting the organic feedstock and a gaseous recycle stream containing hydrogen and a hydrogen halide compound with a hydrogenation catalyst in a hydrogenation reaction zone to produce a hydrogenated hydrocarbonaceous stream having a reduced concentration of halogen and a halide compound stream. The resulting effluent from the hydrogenation zone is separated to produce a recycle stream containing a hydrogen halide compound.
    Type: Grant
    Filed: June 17, 1992
    Date of Patent: May 24, 1994
    Assignee: UOP
    Inventors: Mark D. Moser, Tom N. Kalnes, Chwu-Ching Jan, George R. Hibel
  • Patent number: 5196603
    Abstract: This invention relates to a process for removing impurities contained in a teritary butyl alcohol feedstock. The process involves contacting the feedstock with an iron (II) compound such as iron (II) chloride, under an inert atmosphere at elevated pressures and temperatures for a time sufficient to reduce the peroxides to alcohols and oxidize the iron (II) to iron (III). The iron (II) compound is added in a homogeneous phase which, after reaction has occurred, gives a mixture of the treated teritary butyl alcohol, iron (III) compound and any residual iron (II) compound. The iron (III) and any iron (II) compounds are separated from the product by contacting the mixture with a cation exchange column.
    Type: Grant
    Filed: January 30, 1992
    Date of Patent: March 23, 1993
    Assignee: UOP
    Inventors: Chwu-Ching Jan, Thomas P. Malloy
  • Patent number: 5124492
    Abstract: This invention relates to a process for removing peroxide impurities contained in a tertiary butyl alcohol feedstock. The process involves contacting the feedstock with an iron (II) compound such as iron (II) chloride, under an inert atmosphere at elevated pressures and temperatures for a time sufficient to reduce the peroxides to alcohols and oxidize the iron (II) to iron (III). The iron (II) compound may be added in a homogeneous phase or it may be deposited on a support. When the iron (II) is added as a homogeneous phase, it is separated from the product by contacting the mixture with a cation exchange column. Finally, when a supported iron (II) compound is used, the process may be run in a batch or continuous mode.
    Type: Grant
    Filed: February 12, 1991
    Date of Patent: June 23, 1992
    Assignee: UOP
    Inventors: Chwu-Ching Jan, Thomas P. Malloy