Patents by Inventor Sung H. Han

Sung H. Han 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).

  • Processes for the carbonylation of methanol to form acetic acid, methyl acetate and acetic anhydride
    Patent number: 5488143
    Abstract: The present invention provides an improved process for selectively producing acetic acid and/or methyl acetate by the gas phase carbonylation of methanol with carbon monoxide; an improved process for producing acetic anhydride directly from the methyl acetate; and a novel method for sustaining the life time of a carbonylation or a hydroformylation catalyst by pretreating the carbon monoxide or the synthesis gas to be used in carrying out the gas phase carbonylation or the hydroformylation.
    Type: Grant
    Filed: January 19, 1994
    Date of Patent: January 30, 1996
    Assignee: Korea Institute of Science and Technology
    Inventors: Sung J. Uhm, Sung H. Han, Jun W. Oh, Oh S. Joo
  • Highly active catalyst for the polymerization of olefins and method for the preparation of the same
    Patent number: 5459116
    Abstract: Highly active catalyst for the polymerization of olefins and method for the preparation of the same.The catalyst for the polymerization of olefins, consisting essentially of-magnesium, titanium, halogen and at least one electron donor, wherein the electron donor is selected from the group consisting of aliphatic unsaturated esters, aliphatic saturated esters, aromatic esters and the mixture thereof, which all contain at least one hydroxy group.The catalyst is prepared by directly reacting a magnesium compound of liquid phase having no reducing power with a titanium compound of liquid phase in the presence with at least one electron donor.Superior in activity as well as production yield in polymerizing olefins, the catalyst is capable of not only providing the polymer with high stereoregularity but also improving the bulk density of the polymer, especially polyethylene.
    Type: Grant
    Filed: April 28, 1994
    Date of Patent: October 17, 1995
    Assignee: Samsung General Chemicals Co., Ltd.
    Inventors: Ki S. Ro, Min C. Chung, Tu W. Chang, Sung H. Han
  • Process for the preparation of acetic esters from methanol
    Patent number: 5430178
    Abstract: Acetic ester is produced economically by a gas phase carbonylation of methanol with carbon monoxide followed by a transesterification. Specifically, the inventive process comprises (a) carbonylating methanol in a gas phase with carbon monoxide to produce a mixture of acetic acid and methyl acetate; (b) separating from the production mixture the acetic acid, and a mixture of the methyl acetate and the co-catalyst; (c) further separating said methyl acetate and the co-catalyst and recycling the separated co-catalyst to the carbonylation reactor; (d) introducing the separated methyl acetate into a lower region of a transesterification reactor at a temperature of above its boiling point; (e) introducing an C.sub.
    Type: Grant
    Filed: July 27, 1994
    Date of Patent: July 4, 1995
    Assignee: Korea Institute of Science and Technology
    Inventors: Sung J. Uhm, Sung H. Han, Jun W. Oh, Oh S. Joo, Kwang D. Jung, Moon S. Lee
  • Process for the preparation of ethanol from methanol
    Patent number: 5414161
    Abstract: Ethanol is produced economically by a gas phase carbonylation of methanol with carbon monoxide followed by a hydrogenation.
    Type: Grant
    Filed: March 17, 1994
    Date of Patent: May 9, 1995
    Assignee: Korea Institute of Science and Technology
    Inventors: Sung J. Uhm, Sung H. Han, Jun W. Oh, Oh S. Joo, Kwang D. Jung, Jung Y. Beak