Patents by Inventor Hsiang-Ning Sun

Hsiang-Ning Sun 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).

  • Skeletal isomerization of olefins over halogen-containing alkaline earth oxide catalysts
    Patent number: 4778943
    Abstract: A process for the skeletal isomerization of olefins wherein the olefins are contacted with a catalyst comprising at least one alkaline earth oxide which has been treated with a halogen compound.
    Type: Grant
    Filed: October 24, 1985
    Date of Patent: October 18, 1988
    Assignee: Atlantic Richfield Company
    Inventor: Hsiang-ning Sun
  • Process for preparing polycarbonate copolymer foam suitable for lost foam casting
    Patent number: 4773466
    Abstract: The evaporative casting of molten metals has been shown to produce castings having smooth surfaces without any sign of carbon deposits thereon by using a copolymer polycarbonate prepared from cyclohexene oxide, cyclopentene oxide, cycloheptene oxide, or isobutylene oxide and carbon dioxide.
    Type: Grant
    Filed: December 14, 1987
    Date of Patent: September 27, 1988
    Assignee: ARCO Chemical Company
    Inventors: Michael J. Cannarsa, Haven S. Kesling, Jr., Hsiang-Ning Sun
  • Process for preparing polycarbonate terpolymer foam suitable for lost foam casting
    Patent number: 4763715
    Abstract: The evaporative casting of molten metals has been shown to produce castings having smooth surfaces without any sign of carbon deposits thereon by using a terpolymer polycarbonate prepared from cyclopentene oxide or cyclohexene oxide, ethylene oxide, propylene oxide, or butylene oxide, and carbon dioxide in making patterns for the lost foam casting process.
    Type: Grant
    Filed: December 14, 1987
    Date of Patent: August 16, 1988
    Assignee: Arco Chemical Company
    Inventors: Michael J. Cannarsa, Haven S. Kesling, Jr., Hsiang-Ning Sun
  • Skeletal isomerization of olefins over bromided aluminas
    Patent number: 4654463
    Abstract: A process for the skeletal isomerization of olefins wherein the olefins are contacted with a bromided alumina catalyst prepared by contacting alumina with a vapor selected from the group consisting of HBr, organic bromides, and Br.sub.2 /hydrocarbon mixtures.
    Type: Grant
    Filed: October 24, 1985
    Date of Patent: March 31, 1987
    Assignee: Atlantic Richfield Company
    Inventors: Hsiang-ning Sun, Robert G. Gastinger
  • Method for producing a vanadium-titanium-tin catalyst exhibiting improved intrinsic surface area
    Patent number: 4448898
    Abstract: Mixed vanadium-titanium-tin oxides catalysts having intrinsic surface areas before surface modification, greater than about 40 m.sup.2 /gram are disclosed. These catalysts are suitable for use in the preparation of acetic acid by gas-phase oxidation of butenes.
    Type: Grant
    Filed: June 7, 1982
    Date of Patent: May 15, 1984
    Assignee: Altantic Richfield Company
    Inventor: Hsiang-Ning Sun
  • Two step process for the preparation of zeolite A by hydrothermal treatment of clinoptilolite
    Patent number: 4401634
    Abstract: A two step hydrothermal process for the preparation of zeolite A from clinoptilolite by (1) heat treating a mixture of clinoptilolite in an aqueous solution of sodium hydroxide and filtering the mixture followed by (2) reacting the filtrate with at least 75 percent of a stoichiometric amount of sodium aluminate to form and precipitate zeolite A from solution and recovering zeolite A.
    Type: Grant
    Filed: January 28, 1982
    Date of Patent: August 30, 1983
    Assignee: Atlantic Richfield Company
    Inventor: Hsiang-ning Sun
  • Two step process for the preparation of zeolite A by hydrothermal treatment of heulandite
    Patent number: 4401633
    Abstract: A two step hydrothermal process for the preparation of a sodium cation form of zeolite A from heulandite by (1) heat treating a mixture of heulandite in an aqueous solution of sodium hydroxide and filtering the mixture followed by (2) reacting the filtrate with at least 75 percent of a stoichiometric amount of sodium aluminate to form and precipitate zeolite A from solution and recovering zeolite A.
    Type: Grant
    Filed: January 28, 1982
    Date of Patent: August 30, 1983
    Assignee: Atlantic Richfield Company
    Inventor: Hsiang-ning Sun
  • Hydrogen peroxide production
    Patent number: 4393038
    Abstract: Hydrogen is diffused through a palladium-containing membrane into an aqueous solution containing ions of a stabilizing nature and containing dissolved oxygen to form hydrogen peroxide. Some water is formed as a by-product. The hydrogen peroxide may be identified and/or recovered from said aqueous solution in an identification zone.
    Type: Grant
    Filed: October 16, 1981
    Date of Patent: July 12, 1983
    Assignee: Atlantic Richfield Company
    Inventors: Hsiang-ning Sun, John J. Leonard, Harold Shalit