Patents by Inventor Eugene P. Dai

Eugene P. Dai 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).

  • Synthesis of zeolites
    Patent number: 5354452
    Abstract: A novel zeolite characterized by a large number of secondary pores, a substantially decreased lattice constant, and a substantially decreased acid site density is attained by hydrothermal and acid-treating of an ultrastable Y-zeolite or a superultrastable Y-zeolite.
    Type: Grant
    Filed: October 19, 1992
    Date of Patent: October 11, 1994
    Assignee: Texaco Inc.
    Inventors: Eugene P. Dai, David E. Sherwood, Jr., Burton H. Bartley
  • Catalyst for control of emission of sulfur oxides
    Patent number: 4798819
    Abstract: A composition of matter, useful for removing sulfur oxides from gases, comprising a porous refractory support bearing as a first component (i) at least one component containing bismuth, chromium, or a rare earth, said first component being in the form of crystals of oxide of crystal size less than about 90 Angstrom units, and as second component at least one alkali metal--a typical composition containing 0.6 w % K and 4.8 w % Ce on alumina, the Ce being present as cystals of CeO.sub.2 of particle size of about 66 Angstrom units.
    Type: Grant
    Filed: March 28, 1986
    Date of Patent: January 17, 1989
    Assignee: Texaco Inc.
    Inventors: Paul H. Lewis, Eugene P. Dai, Edward H. Holst
  • Catalyst composition for catalytic cracking
    Patent number: 4668655
    Abstract: A catalyst composition for catalytic cracking contains a catalytic cracking catalyst and 1-10 weight %, of the total, of additive containing a porous refractory support bearing 0.5-10 weight % of at least one of bismuth, chromium or a rare earth metal and 0.4-10 weight % of an alkali metal.
    Type: Grant
    Filed: March 17, 1986
    Date of Patent: May 26, 1987
    Assignee: Texaco Inc.
    Inventors: Paul H. Lewis, Eugene P. Dai, Edward H. Holst
  • Control of SO.sub.x emission
    Patent number: 4626419
    Abstract: Sulfur oxides are removed from gases by contact with a composition containing potassium and cerium on alumina, the cerium being present in the form of crystals of oxide of crystal size below about 90 Angstrom Units.
    Type: Grant
    Filed: July 1, 1985
    Date of Patent: December 2, 1986
    Assignee: Texaco Inc.
    Inventors: Paul H. Lewis, Eugene P. Dai, Edward H. Holst
  • Control of SO.sub.x emission
    Patent number: 4606898
    Abstract: Sulfur oxides are removed from gases by contact with a composition containing 3 w % potassium and 3 w % cerium or alumina.
    Type: Grant
    Filed: July 8, 1985
    Date of Patent: August 19, 1986
    Assignee: Texaco Inc.
    Inventors: Paul H. Lewis, Eugene P. Dai, Edward H. Holst