Patents Represented by Attorney Larry William Evans

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  • Energy efficient recovery of acrylonitrile
    Patent number: 4238295
    Abstract: Substantial operating cost savings are realized in the recovery of acrylonitrile from an aqueous solution containing acrylonitrile by using the recovery column bottoms stream to provide heat to one or more distillation columns in the process.
    Type: Grant
    Filed: December 4, 1978
    Date of Patent: December 9, 1980
    Assignee: Standard Oil Company
    Inventor: Paul S. Odom
  • Amphora aggregates and the process for their preparation
    Patent number: 4170569
    Abstract: Improved amphora aggregates having a substantially spherical shape, a void center and two cavities 180.degree. apart in the external surface communicating to the void center are useful in diffusion-limited reactions and/or reactions in which heat transfer is critical. Especially preferred is use of the amphora aggregates in the hydrotreating of light hydrocarbon fractions, catalytic reforming, and fixed-bed alkylation processes.
    Type: Grant
    Filed: June 7, 1978
    Date of Patent: October 9, 1979
    Assignee: Standard Oil Company
    Inventors: Daniel R. Herrington, Albert P. Schwerko
  • Preparation of acrylic or methacrylic acid from acrolein or methacrolein
    Patent number: 4113768
    Abstract: Methacrylic acid or acrylic acid are produced by the oxidation of methacrolein or acrolein, respectively, with molecular oxygen in the vapor phase in the presence of a catalytic oxide of molybdenum, phosphorus, bismuth, copper, oxygen, optionally a halogen selected from the group consisting of chlorine, bromine or iodine, and optionally, at least one element selected from the group consisting of Fe, Cr, Ni, Mn, Sb, Te, Rh, and Pd.
    Type: Grant
    Filed: December 6, 1976
    Date of Patent: September 12, 1978