Patents Assigned to Mobil Oil Coporation
  • Cofeeds of electron donating and electron withdrawing reagents to control MW in olefin polymerization using supported metallocene catalyst
    Patent number: 5883203
    Abstract: In gas phase polymerizations and copolymerizations of ethylene, reagents or cofeeds control the molecular weight, expressed as MI (wherein MI is measured according to ASTM D-1238 Condition E), of the resin product. Use of isopentane and electron donating compounds decrease MI; whereas, electron withdrawing compounds increase MI.
    Type: Grant
    Filed: October 10, 1997
    Date of Patent: March 16, 1999
    Assignee: Mobil Oil Coporation
    Inventors: Subrahmanyam Cheruvu, Frederick Y. Lo, Shih-May Christine Ong
  • Water washing to remove salts
    Patent number: 5656152
    Abstract: A continuous water washing process for removing salts from refinery process streams is disclosed. The salt and salt precursor content of a process stream is determined, and iterative calculations made to ensure an aqueous phase forms downstream of the water injection point with a salt and ion concentration within acceptable limits. Preferably chemical speciation calculations are used to check for corrosive, transient aqueous phases intermediate the point of water injection and the process outlet.
    Type: Grant
    Filed: December 5, 1994
    Date of Patent: August 12, 1997
    Assignee: Mobil Oil Coporation
    Inventors: Bruce D. McLaughlin, Yiing-Mei Wu