Patents Assigned to Chevron Chemical Co. LLC
  • Patent number: 6143166
    Abstract: This process relates to reforming a full-boiling range hydrocarbon feed in two parallel stages while maximizing the catalyst life of the heavy cut reformer and/or reducing the complexity of the plant by preferentially sending the higher purity Aromax.RTM. hydrogen to the heavy cut reformer.
    Type: Grant
    Filed: August 16, 1999
    Date of Patent: November 7, 2000
    Assignee: Chevron Chemical Co. LLC
    Inventor: Gerald J. Nacamuli
  • Patent number: 5952536
    Abstract: A gas phase, aromatics transalkylation process that comprises contacting a stream containing aromatic hydrocarbons with a catalyst comprising a zeolite selected from the group consisting of SSZ-26, Al-SSZ-33, CIT-1, SSZ-35, and SSZ-44 in the presence of added hydrogen and in the gas phase, to produce transalkylated product. The aromatics stream comprises one or more aromatic hydrocarbons, one of the hydrocarbons having at least one alkyl group attached thereto, the alkyl group comprising a C1, C2, C3 or C4 hydrocarbyl group. A preferred aromatics transalkylation process comprises contacting toluene or benzene or a mixture thereof with a stream containing trimethylbenzene in the presence of added hydrogen. The catalyst preferably contains a mild hydrogenation metal, such as nickel or palladium.
    Type: Grant
    Filed: April 2, 1998
    Date of Patent: September 14, 1999
    Assignee: Chevron Chemical Co. LLC
    Inventors: Gerald J. Nacamuli, Roger F. Vogel, Stacey I. Zones