Accumulator Patents (Class 159/DIG18)
  • Patent number: 4640743
    Abstract: A process for the multi-stage condensation of an overhead fraction is disclosed. The process facilitates optimal response to changes in distillation column controls wherein column top reflux condensation is preferentially returned to said distillation column, but auxiliary surge capacity is obtained by connection to a first accumulator section of an accumulating zone, which surge capacity is supplemented by one-way flow of liquid from a cooler, second section in said accumulation zone.
    Type: Grant
    Filed: April 24, 1985
    Date of Patent: February 3, 1987
    Assignee: Shell Oil Company
    Inventors: Robert P. Bannon, Stanley Marple
  • Patent number: 4589957
    Abstract: Improved process for the separation of a hydrocarbon-containing feedstream comprising monomer, comonomer and diluent into separate product streams which comprises subjecting the feedstream to two-stage distillation provided with a common accumulation zone wherein the condensate from the accumulation zone serves as the source of feed for the second distillation and reflux for the first distillation. In a specific embodiment, a feed comprising ethylene, 1-hexene, and isobutane is separated into separate streams of 1-hexene, ethylene and isobutane, and isobutane for recycle to polymerization.
    Type: Grant
    Filed: August 25, 1983
    Date of Patent: May 20, 1986
    Assignee: Phillips Petroleum Company
    Inventors: Fred T. Sherk, Donald O. Hanson