Patents by Inventor Robert Frank Dee

Robert Frank Dee 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).

  • Process for the purification of industrial waste water from a propylene oxide production process
    Patent number: 6712882
    Abstract: A process for treating waste water from an industrial process for producing propylene oxide, which process involves the steps of: (a) subjecting the waste water to a multi-effect evaporation treatment resulting in a vaporous top fraction and a liquid bottom fraction containing the non-volatile contaminants; and (b) condensing at least part of the vaporous top fraction into a liquid stream which is subject to a stripping treatment resulting in an overhead stream containing volatile waste organic material and purified water as the liquid bottom stream.
    Type: Grant
    Filed: April 26, 2002
    Date of Patent: March 30, 2004
    Assignee: Shell Oil Company
    Inventors: Johan Hendrik De Bie, Robert Frank Dee, Raymond Lawrence June, Marinus Van Zwienen
  • Process for the treatment of waste water
    Patent number: 6500310
    Abstract: A process for treating waste water streams containing at least hydrocarbons and salts to yield a clean water product, a concentrated brine product and a hydrocarbon-rich product, which process includes the steps of: (a) feeding the waste water feed into a first distillation column at a stage in the range of from 0.05 to 0.15 from the top, wherein n represents the total number of theoretical stages of the first distillation column and has a value in the range of from 20 to 40; (b) drawing off a vapor stream at a stage in the range of from 0.55 to 0.
    Type: Grant
    Filed: December 14, 2000
    Date of Patent: December 31, 2002
    Assignee: Shell Oil Company
    Inventors: Robert Frank Dee, Marinus Van Zwienen