Patents by Inventor Njal Vigesdal

Njal Vigesdal 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 cooling and separation of dry particulate matter from a hot gas
    Patent number: 4149859
    Abstract: A proces for separation of dry particulate matter, such as molten slag droplets and/or solid particles, from a hot gas is disclosed in which the gas is first cooled to a temperature in the range from 50.degree. to 500.degree. C. The greater part of the particulate matter is removed from the cooler gas by means of at least one cyclone separator. The gas is then scrubbed with water in a scrubber. Cooling of the hot gas to the lower temperature range is performed by injecting into the hot gas at least part of a purified product gas formed by the process and at least part of an aqueous suspension of particulate matter obtained during scrubbing.
    Type: Grant
    Filed: October 14, 1977
    Date of Patent: April 17, 1979
    Assignee: Shell Internationale Reserach Maatchappij B.V.
    Inventor: Njal Vigesdal