Patents by Inventor Sheldon Evans

Sheldon Evans 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).

  • Method for regenerating a weak base anion exchanger
    Patent number: 4230807
    Abstract: A method for regenerating a weak base anion exchanger which comprises passing a regenerating chemical in an upward direction through a granular resinous mass of an exchanger, thereupon displacing the chemical and rinsing the mass with water. The regenerating chemical is a lime slurry having a concentration of 1 to 5% by weight, which is both supplied to and withdrawn from the granular mass in an evenly distributed flow with a flow rate of at least 10 m.sup.3, per hour, per m.sup.3 resin material (m.sup.3 /h/m.sup.3), while the granular mass is in a compacted state.
    Type: Grant
    Filed: July 9, 1976
    Date of Patent: October 28, 1980
    Assignee: Hoogovens Ijmuiden, B.V.
    Inventor: Sheldon Evans
  • Operation of a two-phase reactor
    Patent number: 4193867
    Abstract: A regenerative base ion exchange process involving the step of passing a liquid upwardly through a bed of particulate solid base ion exchange resin in a chamber of a two-phase reactor to regenerate said resin, wherein the rate of liquid flow is such that the solid resin is compacted and held by the liquid as a compact bed against a barrier located above it and is prevented by the liquid from sinking.
    Type: Grant
    Filed: October 3, 1975
    Date of Patent: March 18, 1980
    Assignee: Hoogovens IJmuiden, B.V.
    Inventor: Sheldon Evans