Patents Assigned to Asland Inc.
  • Reclamation of ester-cured phenolic resin bonded foundry sands
    Patent number: 5567743
    Abstract: This invention relates to a process for reclaiming ester-cured phenolic resin bonded sand. The process comprises contacting attrition reclaimed sand with a compound which converts potassium compounds to a form having a melting point of least 550.degree. C., and then thermally treating the sand at a temperature below that which the resulting potassium compound fuses.
    Type: Grant
    Filed: May 12, 1995
    Date of Patent: October 22, 1996
    Assignee: Asland Inc.
    Inventors: Andrew D. Busby, Philip Vernon