×

Amine and membrane separation treament of liquid hydrocarbon media

  • US 20080194885A1
  • Filed: 06/25/2007
  • Published: 08/14/2008
  • Est. Priority Date: 08/30/2005
  • Status: Abandoned Application
First Claim
Patent Images

1. A method for separating ethylene glycols from at least one carbonyl species impurity selected from the group consisting of carbon dioxide, carbonic acid, aldehydes and esters, said glycols and said impurity being dissolved or dispersed in a liquid medium containing said impurity and said ethylene glycols, said method comprising adding to said medium 0.1-100 moles per mole of said carbonyl species impurity of a secondary or tertiary amine having a boiling point of about 200°

  • C. or greater to react with said impurity to form a reaction product in a treated medium, further comprising contacting said treated medium with a surface of a semi-permeable separatory membrane that exhibits selective permeation of said medium over that of said impurity and separating said treated medium into a permeate stream containing said liquid medium and an impermeate stream including said reaction product, said membrane adapted to pass as permeate molecules having a molecular weight of 300 Daltons or less.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×