Purification of diethylene glycol monoethyl ether

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 6034281
SERIAL NO

09198879

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

The present invention provides a method for purifying diethylene glycol monoethyl ether, which is commonly known as Carbitol.TM. or Ethyl Carbitol.TM.. The method according to the present invention includes combining n-heptanol as an azeotrope-forming agent to crude diethylene glycol monoethyl ether which contains ethylene glycol as an impurity to form a mixture, subjecting the mixture to distillation whereby an overhead product comprising an azeotrope of ethylene glycol and n-heptanol and a bottoms product are produced, and recovering purified diethylene glycol monoethyl ether from the bottoms product. By practicing the method of the present invention, the ethylene gylcol content of diethylene glycol monoethyl ether can be reduced from thousands of parts per million to less than about twenty-five parts per million such that the purified diethylene glycol monoethyl ether is suitable for use as a solvent in pharmaceutical manufacturing applications.

Loading the Abstract Image... loading....

First Claim

See full text

Family

Loading Family data... loading....

Patent Owner(s)

Patent OwnerAddress
NOVOLYTE PERFORMANCE MATERIALS LLC8001 EAST PLEASANT VALLEY ROAD CLEVELAND OH 44131

International Classification(s)

  • No Non-US Classification to display

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Clause, Christian C Slaughter, LA 1 1
Egedy, Charles R Baton Rouge, LA 2 7

Cited Art Landscape

Load Citation

Patent Citation Ranking

  • No Patent Citation Ranking to display

Forward Cite Landscape

Load Citation