Robert M Hoch

US Patent:

44379390, Mar 20, 1984

Filed:

Nov 16, 1981

Appl. No.:

6/321966

Inventors:

Vijay S. Bhise - Bloomfield NJ
Robert Hoch - Ridgewood NY

Assignee:

The Halcon SD Group, Inc. - New York NY

International Classification:

B01D 334
C07D30132

US Classification:

203 14

Abstract:

Ethylene oxide is extracted from aqueous solutions by carbon dioxide under (near) super-critical conditions and thereafter recovered by distillation at sub-critical conditions. Improved distillation is obtained by adding to the carbon dixoide a gas (or gases) which adjust the critical temperature of the gas mixture of the top of the distillation column within the range of about 32. degree. C. to about 75. degree. C. Preferred gases are the saturated hydrocarbons, particularly propane, n-butane, isobutane and pentane.

US Patent:

44379382, Mar 20, 1984

Filed:

Jul 17, 1981

Appl. No.:

6/284153

Inventors:

Vijay S. Bhise - Bloomfield NJ
Robert Hoch - Ridgewood NY

Assignee:

The Halcon SD Group, Inc. - New York NY

International Classification:

B01D 334
C07D30132

US Classification:

203 14

Abstract:

Ethylene oxide is recovered from aqueous solutions by extracting with carbon dioxide in the near-critical or super-critical state, thereby selectively removing the ethylene oxide from water, and thereafter recovering ethylene oxide from the carbon dioxide by distillation or other suitable means.