Stephen J Michaels

US Patent:

43260829, Apr 20, 1982

Filed:

Apr 7, 1980

Appl. No.:

6/137653

Inventors:

Patrick H. Martin - Danville CA
Stephen L. Michaels - Oakland CA

Assignee:

The Dow Chemical Company - Midland MI

International Classification:

C07C 8526

US Classification:

564497

Abstract:

Triethylamine and water are simultaneously removed from solutions in organic solvents, by liquid/liquid extraction with concentrated aqueous solutions of (C. sub. 2 H. sub. 5). sub. 3 N. H. sub. 3 PO. sub. 4 which preferably contain free phosphoric acid as well. Upon heating of the resulting extract, the water and amine taken up are boiled off and the extractant regenerated. The method is of particular value in the preparation of aqueous coating compositions comprising reaction products of polyether epoxides and H. sub. 3 PO. sub. 4 in organic media. The reaction product is salified with triethylamine in excess, in the presence of added water. The organic solvent is boiled off, together with the excess amine and some of the water, to form an aqueous dispersion of the salified product and a distillate which can be processed by the method of the invention. The recovered solvent, water and amine may be recycled.

US Patent:

46983031, Oct 6, 1987

Filed:

Mar 27, 1986

Appl. No.:

6/844819

Inventors:

Richard B. Bailey - Cupertino CA
Dilip K. Joshi - Kalamazoo MI
Stephen L. Michaels - Newton MA
Richard A. Wisdom - Foster City CA

Assignee:

Engenics, Inc. - Menlo Park CA

International Classification:

C12P 756
C07C 5908
A23C 2102

US Classification:

435139

Abstract:

The invention provides a method for producing lactic acid by continuous fermentation utilizing particular methods of media pretreatment, cell-recycle fermentation, fermentation broth acidification, and lactic acid separation.

US Patent:

47710012, Sep 13, 1988

Filed:

Sep 24, 1986

Appl. No.:

6/910949

Inventors:

Richard B. Bailey - Cupertino CA
Dilip K. Joshi - Kalamazoo MI
Stephen L. Michaels - Newton MA
Richard A. Wisdom - Foster City CA

Assignee:

Neurex Corp. - Menlo Park CA

International Classification:

C12P 756
C07C 5908
A23C 2102

US Classification:

435139

Abstract:

The disclosure describes a method for producing lactic acid from carbohydrate-containing media by continuous fermentation utilizing particular methods of media pretreatment, cell-recycle fermentation, fermentation broth acidification, and lactic acid separation.