Richard F Gregory

US Patent:

40147894, Mar 29, 1977

Filed:

May 2, 1973

Appl. No.:

5/356470

Inventors:

Walter R. Marshall - Bloomfield NJ
Richard A. Gregory - Belle Mead NJ
Richard H. Handwerk - South Somerville NJ

Assignee:

Union Carbide Corporation - New York NY

International Classification:

B01D 2126

US Classification:

210 84

Abstract:

Process is disclosed for effecting phase separation of relatively high and low viscosity immiscible liquids comprising maintaining, between inner means in relative rotational movement with outer sleeve means, at least one zone of increased pressure constriction and of decreased pressure constriction; feeding a multiphase mixture of relatively low viscosity and relatively high viscosity liquids to the interior of said sleeve means between said zones of increased and decreased pressure constriction; and withdrawing said high viscosity liquid and said low viscosity liquid from the vicinities of said zones of increased and decreased pressure constriction, respectively.

US Patent:

57050902, Jan 6, 1998

Filed:

Sep 6, 1996

Appl. No.:

8/708978

Inventors:

Paul Garland - Aylesbury, GB
Craig Norman Schubert - Belle Mead NJ
Richard Alan Gregory - Belle Mead NJ
Eduardo Garcia-Rameau - Houston TX
Rickey Epps - Houston TX
David Burns - The Woodlands TX
Robert Jerry Hlozek - The Woodlands TX

Assignee:

Union Carbide Chemicals & Plastics Technology Corporation - Danbury CT

International Classification:

C09K 300

US Classification:

252184

Abstract:

Absorption solvents for removing mercaptans from gas streams are disclosed. The absorption solvents comprise an alkylether of a polyalkylene glycol, e. g. , methoxytriglycol, and a secondary monoalkanolamine, e. g. , N-methylethanolamine, as well as optionally other amines, e. g. , methyldiethanolamine and diethanolamine. The absorption solvents do not require the presence of iodine for removal of mercaptans. Absorption processes utilizing the solvents are also disclosed.

US Patent:

59106115, Jun 8, 1999

Filed:

May 24, 1995

Appl. No.:

8/449254

Inventors:

Richard Alan Gregory - Belle Mead NJ
Martin Frank Cohen - Yorktown Heights NY

Assignee:

Union Carbide Chemicals & Plastics Technology Corporation - Danbury CT

International Classification:

C07C20984
C07C20986

US Classification:

564497

Abstract:

Method which includes passing a gas stream containing carbon dioxide, hydrogen sulfide, sulfur dioxide, mercaptans and other acid gases through an aqueous alkanolamine solution to remove the carbon dioxide, hydrogen sulfide, sulfur dioxide, mercaptans, etc. , from the gaseous stream. Heat-stable alkanolamine salts form in the aqueous alkanolamine solution due to the acid contaminants (other than hydrogen sulfide or carbon dioxide) removed from the gas stream. A base is added to the aqueous alkanolamine solution to convert all or part of the heat-stable alkanolamine salts into alkanolamine and simple salts. The base-treated aqueous alkanolamine solution is electrodialyzed in an electrodialysis cell containing ion exchange membranes. The purified aqueous alkanolamine solution can be used again to remove carbon dioxide, etc. , from the gas stream.

US Patent:

55891497, Dec 31, 1996

Filed:

Jul 12, 1995

Appl. No.:

8/501702

Inventors:

Paul Garland - Aylesbury, GB
Craig N. Schubert - Belle Mead NJ
Richard A. Gregory - Belle Mead NJ
Eduardo Garcia-Rameau - Houston TX
Rickey Epps - Houston TX
David Burns - The Woodlands TX
Robert J. Hlozek - The Woodlands TX

Assignee:

Union Carbide Chemicals & Plastics Technology Corporation - Danbury CT

International Classification:

B01D 5348

US Classification:

4232424

Abstract:

Absorption solvents for removing mercaptans from gas streams are disclosed. The absorption solvents comprise an alkylether of a polyalkylene glycol, e. g. , methoxytriglycol, and a secondary monoalkanolamine, e. g. , N-methylethanolamine, as well as optionally other amines, e. g. , methyldiethanolamine and diethanolamine. The absorption solvents do not require the presence of iodine for removal of mercaptans. Absorption processes utilizing the solvents are also disclosed.