Lawrence Adrian Hebert

US Patent:

51091380, Apr 28, 1992

Filed:

May 14, 1991

Appl. No.:

7/699530

Inventors:

Michael T. Holbrook - Baton Rouge LA
Lawrence A. Hebert - Baton Rouge LA
Stephen W. Najmy - Midland MI
Ernest F. Stine - Knoxville TN
Reimer Hasche - Hammah, DE

Assignee:

The Dow Chemical Company - Midland MI

International Classification:

C07C 1716

US Classification:

570258

Abstract:

A process for hydrohalogenating methanol with a hydrogen halide using a catalyst having an initial zone of lower activity and subsequent zones of higher activity so that coke formation and pressure drop are decreased and catalyst life is increased while overall high catalyst activity is maintained. One example of such a process uses a low surface area amorphous alumina in an initial zone and then progressively higher surface area alumina in subsequent zones.

US Patent:

51837978, Feb 2, 1993

Filed:

Nov 7, 1991

Appl. No.:

7/789217

Inventors:

Michael T. Holbrook - Baton Rouge LA
Lawrence A. Hebert - Baton Rouge LA
Stephen W. Najmy - Midland MI
Ernest F. Stine - Knoxville TN
Reimer Hasche - Hammah, DE

Assignee:

The Dow Chemical Company - Midland MI

International Classification:

B01J 2104

US Classification:

502355

Abstract:

A process for hydrohalogenating methanol with a hydrogen halide using a catalyst having an initial zone of lower activity and subsequent zones of higher activity so that coke formation and pressure drop are decreased and catalyst life is increased while overall high catalyst activity is maintained. One example of such a process uses a low surface area amorphous alumina in an initial zone and then progressively higher surface area alumina in subsequent zones.

US Patent:

50233874, Jun 11, 1991

Filed:

Apr 30, 1990

Appl. No.:

7/517000

Inventors:

David H. West - Baton Rouge LA
Lawrence A. Hebert - Baton Rouge LA
Roger L. Bowlin - Denham Springs LA
Michael T. Holbrook - Baton Rouge LA

Assignee:

The Dow Chemical Company - Midland MI

International Classification:

C07C 1710

US Classification:

570252

Abstract:

An adiabatic vapor phase chlorination of methylene chloride, methyl chloride or a mixture thereof is improved by the injection of a portion of the methylene chloride, methyl chloride or mixture thereof into the reactor in the liquid state under conditions such that the temperature throughout the reaction zone is maintained at less than about 500. degree. C.

US Patent:

56591080, Aug 19, 1997

Filed:

Jul 7, 1995

Appl. No.:

8/499353

Inventors:

Michael T. Holbrook - Baton Rouge LA
Lawrence A. Hebert - Baton Rouge LA
Katherine A. Pividal - Baton Rouge LA
Celio Lume Pereira - Nachtigallenweg, DE

Assignee:

The Dow Chemical Company - Midland MI

International Classification:

C07C 710
C10G 4500

US Classification:

585833

Abstract:

A saturation process for essentially completely saturating unsaturated halogenated hydrocarbonaceous materials in a feedstock containing such unsaturated materials, employing a first recycle reactor for accomplishing the bulk of the saturation and a second, single pass, plug flow-type polishing reactor in combination.

US Patent:

52685187, Dec 7, 1993

Filed:

Mar 17, 1993

Appl. No.:

8/032565

Inventors:

David H. West - Baton Rouge LA
Lawrence A. Hebert - Baton Rouge LA
Stanford S. Kirsch - Baton Rouge LA

Assignee:

The Dow Chemical Company - Midland MI

International Classification:

C07C 1710

US Classification:

570255

Abstract:

Process and apparatus for enhancing entrainment and self-stirring adjacent the entry of a reactor vessel of at least partly-reacted materials in an incoming stream of reactants.