Charles Bruce Hilton

US Patent:

54988047, Mar 12, 1996

Filed:

Mar 17, 1995

Appl. No.:

8/406266

Inventors:

James R. Sounik - Corpus Christi TX
Graham N. Mott - Corpus Christi TX
Charles B. Hilton - Corpus Christi TX

Assignee:

Hoechst Celanese Corporation - Sommerville NJ

International Classification:

C07C 3910

US Classification:

568764

Abstract:

The present invention provides a unique and novel way of producing carbinols such as 4-hydroxyphenylmethylcarbinol (HPMC). In this new process, a ketone such as 4-hydroxyacetophenone (4-HAP) is heated under suitable hydrogenation conditions of temperature and pressure in the presence of a suitable catalyst and for a sufficient period of time to form HPMC.

US Patent:

53388844, Aug 16, 1994

Filed:

Oct 2, 1992

Appl. No.:

7/913124

Inventors:

Ahmed M. Tafesh - Corpus Christi TX
Olan S. Fruchey - Bad Soden/T.S., DE
Charles B. Hilton - Corpus Christi TX

Assignee:

Hoechst Celanese - Somerville NJ

International Classification:

C07C20900

US Classification:

564138

Abstract:

Acylamides or amine acylate salts of arylalkanolamines are prepared by reacting an arylisonitrosoalkanone with hydrogen and a carboxylic acid, carboxylic acid anhydride or carboxylic acid ester or mixture thereof in the presence of a transition metal catalyst; optionally the product is converted to the corresponding arylalkanolamine hydrochloride salt by reaction of the acylamide or amine acylate salt of the arylalkanolamine with hydrogen chloride in a C. sub. 1 -C. sub. 3 alkyl alcohol.

US Patent:

55233783, Jun 4, 1996

Filed:

Sep 18, 1995

Appl. No.:

8/529697

Inventors:

James R. Sounik - Corpus Christi TX
Graham N. Mott - Corpus Christi TX
Charles B. Hilton - Corpus Christi TX

Assignee:

Hoechst Celanese Corporation - Sommerville NJ

International Classification:

C08G 802
C08G 6538

US Classification:

528125

Abstract:

The present invention provides a unique and novel way of producing polyhydroxystyrene which comprises the steps of (a) heating 4-hydroxyacetophenone under suitable hydrogenation conditions of temperature and pressure in the presence of a suitable palladium catalyst and a basic material and for a sufficient period of time to form 4-hydroxyphenylmethylcarbinol; (b) heating 4-hydroxyphenylmethylcarbinol under suitable conditions of temperature and pressure and for a sufficient period of time to form said polyhydroxystyrene.

US Patent:

45607893, Dec 24, 1985

Filed:

Jul 3, 1984

Appl. No.:

6/627381

Inventors:

Kenneth G. Davenport - Corpus Christi TX
Charles B. Hilton - Corpus Christi TX

Assignee:

Celanese Corporation - New York NY

International Classification:

C07C10346
C07C10338

US Classification:

560142

Abstract:

4-Acetoxyacetanilide is produced by subjecting phenyl acetate to a Fries rearrangement or phenol and an acetylating agent to a Friedel-Crafts acetylation to form 4-hydroxyacetophenone which is then reacted with hydroxylamine or a hydroxylamine salt to form 4-hydroxyacetophenone oxime. The oxime is then subjected to a Beckmann rearrangement and accompanying acetylation with acetic anhydride to form the 4-acetoxyacetanilide.

US Patent:

50684485, Nov 26, 1991

Filed:

Oct 5, 1990

Appl. No.:

7/593143

Inventors:

Daniel D. Lindley - Portland TX
Thomas A. Curtis - Tega Cay SC
Timothy R. Ryan - Corpus Christi TX
Edward M. de la Garza - Corpus Christi TX
Charles B. Hilton - Corpus Christi TX
Thomas M. Kenesson - Corpus Christi TX

Assignee:

Hoechst Celanese Corporation - Somerville NJ

International Classification:

C07C 4545

US Classification:

568319

Abstract:

A continuous process is provided for the production of 4'-isobutylacetophenone (4-IBAP) comprising feeding liquid hydrogen fluoride (HF) and an acetylating agent into an extractor-reactor to form a first, HF-rich phase containing the acetylating agent, feeding isobutylbenzene (IBB) to the extractor-reactor to form a second, IBB-rich phase which is contacted with said first, HF-rich phase in a manner such that the acetylating agent reacts with IBB to form 4-IBAP which is extracted into the first, HF-rich phase, and a light IBB-rich second phase containing the bulk of unreacted IBB, externally recycling said second, IBB-rich phase to the IBB feed point in combination with fresh IBB to make up for IBB consumed in the reaction and that and dissolved in the HF-rich phase, and withdrawing HF-rich phase containing 4-IBAP from the extractor-reactor.

US Patent:

45242178, Jun 18, 1985

Filed:

Jun 8, 1984

Appl. No.:

6/618659

Inventors:

Kenneth G. Davenport - Corpus Christi TX
Charles B. Hilton - Corpus Christi TX

Assignee:

Celanese Corporation - New York NY

International Classification:

C07C10312
C07C10322

US Classification:

564223

Abstract:

N-acyl-hydroxy aromatic amines, e. g. N-acetyl-para-aminophenol (APAP), are prepared by reacting a hydroxy aromatic ketone, e. g. 4-hydroxyacetophenone, with a hydroxylamine salt and a base to obtain the ketoxime of the ketone, e. g. 4-hydroxyacetophenone oxime, and then subjecting the ketoxime to a Beckmann rearrangement in the presence of a catalyst to form the N-acyl-hydroxy aromatic amine.

US Patent:

52200639, Jun 15, 1993

Filed:

May 10, 1991

Appl. No.:

7/698504

Inventors:

Ahmed M. Tafesh - Corpus Christi TX
Olan S. Fruchey - Bad Soden/T.S., DE
Charles B. Hilton - Corpus Christi TX

Assignee:

Hoechst Celanese Corporation - DE

International Classification:

C07C23300
C07C 5308

US Classification:

564135

Abstract:

Acylamides or amine acylate salts of arylalkanolamines are prepared by reacting an arylisonitrosoalkanone with hydrogen and a carboxylic acid, carboxylic acid anhydride or carboxylic acid ester or mixture thereof in the presence of a transition metal catalyst; optionally the product is converted to the corresponding arylalkanolamine hydrochloride salt by reaction of the acylamide or amine acylate salt of the arylalkanolamine with hydrogen chloride in a C. sub. 1 -C. sub. 3 alkyl alcohol.

US Patent:

53938607, Feb 28, 1995

Filed:

Feb 4, 1994

Appl. No.:

8/191682

Inventors:

George Kvakovszky - Corpus Christi TX
Richard Vicari - Corpus Christi TX
Olan S. Fruchey - Corpus Christi TX
Ahmed M. Tafesh - Corpus Christi TX
Charles B. Hilton - Corpus Christi TX

Assignee:

Hoechst Celanese Corporation - Somerville NJ

International Classification:

C07D24112
C09K 1934

US Classification:

528172

Abstract:

The present invention provides new polymer compositions which contain novel substituted pyrazines or pyrazine derivatives ("NPD") which are functional and have useful application as a monomer (co-monomer) for a variety of high performance polymers such as polyester, polyarylate, polycarbonate, polyetherketones, epoxides, polyimides, polyamides, and polyamides-imides. These NPD have the general formula: ##STR1## wherein R. sub. 1, R. sub. 2, R. sub. 3, and R. sub. 4 are defined herein.