Joseph J Fox

US Patent:

6888029, May 3, 2005

Filed:

Jan 22, 2003

Appl. No.:

10/349198

Inventors:

Stephen L. Buchwald - Newton MA, US
Joseph M. Fox - Wilmington DE, US

Assignee:

Massachusetts Institute of Technology - Cambridge MA

International Classification:

C07C209/08
C07C209/10
C07C209/22

US Classification:

564396, 564405, 564406, 564413

Abstract:

The present invention relates to a process for the preparation of N-aryl amine and N-aryl amide compounds. Generally, the process of the present invention involves reacting a compound having a primary or secondary amino or amido group with an arylating compound, in the presence of a weak base and a transition metal catalyst, under reaction conditions effective to form an N-aryl amine or N-aryl amide compound, the transition metal catalyst comprising a Group 8 metal, e. g. , Ni, Pd, or Pt, and at least one carbene-containing ligand. Typically, the transition metal catalyst is formed in a preceding step from the conjugate acid form of the carbene ligand, a stoichiometric amount of a strong base, and a Group 8 metal atom or ion.

US Patent:

42306779, Oct 28, 1980

Filed:

Nov 30, 1978

Appl. No.:

5/963805

Inventors:

Tadashi J. Kagetsu - Lewiston NY
William B. De Atley - Grand Island NY
Joseph S. Fox - Altamonte Springs FL
Oreste J. Malacarne - Grand Junction CO

Assignee:

Union Carbide Corporation - New York NY

International Classification:

C01G 37033

US Classification:

423 54

Abstract:

Method for the recovery of high purity Cr. sub. 2 O. sub. 3 from a Na. sub. 2 CrO. sub. 4 or Na. sub. 2 Cr. sub. 2 O. sub. 7 solution by producing (NH. sub. 4). sub. 2 CrO. sub. 4 by solvent extraction, evaporating the aqueous (NH. sub. 4). sub. 2 CrO. sub. 4 and igniting the resulting solids to provide high purity Cr. sub. 2 O. sub. 3.

US Patent:

42072956, Jun 10, 1980

Filed:

Feb 13, 1979

Appl. No.:

6/011868

Inventors:

Tadashi J. Kagetsu - Lewiston NY
William B. De Atley - Grand Island NY
Joseph S. Fox - Altamonte Springs FL

Assignee:

Union Carbide Corporation - New York NY

International Classification:

C01G 3702

US Classification:

423 55

Abstract:

Method for the recovery of chrome hydrate or high purity Cr. sub. 2 O. sub. 3 from chromium ores by roasting the ore with Na. sub. 2 CO. sub. 3 and CaO, water leaching the roasted mass, precipitating aluminum impurities from the leach liquor as Al(OH). sub. 3 and contacting the leach liquor with sulfur and NaOH in order to reduce the chromium values in the leach liquor from valence 6 to 3 to provide a chrome hydrate precipitate. The chrome hydrate precipitate is acid repulped to provide a chrome hydrate from which sodium impurities have been removed. The chrome hydrate is dried and the resulting solids are calcined to provide a high purity Cr. sub. 2 O. sub. 3.