Michael Vance Ernest

US Patent:

6440397, Aug 27, 2002

Filed:

Jul 31, 2001

Appl. No.:

09/919183

Inventors:

Michael Bruce Thomas - Pasadena MD
Michael Vance Ernest - Catonsville MD
Sandra Joan Kempske - Baltimore MD

Assignee:

W. R. Grace Co. -Conn. - Columbia MD

International Classification:

A61K 716

US Classification:

424 49, 424401, 424484, 423339, 423335, 423338

Abstract:

Silica compositions for abrasive systems in dentifrice formulations are disclosed. The silica abrasive system comprises (a) silica gels having a median particle size below 7 microns, a pH of from about 6 to about 11 and powder RDAs of from 100 to about 200 and (b) silica gels or precipitates having a median particle size of 7 microns or greater and powder RDAs of from 50 to about 180. Silica (a) is preferably prepared by contacting a hydrous silica gel with an alkaline medium. Dentifrice compositions comprising the abrasive system has an RDA of 150 or less and PCRs of at least 80 and up to about 150, and an REA of less than about 30 (as measured on the IU scale).

US Patent:

6585960, Jul 1, 2003

Filed:

Jul 31, 2001

Appl. No.:

09/919184

Inventors:

Michael Bruce Thomas - Pasadena MD
Michael Vance Ernest - Catonsville MD
Sandra Joan Kempske - Baltimore MD

Assignee:

W. R. Grace Co.-Conn. - Columbia MD

International Classification:

A61K 716

US Classification:

424 49, 424484

Abstract:

Silica compositions for abrasive systems in dentifrice formulations are disclosed. The silica abrasive system comprises (a) silica gels having a median particle size below 7 microns, a pH of from about 6 to about 11 and powder RDAs of from 100 to about 200 and (b) silica gels or precipitates having a median particle size of 7 microns or greater and powder RDAs of from 50 to about 180. Silica (a) is preferably prepared by contacting a hydrous silica gel with an alkaline medium. Dentifrice compositions comprising the abrasive system has an RDA of 150 or less and PCRs of at least 80 and up to about 150, and an REA of less than about 30 (as measured on the IU scale).

US Patent:

41794087, Dec 18, 1979

Filed:

Mar 25, 1977

Appl. No.:

5/781379

Inventors:

Moises G. Sanchez - Severna Park MD
Michael V. Ernest - Baltimore MD
Norman R. Laine - Rockville MD

Assignee:

W. R. Grace & Co. - New York NY

International Classification:

B01J 2104
B01J 3700

US Classification:

252448

Abstract:

Spheroidal alumina particles have a combination of high macroporosity, surface area, crush strength and low attrition loss and bulk density. The particles are prepared by an improved external gelation oil-drop process. In the process a slurry of alumina, preferably a microcrystalline boehmite-pseudoboehmite intermediate, is prepared in an acidic aqueous medium and droplets of the slurry are passed through air into a column containing an upper body of water-immiscible liquid and ammonia and a lower body of aqueous coagulating agent. Catalysts employing the particles as a support and having catalytic agents distributed at controlled depths in the particle have excellent initial and sustained activity and durability, especially for eliminating pollutants in automotive exhaust streams.

US Patent:

49771299, Dec 11, 1990

Filed:

Mar 13, 1989

Appl. No.:

7/322444

Inventors:

Michael V. Ernest - Baltimore MD

Assignee:

W. R Grace & Co.-Conn. - New York NY

International Classification:

B01J 2106
B01J 2108
B01J 2358
B01J 2360

US Classification:

502330

Abstract:

A catalyst suitable for use as a three-way catalyst having low H. sub. 2 S emissions for emission control and with substantially no ceria present is made with a refractory oxide particle or powder support having deposited thereon about 0. 5-20% by weight of a non-rate earth oxide stabilizer, at least 0. 5 to about 5% by weight of an alkali metal oxide as a promoter, and a catalytically-effective amount of one or more platinum group metals. The preferred refractory oxide is alumina and the non-rare earth oxide stabilizer can be an oxide such as ZrO. sub. 2, MgO, CaO, SnO, CaO, Y. sub. 2 O. sub. 3, TiO. sub. 2, ZnO, B. sub. 2 O. sub. 3, P. sub. 2 O. sub. 5, SnO. sub. 2, Bi. sub. 2 O. sub. 3, or SiO. sub. 2 with the preferred oxide being zirconia.

US Patent:

45857520, Apr 29, 1986

Filed:

Aug 15, 1984

Appl. No.:

6/640874

Inventors:

Michael V. Ernest - Catonsville MD

Assignee:

W. R. Grace & Co. - New York NY

International Classification:

F23D 340

US Classification:

502314

Abstract:

A high temperature stable catalyst is made with fine particles of a base metal such as chromium, hafnium and niobium or their oxides dispersed throughout a matrix made of composite particles having at least one platinum group metal on a ceria promoted, high temperature chemically stabilized refractory oxide powder. The refractory oxide powder can be either alumina, alumina powder which has been calcined at a temperature near incipient alpha alumina formation, silica-alumina or zirconia. The base metal or base metal oxide comprises about 15% to 90% by weight of the total weight and the platinum group metal comprises 0. 05% to 10% by weight of the total weight. The catalyst composition can be applied as a washcoat to conventional substrates or it can be formed into shaped catalysts. The washcoat is made by mixing together one slip containing the composite particles with a second slip containing the base metal or base metal oxide particles.

US Patent:

45131015, Apr 23, 1985

Filed:

Jul 27, 1983

Appl. No.:

6/517809

Inventors:

Alan W. Peters - Rockville MD
Gwan Kim - Olney MD
Michael V. Ernest - Baltimore MD

Assignee:

W. R. Grace & Co. - New York NY

International Classification:

B01J 2104
B01J 2310
B01J 2358

US Classification:

502304

Abstract:

Alumina particle catalysts which can be used for auto emission control and especially as a three-way catalyst have increased performance. The alumina particles which are preferably spheroids have a low compacted bulk density of about 20 to 36 pounds per cubic foot and a smaller size on the order of less than 2. 6 mm for the preferred spheroids. The spheroid embodiment also has a high crush strength. Because of the small size the ratio of the geometric surface area to the bulk volume (GSA/BV) is at least about 14 cm. sup. 2 /cm. sup. 3. These alumina particles are impregnated with a catalytically-effective amount of one or more platinum group metals such as platinum, palladium or rhodium and additional promoters can also be added. In the preferred embodiment the alumina particles have a GSA/BV ratio of from about 17 to 25 cm. sup. 2 /cm. sup. 3 for substantially improved performance.

US Patent:

41705734, Oct 9, 1979

Filed:

Apr 7, 1978

Appl. No.:

5/894316

Inventors:

Michael V. Ernest - Baltimore MD
James M. Maselli - Columbia MD

Assignee:

W. R. Grace & Co. - New York NY

International Classification:

B01J 2104
B01J 2310
B01J 2340

US Classification:

252462

Abstract:

A catalyst composition comprising a composite of ceria, lanthana, and alumina and a catalytically-effective amount of one or more platinum group metals deposited on the composite is disclosed. The composite is prepared by depositing a cerium compound on a calcined admixture of the lanthana and the alumina and calcining the composite. The catalyst is capable of operating in the combustion of carbonaceous fuel at high temperatures, e. g. , greater than 2400. degree. F. (1317. degree. C. ), for extended periods of time such as 20 hours with low emissions of carbon monoxide and nitrogen oxides.

US Patent:

44514417, May 29, 1984

Filed:

Sep 9, 1983

Appl. No.:

6/523511

Inventors:

Michael V. Ernest - Baltimore MD
James M. Maselli - Columbia MD

Assignee:

W. R. Grace & Co. - New York NY

International Classification:

B01D 5336

US Classification:

4232132

Abstract:

Suspended particles in exhaust gases, such as carbon and lead particles in internal combustion engine exhaust gases, are removed by passing the gases through a coarse filter and then through a fine filter. The filters may comprise a ceramic foam material and a catalyst material effective for the conversion of the carbon particles and/or gaseous pollutants in the exhaust gases to innocuous entities may be deposited on the filters.