Moises E Sanchez

US Patent:

6811726, Nov 2, 2004

Filed:

May 12, 2003

Appl. No.:

10/435383

Inventors:

Moises G. Sanchez - Severna Park MD 21146

International Classification:

H01B 108

US Classification:

2525212, 501123, 117947

Abstract:

This application describes ceramic oxide superconductors, their precursors and methods of preparation. The superconductors contain no copper, but comprise the transition metals Nickel or Cobalt (M ) together with bulky cations of Groups 2 and 1 of the Periodic Table (M and M ) such as Ba and K. Their hexagonal crystal structure comprises parallel chains of highly covalent, octahedrally coordinated oxygen around the transition metal, which exhibits its highest valence +4. The octahedra are facet-linked forming polyacid chains or macroanions that run the full length of crystallites or single crystals along the c axis. The chains are separated by distances that prevent covalency or orbital overlap among them. They are held together by coulombic forces from the cations located between them that also run parallel to the c axis. Electrical current, carried by holes, can only flow within the chains.

US Patent:

20050085394, Apr 21, 2005

Filed:

Aug 2, 2004

Appl. No.:

10/902944

Inventors:

Moises Sanchez - Severna Park MD, US

International Classification:

H01B001/00

US Classification:

505100000

Abstract:

This application describes ceramic oxide superconductors, their precursors and methods of preparation. The superconductors contain no copper, but comprise the transition metals Nickel or Cobalt (M) together with bulky cations of Groups 2 and 1 of the Periodic Table (M and M) such as Ba and K. Their hexagonal crystal structure comprises parallel chains of highly covalent, octahedrally coordinated oxygen around the transition metal, which exhibits its highest valence +4. The octahedra are facet-linked forming polyacid chains or macroanions that run the full length of crystallites or single crystals along the c axis. The chains are separated by distances that prevent covalency or orbital overlap among them. They are held together by coulombic forces from the cations located between them that also run parallel to the c axis. Electrical current, carried by holes, can only flow within the chains. Thus the materials are one-dimensional superconductors of composition MMMO.

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:

43010377, Nov 17, 1981

Filed:

Apr 1, 1980

Appl. No.:

6/136222

Inventors:

Moises G. Sanchez - Severna Park MD
Jose E. Herrera - Ellicott City MD

Assignee:

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

International Classification:

B01J 2104
B01J 2310
C01F 702

US Classification:

252462

Abstract:

A thermally stable, pure transition alumina extrudate suitable for use as a catalyst support has a uniquely defined bimodal pore size distribution and very good mechanical properties. Most of the surface area is in a micropore region having pores of less than 500 Angstrom units, a pore volume of 0. 60 to 0. 80 cm. sup. 3 /g. , a narrowly defined effective pore volume distribution within this region and a median pore diameter which can be controlled within the range of 90-210 Angstrom units. The macropore region made of pores having diameters of 1,000- 10,000 Angstrom units has a pore volume of at least 0. 10 cm. sup. 3 /g. These two pore volumes are essentially connected directly to each other. The extrudates can be strengthened by acidic additives and given increased thermal stability by adding rare earth oxides.

US Patent:

43011314, Nov 17, 1981

Filed:

Nov 28, 1980

Appl. No.:

6/210772

Inventors:

Moises G. Sanchez - Severna Park MD

Assignee:

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

International Classification:

C01B 2516

US Classification:

423321R

Abstract:

This invention is directed to an improvement in the Hill phosphoric acid process, whereby the Hill process can be used with high-iron phosphate rock. The improvement involves oxidation of divalent iron in an early stage of the Hill process, followed by addition of a soluble potassium compound to the acid in the crystallizer.

US Patent:

41548124, May 15, 1979

Filed:

Mar 25, 1977

Appl. No.:

5/781393

Inventors:

Moises G. Sanchez - Severna Park MD
Norman R. Laine - Rockville MD

Assignee:

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

International Classification:

C01F 702

US Classification:

423626

Abstract:

An alumina composition comprising a microcrystalline boehmite-pseudoboehmite intermediate having from about 70 to about 85 weight percent of the total amount of Al. sub. 2 O. sub. 3 present in crystalline form. The composition is prepared by adding aluminum sulfate and sodium aluminate solutions to a mixture of water and aluminum sulfate solution to precipitate alumina and adjusting the pH to a pH higher than the precipitation pH. The reactant concentrations, and rates of addition, temperatures, and pH's in the precipitation are specifically controlled to form the boehmite-pseudoboehmite intermediate.

US Patent:

43715133, Feb 1, 1983

Filed:

Feb 19, 1981

Appl. No.:

6/235876

Inventors:

Moises G. Sanchez - Severna Park MD
Norman R. Laine - Rockville MD

Assignee:

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

International Classification:

C01F 702

US Classification:

423625

Abstract:

An alumina composition comprising a microcrystalline boehmite-pseudoboehmite intermediate having from about 70 to about 85 weight percent of the total amount of Al. sub. 2 O. sub. 3 present in crystalline form. The composition is prepared by adding aluminum sulfate and sodium aluminate solutions to a mixture of water and aluminum sulfate solution to precipitate alumina and adjusting the pH to a pH higher than the precipitation pH. The reactant concentrations, and rates of addition, temperatures, and pH's in the precipitation are specifically controlled to form the boehmite-pseudoboehmite intermediate.

US Patent:

42797799, Jul 21, 1981

Filed:

Aug 8, 1979

Appl. No.:

6/064700

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 2342
B01J 2344
B01J 2346

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.