Exxon Research and Engineering Company

Other

John Stewart Bradley

Roy L Pruett

John P Dismukes

Jack Wayne Johnson

Ernestine Williams Hill

Edward William Corcoran, Jr

Paul J Tindall

John E Bradley

The present invention provides for microporous ceramic materials having a surface area in excess of 70 m.sup.2 /gm and an open microporous cell structure wherein the micropores have a mean width of less than 20 Angstroms and wherein said microporous structure comprises a volume of greater than about 0.03 cm.sup.3 /gm of the ceramic. The invention also provides for a preceramic composite intermediate composition comprising a mixture of a ceramic precursor and nanoscale size metallic particles, whose pyrolysis product in inert atmosphere or in an ammonia atmosphere at temperatures of up to less than about 1100.degree. C. gives rise to the microporous ceramics of the invention. Also provided is a process for the preparation of the microporous ceramics of the invention involving pyrolysis of the composite intermediate under controlled conditions of heating up to temperatures of less than about 1100.degree. C. to form a microporous ceramic product.

Synthesis of preceramic polymer-stabilized metal colloids and their

The present invention provides for amorphous, nanoporous, catalytic metal-containing ceramic material having a surface area in excess of 70 m.sup.2 /gm and characterized by a high content of open microporous cell structure wherein the micropores have a mean width of less than 20 Angstroms and wherein said microporous structure comprises a volume of greater than about 0.03 cm.sup.3 /gm of the ceramic. The invention also provides for a preceramic composite intermediate composition comprising a mixture of a ceramic precursor and from about 0.5 up to about 65 wt % of an organometallic compound containing a metal of Group IB, II, III, IV, IV, V, VIB, VIIA or VIII of the Periodic Table, including rare earth metals, whose pyrolysis product in ammonia or an inert atmosphere at temperatures of up to less than about 1100.degree. C. gives rise to the nanoporous catalytic ceramics of the invention. Also provided is a process for the preparation of the nanoporous ceramics of the invention involving pyrolysis of the ceramic intermediate under controlled conditions of heating up to temperatures of less than about 1100.degree. C. to form a nanoporous ceramic product useful in catalytic and membrane separation processes.

Nanoporous ceramics with catalytic functionality

The present invention provides for microporous ceramic materials having a surface area in excess of 100 m.sup.2 /gm and an open microporous cell structure wherein the micropores have a mean width of less than 20 Angstroms and wherein said microporous structure comprises a volume of greater than about 0.05 cm.sup.3 /gm of the ceramic. The pyrolysis product of ceramic precursor oligomers or polymers having a number average molecular weight in the range of from about 200 to about 100,000 g/mole in an ammonia atmosphere at temperatures of up to less than about 1200.degree. C. gives rise to the microporous ceramics of the invention. Also provided is a process for the preparation of the microporous ceramics of the invention involving pyrolysis of the ceramic precursor under controlled conditions of heating and with intermediate hold times, up to temperatures of less than 1200.degree. C., preferably less than 1000.degree. C., to form a microporous ceramic product.

Synthesis of microporous ceramics by ammonia pyrolysis of ceramic

Lantern stand with a reflector

A polymer stabilized colloidal transition metal solution wherein the monomer unit of the polymer has the chemical formula R.sub.x MO, where M is a metal, R is an alkyl group, and x is two less than the valence of M.

Transition metal organosols stabilized by organometallic polymers

A method of disposing of fluid waste in underground permeable strata having original fluid pressure in the pores which is less than normal hydrostatic pressure.

Fluid waste disposal

Hydrogen and carbon monoxide are converted into methanol by means of the catalytic action of soluble ruthenium-carbonyl containing complexes at a temperature of from about 250.degree.-300.degree. C., pressures of from about 54 to 200 MPa and CO/H.sub.2 ratio of from 3:1 to 1:10. The soluble ruthenium-carbonyl containing complex is prepared in situ in the reaction medium from sources of ruthenium capable of forming Ru-CO containing complexes.

CO Hydrogenation and alcohol homologation by means of soluble group VIII

Novel bimetallic cluster compounds of the formula [M].sub.n [(Ru.sub.6 C(CO).sub.16).sub.2 L] where M is a cation, L is Tl, In or Ga, and n is a number which satisfies valence requirements. These compounds are useful as homogeneous and heterogeneous catalysts for converting synthesis gas to organic compounds.

Transition metal bimetallic clusters of ruthenium with thallium, indium

This invention relates to new bimetallic cluster compounds of the formula

Growing community of inventors

Gladstone, NJ, United States of America

John Stewart Bradley