Daryl W Roberts

US Patent:

46054758, Aug 12, 1986

Filed:

Jan 28, 1985

Appl. No.:

6/695440

Inventors:

Daryl L. Roberts - Fremont CA
Richard M. Laine - Palo Alto CA

Assignee:

SRI International - Menlo Park CA

International Classification:

C25F 500

US Classification:

204130

Abstract:

A process for separating oxygen from gas mixture containing oxygen is disclosed. The gas mixtures are contacted with a solution of an organometallic complex oxygen carrier and an electrolyte in an organic solvent. During the contact, oxygen is bound to the carrier. After the contacting step is completed the solution is electrochemically oxidized with resultant release of oxygen which is recovered. The solution is then electrochemically reduced bringing the oxygen carrier to its original condition and ready for reuse.

US Patent:

55832407, Dec 10, 1996

Filed:

Mar 2, 1994

Appl. No.:

8/205183

Inventors:

William J. Asher - Half Moon Bay CA
Daryl L. Roberts - Winchester MA
Jerry L. Jones - Menlo Park CA
Douglas E. Gottschlich - Mountain View CA

Assignee:

SRI International - Menlo Park CA

International Classification:

B01J 800
B01J 1200
B01J 1400

US Classification:

554 98

Abstract:

An exothermic process for forming a product which may be in a liquid phase is disclosed wherein a first reactant, preferably a liquid reactant, is directly fed into a reaction zone containing mixing elements and which comprises a first compartment of a reactor. A second reactant, which is maintained at a higher pressure, is fed into a second compartment of the reactor separated from the first compartment by a porous wall. The second reactant passes through this porous wall into the reaction zone to react with the first reactant. The process thereby controls rates of the reactions and the exothermic heats generated by the reactions. Pulsatile flow in one or both reaction compartments improves mixing. An evaporator for a portion of the product improves product quality and permits higher reaction temperatures in the reactor.

US Patent:

53229134, Jun 21, 1994

Filed:

Jun 19, 1990

Appl. No.:

7/540331

Inventors:

Yigal D. Blum - Menlo Park CA
Richard M. Laine - Palo Alto CA
Kenneth B. Schwartz - San Mateo CA
Robert M. Platz - San Mateo CA
David J. Rowcliffe - Los Altos CA
Allen L. Dodge - Newark CA
Jonathan M. McLeod - Oakland CA
Daryl L. Roberts - Fremont CA

Assignee:

SRI International - Menlo Park CA

International Classification:

C08G 7704
C08G 7760
C08G 7762
C07F 708

US Classification:

528 15

Abstract:

Silazanes and related compounds are prepared by (a) providing a precursor containing at least one Si--N bond, cleaving an Si--N bond in the precursor in the presence of hydrogen or a hydrogen donor, and reacting the cleavage product with a second cleavage product or with a compound containing an Si--H bond, an N--H bond, or both, to produce an initial silazane product having at least one newly formed Si--N bond or (b) providing one or more reactants which contain an Si--H bond and an N--H bond, and causing reaction to occur between the two bonds in the presence of a transition metal catalyst to form an initial silazane product having newly formed Si--N bonds. Further products may result from additional reaction of either type. Novel compounds, including siloxazanes and high molecular weight polysilazanes, are provided. The compounds may be pyrolyzed to yield ceramic materials such as silicon nitride, silicon carbide and silicon oxynitride.

US Patent:

59361069, Aug 10, 1999

Filed:

Dec 6, 1996

Appl. No.:

8/761598

Inventors:

William J. Asher - Half Moon Bay CA
Daryl L. Roberts - Winchester MA
Jerry L. Jones - Menlo Park CA
Douglas E. Gottschlich - Mountain View CA

Assignee:

SRI International - Menlo Park CA

International Classification:

C07C 5300

US Classification:

554 98

Abstract:

An process for forming a product which may be in a liquid phase is disclosed wherein a first reactant, preferably a liquid reactant, is directly fed into a reaction zone containing mixing elements and which comprises a first compartment of a reactor. A second reactant, which is maintained at a higher pressure, is fed into a second compartment of the reactor separated from the first compartment by a porous wall. The second reactant passes through this porous wall into the reaction zone to react with the first reactant. The process thereby controls rates of the reactions and the exothermic heats generated by the reactions. Pulsatile flow in one or both reaction compartments improves mixing. An evaporator for a portion of the product improves product quality and permits higher reaction temperatures in the reactor.