1
Melinda A Mabry, William W Prichard, Stanislaw B Ziemecki: Process for making tetrahydrofuran and 1,4-butanediol using Pd/Re hydrogenation catalyst. E I Du Pont de Nemours and Company, James A Costello, October 29, 1985: US04550185 (99 worldwide citation)

Palladium/rhenium-on-carbon catalyst; a method employing said catalyst to produce tetrahydrofuran, 1,4-butanediol or mixtures thereof in selectable ratios from a number of starting reactants; and a method for making the Pd/Re/C catalyst.


2
Mark James Marquisee, William W Prichard: Semipermeable microcapsules containing heterogeneous catalysts and ferromagnetic materials. E I Du Pont de Nemours and Company, May 4, 1976: US03954666 (22 worldwide citation)

Described are semipermeable microcapsules which comprise an outer semipermeable polymeric skin encapsulating a finely divided heterogeneous catalyst and a ferromagnetic material. The microcapsules are useful as magnetic, heterogeneous catalysts.


3
Melinda A Mabry, William W Prichard, Stanislaw B Ziemecki: Pd/Re hydrogenation catalyst for making tetrahydrofuran and 1,4-butanediol. E I Du Pont de Nemours and Company, September 2, 1986: US04609636 (20 worldwide citation)

Palladium/rhenium-on-carbon catalyst; a method employing said catalyst to produce tetrahydrofuran, 1,4-butanediol or mixtures thereof in selectable ratios from a number of starting reactants; and a method for making the Pd/Re/C catalyst.


4
William W Prichard: Conversion of furan to 1,4-butanediol and tetrahydrofuran. E I Du Pont de Nemours and Company, March 27, 1979: US04146741 (8 worldwide citation)

Furan is hydrogenated in the presence of a nickel catalyst and a dicarboxylic acid having 4 to 10 carbons to produce 1,4-butanediol and tetrahydrofuran.


5
William W Prichard: Hydrogenation of butadienepolyperoxide to unsaturated diols. E I Du Pont de Nemours and Company, June 24, 1980: US04209651 (4 worldwide citation)

A process for the hydrogenation of butadienepolyperoxide in a suitable solvent, e.g., tetrahydrofuran, at temperatures of 75.degree.-110.degree. C. and pressure above 2000 psia by contacting the butadienepolyperoxide and hydrogen in the presence of metallic silver. The process produces 1-butene-3,4- ...


6
Richard V Lindsey Jr, William W Prichard: Oxidation of butadiene to furan. E I Du Pont de Nemours and Company, November 3, 1981: US04298531 (2 worldwide citation)

Process for preparing furan from 1,3-butadiene, the process comprising contacting the butadiene, at about 65.degree. C. to about 120.degree. C., with a solution having a pH of 0-2.5 and containing palladium ions and a heteropolyacid having a redox potential greater than 0.5 volt, to produce furan.


7
William W Prichard, Francis Wilfred Stacey: Substituted diphenyl-3-formazancarbonitrile insecticides. E I Du Pont de Nemours and Company, January 17, 1978: US04069320 (2 worldwide citation)

Substituted 1,5-diphenyl-3-formazancarbonitriles, certain of which are novel, are useful in controlling insects. A preferred compound is 1,5-bis(4-trifluoromethylphenyl)-3-formazancarbonitrile.


8
Michael J Kelley, William W Prichard: Hydrogenation of butadienepolyperoxide with activated phase-pure NiAl.sub.3. E I Du Pont de Nemours and Company, January 27, 1981: US04247722 (1 worldwide citation)

A process for hydrogenation of butadienepolyperoxide to 1,2-butanediol and 1,4-butanediol which comprises hydrogenating a mixture of butadienepolyperoxide in a solvent and with a catalyst comprising an activated phase-pure NiAl.sub.3 at a temperature of from 75.degree.-120.degree. C. and a pressure ...


9
William W Prichard: Process for the preparation of 2,5-dihydrofuran. E I Du Pont de Nemours and Company, March 10, 1981: US04255338

A process for the hydrogenation of butadienepolyperoxide in a suitable solvent, e.g., tetrahydrofuran, at temperatures of 75.degree.-110.degree. C. and pressure above 2000 psia by contacting the butadienepolyperoxide and hydrogen in the presence of metallic silver. The process produces 1-butene-3,4- ...


10
Melinda Ann Mabry, Stanislaw Bogdan Ziemecki, William W Prichard: Pd/re hydrogenation catalyst and process for making same. Ei Du Pont de Nemours &Amp Co, LU XINHUA, January 24, 1987: CN85101672

This invention relates to Pd/Re catalyst on carbon carrier and its method of prepn., and also relates to the prepn. of tetrahydrofuran and 1,4-butanediol or the mixt. of them by this catalyst with various reactants (with selected ratios), and relates to method of preparing Pt/Re/C catalyst.