Rudolph Rosenthal

US Patent:

39352781, Jan 27, 1976

Filed:

Mar 4, 1970

Appl. No.:

5/016564

Inventors:

Rudolph Rosenthal - Broomall PA
Harold A. Sorgenti - Olympia Fields IL

Assignee:

Atlantic Richfield Company - Los Angeles CA

International Classification:

C07C17902

US Classification:

260610R

Abstract:

Diperoxides, useful as free radical type polymerization initiators, for example, are preparable from an organic hydroperoxide such as t-butyl hydroperoxide, and a ketone using catalyst comprising molybdenum or vanadium.

US Patent:

39623025, Jun 8, 1976

Filed:

Jul 18, 1975

Appl. No.:

5/597106

Inventors:

Rudolph Rosenthal - Broomall PA
John G. Zajacek - Devon PA

Assignee:

Atlantic Richfield Company - Los Angeles CA

International Classification:

C07C11800

US Classification:

260453P

Abstract:

Method for the production of isocyanates from esters of carbamic acids, (urethanes) by thermally decomposing the ester of the carbamic acid while said ester is dissolved in a suitable inert solvent to produce the isocyanate and alcohol and separately recovering the isocyanate and alcohol.

US Patent:

40556298, Oct 25, 1977

Filed:

Dec 13, 1976

Appl. No.:

5/750109

Inventors:

Rudolph Rosenthal - Broomall PA
Edward T. Shawl - Wallingford PA

Assignee:

Atlantic Richfield Company - Los Angeles CA

International Classification:

C01B 1900
C01G 302

US Classification:

423509

Abstract:

A process for the recovery of selenium from a urethane solution containing selenium compounds which comprises contacting the selenium-containing urethane solution at a suitable temperature with copper (I) chloride, oxygen or an oxygen-containing gas such as air, and a complexing solvent such as an amine or nitrile to form an insoluble precipitate of copper-selenium compounds or complexes. The selenium and copper may be recovered from the resulting precipitate in a form suitable for reuse in the preparation of urethanes and selenium removal respectively.

US Patent:

39364844, Feb 3, 1976

Filed:

Sep 25, 1974

Appl. No.:

5/508972

Inventors:

Rudolph Rosenthal - Broomall PA
John G. Zajacek - Strafford PA

Assignee:

Atlantic Richfield Company - Los Angeles CA

International Classification:

C07C11800

US Classification:

260453P

Abstract:

A method for the production of isocyanic acid esters (isocyanates) from substituted ureas by thermally decomposing the substituted urea at elevated temperatures while said urea is dissolved in a suitable inert solvent and in the presence of an inert carrier agent to produce the isocyanate and/or amine as overhead products in the vapor phase minimizing the recombination of the isocyanate and the amine and separately recovering the isocyanate and amine.

US Patent:

39313247, Jan 6, 1976

Filed:

Nov 20, 1973

Appl. No.:

5/417679

Inventors:

Rudolph Rosenthal - Broomall PA
Giovanni A. Bonetti - Ardmore PA

Assignee:

Atlantic Richfield Company - Los Angeles CA

International Classification:

C07C 4500

US Classification:

260586R

Abstract:

Compounds of the formula ##EQU1## WHEREIN R is a hydrocarbyl radical selected from the group consisting of alkyl, aralkyl and cycloalkyl having from 3 to 12 carbon atoms and n is an integer from 1 to 9 are prepared by reacting a 1,1-bis (hydrocarbyl peroxy) cycloalkane with cycloaliphatic ketones in the presence of a molybdenum containing catalyst. The 1,1-bis (hydrocarbyl peroxy) cycloalkane can be prepared in situ from an organic hydroperoxide and a cycloalkanone. The compounds have utility as solvents and certain specific members of the class have utility as intermediates to adipic acid by further oxidation or as an intermediate to 2-t-butoxyphenol by known dehydrogenation methods.

US Patent:

39535266, Apr 27, 1976

Filed:

Sep 22, 1972

Appl. No.:

5/291418

Inventors:

Rudolph Rosenthal - Broomall PA

Assignee:

Atlantic Richfield Company - Los Angeles CA

International Classification:

C07C 3700
C07C 3706

US Classification:

260621H

Abstract:

Cyclohexene is converted to 3,6-diacyloxycyclohexene by reaction with a C. sub. 2 to C. sub. 6 aliphatic acyclic saturated carboxylic acid and an organic hydroperoxide in the presence of a copper catalyst. The diacyloxycyclohexene is hydrolyzed to the corresponding dihydroxycyclohexene and dehydrogenated to hydroquinone. For example, with acetic acid the cyclohexene is converted to the 3,6-diacetoxycyclohexene which after hydrolysis and dehydrogenation gives hydroquinone.