Pennwalt Corporation

Elf Atochem North America, Inc.

Robert B Hager

Sameeh S Toukan

Bernard Buchholz

Maher Y Elsheikh

Richard M Crooker

Michael J Lindstrom

Edward J Dzierza

Gerald Joseph Walter

A process is provided for producing alkylthio-substituted carboxylic acids and arylthio-substituted carboxylic acids and their corresponding alkylthio-substituted thioesters and arylthio-substituted thioesters. The process comprises reacting a mercaptan with a lactone in the presence of an acidic catalyst at temperatures of about 100.degree. C. to about 350.degree. C. The process for preparing the thio-substituted carboxylic acids and thio-substituted thioesters may be a continuous process or a batch process.

Process for producing alkylthio- and arylthio-substituted carboxylic

HCFC blowing agents such as 141b which are stabilized with diethylhydroxylamine, 1,4-benzoquinone, or 2,6-di-t-butylbenzoquinone.

Stabilized 141b

A process is disclosed for continuously preparing dialkyl disulfides and dialkyl polysulfides by reacting at elevated temperature and in the presence of a solid, particulate catalyst an alkene and hydrogen sulfide in a first reaction zone, and then passing the reactor effluent into a second reaction zone where it is reacted at elevated temperature with molten, elemental sulfur in the presence of a solid, particulate catalyst.

Process for the manufacture of dialkyl disulfides and polysulfides

A continuous process is provided for the vapor-phase preparation of C.sub.1 -C.sub.18 alkyl mercaptans where a di C.sub.1 -C.sub.18 alkyl sulfide is reacted with a molar excess of hydrogen sulfide at elevated temperature in the presence of a specified synthetic zeolite containing at least 10 percent by weight of an alkali metal, expressed as Na.sub.2 O.

Process for converting dialkyl sulfides to alkyl mercaptans

A process is provided for preparing alkyl mercaptans by reacting a dialkyl sulfide with hydrogen sulfide in the presence of a zeolite catalyst.

The invention concerns epoxides and alcohols of the structures ##STR1## and

Fluorine and sulfur-containing compositions

The invention concerns epoxides and alcohols of the structures ##EQU1## and

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Collegeville, PA, United States of America

Robert B Hager