Bayer Corporation

Miles Inc.

Mobay Corporation

Daniel M. Wasleski

Karl G. Steinbeck

Jeffrey D. Macke

Peter E. Newallis

Jeffrey D Macke

Peter E Newallis

Daniel M Wasleski

Karl G Steinbeck

Vidyanatha A Prasad

Dennis E Jackman

David T Erdman

Vijay C Desai

Daniel N Wasleski

Disclosed herein is a process for preparing high yields of methyl dithiocarbazinate by reacting carbon disulfide, hydrazine and a base in an aqueous medium, in an effective ratio to form a dithiocarbazinate salt followed by methylating the dithiocarbazinate salt with methyl bromide.

Process for preparing methyl dithiocarbazinate by reacting methyl

Disclosed herein is an aqueous process for preparing high yields of methyl dithiocarbazinate by reacting carbon disulfide and hydrazine in an effective ratio, in an aqueous medium to form hydrazinium dithiocarbazinate salt followed by methylating the hydrazinium dithiocarbazinate with methyl bromide.

Oxiranes are made from ketones by heating a ketone which is preferably an alkyl ketone to a temperature of from about 60.degree. to about 90.degree. C. (preferably about 80.degree. C.) in the presence of a sulfonium salt, a quaternary ammonium salt and a potassium hydroxide solution which is at least 61% potassium hydroxide. It is preferred that no organic solvent be included in the reaction mixture. The potassium hydroxide is generally included in an amount such that for every mole of ketone, from about 3 to about 4 moles of potassium hydroxide are present. The sulfonium salt is generally used in an amount of at least 1.1 moles for each mole of ketone. The quaternary ammonium salt is generally used in an amount of from about 1 to about 5 mol % based on moles of ketone present.

Process for the production of oxiranes

Trimethylsulfonium halides are made by reacting dimethyl sulfide and a methyl halide in the presence of a solvent mixture which includes water and a water-immiscible organic solvent. The organic water-immiscible solvent is generally present in an amount which is at least 40% but no more than 95% of the total solvent mixture. The reaction is preferably conducted under pressure.

Method to prepare trimethylsulfonium halides

Trimethylsulfonium halides are made by reacting dimethyl sulfide and a methyl halide in the presence of water. The reaction is preferably conducted under pressure.

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Kansas City, MO, United States of America

Jeffrey D Macke