Celanese International Corporation

Council of Scientific and Industrial Research

Jubliant Organosys Limited

Gopal Moreshwar Chaphekar

Melchior A Meilchen

Prashant Purushottam Barve

Ravindra William Shinde

Ilias S Kotsianis

Milind Yashwant Gupte

Barbara F M Kimmich

Sanjay Pandurang Kamble

Hang Wang

Bhaskar Datttraya Kulkarni

Satish N Shintre

Ashutosh Agarwal

Rajiv Kumar

Pradeep Kumar Verma

Prashant Suresh Niphadkar

Praphulla Narahar Joshi

Kumar Samir Singh

A continuous process is provided for selective formation of a vinyl ester by reactive distillation from a corresponding carboxylic acid. Carboxylic acid, vinyl acetate, and a palladium acetate&#x2014;bidentate ligand catalyst complex are provided and reacted in a typical embodiment. Acetic acid and vinyl acetate are continuously removed from the reaction mixture and vinyl acetate is recycled to the reaction mixture. The vinyl ester product is separated from the vinyl acetate, residual carboxylic acid, residual acetic acid, and catalyst.

Process for the continuous transvinylation of carboxylic acids with vinyl acetate

A semi-continuous process is provided for selective formation of a vinyl ester by reactive distillation from a corresponding carboxylic acid. Carboxylic acid, vinyl acetate, and a palladium acetate&#x2014;bidentate ligand catalyst complex are provided and reacted in a typical embodiment. Acetic acid and vinyl acetate are continuously removed from the reaction mixture and vinyl acetate is recycled to the reaction mixture. The vinyl ester product is separated from the vinyl acetate, residual carboxylic acid, residual acetic acid, and catalyst.

Process for the semi-continuous transvinylation of carboxylic acids with vinyl acetate

An process for the preparation of pyridine and/or picolines is disclosed. The process comprises contacting a mixture of carbonyl compound with ammonia in the presence of surface-passivated titanium-silicate catalyst in gas phase at a temperature ranging between 300-500&#xb0; C., at gas space velocity in the range of 300 to 3000 hand at a pressure ranging between 1 to 10 atmosphere, condensing and separating the products by conventional methods and if desired, further purifying the product using well known conventional methods.

Process for the production of pyridine and picolines

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Pune, India

Gopal Moreshwar Chaphekar