Occidental Chemical Corporation

Daniel R Thielen

Michael J Fifolt

Ronald F Spohn

William S Derwin

Michael C Savidakis

David C Johnson

Dean R Lagerwall

Pravin M Khandare

Mark F Lechner

A method of making a benzoyl halide is disclosed. Into a reactor is placed a reaction mixture of a benzotrihalide and a benzaldehyde having the respective general formulas

Method of making benzoyl halides and nitriles

Disclosed is a method of isolating the aromatic product formed when a substrate having the general formula

Isolation of products from selective dehalogenation of haloaromatics

Disclosed is a method of removing about 0.05 to about 20 mole % of a benzaldehyde or benzotrihalide from a mixture with a liquid compound that boils within about &minus;10 to about &plusmn;5&deg; C. of the boiling point of the benzaldehyde or benzotrihalide. To the mixture is added a benzotrihalide in an amount about stoichiometric to about 10 mole % in excess of stoichiometric, or, respectively, a benzaldehyde in an amount about stoichiometric with the amount of said benzotrihalide, where said benzaldehyde and said benzotrichloride react to form a benzalhalide and a benzoylhalide. The product mixture is distilled to isolate the products.

Method of reducing benzaldehyde or benzotrihalide content in a mixture

Disclosed is a method of adding 1 to 4 chlorine or bromine atoms to an aromatic ring of compound that has at least one electron-withdrawing groups on that ring. The aromatic compound is reacted with a chlorinating agent or a brominating agent in the presence of about 0.1 to about 10 mole % of a Lewis acid catalyst and about 0.001 to about 0.1 equivalents of an iodine-containing cocatalyst at a temperature of ambient to about 100.degree. C.

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Synder, NY, United States of America

Daniel R Thielen