Haloethylation of aromatic hydrocarbons

Details Haloethylation of aromatic hydrocarbons Haloethylation of aromatic hydrocarbons

C - Chemistry, Metallurgy

07

C

260/653.4

C07C 17/14 (2006.01) C07C 17/32 (2006.01) C07C 22/04 (2006.01)

Patent

CA 2025737

A monoalkylaromatic hydrocarbon is haloethylated to a 1-halo-1-arylethane with minimal co-formation of diarylalkane and acetaldehyde by-products by reacting it with hydrogen chloride or bromide and a stoichiometric deficit of acetaldehyde in the presence of sulfuric acid in an amount such as to provide at least two mols of hydrogen sulfate per mol of acetaldehyde and less than 1.5 mols of hydrogen sulfate per mol of the monoalkylaromatic hydrocarbon.

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