Haloethylation of aromatic hydrocarbons

Details Haloethylation of aromatic hydrocarbons Haloethylation of aromatic hydrocarbons

1989-08-17

1991-03-19

Shippen, Michael L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Halogen containing

558342, 562496, C07C 1700

Patent

active

050012886

ABSTRACT:
A monoalkylaromatic hydrocarbon is haloethylated to a 1-halo-1-arylethane with minimal co-formation of diarylalkane by-product by reacting it with hydrogen chloride or bromide and acetaldehyde at a temperature in the range of abaout +10.degree. C. to about -35.degree. C. in the presence of at least about 1.4 mols of hydrogen sulfate per mol of the aromatic hydrocarbon and in the absence of more than about 15% by weight of water, based on the weight of the hydrogen sulfate; the temperature being not higher than about -10.degree. C. when hydrogen chloride is employed.

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