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US 5,315,049 AGranted
Process for the nuclear chlorination of aromatic hydrocarbons
AssigneeBayer Aktiengesellschaft
InventorsHeinrich Schrage, Helmut Fiege
Life of this patent
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Abstract
Alkylaromatics are subjected to nuclear chlorination in the liquid phase in the presence of Friedel-Crafts catalyst mixtures comprising compounds of iron and antimony and cocatalysts of the formula (II) ##STR1## wherein the substituents have the meaning given in the description.
Claims9
A process for the nuclear chlorination of an aromatic hydrocarbon of the formula (I) ##STR4## in which R denotes a C.sub.1 -C.sub.12 -alkyl radical or C.sub.3 -C.sub.8 -cycloalkyl radical,
- in the presence of a mixture of Friedel-Crafts catalysts and in the presence of cocatalysts and in the liquid phase, comprising employing a Friedel-Crafts catalyst which is a mixture of at least one antimony compound and at least one iron compound and a cocatalyst which is at least one compound having a polyether structure of the formula (II) ##STR5## in which R.sub.1 and R.sub.2 independently of one another in each case represent hydrogen, a C.sub.1 -C.sub.18 -alkyl radical or C.sub.3 -C.sub.8 -cycloalkyl radical, or R.sub.1 and R.sub.2 together represent the radical of a cyclising alkylene group,
- R.sub.3 denotes hydrogen, methyl or ethyl and x denotes a number from 1 to 500.
Dependencies are inferred from the claim text.