Monohalogenation of substituted phenol
AssigneePhillips Petroleum Company
InventorsRonald D. Knudsen, Darryl R. Fahey
Life of this patent
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Abstract
Monohalogenated hydrocarbyl substituted phenols can be produced by reacting hydrocarbyl substituted phenols with a halogen carrying out the reaction in a diluent such as benzene, alkyl substituted benzenes, and halosubstituted hydrocarbons of 1-3 carbon atoms.
Claims6
A process for producing a mono-halogenated hydrocarbyl substituted phenol which comprises reacting a hydrocarbyl substituted phenol having the formula ##STR2## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, and R.sup.5 are hydrogen, alkyl, cycloalkyl, or aryl radicals having 1 to 10 carbon atoms with the further provision that at least one of the radicals R.sup.1 to R.sup.5 is a hydrocarbyl radical, wherein at least one of the radicals, R has to be hydrogen,
- with a halogen selected from the group consisting of chlorine, bromine and iodine in the presence of a non-polar diluent selected from the group consisting of benzene, mono-, di- and trialkyl substituted benzenes having 7 to 10 carbon atoms and halosubstituted hydrocarbons having 1 to 3 carbon atoms and 1 to 3 halogen atoms selected from the group consisting of chlorine and/or bromine the mole ratio of halogen to phenol being in the range of 0.5:1 to 1.5:1, and
- separating the monohalohydrocarbyl phenol from the reaction mixture obtained in the reaction step.
Dependencies are inferred from the claim text.