Inhibition of discoloration of cumene hydroperoxide
AssigneeWitco Corporation
InventorPeter Frenkel
Life of this patent
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Abstract
Discoloration of cumene hydroperoxide is reduced or inhibited by adding to the cumene hydroperoxide an effective amount on the order of 30 to 1000 ppm of a stabilizer of the formula R'C(O)OM wherein R' is alkyl, alkenyl, cycloalkyl or aryl containing 1-40 carbon atoms, or the formula R.sub.4 NOH wherein each R is independently alkyl or cycloalkyl containing 1-40 carbon atoms.
Claims32
A composition comprising cumene hydroperoxide and a color stabilizer selected from the group consisting of
- (a) alkali metal salts of organic acids, having the formula (I)
- R'C(O)OM (I)
- and mixtures thereof, wherein R' is an alkyl, alkenyl, cycloalkyl or aryl group containing 1 to 40 carbon atoms, and M is sodium, potassium, rubidium or cesium;
- and
- (b) quaternary ammonium hydroxides having the formula (II)
- R.sub.4 NOH (II)
- and mixtures thereof, wherein each R is independently an alkyl or cycloalkyl group containing 1 to 40 carbon atoms;
- wherein said stabilizer is present in an amount effective to inhibit discoloration of said cumene hydroperoxide.
A method of treating discolored cumene hydroperoxide so as to reduce said discoloration, comprising adding to said cumene hydroperoxide a color stabilizer selected from the group consisting of
- (a) alkali metal salts of organic acids, having the formula (I)
- R'C(O)OM (I)
- and mixtures thereof, wherein R' is an alkyl, alkenyl, cycloalkyl or aryl group containing 1 to 40 carbon atoms, and M is sodium, potassium, rubidium or cesium;
- and
- (b) quaternary ammonium hydroxides having the formula (II)
- R.sub.4 NOH (II)
- and mixtures thereof, wherein each R is independently an alkyl or cycloalkyl group containing 1 to 40 carbon atoms;
- in an amount of said stabilizer effective to reduce discoloration of said cumene hydroperoxide.
A method of treating cumene hydroperoxide so as to inhibit its discoloration, comprising adding to said cumene hydroperoxide a color stabilizer selected from the group consisting of
- (a) alkali metal salts of organic acids, having the formula (I)
- R'C(O)OM (I)
- and mixtures thereof, wherein R' is an alkyl, alkenyl, cycloalkyl or aryl group containing 1 to 40 carbon atoms, and M is sodium, potassium, rubidium or cesium;
- and
- (b) quaternary ammonium hydroxides having the formula (II)
- R.sub.4 NOH (II)
- and mixtures thereof, wherein each R is independently an alkyl or cycloalkyl group containing 1 to 40 carbon atoms;
- in an amount of said stabilizer effective to inhibit discoloration of said cumene hydroperoxide.
Dependencies are inferred from the claim text.