Process for the purification of 2,6-diisopropyl phenol
AssigneeLeiras Oy
InventorsKauko Nieminen, Peter Essen
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Abstract
The object of the invention is a new method for the purification of 2,6-diisopropyl phenol (propofol). The invention is characterized in that the raw product obtained from the alkylation of propene with phenol is crystallized at a temperature where propofol crystallizes but the isomers and other phenol derivatives formed in the reaction are still in liquid form, i.e. at a temperature of -25.degree. to +18.degree. C. especially at -20.degree. to -10.degree. C., without a solvent or using a suitable solvent, such as hexane or petrol ether.
Claims7
A process for the purification of 2,6-diisopropyl phenol, wherein a raw material obtained from an alkylation reaction of propene and phenol, is purified by crystallizing at a temperature range of about -25.degree. to +18.degree. C.
Dependencies are inferred from the claim text.