A method for preparing 2,6 ditert.butylphenol which comprises alkylation of phenol in {HEAD ~ the presence} of monotert butylphenol and a catalyst, viz. aluminium dissolved in phenol with gradually lowering the process temperature from 120° to 50° C and reducing the concentration of isobutylene in the mixture of isomeric butenes from {TAIL ~ 80 to 1.5 mol.%}, followed by isolation of the desired product 
A method for preparing 2,6 ditert.butylphenol which comprises alkylation of phenol in { HEAD ~ the presence } of monotert butylphenol and a catalyst , viz . aluminium dissolved in phenol with gradually lowering the process temperature from 120 ° to 50 ° C and reducing the concentration of isobutylene in the mixture of isomeric butenes from { TAIL ~ 80 to 1.5 mol.% } , followed by isolation of the desired product
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