{HEAD ~ A method} for preparing {TAIL ~ 2,6 ditert.butylphenol} which comprises alkylation of phenol in 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 80 to 1.5 mol.%, followed by isolation of the desired product 
for preparing
{ HEAD ~ A method } for preparing { TAIL ~ 2,6 ditert.butylphenol } which comprises alkylation of phenol in 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 80 to 1.5 mol.% , followed by isolation of the desired product
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