SINTESIS OF 2-HIDROXY-5-ARYLALKYLACETOFENONE ОN THE BASIS OF PRODUCT OF PHENOL REACTION WITH THE COMPONENTS OF FRACTION 130-190 C PIROLYSIS PRODUCTS

Abstract

The results of arylalkylation of phenol with components of fraction 130-190 °C of pyrolysis products in the presence of KU-23 catalyst and the influence of various parameters on the yield and selectivity of the desired product are presented. Optimal conditions for the synthesis of p-aryl-alkylphenol are found. The reaction temperature was varied from 80 to 140 °C, the reaction time was 2 to 8 hours, the molar ratio of phenol to the fraction of 130-190 °C of pyrolysis products was from 1:1 to 1:3 mol/mol, the amount of catalyst from 4 to 15 %. It was found that the interaction of phenol with FLPP in the presence of KU-23 catalyst proceeds with the formation of p-substituted arylalkylphenol. It was determined that the reaction of arylalkylation of phenol with FLPP proceeds mainly with four components of the fraction. Chromatographic studies of FLPP before and after the phenol arylalkylation reaction showed that, mainly (91.5%), unsaturated hydrocarbons enter the reaction (styrene, α-methylstyrene, vinyltoluene, indene). In this case, the concentration of styrene in the FLPP after the reaction decreases from 33.65% to 3.78%, i.e. an obtained p-aryl-alkylphenol consisted of 95.0% p-α-methylbenzylphenol. Insofar as from unsaturated hydrocarbons FLPP mainly consists of 33.65% styrene, 6.15% α-methyl-styrene, 7.02% vinyltoluene, 4.85% indene, the reaction of the alkylation going with them. It is shown that under optimal conditions, the yield of the target p-arylalkylphenol is 74.7% of the theory, and the selectivity is 92.3%. On the basis of p-arylalkylphenol and acetic acid, 2-hydroxy-5-arylalkylacetophenon was synthesized and tested as a photostabilizer of polystyrene. It is shown that under optimal conditions, the yield of the target p-arylalkylphenol is 74.7% of the theory, and the selectivity is 92.3%. Physicochemical parameters of synthesized p-arylalkylphenol and 2-hydroxy-5-arylalkylacetophenone were determined. The use of arylalkylacetophenone as an inhibitor that increases the antioxidant stability of the polystyrene, used under both thermal and solar radiation, is proposed.For citation:Majidov E.A., Chalyshkan M.M., Bagirzade R.Z., Kuliev F.V., Rasulov Ch.K. Sintesis of 2-hidroxy-5-arylalkylacetofenone оn the basis of product of phenol reaction with the components of fraction 130-190 °C pirolysis products. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2017. V. 60. N 7. P. 57-65.