ALKYLATION OF ETHYLBENZENE BY ETHANOLE ON H-ULTRASIL ZEOLITE CATALYST, MODIFIED BY LANTANUM
Journal: Azerbaijan Chemical Journal (Vol.0, No. 3)Publication Date: 2018-09-28
Authors : T.O.Gakhramanov S.E.Mammadov E.I.Akhmedov;
Page : 74-79
Keywords : H-ultrasil; zeolite; modification; p-selectivity; lanthanum; ethylation; ethylbenzene; ethanol;
Abstract
The modified H-ultrasil zeolite maintained high crystallinity and high specific surface areas precursors testified by XRD, BET and NH3-TPD analysis. Effect of lanthanum concentration on the adsorptive, acidic and catalytic properties of H-ultrasil in the ethylbenzene ethylation reaction was investigated. In-fluence of modifying on catalytic properties of H-ultrasil zeolite is studied in a 300–4000C temperature interval. Under these conditions, selectivity of p-diethylbenzene in H-ultrasil is 42.1-44.4%. It is estab-lished that increasing concentration of lanthanum on H-ultrasil makes reduction of porous volume, es-sential decrease in concentration of the strong acid centers that in turn leads to increase selectivity on p-diethylbenzene. By the increase in concentration of lanthanum in H-ultrasil to 5.0 wt. % selectivity on p-diethylbenzene increases to 74.5%
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