Catalyst of reducing-dehydrating type for synthesizing vinylaromatic compounds and method of preparing it

Abstract

Abstract A reducing-dehydrating catalyst for synthesizing vinylaromatic compounds from aromatic carbonylic compounds, consisting mainly of 5 - 50 per cent by weight of magnesium sulfate and 50 - 95 per cent by weight of zinc oxide. The catalyst can also contain magnesium oxide, in which case the composition of the catalyst is as follows: MgSO4 5 - 20 per cent by weight, ZnO 45 - 88 per cent by weight and MgO 2 - 45 per cent by weight. The catalyst can contain also an additive of a hydroxide of an alkali metal taken in the amount from 0.05 to 1 per cent of the total weight of the catalyst. The catalyst is prepared by mixing an aqueous solution of magnesium sulfate and a suspension of zinc oxide, with subsequent evaporation of the reaction mixture, drying the prepared product and calcining it at a temperature from 250* to 400*C. The catalyst of the invention can be used for synthesizing divinylbenzenes from diacetylbenzenes, styrene from acetophenone, ethylvinylbenzene from ethylacetophenone and other vinylaromatic compounds by a single-step process, the yields and the purity of the final products being high.

Inventors

• 👤 Khachik Egorovich Khcheyan
• 👤 Ninel Iosifovna Yakovich
• 👤 Larisa Borisovna Kotelnikova
• 👤 Alexei Fedorovich Pavlichev
• 👤 Nina Nikolaevna Zhilnina

Bibliographic Details