EFFECT OF TREATMENT WITH CARBON DIOXIDE OF THE Zn FORM OF THE TsVK ZEOLITE ON ITS ACID AND CATALYTIC PROPERTIES IN THE CONVERSION OF METHANOL TO HYDROCARBONS

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Abstract

It is shown that it is possible to increase the yield of liquid hydrocarbons of the benzene fraction in the Mobil process by use of a catalyst modified by treatment with CO2 of the Zn form of the TsVK zeolite. It is established that on treatment with CO2 of the Zn-TzVK zeolite the concentration of strongly acidic α-centers is increased. As a result of alkylation of C2-C4 olefins by methanol at these sites more of the high molecular C5-C8 aliphatic hydrocarbons are formed. Selectivity of conversion of methanol to liquid C5-C10 hydrocarbons of the benzene fraction is increased, but selectivity with respect to the light C2-C4 fractions is decreased.

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