METHOD OF EVALUATING ACTIVITY OF ZEOLITE CATALYST FOR ALKYLATING ISOBUTANE WITH BUTENES Russian patent published in 2020 - IPC C07C2/58 B01J29/08 G01N30/00 G01N15/00 

FIELD: chemistry.

SUBSTANCE: invention relates to physical and chemical analysis and can be used to select an isobutane alkylation catalyst for butenes. Disclosed is a method of assessing activity of a zeolite alkylation catalyst of isobutane with butylene, including determining its texture characteristics by low-temperature adsorption-desorption of nitrogen - specific surface area, total volume of pores and volumes of micro- and mesopores, calculation of catalytic properties of catalyst - conversion of butylene (X) based on equation: X=5.848+0.061S_sp−0.000087S_sp²−0.038S_spV_tot+619.739V_tot−1177.681V_tot²+0.001V_totN+1.45N−0.379N²+4.17S_spN (1) output of alkylate to butylene (Y) based on equation: Y=13.558+0.146S_sp−0.00019S_sp²−0.152S_spV_tot+1220.119V_tot−2310.923V_tot²+0.004V_totN+3.232N−0.991N²+13.653S_spN (2) selectivity on trimethyl pentanes (S) based on the equation: S = −25.104+0.039S_sp−0.000058S_sp²−0.006S_spV_tot+659.826V_tot−1250.767V_tot²+2.679N−0.405N²+1.624S_spN (3), in which S_sp is specific surface area, m²/g; V_tot is total volume of pores, m³/g, and N is ratio of volumes of micro- and mesopores, and selection of that catalyst sample, which meets design parameters: X is more than 95 wt. %, Y is more than 195 wt. % and S are not lower than 70 wt. %.

EFFECT: possibility of evaluating catalytic activity of a sample of a zeolite catalyst for alkylation of isobutane with butenes from the viewpoint of converting butylene, alkylate output and selectivity (content in trimethylpentane alkylate) without carrying out the alkylation process itself.

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