APPLICATION OF NATURAL MODIFIED CLINOPTILOLITE AS A CATALYST FOR THE PROCESS OF METHANOL CONVERSION

The purpose of this work was to study the catalytic activity for the conversion of methanol into formaldehyde, dimethyl ether, methyl formate, dimethoxymethanane of zeolite catalysts - based on natural clinoptilolite and its modified Co2+, Cu2+, Mo2+, Cr2+ forms (Cl-X). The yield was 14.3% in the naturalclinoptilolite, 27.8% in the Co2+-modified sample, and 37.3% in the Cu2+-modified sample, correspondingly. The introduction of relatively small amounts of Co2+ and Cu2+ cations into the catalyst led to an increase in the activity of the catalysts. The effect of partial pressure of CH3OH on the yield of DME was studied (maximum yield of 37.3%, mol. DME is achieved at the ratio CH3OH:O2 = 3:1). The decrease in the reaction temperature from 523 to 423 K led to an increase in the yield of DMM, and the formation of dimethyl ether and methyl formate increased with an increase in temperature to 623 K