METHOD OF PRODUCING DIMETHYL ETHER (VERSIONS) Russian patent published in 2019 - IPC C07C41/09 C07C43/04 B01J27/18 B01J27/185 

FIELD: chemistry.

SUBSTANCE: present invention relates to two versions of a method of producing dimethyl ether from methanol. Both the first and second versions of the method include dehydration of methanol in the vapor phase on a thermostable composite catalyst of composition M_0.5Zr₂(PO₄)₃ in a tubular reactor, which is placed in amount of 0.3 grams in a mixture with pure quartz sand between two sections of pure quartz sand, activating catalyst at 350 °C in argon and hydrogen flow for 3 hours, wherein methanol vapor cooled to 2 °C is introduced into reactor by current of argon and dehydration is carried out at 200–400 °C. In the first version of the method, the catalyst used is a catalyst of composition Ni_0.5Zr₂(PO₄)₃ or Cu_0.5Zr₂(PO₄)_3, and in second version catalyst composition of Ni_0.65Fe_0.3Zr_1.7(PO₄)₃ or Cu_0.65Fe_0.3Zr_1.7(PO₄)_3.

EFFECT: proposed versions of the method enable to obtain dimethyl ether with high output with degree of conversion of methanol and selectivity to dimethyl ether, comparable with those of industrial analogues.

2 cl, 10 dwg, 4 ex