METHOD FOR PRODUCTION OF COMPOSITE THERMOSTABLE CARCASS-TYPE CATALYST FOR DEHYDRATION OF METHANOL INTO DIMETHYL ETHER (VERSIONS) Russian patent published in 2020 - IPC B01J23/00 B01J27/185 B01J23/72 B01J23/755 B01J23/745 B01J21/06 B01J37/04 B01J37/08 C07C41/09 

FIELD: chemistry.

SUBSTANCE: disclosed group of inventions relates to chemistry, a method of producing a composite thermostable carcass-type catalyst for dehydrating methanol to dimethyl ether in an inert atmosphere. Method of producing composite thermostable carcass-type catalyst for dehydration of methanol into dimethyl ether of formula M_0.5Zr₂(PO₄)₃, where M is Ni, Cu, involves mixing citric acid with aqueous solutions of Ni(II) and Zr(IV), or with aqueous solutions of Cu(II) and Zr(IV), adding ethylene glycol and ammonium dihydrogen phosphate, with the following ratio of components, mol%: citric acid – 0.075, Ni(II) or Cu(II) – 0.028, Zr(IV) – 0.114, ethylene glycol – 0.020, ammonium dihydrogen phosphate – 0.171, water – 2–10. Method of producing a composite thermostable carcass-type catalyst for dehydrating methanol into dimethyl ether of general formula M_0.65Fe₀.₃Zr_1.7(PO₄)₃, where M is Ni, Cu, involves mixing citric acid with aqueous solutions of Ni(II), Zr(IV) and Fe(III), or with aqueous solutions of Cu(II), Zr(IV) and Fe(III), adding ethylene glycol and ammonium dihydrogen phosphate, with the following ratio of components , mol%: citric acid – 0.075, Ni(II) or Cu(II) – 0.037, Fe(III) – 0.017, Zr(IV) – 0.096, ethylene glycol – 0.020, ammonium dihydrogen phosphate – 0.170, water – 2–10. Then water is removed by evaporation first at 80–95 °C, then at 120–140 °C, subsequent annealing at 340–360 °C, 590–610 °C, 640–660 °C, 665–675 °C at intermediate dispersion.

EFFECT: increasing at least factor of 2 specific load per 1 g of catalyst while maintaining selectivity of dimethyl ether and conversion of methanol compared to industrial counterparts, high mechanical, thermal and chemical resistance of the catalyst, avoiding the need to use carriers/substrates.

2 cl, 1 dwg, 5 tbl, 4 ex