DEHYDRATION-HYDROLYSIS METHODS AND CATALYSTS THEREFOR Russian patent published in 2019 - IPC C07C51/09 C07C53/08 C07C43/04 C07C41/16 C07C41/09 C01B39/44 B01J29/65 B01J35/02 B01J35/10 B01J37/10 

FIELD: chemistry.

SUBSTANCE: invention describes a method for co-production of acetic acid and dimethyl ether, involving a step of reacting methyl acetate and methanol in the presence of a catalyst containing a crystalline zeolite having a FER-type framework structure, wherein said zeolite contains crystallites having a c-axis size of about 500 nm or less; as well as a method of producing a crystalline zeolite having a FER-type framework structure, wherein said zeolite contains crystallites having a c-axis size of about 500 nm or less, comprising: a) preparing a mixture for synthesis, which includes sources of silicon dioxide, aluminum oxide, alkali metal and a saturated nitrogen-containing heterocyclic compound, said mixture has the following composition in moles

R⁺/(R⁺ + M⁺) 0.2–1.0 OH⁻/SiO₂ 0.05–0.5 H₂O/OH⁻ 41–500 SiO₂/Al₂O₃ 9–200

where R denotes a saturated nitrogen-containing heterocyclic compound and M denotes an alkali metal and where sulfuric acid is not added to the mixture; b) heating said mixture at temperature of 130 °C to 150 °C, for 17 days or longer, while stirring; c) recovering the FER type zeolite; d) removing at least a portion of the saturated nitrogen-containing heterocyclic compound contained in the recovered zeolite of the FER type by heating it at a temperature of about 500 °C to about 600 °C to obtain a calcined zeolite; e) reacting the calcined zeolite with a source of ammonium ions to obtain a zeolite exchanged with ammonium ions; and f) calcining the zeolite exchanged with ammonium ions at a temperature from about 500 °C to about 600 °C, to obtain hydrogen form of FER type zeolite.

EFFECT: disclosed are dehydration-hydrolysis methods and catalysts therefor.

30 cl, 11 dwg, 16 tbl, 9 ex