METHOD OF PRODUCTION OF CATALYST FOR SYNTHESIS OF METHANOL FROM SYNTHESIS GAS AT LOW PRESSURE Russian patent published in 2024 - IPC B01J37/00 B01J37/04 D01F8/08 B01J37/34 D01D5/00 D04H3/00 B01J23/00 B01J23/80 B01J37/08 B01J35/60 C07C31/04 

FIELD: producing catalyst for synthesis of methanol.

SUBSTANCE: invention relates to a method for producing a catalyst for the synthesis of methanol from synthesis gas at low pressure. A method for the production of a methanol synthesis catalyst is described, in which two polymer molding solutions are prepared, from which a precursor nonwoven composite material is obtained by coaxial electroforming, which is converted by thermolysis into a nanostructured catalyst for the synthesis of methanol from synthesis gas. In this case, the first molding solution is prepared by dissolving the polyacrylonitrile polymer in dimethyl sulfoxide, where the mass fraction of polyacrylonitrile is 12%. The second molding solution is prepared by dissolving polyacrylonitrile in dimethyl sulfoxide, where the mass fraction of polyacrylonitrile is 10%, after which anhydrous salts of copper, zinc and aluminum are dissolved in the resulting mixture, as well as additives of salts of other metals that do not form insoluble complexes with dimethyl sulfoxide. For to obtain a non-woven composite material, the prepared first and second solutions are fed into a coaxial needle, with the first solution being fed into the inner needle of the coaxial needle, and the second solution into the outer one. A potential difference of 45 to 55 kV and an interelectrode distance of 30 to 60 cm are set between the coaxial needle and the collector electrode, which is a rotating metal cylinder. The process of coaxial electroforming is carried out to obtain polymer-composite coaxial fibers assembled by winding onto a rotating metal cylinder of a collector electrode. Polymer-composite coaxial fibers obtained after the end of the process of coaxial electroforming and drying at a temperature of 105 °C are separated in the form of a non-woven rolled mat, a precursor to a non-woven composite material. Then the precursor is stabilized non-woven composite material, keeping it at a temperature of 230 to 260 °C in the air. Then, the precursor nonwoven composite material is heat treated in an oxygen-free environment with a getter material or in an inert gas environment at a temperature of 600 to 900 °C for at least 3 hours to obtain a nanostructured fibrous carbonized material. The resulting nanostructured fibrous carbonized material is activated in a current of hydrogen gas in a tubular furnace at a temperature of 240 °C for 4 hours.

EFFECT: technical result is an increase in the area of the catalytic surface.

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