METAL-ORGANIC COORDINATION POLYMER FOR ACCUMULATING NATURAL GAS, METHANE AND METHOD FOR PRODUCTION THEREOF Russian patent published in 2022 - IPC C07F5/06 C07C51/41 C08G83/00 B01J20/22 B01J20/30 

FIELD: polymers.

SUBSTANCE: invention relates to a method for producing a metal-organic coordination polymer for accumulating natural gas, methane. Method includes the stage of synthesis, consisting of an interaction of equimolar quantities of aluminium nitrate crystalline hydrate and trimesic acid dissolved in an aprotic polar organic solvent with a boiling point above 80 °C, taken in an amount equimolar or excess to the reagents, wherein the aluminium nitrate crystalline hydrate solution is heated to a temperature of 110 °C; the trimesic acid solution is heated to a temperature of 80 to 110 °C; the heated trimesic acid solution is added to the heated aluminium nitrate solution drop by drop while stirring intensively, at a rate of 5 to 15% vol. per minute; the mixture of solutions is heated to a temperature of 140 °C, held until sol is formed; said sol is polymerised at 100 to 150 °C for 2 to 3 days until a metal-organic coordination polymer with a gel structure is formed, and the activation stage consisting of repeated washing of the synthesised metal-organic coordination polymer with a gel structure under conditions of a vacuum with a pressure drop of at least 90 kPa with an aprotic polar organic solvent used at the stage of synthesis, heated to a temperature of 40 to 60 °C; drying for up to 24 hours first under standard conditions, then at a temperature of 100 to 150 °C, followed by thermal evacuation for up to 6 hours at a temperature of 120 to 300 °C and a residual pressure up to 0.26 kPa. Said activation stage ends when the mass of the metal-organic coordination polymer with a gel structure is stabilised. Also proposed is a metal-organic coordination polymer for accumulating natural gas, methane.

EFFECT: possibility of reducing the material consumption of the process by using the same solvent at the stages of synthesis and activation, shortening the time of production of a polymer gel characterised by the presence of active meso- and micropores, allow the gel to be applied as a base in various adsorption processes, including those in natural gas storage systems.

2 cl, 6 dwg, 2 tbl, 5 ex