METHOD OF PRODUCING Ag/SiO₂ CATALYST FOR HETEROGENEOUS CATALYSIS OF MOLECULAR HYDROGEN IN PROTIUM-DEUTERIUM ISOTOPIC EXCHANGE REACTIONS AND ORTHO-PARA CONVERSION OF PROTIUM

摘要

FIELD: chemistry.;SUBSTANCE: invention relates to heterogeneous catalysis, particularly a method of producing a catalyst for protium-deuterium isotopic exchange and ortho-para conversion of protium. Disclosed is a method of producing a Ag/SiO₂ catalyst for heterogeneous catalysis of molecular hydrogen in form of a protium-deuterium isotopic exchange reaction or ortho-para conversion of protium. The method involves obtaining silver nanoparticles via radiation-chemical reduction of silver ions from a reverse micellar solution of silver and depositing the obtained silver nanoparticles onto a SiO₂ support which is immersed into the solution, wherein silver ions are reduced from a reverse micellar solution of silver which is prepared by adding 0.003-2.0 M AgNO₃ aqueous solution to 0.02-0.5 M solution of sodium bis(2-ethylhexyl)sulphosuccinate in a nonpolar solvent - isooctane and treating the obtained solution with ultrasound until formation of a reverse micellar dispersion, followed by deaeration thereof to a suspension which is exposed to γ-radiation of ⁶⁰Co with a dose of 5-30 kGy.;EFFECT: catalyst is meant for operation at temperatures maximally close to liquefaction temperatures of protium and deuterium.;1 dwg, 5 tbl, 4 ex