GLYOXAL PRODUCTION CATALYST

FIELD: catalysts for organic syntheses. SUBSTANCE: glyoxal is produced by vapor-phase oxidation of ethylene glycol over two-bed catalyst adding, as stabilizing additive, phosphoric acid hexamethyltriamide to gas-vapor mixture in quantity 10 to 50 ppm (on phosphorus base). Granulated silver catalyst...

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Bibliographische Detailangaben
Hauptverfasser:	ROZANOV I.G, BALAKIN V.M, PETROV L.A, ALEKHIN A.V, KOLPAKOV S.N, SHEVCHUK S.A, SHAMIN A.A
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY METALLURGY ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	FIELD: catalysts for organic syntheses. SUBSTANCE: glyoxal is produced by vapor-phase oxidation of ethylene glycol over two-bed catalyst adding, as stabilizing additive, phosphoric acid hexamethyltriamide to gas-vapor mixture in quantity 10 to 50 ppm (on phosphorus base). Granulated silver catalyst prepared on the base of fibrous crystalline dendrite porous-structure silver is used. Catalyst bed is formed by layerwise placement of silver granules, their size increasing in direction of reaction gas mixture flow. EFFECT: increased yield of desired product due to increased conversion and process selectivity while simultaneously simplifying catalyst bed formation process, increasing duration of smooth operation of catalyst and reduced silver consumption.