EP 0000460 A1 19790124 - Silver-based catalysts and their use in the preparation of oxide of olefins.
Title (en)
Silver-based catalysts and their use in the preparation of oxide of olefins.
Title (de)
Katalysatoren auf der Basis von Silber und ihre Verwendung zur Herstellung von Olefinoxiden.
Title (fr)
Catalyseurs à base d'argent et leur utilisation pour la production d'oxyde d'oléfines.
Publication
Application
Priority
FR 7721118 A 19770708
Abstract (en)
1. Catalysts based on silver supported on porous artificial graphite or on porous graphite-containing materials, the catalysts being intended for the vapour phase synthesis of epoxides by reaction of an ethylenic hydrocarbon with oxygen or with gaseous mixtures containing oxygen, characterised in that the graphite-type supports have : a specific surface area of less than 10 m**2 /g, a particle size of 50 mu m to 10 mm, a total porosity volume of between 0.1 and 0.4 cm**3 /g, and a porosity distribution which is such that the pores of diameter less than 6.6 mu m represent at most 60% of the total porosity volume if the particle size of the support is greater than 0.7 mm, and at most 90% of the total porosity volume if the particle size of the support is less than or equal to 0.7 mm.
Abstract (fr)
Catalyseurs à base d'argent pour la synthèse en phase vapeur des époxydes par réaction d'oxygène, ou de mélange gazeux en contenant, sur un hydrocarbure éthylénique caractérisé par l'emploi comme support de graphites artificiels poreux, ou de matériaux graphités poreux, présentant une surface spécifique inférieur à 10 m²/g, une granulométrie de 50 microns à 10 mm, un volume total de porosité compris entre 0,1 et 0,4 cm³/g. Procédé de préparation d'oxyde d'éthylène par époxydation utilisant ces catalyseurs.
IPC 1-7
IPC 8 full level
B01J 21/18 (2006.01); B01J 23/50 (2006.01); C07B 61/00 (2006.01); C07D 301/10 (2006.01); B01J 35/02 (2006.01); B01J 35/10 (2006.01)
CPC (source: EP)
B01J 23/50 (2013.01); C07D 301/10 (2013.01); B01J 21/18 (2013.01); B01J 35/40 (2024.01); B01J 35/612 (2024.01); B01J 35/633 (2024.01); B01J 35/66 (2024.01)
Citation (search report)
US 3899445 A 19750812 - KAJIMOTO TSUNESUKE, et al
Designated contracting state (EPC)
BE DE FR GB NL
DOCDB simple family (publication)
EP 0000460 A1 19790124; EP 0000460 B1 19811104; AT 363098 B 19810710; AT A494478 A 19801215; CA 1110610 A 19811013; DE 2861279 D1 19820114; DK 158774 B 19900716; DK 158774 C 19901224; DK 306078 A 19790109; ES 471577 A1 19791001; FR 2396588 A1 19790202; FR 2396588 B1 19830128; IT 1107804 B 19851202; IT 7868356 A0 19780609; JP S5418493 A 19790210; JP S6136978 B2 19860821
DOCDB simple family (application)
EP 78400048 A 19780703; AT 494478 A 19780707; CA 307018 A 19780707; DE 2861279 T 19780703; DK 306078 A 19780707; ES 471577 A 19780707; FR 7721118 A 19770708; IT 6835678 A 19780609; JP 8214978 A 19780707