PROCESS FOR THE EPOXIDATION OF OLEFINS WITH A FLUORINE-PROMOTED SILVER CATALYST, WHICH SHOWS ENHANCED THERMAL STABILITY UNDER REACTION CONDITIONS

摘要

Method prepares monoepoxide, the alkene is selected from norbornene, norbornadiene and alkene have the compound of general formula (I), wherein R1 is hydrogen or R2 aryl, it is that R1 not methods of the hydrogen atoms in allyl and ethylenic bond degree of unsaturation that tertiary alkyl groups or the group, which have formula (a) condition, it is being supported including contacting alkene with oxygen-containing gas, fluorine promotes, silver catalyst forms pressure and temperature condition in epoxides, wherein the catalyst substantially has the silver 0. of distribution on the surface thereof with surface area by catalyst carrier material less than 10 square metres every gram1 to 50 weight %, 10 to 5000 a few millionths fluorine and it is a certain amount of cation be selected from consisting of the following group: the identical weight range of thallium, alkali and alkaline earth metal ions be measure fluorine.