申请人:GENERAL ELECTRIC COMPANY
公开号:EP0867428A1
公开(公告)日:1998-09-30
Hydroxyaromatic compounds such as phenol are converted to diaryl carbonates by reaction with oxygen and carbon monoxide in the presence of a catalyst package which comprises a Group VIIIB metal, preferably palladium, salt of at least one aliphatic β-diketone such as 2,4-pentanedione. The catalyst package also preferably comprises an inorganic cocatalyst, an organic cocatalyst and a bromide or chloride, preferably bromide, source such as a hexaalkylguanidinium bromide. The use of the β-diketone salt confers such advantages as long shelf life under normal storage conditions, high activity upon recycle and capability of carbonylation at relatively low temperatures.
苯酚等羟基芳香族化合物在催化剂包的存在下与氧气和一氧化碳反应转化为二芳基碳酸酯,催化剂包包括至少一种脂族 β-二酮(如 2,4-戊二酮)的 VIIIB 族金属(最好是钯)盐。催化剂包最好还包括无机助催化剂、有机助催化剂和溴源或氯源,最好是溴源,如六烷基溴化胍。使用 β-二酮盐具有在正常储存条件下保质期长、循环使用时活性高以及可在相对较低的温度下进行羰基化反应等优点。