９９０６１５抗金属污染和焦堵塞的催化裂化催化剂——包括在沸石颗粒表面涂上一层预先制成的无机氧化物，最好是铝的氧化物／［英］＝ＥＰ７６２９３５－Ｂ１．ＡＫＺＯＮＯＢＥＬＮＶ．一种包括沸石颗粒的催化裂化催化剂，至少５０％的外表面被覆盖上一层预先制成的无机氧化 990615 Anti-fouling and coke-plugging of catalytic cracking catalysts - including the coating of zeolite particles with a layer of pre-formed inorganic oxide, preferably aluminum oxide / oxide = EP762935-B1. AKZONOBELNV. A catalytic cracking catalyst comprising zeolite particles, at least 50% of the outer surface being coated with a layer of a preformed inorganic oxide