用于过氧化氢异丙苯分解反应的沸石催化剂失活与再生的研究

摘要 本文主要分析了改性 俘沸石催化剂失活的原因并考察其再生方法 。研究表明 ,钠的毒化作用可经水洗过氧化氢异丙苯 而抑制。程序升温氧化 表明改性 日沸石催化剂上的积碳量较少。色质联用分析表明,改性月沸石催化剂上的积炭物质主要是对甲乙苯、枯酚及二元梭酸醋等。这些物质是由于苯酚聚合或苯酚与副产物发生副反应而产生 的。第一次再生后的催化剂活性和单程寿命虽有一定程度的下降,但在后续再生后,催化剂活性和单程寿命基本稳定。

Deactivation and regeneration of zeolite catalysts for decomposition of cumene hydroperoxide

The cause for deactivation of modified β-zeolite catalyst and the way for its regeneration were investigated. It was shown that the poisoning effects of Na₂O can be suppressed by water Washing of CHP.Temperature-programmed oxidation（TPO) showed that amount of coke in deactivated catalyst is very small.GC-MS analysis indicated that the coke is mainly composed of p-methyl ethyl benzene，cumene phenol and benzenedicarboxylic acid ester. The deactivation may be caused by phenol polymerization and side reactions between phenol and by-products.Single-pass life of the catalyst was declined by 60% after the first regeneration and tended to keep stable after several times of regeneration.