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    • 3. 发明公开
    • 톨루엔 메틸화 방법
    • 使用特定的启动条件的TOLENENE甲基化方法,其生产P-SYLENE并实现稳定的催化活性
    • KR1020050016057A
    • 2005-02-21
    • KR1020040060238
    • 2004-07-30
    • 사우디 베이식 인더스트리즈 코포레이션
    • 고쉬아쉼쿠마르하비파멜라
    • C07C2/66
    • C07C2/864C07C2529/40Y02P20/52C07C15/08
    • PURPOSE: A toluene methylation method is provided to produce p-xylene with high selectivity and to achieve stable catalytic activity over extended periods by utilizing specific start-up conditions. CONSTITUTION: The method of preparing a xylene product comprises the steps of: providing a reactor containing a phosphorus-treated ZSM-5-type zeolite catalyst; initiating start-up of a toluene methylation reaction by contacting the catalyst with a toluene/methanol feed and a hydrogen cofeed introduced into the reactor at start-up conditions, wherein the toluene/methanol feed is introduced into the reactor at a liquid hourly space velocity(LHSV) of about 2hr¬-1 or more and the hydrogen cofeed is introduced into the reactor at a hydrogen/hydrocarbon(H2/HC) mole ratio of about 8 or less, the temperature is about 500 to 700deg.C; operating the reactor at the start-up conditions for about 30 minutes to about 20 hours; and then operating the reactor at run conditions, wherein the LHSV is 10 hr-1 or less and H2/HC mole ratio is at least 1.0 and the temperature is about 500 to 700deg.C.
    • 目的:提供甲苯甲基化方法以高选择性生产对二甲苯,并通过利用特定的启动条件在长时间内实现稳定的催化活性。 构成:制备二甲苯产物的方法包括以下步骤:提供含有磷处理的ZSM-5型沸石催化剂的反应器; 通过使催化剂与甲苯/甲醇进料和在启动条件下引入反应器的氢共进料接触来引发甲苯甲基化反应的启动,其中将甲苯/甲醇进料以液时空速引入反应器 (LHSV)为约2hr -1或更大,氢共进料以约8或更低的氢/烃(H 2 / HC)摩尔比引入反应器中,温度为约500-700℃; 在启动条件下操作反应器约30分钟至约20小时; 然后在运行条件下操作反应器,其中LHSV为10hr-1或更低,H 2 / HC摩尔比为至少1.0,温度为约500-700℃。