Abstract

Various zeolites for preparing an active heterogeneous catalyst for the commercial alkylate production process were studied. NaX zeolites produced by Russian catalyst plants (powdered, granulated without binders, and formed with binders) were used in the experiments. The zeolites were converted to the active form by successive ion exchange with aqueous solutions of calcium, lanthanum, and ammonium salts at 140°C in a rotating autoclave. Isobutane alkylation with butylenes was performed on a flow-through laboratory installation in a fixed-catalyst-bed reactor. Comparative analysis of the physicochemical (crystal structure, acidity, mechanical strength) and catalytic (conversion of butylenes, alkylate yield, selectivity) properties of the synthesized catalysts in the CaLaHX form was performed. With respect to the set of the properties, the sample based on the NaX-ch catalyst and formed with a binder (clay) is the best catalyst. It exhibits good strength, high acidity, and high activity (conversion of butylenes 100 wt % , alkylate yields based on butylenes in the feed 99 wt % , selectivity with respect to trimethylpentanes 77.1 wt % ).

中文翻译：

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CaLaHX形式的各种NaX沸石在催化剂上异丁烷与丁烯的烷基化

摘要

研究了用于工业化烷基化物生产过程的制备活性多相催化剂的各种沸石。实验中使用了俄罗斯催化剂工厂生产的NaX沸石（粉状，不使用粘合剂制粒，并使用粘合剂形成）。通过在旋转高压釜中在140℃下与钙，镧和铵盐的水溶液进行连续的离子交换，将沸石转化为活性形式。异丁烷与丁烯的烷基化反应是在固定式催化剂床反应器中的流通式实验室设备上进行的。进行了CaLaHX形式的合成催化剂的理化性质（晶体结构，酸度，机械强度）和催化性质（丁烯转化率，烷基化物收率，选择性）的比较分析。关于属性集，基于NaX-ch催化剂并与粘合剂（粘土）形成的样品是最好的催化剂。它表现出良好的强度，高酸度和高活性（丁烯的转化率为100 wt％，基于进料中丁烯的烷基化物收率为99 wt％，相对于三甲基戊烷的选择性为77.1 wt％）。