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OALib Journal期刊
ISSN: 2333-9721
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cunay分子筛的制备及其催化甲醇氧化羰基化
, PP. 1361-1366
Keywords: 离子交换,cunay催化剂,氧化羰基化,甲醇,铜氨溶液,碳酸二甲酯
Abstract:
？采用多种铜盐溶液与nay分子筛离子交换制备了cunay催化剂,通过加入氨水提高溶液ph值以及高温活化,显著提高了该催化剂对甲醇氧化羰基化合成碳酸二甲酯的反应活性。不同的铜盐水溶液交换制备的cunay催化剂催化活性不同,添加氨水将溶液ph值调节为11后,离子交换制备的cunay催化剂的催化活性和dmc选择性明显升高且趋于一致。经元素分析、xrd、xps和h2-tpr表征可知,加入氨水可促进cu2+离子交换的进行,提高cunay催化剂中cu的交换量,催化剂中约75%的cu2+定位于分子筛的超笼中。
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