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    • 4. 发明授权
    • Process for making ethylene and propylene
    • 制备乙烯和丙烯的方法
    • US06518475B2
    • 2003-02-11
    • US09785409
    • 2001-02-16
    • Shun C. FungChunshe CaoTeng Xu
    • Shun C. FungChunshe CaoTeng Xu
    • C07C100
    • C07C1/20C07C2529/85Y02P20/52Y02P20/584Y02P30/42Y10S585/904C07C11/04C07C11/06
    • A process for increasing the ethylene selectivity of a silicoaluminophosphate molecular sieve catalyst by using acetone in an oxygenate conversion process. Acetone can be added with the oxygenate feed at a concentration from about 1% to about 15% by weight, preferably about 1% to about 8% by weight, more preferably about 2% to about 5% by weight. Alternatively, acetone can be added as a pre-feed to the molecular sieve catalyst, particularly regenerated and fresh catalyst, in an contact zone. The pre-feed contacted catalyst is then directed to an oxygenate conversion zone. The acetone concentration in the pre-feed is from about 1% to about 99% by weight, preferably about 30% to about 70% by weight.
    • 一种通过在含氧化合物转化方法中使用丙酮来提高硅铝磷酸盐分子筛催化剂的乙烯选择性的方法。 丙酮可以以约1%至约15%重量,优选约1%至约8%重量,更优选约2%至约5%重量的浓度加入含氧化合物进料。 或者,可以在接触区中将丙酮作为预进料加入到分子筛催化剂,特别是再生和新鲜的催化剂中。 然后将预进料接触的催化剂导入含氧化合物转化区。 预进料中的丙酮浓度为约1重量%至约99重量%,优选约30重量%至约70重量%。