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    • 1. 发明授权
    • Process for producing pentacyl-type crystalline zeolites and a process for producing &egr;-caprolactam using the same
    • 制备戊酰基型结晶沸石的方法和使用该方法制备ε-己内酰胺的方法
    • US06303099B1
    • 2001-10-16
    • US09605473
    • 2000-06-28
    • Hiroshi IchihashiKeisuke SugitaMakoto Yako
    • Hiroshi IchihashiKeisuke SugitaMakoto Yako
    • C01B3936
    • C01B39/40B01J29/40C07D201/04Y02P20/52Y10S423/22Y10S423/29Y10S423/34
    • A process for producing a pentacyl-type crystalline zeolite is provided which comprises the steps of (i) preparing a mixture of a silicon compound, water and tetrapropyl ammonium hydroxide, (ii) conducting a hydrothermal reaction of the mixture to obtain a reaction mixture containing zeolite crystals, (iii) separating zeolite crystals from the reaction mixture to collect a remaining solution, (iv) calcinating the resulting zeolite crystals, (v) treating the calcinated zeolite crystals with a solution such as ammonia water and (vi) recycling the solution collected in step (iii) to step (i), wherein in the mixture prepared in step (i) a molar ratio of hydroxide ion to silicon is from about 0.1 to about 0.4 and a molar ratio of potassium to silicon is about 0.1 or less. With this process, a zeolite catalyst having good performance can be produced with good reproducibility.
    • 提供了一种制备五酰基型结晶沸石的方法,其包括以下步骤:(i)制备硅化合物,水和四丙基氢氧化铵的混合物,(ii)进行混合物的水热反应,得到含有 沸石晶体,(iii)从反应混合物中分离沸石晶体以收集剩余溶液,(iv)煅烧所得沸石晶体,(v)用溶液如氨水处理煅烧的沸石晶体,和(vi)回收溶液 在步骤(iii)至步骤(i)中收集,其中在步骤(i)中制备的混合物中,氢氧根离子与硅的摩尔比为约0.1至约0.4,并且钾与硅的摩尔比为约0.1或更小 。 通过该方法,可以以良好的再现性制造具有良好性能的沸石催化剂。