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    • 6. 发明授权
    • Process for producing high purity isoolefins and dimers thereof by
dissociation of ethers
    • 通过醚解离生产高纯度异烯烃及其二聚体的方法
    • US4447668A
    • 1984-05-08
    • US496983
    • 1983-05-25
    • Lawrence A. Smith, Jr.Edward M. Jones, Jr.Dennis Hearn
    • Lawrence A. Smith, Jr.Edward M. Jones, Jr.Dennis Hearn
    • C07C1/20C07C2/28C07C11/02C07C1/00
    • C07C11/02C07C1/20C07C2/28C07C2531/08Y02P20/127
    • Alkyl tertiary butyl ether or alkyl tertiary amyl ether is dissociated by vapor phase contact with a cation acidic exchange resin at temperatures in the range of 150.degree. to 250.degree. F. at LHSV of 0.1 to 20 to produce a stream consisting of unreacted ether, isobutene or isoamylene and an alcohol corresponding to the alkyl radical. After the alcohol is removed, the ether/isoolefin stream may be fractionated to obtain a high purity isoolefin (99+%) or the ether/isoolefin stream can be contacted in liquid phase with a cation acidic exchange resin to selectively dimerize the isoolefin in a highly exothermic reaction, followed by fractionation of the dimerization product to produce high purity diisoolefin (97+%). In the case where the alkyl is C.sub.3 to C.sub.6 and the corresponding alcohol is produced on dissociation of the ether, combined dissociation-distillation may be carried out such that isoolefin is the overhead product and alcohol the bottom.
    • 烷基叔丁基醚或烷基叔戊基醚通过与阳离子酸性交换树脂在150至250°F的温度下以0.1至20的LHSV气相接触而解离,以产生由未反应的醚,异丁烯 或异戊烯和对应于烷基的醇。 在除去醇之后,可以分离乙醚/异烯烃流以获得高纯度异烯烃(99 +%),或者乙醚/异烯烃流可以与阳离子酸性交换树脂液相接触,以选择性地使异烯烃二聚 高度放热反应,然后分馏二聚产物以产生高纯度二异氰酸酯(97 +%)。 在烷基为C 3至C 6的情况下,并且在醚的解离时产生相应的醇,可以进行组合的解离 - 蒸馏,使得异烯烃为塔顶产物,醇为底部。