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    • 4. 发明公开
    • SULFUR TRIOXIDE DELIVERY SYSTEM
    • 三氧化硫传递系统
    • EP1383709A2
    • 2004-01-28
    • EP02769302.7
    • 2002-05-01
    • E.I. DU PONT DE NEMOURS AND COMPANY
    • JACOBSON, Stephen, ErnestBLANK, Howard, M.CORBIN, David, Richard
    • C01B17/90B01J20/18
    • B01J20/28078B01D15/00B01J20/103B01J20/18C01B17/90Y10S502/517
    • A process for reversible sorption of sulfur trioxide onto a sorbent comprising a) contacting from about 15 % to 100 % sulfur trioxide with the sorbent under anhydrous conditions at a temperature of from about 35°C to about 150°C thereby sorbing the sulfur trioxide onto the sorbent, b) desorbing sulfur trioxide from the sorbent at a temperature of from about 150°C to about 350°C at about atmospheric pressure, or under a vacuum pressure, and c) recycling said sorbent by continuously repeating steps a) and b), wherein said sorbent consists essentially of silica or zeolite having a silicon to aluminum ratio in the ranges of from about 1 to about 4.4 or greater than about 5.1, and having a pore size of at least 0.5 nm is disclosed. Also claimed in a sulfur trioxide sorbent consisting essentially of silica or zeolite and characterized by its silicon to aluminum ratio and its pore size.
    • 一种三氧化硫可逆吸附到吸附剂上的方法,包括a)在约35℃ - 约150℃的温度下,在无水条件下使约15%-100%三氧化硫与吸附剂接触,从而将三氧化硫吸附到 吸附剂,b)在约大气压下或在真空压力下,在约150℃至约350℃的温度下从吸附剂解吸三氧化硫,以及c)通过连续重复步骤a)和b ),其中所述吸附剂基本上由二氧化硅或沸石组成,所述二氧化硅或沸石的硅与铝之比为约1至约4.4或大于约5.1,并且具有至少0.5nm的孔径。 还要求一种三氧化硫吸附剂,该吸附剂主要由二氧化硅或沸石组成,其特征在于其硅铝比和其孔径。