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    • 2. 发明申请
    • Regenerating molecular sieve absorbents used for alcohol dehydration
    • 再生用于酒精脱水的分子筛吸附剂
    • US20070088182A1
    • 2007-04-19
    • US11581825
    • 2006-10-17
    • Ahmad HilalyJoseph Beggin
    • Ahmad HilalyJoseph Beggin
    • C07C29/88B01J38/04
    • B01J20/3408B01D15/00B01J20/18B01J20/3458B01J20/3483B01J29/90B01J38/02B01J38/04C07C29/76Y02P20/584C07C31/08
    • A process for regenerating a molecular sieve absorbent bed used for dehydrating an organic solvent is disclosed. The process is illustrated by regenerating a molecular sieve bed used for dehydrating ethanol, which includes a dehydrating cycle where an ethanol/water vapor mixture is loaded onto the molecular sieve bed at a first temperature to absorb water and recover a substantially dehydrated ethanol vapor effluent. In a regeneration cycle, the bed is subjected to a temperature swing technique whereby a dried gas, such as dried CO2, heated to at a second temperature greater than the first temperature, is passed over the molecular sieve bed, optimally in a counter current directional flow with respect to the dehydrating cycle. The process obviates the need for applying a vacuum pressure swing to regenerate the molecular sieve bed. Water and residual ethanol are removed with the CO2 effluent and can optionally be condensed and combined with a feed input for a subsequent dehydrating cycle.
    • 公开了一种用于再生用于使有机溶剂脱水的分子筛吸收剂床的方法。 该方法通过再生用于脱水乙醇的分子筛床来说明,其包括脱水循环,其中乙醇/水蒸气混合物在第一温度下加载到分子筛床上以吸收水并回收基本上脱水的乙醇蒸汽流出物。 在再生循环中,对床进行温度摆动技术,由此将加热到大于第一温度的第二温度的干燥的CO 2等干燥气体通过分子筛 床,相对于脱水循环以最佳的逆流定向流动。 该过程消除了施加真空压力摆动以再生分子筛床的需要。 用CO 2 CO 2流出物除去水和残余的乙醇,并且可任选地冷凝并与进料输入物组合以用于随后的脱水循环。