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    • 9. 发明授权
    • Regenerating molecular sieve absorbents used for alcohol dehydration
    • 再生用于酒精脱水的分子筛吸附剂
    • US07767178B2
    • 2010-08-03
    • US11581825
    • 2006-10-17
    • Ahmad K. HilalyJoseph R. Beggin
    • Ahmad K. HilalyJoseph R. Beggin
    • B01D53/02
    • 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。 该过程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/水蒸汽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,最佳地以逆流方向 相对于脱水循环流动。 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。
    • 10. 发明授权
    • Process for production of high purity tocopherols
    • 生产高纯度生育酚的方法
    • US06673945B2
    • 2004-01-06
    • US10285700
    • 2002-11-01
    • Thomas P. BinderAhmad K. Hilaly
    • Thomas P. BinderAhmad K. Hilaly
    • C07D31172
    • C07D311/72
    • This invention provides a method of separating tocopherols by using a weakly basic polyvinyl pyridine resin. The resin has the capacity to selectively bind tocopherols, allowing other impurities typically found in a tocopherol production plant stream to separate from the tocopherols. After loading a tocopherol-containing mixture onto a separatory column packed with the resin, the loaded column is eluted with a solvent followed by an alcohol. The eluate is collected in fractions, and the tocopherol-containing fractions are combined and concentrated to yield a purified tocopherol composition. It has been found that the present invention produces highly purified tocopherol compositions (90+%), and is particularly useful for preparing highly purified tocopherol compositions, specifically enriched in &agr;-tocopherol.
    • 本发明提供了使用弱碱性聚乙烯吡啶树脂分离生育酚的方法。 树脂具有选择性结合生育酚的能力,允许通常在生育酚生产植物物流中发现的其它杂质与生育酚分离。 将含有生育酚的混合物装载到装有树脂的分离柱上后,用溶剂洗脱负载的柱,然后用醇洗脱。 将洗脱液以级分收集,并将含有生育酚的级分合并并浓缩,得到纯化的生育酚组合物。 已经发现,本发明产生高度纯化的生育酚组合物(90 +%),并且特别可用于制备特别富含α-生育酚的高度纯化的生育酚组合物。