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    • 2. 发明授权
    • Purification of N,N-dimethylacetamide
    • N,N-二甲基乙酰胺的纯化
    • US06946060B2
    • 2005-09-20
    • US10186764
    • 2002-07-01
    • Michael J. Gentilcore
    • Michael J. Gentilcore
    • B01D3/14B01D3/42C07C231/24C07C233/05
    • C07C231/24B01D3/146Y10S203/09C07C233/05
    • A method to purify N,N-dimethylacetamide (DMAc) from an aqueous solution containing acetic acid as a contaminant. Two fractional distillation columns are arranged in a series. The solution containing the contaminant is provided to the first column with a temperature profile to result in acetic acid partitioning into the overhead water. The material remaining in the bottom portion of the first column is recycled to the first column and also provided into a second column, whereby DMAc free of acetic acid contamination is recovered, and remaining DMAc and acetic acid are returned to the first column for further separation. The method uses standard fractional distillation procedures and equipment, thus eliminating the need for more complex extractions and/or chromatographic separations.
    • 从含有乙酸作为污染物的水溶液中净化N,N-二甲基乙酰胺(DMAc)的方法。 两个分馏塔排列成一系列。 将含有污染物的溶液以温度分布提供给第一塔,导致乙酸分配到塔顶水中。 残留在第一塔底部的材料被再循环到第一塔并且还提供到第二塔中,由此回收不含乙酸污染的DMAc,并且将剩余的DMAc和乙酸返回到第一塔进行进一步分离 。 该方法使用标准的分馏程序和设备,因此不需要更复杂的萃取和/或色谱分离。
    • 6. 发明授权
    • Dust control apparatus
    • 防尘设备
    • US5052451A
    • 1991-10-01
    • US661509
    • 1991-02-26
    • Michael J. GentilcoreDavid G. Mock
    • Michael J. GentilcoreDavid G. Mock
    • B65B1/28
    • B65B1/28
    • A dust control apparatus having a cover member lowerable into an opening of a container, the cover member having a radially expandable seal for sealing the opening, the cover member having a passage therethrough adapted to receive a conduit, the cover member being operable in telescoping relation to the conduit and the passage being sufficiently larger than the conduit for the passage of air between the cover member and conduit, the cover member being movable laterally relative to the conduit to enable the cover member to be lowered into a container which is not precisely aligned therewith, a filter sleeve having a lower end attached to the cover member and an upper end attached to the conduit, the filter sleeve being adapted to prevent the escape of dust from the space between the cover member and conduit, the filter sleeve being protected by the conduit from damage caused by materials flowing through the conduit, the apparatus including an optional fume collecting annulus locatable in surrounding relation to the filter sleeve for collecting and exhausting gases and fumes collected thereby, and an optional inlet port for introducing inert gases or pressurized air to the apparatus.
    • 一种防尘装置,具有能够容纳在容器的开口中的盖构件,所述盖构件具有用于密封所述开口的可径向扩张的密封件,所述盖构件具有适于容纳导管的通道,所述盖构件可伸缩地操作 导管和通道足够大于用于使盖构件和导管之间的空气通过的管道,盖构件可相对于管道横向移动,以使覆盖构件能够降低到不精确对准的容器中 其中,过滤套筒具有附接到盖构件的下端和附接到导管的上端,过滤套筒适于防止灰尘从盖构件和导管之间的空间逸出,过滤器套筒受到保护 该管道由于材料流经导管而造成损坏,该设备包括可选的烟雾收集环, 与过滤器套筒相关联,用于收集和排出由此收集的气体和烟雾,以及用于将惰性气体或加压空气引入到设备的可选入口。