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    • 4. 发明公开
    • Method for removal of dimethyl ether and methanol from C4 hydrocarbon streams
    • 过程为二甲醚和甲醇的由C 4烃料流的分离。
    • EP0459627A1
    • 1991-12-04
    • EP91303854.3
    • 1991-04-29
    • CHEMICAL RESEARCH & LICENSING COMPANY
    • Smith, Lawrence A., Jr.Hearn, DennisJones, Edward M.,Jr.
    • C07C7/04
    • C07C7/04
    • A process for removing dimethyl ether (DME) and methanol impurities from C₄ hydrocarbon stream without substantial loss of C₄ hydrocarbons by fractionating a C₄ hydrocarbon stream containing DME and methanol at low levels, e.g., less than 5 wt.% to produce an overhead of about 20 to 40 volume % of the C₄ stream, condensing the overhead, contacting the condensed overhead with about 1 to 5 volumes of water, thereby removing a portion of the DME and methanol from the C₄ stream, returning substantially all of the C₄ stream, except the small amount solubilized in the water, to the fractionation and flashing the solubilized DME and hydrocarbons from the water. The fractionation and extraction are preferably carried out at elevated pressures, e.g., 200 to 300 psig to avoid refrigeration of the overhead condensation. The flashing of the DME and hydrocarbons is carried out by reducing the pressure on the water, e.g. atmospheric pressure at a temperature in the range of 20°C to 50°C, leaving methanol in the water. The methanol can be removed by distillation or by contacting the methanol containing water stream with a large volume of a C₄ stream whereby a portion of the methanol is extracted in the C₄ stream. The methanol depleted stream can recycle to contact the condensed overhead from the fractionation thereby establishing a closed circuit water wash/methanol recovery system.
    • 一种用于从C4烃流,而不C4烃的显着损失分馏含DME和甲醇在低的水平,例如,小于5重量%的C 4烃流中除去二甲醚(DME)和甲醇杂质的过程。%为制备在约开销 的C 4物流的20〜40体积%,冷凝的塔顶,与约1〜5倍体积的水接触的冷凝的塔顶,从而去除从所述C4物流中的DME和甲醇的部分,基本上返回所有的C 4物流,除了 少量在水中溶解,分馏和闪烁的从水中溶解的DME和烃。 分馏和提取在升高的压力优选进行,E. G.,200至300psig,以避免开销缩合的制冷。 的DME和烃的闪烁被减少了对水的压力进行,例如 在20℃至50℃范围内的温度大气压,留下甲醇在水中。 甲醇可以通过蒸馏或通过接触甲醇含水流与大体积的C 4物流,由此将甲醇的一部分的C 4流中被提取的被移除。 甲醇耗尽的物流可以再循环到从分馏从而建立一个闭合电路水洗涤/甲醇回收系统直接从冷凝的塔顶。
    • 5. 发明公开
    • Heat integration process
    • Wärmeintegrationsverfahren。
    • EP0366501A2
    • 1990-05-02
    • EP89311151.8
    • 1989-10-27
    • CHEMICAL RESEARCH & LICENSING COMPANY
    • Smith, Lawrence A., Jr.Jones, Edward M., Jr.Hearn, Dennis
    • C07C41/06C07C43/04
    • C07C41/42C07C41/06Y02P20/125C07C43/046
    • A portion of the heat of vaporization, required to separate and recover methanol from wash water used to remove methanol from a C₄ raffinate resulting from the reaction of isobutene containing C₄ hydrocarbons and methanol to produce MTBE is recovered by conducting the distillation of the methanol/water mixture at a pressure of 40 to 60 psig, thereby increasing the temperature of the methanol overhead to 104 to 114° C and using the reaction effluent from the MTBE reactor to cool and condense the methanol overhead, said reactor effluent being correspondingly heated prior to entry into a debutanizer tower where unreacted C₄'s and methanol are removed as a raffinate and MTBE product recovered. It is this raffinate that is washed with water to recover the unreacted methanol, with the methanol/water mixture being distilled as set forth above. In another embodiment a stream having a lower temperature than the methanol overhead is withdrawn from the debutanizer and used to cool the methanol overhead, then the correspondingly heated stream returned to the debutanizer.
    • 从用于从含有C4烃和甲醇的异丁烯反应产生的产生MTBE的C4萃余液中除去甲醇的洗涤水中分离和回收甲醇所需的部分蒸发热通过蒸馏甲醇/水 混合物在40至60psig的压力下,从而将甲醇塔顶馏出物的温度升高至104至114℃,并使用来自MTBE反应器的反应流出物冷却并冷凝甲醇塔顶馏出物,所述反应器流出物在进入之前相应地加热 进入脱丁烷塔,其中未反应的C4和甲醇作为萃余液除去,MTBE产物回收。 该残液用水洗涤以回收未反应的甲醇,如上所述蒸馏甲醇/水混合物。 在另一个实施方案中,具有比甲醇塔顶馏出物更低的温度的物流从脱丁烷塔中取出并用于冷却甲醇塔顶馏出物,然后将相应的加热物流返回到脱丁烷塔。
    • 7. 发明公开
    • Process for the production of MTBE
    • 生产MTBE的过程
    • EP0485078A1
    • 1992-05-13
    • EP91309465.2
    • 1991-10-15
    • CHEMICAL RESEARCH & LICENSING COMPANY
    • Smith, Lawrence A., Jr.Arganbright, Robert P.
    • B01D3/14B01D3/42C07C43/04C07C41/09C07C41/42
    • C07C41/42B01D3/009C07C41/09Y02P20/127C07C43/046
    • A catalytic distillation process for the production of methyl tertiary butyl ether (MTBE) from the reaction of tertiary butyl alcohol (TBA) and methanol (MeOH) is provided. A mixture of the reactants is fed into the reaction distillation column, preferably below a bed of acid ion exchange resin catalyst which constitutes a reaction distillation zone. In the reaction distillation zone the reactants contact the acid ion exchange resin catalyst and catalytically react to form MTBE and water. Some isobutene may also be formed. The acid ion exchange resin catalyst is in such a form as to act as both the catalyst for the reaction and distillation structure for the fractional distillation. A frothing liquid level is maintained in the catalyst bed to provide good contact and wetting of the catalyst.
    • 提供了由叔丁醇(TBA)和甲醇(MeOH)反应生产甲基叔丁基醚(MTBE)的催化蒸馏方法。 将反应物的混合物进料到反应蒸馏塔中,优选在构成反应蒸馏区的酸性离子交换树脂催化剂床的下方。 在反应蒸馏区中,反应物与酸性离子交换树脂催化剂接触并催化反应形成MTBE和水。 一些异丁烯也可能形成。 酸性离子交换树脂催化剂的形式既可作为反应的催化剂,也可作为分馏的蒸馏结构。 在催化剂床中保持发泡液体水平以提供催化剂的良好接触和润湿。