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    • 5. 发明授权
    • Separation of a mixture of C.sub.4 -hydrocarbons by extractive
distillation
    • 通过萃取蒸馏分离C {HD 4 {B-烃的混合物
    • US4162198A
    • 1979-07-24
    • US906469
    • 1978-05-17
    • Dieter StockburgerKlaus VolkamerDetlef BenderKlaus-Juergen SchneiderHarald SchwentkerUlrich WagnerHans-Martin Weitz
    • Dieter StockburgerKlaus VolkamerDetlef BenderKlaus-Juergen SchneiderHarald SchwentkerUlrich WagnerHans-Martin Weitz
    • B01D3/40C07C1/00C07C7/08C07C9/00C07C11/00C07C11/167C07C67/00B01D3/06
    • C07C7/08B01D3/40Y10S203/20
    • A process for separating, by means of a selective solvent, a mixture of C.sub.4 -hydrocarbons which contains some hydrocarbons which are more soluble in the selective solvent and some which are less soluble therein, in which process the hydrocarbon mixture is separated, in an extractive distillation zone, into a top product which contains the less soluble hydrocarbons and an extract which contains the more soluble hydrocarbons and the selective solvent, the extract, taken off as the bottom product, is subjected to a flash evaporation and the resulting vapor component of the extract is recycled to the extractive distillation zone while the liquid phase remaining after the flash evaporation is fed to a solvent recovery zone, in which the liquid phase obtained from the flash evaporation is separated into a product containing the hydrocarbons and, as the bottom product, the selective solvent which has been freed from the hydrocarbons, the resulting selective solvent is recycled to the extractive distillation zone and the product which is obtained from the solvent recovery zone and contains the hydrocarbons is partially or completely recycled to the extractive distillation zone, after increasing the pressure in a compression zone, in which process the extract taken off the extractive distillation zone is brought, prior to the flash evaporation to a higher pressure than the pressure in the extractive distillation zone and thereafter the extract which is under this higher pressure is heated, in a heat exchange zone, by indirect heat exchange with the selective solvent obtained as the bottom product from the solvent recovery zone, and the heated extract is subsequently let down, in the flash evaporation, to a pressure which is at least equal to the pressure in the extractive distillation zone and is higher than the pressure in the solvent recovery zone.
    • 通过选择性溶剂分离出含有一些较易溶于选择性溶剂的烃和一些较不溶于其中的烃类的混合物的混合物的方法,在该方法中,烃混合物在萃取过程中分离 蒸馏区,成为含有较少溶解性烃的顶部产物和含有较多可溶性烃和选择性溶剂的提取物,作为底部产物取出的萃取物进行闪蒸,并将得到的蒸气成分 萃取液再循环到萃取蒸馏区,闪蒸蒸发后剩余的液相被送入溶剂回收区,其中将从闪蒸蒸发获得的液相分离成含有烃的产物,作为底部产物, 已经从烃中除去的选择性溶剂,所得到的选择性溶剂被再循环到萃取物中 蒸馏区和从溶剂回收区获得并且含有烃的产物在增加压缩区中的压力之后部分或完全再循环到萃取蒸馏区,在该过程中,提取物从萃取蒸馏区被带走 在闪蒸蒸发到比萃取蒸馏区中的压力高的压力之前,然后将在该较高压力下的提取物在热交换区域中与作为底部产物获得的选择性溶剂进行间接热交换 然后将被加热的提取物在闪蒸中降至至少等于萃取蒸馏区压力的压力,并高于溶剂回收区的压力。
    • 7. 发明授权
    • Removal of condensable aliphatic hydrocarbons and acidic gases from
natural gas
    • 从天然气中去除可冷凝的脂族烃和酸性气体
    • US4414004A
    • 1983-11-08
    • US356721
    • 1982-03-10
    • Eckhart WagnerUlrich WagnerKlaus VolkamerWolfgang Vodrazka
    • Eckhart WagnerUlrich WagnerKlaus VolkamerWolfgang Vodrazka
    • B01D53/14C07C7/11C10G5/04
    • C10G5/04B01D53/1456B01D53/1487B01D53/1493C07C7/11C10G2300/1025
    • A process for removing condensable aliphatic hydrocarbons and acidic gases such as H.sub.2 S, CO.sub.2 and COS from natural gas containing these, wherein the natural gas is initially treated with polyethylene glycol dialkyl ethers, as the solvent, in a first absorption stage to effect absorption of the condensable aliphatic hydrocarbons; the natural gas drawn off from the first absorption stage is then treated with polyethylene glycol dialkyl ethers, as the solvent, under superatmospheric pressure in a second absorption stage, the acidic gases being completely or partly absorbed; the solvent charged with the condensable aliphatic hydrocarbons which is obtained from the first absorption stage is treated with water in an extraction stage, to form a hydrocarbon phase containing the condensable aliphatic hydrocarbons and an aqueous dialkyl ether phase, and the hydrocarbon phase is separated from the aqueous dialkyl ether phase. The solvent charged with acid gases which is obtained from the second absorption stage is regenerated by expansion and/or stripping in a regeneration stage and the regenerated solvent is recycled to the absorption.
    • 从含有这些的天然气中除去可冷凝的脂族烃和酸性气体如H 2 S,CO 2和COS的方法,其中在第一吸收阶段天然气首先用聚乙二醇二烷基醚作为溶剂处理,以实现吸收 可缩合的脂族烃; 然后在第二吸收阶段的超大气压下,用作为溶剂的聚乙二醇二烷基醚处理从第一吸收阶段排出的天然气,酸性气体被完全或部分吸收; 在萃取阶段用水处理从第一吸收阶段得到的可冷凝脂肪族烃的溶剂,形成含有可冷凝脂族烃和二烷基醚水相的烃相,将烃相与 二烷基醚相水相。 通过在再生阶段中的膨胀和/或汽提再生从第二吸收阶段获得的装有酸性气体的溶剂,并将再生的溶剂再循环至吸收。
    • 10. 发明授权
    • Isolation of 1,3-butadiene from a C4-hydrocarbon mixture
    • 从C4烃混合物中分离出1,3-丁二烯
    • US4277314A
    • 1981-07-07
    • US40283
    • 1979-05-18
    • Alfred LindnerKlaus VolkamerUlrich Wagner
    • Alfred LindnerKlaus VolkamerUlrich Wagner
    • C07C7/08C07C1/00C07C7/00C07C7/05C07C11/167C07C67/00B01D3/40
    • C07C7/005C07C7/05
    • A process for isolating 1,3-butadiene by means of a selective solvent from a C.sub.4 -hydrocarbon mixture which contains 1,3-butadiene, propyne, hydrocarbons which are more soluble than 1,3-butadiene in the selective solvent and hydrocarbons which are less soluble than 1,3-butadiene in the selective solvent, wherein the C.sub.4 -hydrocarbon mixture is separated, using one or more extractive distillation zones, into a distillate containing the less soluble hydrocarbons, a stream of 1,3-butadiene and a stream containing the more soluble hydrocarbons, and the propyne is separated off either by distillation of the C.sub.4 -hydrocarbon mixture in a distillation zone upstream of the extractive distillation zone or zones or by distillation of the stream of 1,3-butadiene, obtained from the extractive distillation zone or zones, in a downstream distillation zone, giving a stream of hydrocarbons containing propyne and 1,3-butadiene, which stream is fed to an additional distillation zone, while at the same time a second stream of liquid or gaseous hydrocarbons is fed to the additional distillation zone, and the bottom product from the additional distillation zone is recycled to the extractive distillation.
    • 通过选择性溶剂从含有1,3-丁二烯,丙炔,在选择性溶剂中比1,3-丁二烯更可溶的烃的C 4烃混合物分离1,3-丁二烯的方法和烃,其为 在选择性溶剂中比1,3-丁二烯更难溶解,其中使用一个或多个萃取蒸馏区将C4-烃混合物分离成含有较不溶性烃的馏出物,1,3-丁二烯流和流 含有较多的可溶性烃,丙炔通过在萃取蒸馏区或蒸馏区上游的蒸馏区中蒸馏出C4烃混合物,或通过蒸馏萃取物获得的1,3-丁二烯来分离。 蒸馏区或区域,在下游蒸馏区中,产生含有丙炔和1,3-丁二烯的烃流,该料流被供给到另外的蒸馏区,同时a 液体或气态烃的第二流进料到另外的蒸馏区,并且来自附加蒸馏区的底部产物被再循环至萃取蒸馏。