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    • 1. 发明授权
    • Fluorine-containing polyimide gas separation membrane and method of
manufacturing the same
    • 含氟聚酰亚胺气体分离膜及其制造方法
    • US5817165A
    • 1998-10-06
    • US663509
    • 1996-06-13
    • Hisao HachisukaMasatoshi MaedaKenichi Ikeda
    • Hisao HachisukaMasatoshi MaedaKenichi Ikeda
    • B01D53/22B01D67/00B01D71/64C08G73/10
    • C08G73/1064B01D53/228B01D67/0011B01D67/0013B01D71/64C08G73/1039B01D2323/30B01D2325/022B01D2325/026B01D2325/26Y10S55/05
    • A fluorine-containing polyimide gas separation membrane which is pinhole-free, uniform over a large area, and has a high permeability and a high separation factor .alpha. is provided. A polyimide resin is dissolved in at least one solvent selected from the group consisting of an organic solvent (A) or (B). The organic solvent (A) has a dielectric constant of 30 or less and a dipole moment of 3.0 D or less. The organic solvent (B) mainly contains an organic solvent having at least one ether bonding in the molecular unit. In the next step, the polyimide resin is dipped in a solvent (C) in order for desolvation. The solvent (C) does not dissolve the fluorine-containing polyimide resin while it is miscible with the organic solvent (A) or (B). As a result, an asymmetric gas separation membrane is formed. The fluorine-containing polyimide resin layer comprises a skin layer the thickness L.sub.1 thereof is about 40 nm and a sponge like layer the thickness L.sub.2 thereof is about 30 .mu.m. The membrane is formed on a supporter of, for example, a nonwoven cloth.
    • 提供了一种无孔无孔,大面积均匀,且具有高透过率和高分离因子α的含氟聚酰亚胺气体分离膜。 将聚酰亚胺树脂溶解在选自有机溶剂(A)或(B)中的至少一种溶剂中。 有机溶剂(A)的介电常数为30以下,偶极矩为3.0​​D以下。 有机溶剂(B)主要含有在分子单元中具有至少一个醚键的有机溶剂。 在下一步骤中,将聚酰亚胺树脂浸渍在溶剂(C)中以进行去溶剂化。 溶剂(C)在与有机溶剂(A)或(B)可混溶时不溶解含氟聚酰亚胺树脂。 结果,形成不对称气体分离膜。 含氟聚酰亚胺树脂层的厚度L1约为40nm,海绵状层的厚度L2约为30μm。 该膜形成在例如非织造布的支撑物上。
    • 4. 发明授权
    • Gas separation method
    • 气体分离法
    • US5709733A
    • 1998-01-20
    • US654570
    • 1996-05-29
    • Hisao HachisukaKenichi IkedaKenichi Inoue
    • Hisao HachisukaKenichi IkedaKenichi Inoue
    • B01D53/22B01D69/02
    • B01D53/228B01D2257/504Y02C10/10
    • A method of separating a gas, especially carbon dioxide, from a gas mixture of the gas and nitrogen at a low temperature of -20.degree. C. to 50.degree. C. using a gas separation membrane permeable to the gas, including the step of cooling the gas mixture using at least one cooling medium selected from the group consisting of liquefied petroleum gas and liquefied natural gas. The liquefied petroleum gas comprises at least one selected from the group consisting of propane gas and butane gas in an amount of more than 50 vol. %. The gas separation membrane has a CO.sub.2 permeation rate of 1.times.10.sup.-4 to 5.times.10.sup.-2 N cm.sup.3 /(cm.sup.2 cm Hg sec) at 25.degree. C. and a CO.sub.2 /N.sub.2 separation factor of 10 to 200 at 25.degree. C.
    • 一种使用可渗透气体的气体分离膜,在-20℃至50℃的低温下将气体,特别是二氧化碳从气体和氮气的气体混合物分离的方法,包括冷却步骤 所述气体混合物使用选自由液化石油气和液化天然气组成的组中的至少一种冷却介质。 液化石油气包含选自丙烷气体和丁烷气体中的至少一种,其量大于50体积%。 %。 气体分离膜在25℃下的CO 2渗透速率为1×10 -4〜5×10 -2 cm 3 /(cm 2·cm Hg·秒),25℃时的CO 2 / N 2分离系数为10〜200。
    • 5. 发明授权
    • Reverse osmosis composite membrane and reverse osmosis treatment method for water using the same
    • 反渗透复合膜和反渗透处理方法为水使用相同
    • US06413425B1
    • 2002-07-02
    • US09055555
    • 1998-04-06
    • Hisao HachisukaKenichi Ikeda
    • Hisao HachisukaKenichi Ikeda
    • B01D7156
    • B01D67/0088B01D69/00B01D69/125B01D71/56C02F1/441Y02A20/131
    • A reverse osmosis composite membrane comprises a sponge layer, and a separation layer formed on a surface of the sponge layer, wherein at least one substance selected from the group consisting of an electrically neutral organic substance and an electrically neutral polymer is present in the separation layer or a surface of the separation layer is coated with at least one substance selected from the group consisting of an electrically neutral organic substance and an electrically neutral polymer, and wherein the specific surface area of the layer in which the at least one substance is present or the separation layer before the surface coating is in the range of 2 to 1,000. The reverse osmosis composite membrane has a high salt rejection, a high water permeability, and a high fouling tolerance, and permits practical desalination at a relatively low pressure.
    • 反渗透复合膜包括海绵层和形成在海绵层的表面上的分离层,其中选自电中性有机物质和电中性聚合物的至少一种物质存在于分离层 或者分离层的表面涂覆有选自电中性有机物质和电中性聚合物的至少一种物质,并且其中存在至少一种物质的层的比表面积或 在表面涂布之前的分离层在2至1,000的范围内。 反渗透复合膜具有高的拒水性,高透水性和高的耐污性,并且在相对低的压力下允许实际的脱盐。
    • 10. 发明授权
    • Laminated asymmetric membrane and method for manufacturing the same
    • 层压不对称膜及其制造方法
    • US5811196A
    • 1998-09-22
    • US803982
    • 1997-02-21
    • Hisao HachisukaKenichi Ikeda
    • Hisao HachisukaKenichi Ikeda
    • B01D69/12B01D71/64B01D71/70C08G73/10C08G77/04D06N3/18D06N7/00B32B27/00
    • B01D71/64B01D69/12Y10T428/31507Y10T428/31511Y10T428/31533Y10T428/3154Y10T428/31721Y10T428/31725
    • A laminated asymmetric membrane comprising first and second asymmetric membranes having different molecular structures, in which the first and second asymmetric membranes are laminated. Consequently, the laminated asymmetric membrane having the excellent property of the separation and permeability can be provided at a low cost. The laminated asymmetric membranes of the present invention is manufactured by the following steps: a film-forming dope (1) was prepared by synthesizing fluorine-containing polyimide having a repeating unit expressed by the following Chemical Formula by using diethylene glycol dimethyl ether as a solvent; a film-forming dope (2) was prepared by dissolving polysulfone in diethylene glycol dimethyl ether; the dope (2) from the resulted two dopes was cast on a polyester nonwoven cloth to a thickness of approximately 50 .mu.m by means of an applicator; the dope (1) was lap coated thereon to a thickness of 30 .mu.m; the dope (2) on which the dope (1) is coated was dipped in water as a solidifying solution at a temperature of 25.degree. C. for 5 minutes and in a water at a temperature of 20.degree. C. for one hour, thus forming a laminated asymmetric membrane. Chemical Formula ##STR1##
    • 一种层压的不对称膜,包括具有不同分子结构的第一和第二不对称膜,其中层压第一和第二不对称膜。 因此,可以以低成本提供具有优异的分离性和渗透性的层压不对称膜。 本发明的层压非对称膜通过以下步骤制造:通过使用二甘醇二甲醚作为溶剂合成具有由以下化学式表示的重复单元的含氟聚酰亚胺来制备成膜原液(1) ; 通过将聚砜溶解在二甘醇二甲醚中制备成膜原液(2); 将所得到的两种涂料的涂料(2)通过涂布器浇铸在聚酯无纺布上至约50μm的厚度; 将涂布液(1)在其上铺上厚度为30μm; 将涂布液(1)的涂布液(2)作为固化液在25℃的温度下浸渍5分钟,在20℃的水中浸渍1小时, 形成层压不对称膜。 化学式 + TR