Method of producing microfiltration membranes from aromatic polyamides
    2.
    发明授权
    Method of producing microfiltration membranes from aromatic polyamides 失效
    从芳族聚酰胺生产微细膜的方法

    公开(公告)号:US5139712A

    公开(公告)日:1992-08-18

    申请号:US644337

    申请日:1991-01-22

    IPC分类号: B01D67/00 B01D71/56

    摘要: A process for the manufacture of microfiltration membranes from aromatic polyamides, of which the pore sizes are between 0.05 and 10 .mu.m. A copolymer of isophthalic acid and m-phenylenediamine is dissolved in a solvent mixture of dimethylacetamide and dimethylformamide in the presence of alkali or alkaline earth chlorides and polyethyleneglycol. This solution is produced without the addition of water and is subsequently poured out onto a smooth surface formed of chemically inert material with the formation of the membranes. The water that is required as the precipitation agent, is only added to the poured-out solution by means of the air humidity. The relative air humidity is increased from 30% to 100% during formation of the membranes.

    摘要翻译: 用于从芳族聚酰胺制造微孔膜的方法,其孔径在0.05-10μm之间。 将间苯二甲酸和间苯二胺的共聚物在碱金属或碱土金属氯化物和聚乙二醇的存在下溶于二甲基乙酰胺和二甲基甲酰胺的溶剂混合物中。 该溶液是在不添加水的情况下生产的,随后将其倒入由化学惰性材料形成的光滑表面上形成膜。 作为沉淀剂需要的水仅通过空气湿度添加到倾出的溶液中。 在膜形成过程中相对空气湿度从30%增加到100%。

    Asymmetrical ultrafiltration membrane based on cellulose hydrate
    3.
    发明授权
    Asymmetrical ultrafiltration membrane based on cellulose hydrate 失效
    基于纤维素水合物的不对称超滤膜

    公开(公告)号:US4234528A

    公开(公告)日:1980-11-18

    申请号:US28804

    申请日:1979-04-10

    摘要: An asymmetrical ultrafiltration membrane based on cellulose hydrate which may be dried without destructive shrinkage and which has been saponified without reduction in flow-through or separation performance is prepared by adding hydrophobic synthetic silicic acid to a casting solution based on cellulose triacetate optionally partially substituted by cellulose diacetate, and then casting the cellulose acetate membrane and saponifying to the cellulose hydrate form.

    摘要翻译: 基于纤维素水合物的不对称超滤膜可以在没有破坏性收缩的情况下被干燥并且在不降低流通或分离性能的情况下被皂化而制备,通过将疏水性合成硅酸添加到基于纤维素三乙酸酯的任选部分被纤维素 二乙酸酯,然后浇铸乙酸纤维素膜并皂化成纤维素水合物形式。

    Separating device for fluids, consisting of support plates and cut
sections of a semi-permeable diaphragm
    4.
    发明授权
    Separating device for fluids, consisting of support plates and cut sections of a semi-permeable diaphragm 失效
    用于流体的分离装置,由支撑板和半透膜的切割部分组成

    公开(公告)号:US4430218A

    公开(公告)日:1984-02-07

    申请号:US281931

    申请日:1981-07-10

    摘要: A filtration or diffusion cell, consisting of adjacent facing support plates and cut diaphragm sections of a semi-permeable diaphragm, for the treating fluids. The support plates are sealed by stringlike or bandlike sealing elements for the separate flow conduction of the fluids. Support plates are provided with channel grooves, for holding the sealing elements. The channel grooves are open toward the plate plane and are provided with perforations through which a sealing material inserted in a flowable state and solidified in the grooves. Several support plates are connected by the sealing material to form a plate holder-like unit, and form seals for separate flow conduction. The support plates are square-shaped, and the front side and the back side of the cut diaphragm sections are subjected to crosswise flow of the fluid. The cut diaphragm sections are supported by grooves and groove crests extending in flow direction of the support plates. The grooves are provided with longitudinally spaced passages leading to the opposite side of the support plates. Flow barriers crossing the grooves under an angle of about 45.degree. bring about a uniform overflowing of the diaphragm surfaces and prevent shortcuts.

    摘要翻译: 用于处理流体的过滤或扩散池由相邻的相对的支撑板和半透膜的切割隔膜部分组成。 支撑板通过线状或带状密封元件密封,用于流体的单独流动传导。 支撑板设置有用于保持密封元件的通道槽。 通道槽朝向板平面敞开,并且设置有穿孔,密封材料通过该穿孔插入到可流动状态并在槽中固化。 几个支撑板通过密封材料连接以形成板保持器状单元,并形成用于单独流动传导的密封件。 支撑板是方形的,切割的隔膜部分的前侧和后侧受到流体的横向流动。 切割的隔膜部分由沿着支撑板的流动方向延伸的凹槽和凹槽凸起支撑。 凹槽设置有通向支撑板的相对侧的纵向隔开的通道。 在大约45°的角度穿过槽的流动障碍物使隔膜表面均匀地溢出并防止快捷方式。

    Method of manufacturing foam beads
    6.
    发明授权
    Method of manufacturing foam beads 失效
    泡沫珠的制造方法

    公开(公告)号:US5480599A

    公开(公告)日:1996-01-02

    申请号:US289546

    申请日:1994-08-12

    CPC分类号: B29C44/3461

    摘要: A continuous process for manufacturing foam beads using a simple apparatus, wherein the expansion agent can be easily recycled. Polymer particles and a dispersing medium are fed continuously to an unstirred mass transfer column having a high length to diameter ratio which is operated under pressure. The polymer particles and dispersing medium are subjected to thermal processing under pressure in the mass transfer column, and the resulting dispersion is sprayed into a low pressure space causing the polymer particles to expand. Accordingly, foam beads of constant quality and a uniform cell diameter and a uniform degree of expansion are manufactured without costly process means.

    摘要翻译: 使用简单的装置制造泡沫珠的连续方法,其中膨胀剂可以容易地再循环。 将聚合物颗粒和分散介质连续供给到在加压下操作的具有高长径比的未搅拌的传质柱。 聚合物颗粒和分散介质在传质柱中在压力下进行热处理,将所得分散体喷射到低压空间中,使聚合物颗粒膨胀。 因此,在没有昂贵的处理手段的情况下,制造质量恒定,泡孔直径均匀,均匀膨胀程度的泡沫珠。

    Filter for gas filtration
    7.
    发明授权
    Filter for gas filtration 失效
    过滤器用于气体过滤

    公开(公告)号:US4529419A

    公开(公告)日:1985-07-16

    申请号:US605844

    申请日:1984-05-01

    摘要: A filter consisting of connected upper housing and lower housing parts and a hydrophobic flat filter disc for gas filtration sandwiched therebetween, intended in particular for an exchange between a container such as a liquid reservoir partially filled with liquid and the surrounding atmosphere. The upper housing part includes an integral channelled filter support having channels for communication into a gas inlet-outlet means of the said upper housing part. The lower housing part includes an integral, channelled filter support having channels for communication into a centrally disposed bore located at a right angle to the filter support and empties into the gas area of a liquid reservoir for instance. The filter support is constructed to prevent liquid from completely blocking the hydrophobic filter disc.The filter support of the lower housing forms a planar plane with an annular channel therein and a series of radially extending channels terminating at a centrally located bore. The channels having a controlled depth. The bore diameter is also controlled. The upper housing is dimensioned to provide a controlled distance for the filter from the filter support in the lower housing.

    摘要翻译: 由连接的上壳体和下壳体部件组成的过滤器和夹在其间的用于气体过滤的疏水扁平过滤盘,特别用于在容器(例如部分充满液体的液体储存器)与周围环境之间进行更换。 上部壳体部分包括一个整体的通道过滤器支撑件,其具有用于连通到所述上部壳体部分的气体入口 - 出口装置的通道。 下部壳体部分包括一体的通道过滤器支架,其具有用于连通到位于与过滤器支撑件成直角的中心设置的孔的通道,并且例如被排空到液体储存器的气体区域中。 过滤器支架被构造成防止液体完全阻塞疏水性过滤盘。 下壳体的过滤器支撑件形成具有其中的环形通道的平面平面,并且一系列径向延伸的通道终止于位于中心的孔。 通道具有受控的深度。 孔径也受到控制。 上壳体的尺寸设计成为过滤器提供了与下壳体中的过滤器支撑件的受控距离。

    Apparatus for static membrane filtration
    9.
    发明授权
    Apparatus for static membrane filtration 失效
    静态膜过滤装置

    公开(公告)号:US4490256A

    公开(公告)日:1984-12-25

    申请号:US554995

    申请日:1983-11-25

    摘要: An apparatus for static membrane filtration, including a cylindrical sample vessel containing a filtration medium and subjected to centrifugal acceleration. A plunger is mounted in sealed manner in the sample vessel, and is being movable therein. An asymmetrical membrane is attached at the end of the plunger facing the bottom of the sample vessel, with the filtration active side of the membrane facing towards the outside. The bottom of the sample vessel is provided with a sealable opening. The mean density of the plunger is greater than the density of the filtration medium, and the length of the plunger in cm is greater or equal to the reciprocal of the mean plunger density in g/cm.sup.3 reduced by 1.

    摘要翻译: 一种用于静态膜过滤的装置,包括含有过滤介质并进行离心加速的圆柱形样品容器。 柱塞以密封的方式安装在样品容器中,并且可在其中移动。 在柱塞的端部附近,不对称的膜附着在样品容器的底部,膜的过滤活性侧面向外部。 样品容器的底部设有可密封的开口。 柱塞的平均密度大于过滤介质的密度,柱塞的长度(cm)大于或等于平均柱塞密度(g / cm3)的倒数减小1。