Process for suspension polymerization
    11.
    发明授权
    Process for suspension polymerization 失效
    悬浮聚合方法

    公开(公告)号:US5276113A

    公开(公告)日:1994-01-04

    申请号:US938515

    申请日:1992-09-02

    Abstract: There is provided a suspension polymerization process for production of polymer particles having a substantially uniform size, which process comprises the steps of: (a) applying regular vibration to a flow of a monomer liquid which has a specific gravity smaller than that of an aqueous dispersion medium, (b) introducing the aqueous dispersion medium containing the droplets in a first reactor comprising a recycling means which discharges the aqueous dispersion medium from the bottom of the reactor and recycles it to the top of the reactor, (c) partially polymerizing the monomer liquid in the first reactor so that the specific gravity of the droplets does not exceed that of the aqueous dispersion medium while maintaining the suspended condition of the droplets, and (d) discharging the partially polymerized droplets together with the aqueous dispersion medium from a lower portion of the first reactor and introducing them in a second reactor, and (e) further polymerizing the partially polymerized droplets in the second reactor.

    Abstract translation: 提供了一种用于生产具有基本均匀尺寸的聚合物颗粒的悬浮聚合方法,该方法包括以下步骤:(a)对比重小于水分散体的比重的单体液体的流动施加规则的振动 介质,(b)将含有液滴的水性分散介质引入第一反应器,该第一反应器包括从反应器底部排出水分散介质并将其再循环到反应器顶部的再循环装置,(c)将单体部分聚合 液体在第一反应器中,使得液滴的比重不超过水分散介质的比重,同时保持液滴的悬浮状态,并且(d)将部分聚合的液滴与水分散介质一起从下部排出 的第一反应器并将其引入第二反应器,和(e)进一步聚合部分聚合物 在第二反应器中精馏液滴。

    Controlled-release compositions for acids
    12.
    发明授权
    Controlled-release compositions for acids 失效
    酸的控释组合物

    公开(公告)号:US4923753A

    公开(公告)日:1990-05-08

    申请号:US30957

    申请日:1987-03-26

    Abstract: A controlled release composition for use with liquid acids, and a method of preparation is disclosed. The composition comprises (1) a porous matrix comprising and substantially inert to an absorbed acid; (2) a midlayer surrounding the matrix, this midlayer consisting essentially of a salt of the absorbed acid; and (3) a membrane surrounding the matrix, the membrane being exterior of the midlayer, the membrane further being substantially inert to the midlayer and permeable to a selected environment, the thickness and permeability of the membrane comprising means for controlling diffusion of the environment therethrough.The midlayer can be applied as a coating to the acid-bearing matrix, or it can be evolved by exposing the acid-bearing matrix to a base such as ammonia gas or a solid metal oxide for a time sufficient to allow reaction of a proportion of the acid at or near the surface of the matrix with the base to form a layer of the corresponding salt.

    Method and apparatus for conducting catalytic reactions with
simultaneous product separation and recovery
    13.
    发明授权
    Method and apparatus for conducting catalytic reactions with simultaneous product separation and recovery 失效
    用于同时进行产物分离和回收的催化反应的方法和装置

    公开(公告)号:US4786597A

    公开(公告)日:1988-11-22

    申请号:US479285

    申请日:1983-06-02

    Abstract: Catalytic chemical and biochemical conversion reactions are carried out in a novel compartmentalized catalytic reactor which enables the energy-efficient coupling of the conversion reaction with various energy-consuming post-conversion operations. The catalytic reactor is compartmentalized by means of a multilayer composite membrane comprising a catalytic membrane layer and one or more permselective membrane layers. The arrangement and properties of the membrane layers are such as to enable the free energy change of the conversion reaction to be utilized as the required energy source for effecting various post-conversion operations, including product separation, recovery and enrichment, and second-stage catalytic conversions with unfavorable reaction equilibria.

    Abstract translation: 催化化学和生物化学转化反应在新型间隔催化反应器中进行,其使能转化反应的能量效率耦合与各种耗能的后转化操作。 催化反应器通过包含催化膜层和一个或多个渗透选择性膜层的多层复合膜分隔。 膜层的排列和性质使得能够将转化反应的自由能变化用作所需的能源,用于进行各种后转化操作,包括产物分离,回收和富集,以及第二阶段催化 具有不利反应平衡的转化。

    Polymerization apparatus and process
    16.
    发明授权
    Polymerization apparatus and process 失效
    聚合装置和工艺

    公开(公告)号:US4276261A

    公开(公告)日:1981-06-30

    申请号:US57781

    申请日:1979-07-16

    CPC classification number: C08G63/785 B01J8/0278 B01J8/12

    Abstract: This invention relates to a solid state polymerization apparatus comprising a vertically oriented tube through which particulate resin flows downwardly in a plug flow fashion to the cone-shaped bottom portion of the reactor. The apparatus contains as an improvement a resin distribution means in the top portion thereof to distribute added resin in an orderly fashion to maintain a uniform level of polymer and also a double cone perforated gas distribution means in the bottom thereof to prevent backmixing and assure that a uniform plug flow condition is maintained as the polymer descends down the apparatus to a discharge valve at the bottom thereof.

    Abstract translation: 本发明涉及一种固态聚合装置,其包括垂直取向的管,颗粒树脂通过该垂直取向的管以活塞流方式向下流动到反应器的锥形底部。 该装置在其顶部包含树脂分配装置,以有序地分配添加的树脂以在其底部保持均匀水平的聚合物和双锥形穿孔气体分布装置,以防止回混,并确保 当聚合物下降到设备底部的排放阀时,保持均匀的塞子流动状态。

    Method and apparatus for increasing contact area in a multi-phase system
    17.
    发明授权
    Method and apparatus for increasing contact area in a multi-phase system 失效
    用于增加多相系统中的接触面积的方法和装置

    公开(公告)号:US4085170A

    公开(公告)日:1978-04-18

    申请号:US675415

    申请日:1976-04-09

    Abstract: The contact area between a first phase of a multi-phase system and a liquid second phase of the system is increased by effecting transient electrical discharges between electrodes immersed in the liquid second phase or in a volume of liquid in acoustic communication with the liquid second phase. The first phase can be in the form of a particulate solid, a gas, or a liquid of lower density than that of the second phase. The first phase is mingled with the second phase by a bubbling technique where the first phase has a lower density than the second phase. The hydraulic shock waves produced by the electrical discharges disperse the bubbles or particles of the first phase in the liquid second phase and thus increase the contact area between the phases.When the electrodes are immersed in a volume of liquid separate from but in acoustic communication with said liquid second phase, these liquids are separated by means of an acoustically transmissive membrane formed from a thin film of stainless steel or from rubber selected such that the product of density (.rho.) and velocity of propagation of sound waves (c) is matched to those of the liquids separated by the membrane.The spacing between the electrodes is adjusted in response to a sensed parameter of the electrical discharges such as to maintain the sensed parameter constant.

    Abstract translation: 多相系统的第一相和系统的液体第二相之间的接触面积通过在浸没在液体第二相中的电极之间或与液体第二相声学连通的液体体积中的瞬时放电而增加 。 第一相可以是比第二相低密度的颗粒状固体,气体或液体的形式。 第一相通过鼓泡技术与第二相混合,其中第一相具有比第二相低的密度。 由放电产生的液压冲击波将第一相的气泡或颗粒分散在液体第二相中,从而增加相之间的接触面积。

    Osmotic dispenser with means for dispensing active agent responsive to
osmotic gradient
    18.
    发明授权
    Osmotic dispenser with means for dispensing active agent responsive to osmotic gradient 失效
    渗透式分配器具有响应于渗透梯度分配活性剂的装置

    公开(公告)号:US3995631A

    公开(公告)日:1976-12-07

    申请号:US291686

    申请日:1972-09-25

    CPC classification number: A61D7/00 A01G7/06 A61K9/0004 B01J4/04 B65D1/04

    Abstract: An osmotic active agent dispenser is comprised of a chamber having controlled permeability to an external fluid, i.e., water, and containing an osmotically effective solute which, in solution, exhibits an osmotic pressure gradient against said external fluid, said chamber housing a flexible bag of relatively impervious material containing an active agent and provided with means or dispensing head for releasing said active agent to the exterior of the dispenser. The flexible bag is disposed within the said housing chamber such that as the, e.g., water permeates from the external environment through the permeable walls of the chamber and migrates or diffuses by osmosis into the solution contained therein, same increases in volume thereby generating mechanical compressing or deflating force on the flexible bag, which force in turn ejects the active agent out of the apparatus at an osmotically controlled rate over a prolonged period of time.

    Abstract translation: 渗透活性剂分配器包括具有对外部流体(即水)具有受控渗透性的腔室,并且含有渗透性有效的溶质,其在溶液中对所述外部流体显示出渗透压梯度,所述腔容纳柔性袋 相对不透水的材料含有活性剂并且具有用于将所述活性剂释放到分配器外部的装置或分配头。 柔性袋设置在所述容纳室内,使得例如水从外部环境通过室的可渗透壁渗透并通过渗透迁移或扩散到其中包含的溶液中,同样增加体积从而产生机械压缩 或在柔性袋上的放气力,该力随后在更长的时间内以渗透控制的速率将活性剂排出设备。

    Functional fluid gate control system

    公开(公告)号:US11413584B2

    公开(公告)日:2022-08-16

    申请号:US16612105

    申请日:2018-05-15

    Abstract: The present disclosure discloses a functional fluid gating control system, which comprises a porous membrane and a functional fluid. The functional fluid at least partially infiltrates the porous membrane and cooperates to form a fluid gating pathway. The functional fluid and/or the porous membrane responds to at least one stimulus and undergoes a physical change or a chemical change to change the threshold pressure of the transport substance. A transport fluid being immiscible with the functional fluid is controlled to pass through the fluid gating system, and thus controllable transport and multiphase separation of materials are achieved. The stimulus of the present disclosure comprises a wide range of sources, and the stimulus responsiveness of the functional fluid and the porous membrane can be randomly and freely combined to adapt to multiple stimuli from complex external conditions and achieve intelligent controllability.

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