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    Neutralization and Precipitation of Silica from High pH Brines
    2.
    发明申请
    Neutralization and Precipitation of Silica from High pH Brines 审中-公开
    高pH盐酸二氧化硅的中和沉淀

    公开(公告)号：US20130193077A1

    公开(公告)日：2013-08-01

    申请号：US13561258

    申请日：2012-07-30

    申请人： Ravi Chidambaran ,  Pavan Raina ,  Narendra Singh Bisht

    发明人： Ravi Chidambaran ,  Pavan Raina ,  Narendra Singh Bisht

    IPC分类号： C02F1/52

    CPC分类号： C02F1/52 ,  C02F1/5245 ,  C02F1/56 ,  C02F1/66 ,  C02F2101/10 ,  C02F2103/10

    摘要： We provide a process for the neutralization and precipitation of high pH brines that eliminates the formation of “gelatinous silica” during neutralization. The high pH brine is neutralized in a two-step neutralization process. In the first step the salt concentration of a high pH brine is built up to a minimum level of 8-12%, and then its pH is reduced to 9-9.5. The partially neutralized brine is allowed a reaction period with mild agitation. Subsequently the pH is further reduced, typically to 8-9. A coagulant and/or a polymer can also be used to enhance the settling or filtration rate of the neutralized stream.

    摘要翻译： 我们提供了一个中和和沉淀高pH盐酸盐的方法，消除了在中和过程中形成“凝胶状二氧化硅”。 高pH盐酸盐在两步中和过程中被中和。 在第一步中，高pH盐水的盐浓度达到8-12％的最低水平，然后将其pH降至9-9.5。 允许部分中和的盐水在温和搅拌下进行反应。 随后pH进一步降低，通常为8-9。 凝结剂和/或聚合物也可用于增强中和流的沉降或过滤速率。

    Preparation of high performance ultra filtration hollow fiber membrane
    3.
    发明授权
    Preparation of high performance ultra filtration hollow fiber membrane 有权
    制备高性能超滤中空纤维膜

    公开(公告)号：US08424688B2

    公开(公告)日：2013-04-23

    申请号：US13354664

    申请日：2012-01-20

    申请人： Ravi Chidambaran ,  Devesh Sharma ,  Pavan Raina ,  Sugata Das

    发明人： Ravi Chidambaran ,  Devesh Sharma ,  Pavan Raina ,  Sugata Das

    IPC分类号： B01D33/00 ,  B01D39/00 ,  B01D39/14

    CPC分类号： C02F1/444 ,  B01D61/145 ,  B01D69/02 ,  B01D69/087 ,  B01D71/44 ,  B01D71/68 ,  B01D2323/02 ,  B01D2323/18 ,  B01D2323/22 ,  B01D2325/022 ,  B01D2325/34 ,  C08L39/06 ,  D01D1/02 ,  D01D5/24 ,  D01F6/44 ,  D01F6/94 ,  C08L2666/02

    摘要： A multipolymeric mixture is provided that includes a hydrophobic polymer, two different grades of a water-soluble polymer, water as non-solvent and a solvent suitable for all polymers involved. The dissolved hydrophobic polymer has the affinity to enmesh the water-soluble polymers to form a clear and viscous dope. Water-soluble polymers contribute to the pore formation process and hydrophilicity of the finally coagulated membrane according to the makeup of their molecular weight distribution.Water as a non-solvent takes the dope very near towards unstable zone, which helps in speeding up the membrane formation process in a diffusion induced phase inversion technique. The dope is then spun through a concentric orifice spinneret and solidified by passing it through a coagulation bath to form hollow fiber asymmetric membranes of ultra filtration grade with superior water permeability and separation characters even at higher feed turbidity.

    摘要翻译： 提供了一种聚合物混合物，其包括疏水性聚合物，两种不同等级的水溶性聚合物，作为非溶剂的水和适用于所有聚合物的溶剂。 溶解的疏水性聚合物具有与水溶性聚合物的亲和性以形成透明和粘稠的涂料。 根据其分子量分布的组成，水溶性聚合物有助于最终凝结膜的孔形成过程和亲水性。 作为非溶剂的水将涂料非常靠近不稳定区域，这有助于在扩散诱导的相转化技术中加速膜形成过程。 然后将纺丝液通过同心孔喷丝头纺丝并通过将其通过凝固浴固化以形成即使在更高的进料浊度下也具有优异的透水性和分离特性的超滤级别的中空纤维不对称膜。

    PREPARATION OF HIGH PERFORMANCE ULTRA FILTRATION HOLLOW FIBER MEMBRANE
    4.
    发明申请
    PREPARATION OF HIGH PERFORMANCE ULTRA FILTRATION HOLLOW FIBER MEMBRANE 有权
    高性能超滤膜中空纤维膜的制备

    公开(公告)号：US20120111790A1

    公开(公告)日：2012-05-10

    申请号：US13354664

    申请日：2012-01-20

    申请人： Ravi Chidambaran ,  Devesh Sharma ,  Pavan Raina ,  Sugata Das

    发明人： Ravi Chidambaran ,  Devesh Sharma ,  Pavan Raina ,  Sugata Das

    IPC分类号： B01D71/82 ,  B01D71/68 ,  C08L39/06 ,  B01D69/08

    CPC分类号： C02F1/444 ,  B01D61/145 ,  B01D69/02 ,  B01D69/087 ,  B01D71/44 ,  B01D71/68 ,  B01D2323/02 ,  B01D2323/18 ,  B01D2323/22 ,  B01D2325/022 ,  B01D2325/34 ,  C08L39/06 ,  D01D1/02 ,  D01D5/24 ,  D01F6/44 ,  D01F6/94 ,  C08L2666/02

    摘要： A multipolymeric mixture is provided that includes a hydrophobic polymer, two different grades of a water-soluble polymer, water as non-solvent and a solvent suitable for all polymers involved. The dissolved hydrophobic polymer has the affinity to enmesh the water-soluble polymers to form a clear and viscous dope. Water-soluble polymers contribute to the pore formation process and hydrophilicity of the finally coagulated membrane according to the makeup of their molecular weight distribution.Water as a non-solvent takes the dope very near towards unstable zone, which helps in speeding up the membrane formation process in a diffusion induced phase inversion technique. The dope is then spun through a concentric orifice spinneret and solidified by passing it through a coagulation bath to form hollow fiber asymmetric membranes of ultra filtration grade with superior water permeability and separation characters even at higher feed turbidity.

    摘要翻译： 提供了一种聚合物混合物，其包括疏水性聚合物，两种不同等级的水溶性聚合物，作为非溶剂的水和适用于所有聚合物的溶剂。 溶解的疏水性聚合物具有与水溶性聚合物的亲和性以形成透明和粘稠的涂料。 根据其分子量分布的组成，水溶性聚合物有助于最终凝结膜的孔形成过程和亲水性。 作为非溶剂的水将涂料非常靠近不稳定区域，这有助于在扩散诱导的相转化技术中加速膜形成过程。 然后将纺丝液通过同心孔喷丝头纺丝并通过将其通过凝固浴固化以形成即使在更高的进料浊度下也具有优异的透水性和分离特性的超滤级别的中空纤维不对称膜。

    REVERSE OSMOSIS ENHANCED RECOVERY HYBRID PROCESS
    5.
    发明申请
    REVERSE OSMOSIS ENHANCED RECOVERY HYBRID PROCESS 审中-公开
    反向强化恢复混合过程

    公开(公告)号：US20100032375A1

    公开(公告)日：2010-02-11

    申请号：US12536303

    申请日：2009-08-05

    申请人： Venkataraman Jagannathan ,  Ravi Chidambaran ,  Manoj Sharma

    发明人： Venkataraman Jagannathan ,  Ravi Chidambaran ,  Manoj Sharma

    IPC分类号： C02F1/44 ,  C02F5/02 ,  C02F1/66

    CPC分类号： C02F1/441 ,  C02F1/001 ,  C02F1/52 ,  C02F1/66 ,  C02F1/76 ,  C02F5/02 ,  C02F2103/023

    摘要： Disclosed is a high-recovery integrated recycling process to treat water and waste water having high hardness, silica, and other contaminants to facilitate operation of a reverse osmosis (RO) membrane at very high overall recovery when treating waste water containing high concentration of sparingly soluble inorganic salts like hardness, silica, and other components such as silica, etc. The RO membrane continuously operates in low or conservative recovery conditions, but can still achieve a very high overall system recovery. The process includes precipitation softening in a softening clarifier where the scale forming salts are reduced followed by filtration and reverse osmosis. The precipitated salts are removed as underflow from the clarifier. The softened or partially softened water is then filtered by a conventional filtration system, for example by a media filter. This is then fed to a reverse osmosis membrane unit that is designed to operate at an appropriate recovery to avoid scaling and fouling. Normally the recovery can be maintained quite low, for example at 50 to 60% of the feed flow.

    摘要翻译： 公开了一种高回收率综合回收方法，用于处理具有高硬度，二氧化硅和其他污染物的水和废水，以便在处理含高浓度微溶性废水时，以非常高的总体回收率进行反渗透（RO）膜的操作 无机盐如硬度，二氧化硅和其他组分如二氧化硅等.RN膜在低或保守的回收条件下连续运行，但仍可实现非常高的总体系统回收率。 该方法包括软化澄清剂中的沉淀软化，其中垢形成盐被还原，然后过滤和反渗透。 沉淀的盐从澄清池中下溢出去除。 然后通过常规的过滤系统例如通过介质过滤器过滤软化或部分软化的水。 然后将其送入反渗透膜单元，反渗透膜单元被设计成在适当的回收下操作以避免结垢和结垢。 通常，回收率可以维持相当低，例如进料流量的50％至60％。

    Preparation of high performance ultra filtration hollow fiber membrane
    7.
    发明授权
    Preparation of high performance ultra filtration hollow fiber membrane 有权
    制备高性能超滤中空纤维膜

    公开(公告)号：US08104624B2

    公开(公告)日：2012-01-31

    申请号：US12481909

    申请日：2009-06-10

    申请人： Ravi Chidambaran ,  Devesh Sharma ,  Pavan Raina ,  Sugata Das

    发明人： Ravi Chidambaran ,  Devesh Sharma ,  Pavan Raina ,  Sugata Das

    IPC分类号： B01D69/08 ,  B01D69/00

    CPC分类号： C02F1/444 ,  B01D61/145 ,  B01D69/02 ,  B01D69/087 ,  B01D71/44 ,  B01D71/68 ,  B01D2323/02 ,  B01D2323/18 ,  B01D2323/22 ,  B01D2325/022 ,  B01D2325/34 ,  C08L39/06 ,  D01D1/02 ,  D01D5/24 ,  D01F6/44 ,  D01F6/94 ,  C08L2666/02

    摘要： A multipolymeric mixture is provided that includes a hydrophobic polymer, two different grades of a water-soluble polymer, water as non-solvent and a solvent suitable for all polymers involved. The dissolved hydrophobic polymer has the affinity to enmesh the water-soluble polymers to form a clear and viscous dope. Water-soluble polymers contribute to the pore formation process and hydrophilicity of the finally coagulated membrane according to the makeup of their molecular weight distribution.Water as a non-solvent takes the dope very near towards unstable zone, which helps in speeding up the membrane formation process in a diffusion induced phase inversion technique. The dope is then spun through a concentric orifice spinneret and solidified by passing it through a coagulation bath to form hollow fiber asymmetric membranes of ultra filtration grade with superior water permeability and separation characters even at higher feed turbidity.

    摘要翻译： 提供了一种聚合物混合物，其包括疏水性聚合物，两种不同等级的水溶性聚合物，作为非溶剂的水和适用于所有聚合物的溶剂。 溶解的疏水性聚合物具有与水溶性聚合物的亲和性以形成透明和粘稠的涂料。 根据其分子量分布的组成，水溶性聚合物有助于最终凝结膜的孔形成过程和亲水性。 作为非溶剂的水将涂料非常靠近不稳定区域，这有助于在扩散诱导的相转化技术中加速膜形成过程。 然后将纺丝液通过同心孔喷丝头纺丝并通过将其通过凝固浴固化以形成即使在更高的进料浊度下也具有优异的透水性和分离特性的超滤级别的中空纤维不对称膜。

    Fractional deionization process
    8.
    发明授权
    Fractional deionization process 有权
    分数去离子过程

    公开(公告)号：US07338600B2

    公开(公告)日：2008-03-04

    申请号：US11030926

    申请日：2005-01-07

    申请人： Ravi Chidambaran ,  Pavan Raina ,  Devesh Sharma

    发明人： Ravi Chidambaran ,  Pavan Raina ,  Devesh Sharma

    IPC分类号： B01D61/48 ,  C02F1/469

    CPC分类号： C02F1/4695 ,  B01D61/48 ,  B01D61/52 ,  B01J47/08 ,  C02F1/003 ,  C02F1/005 ,  C02F1/42 ,  C02F1/4602 ,  C02F1/4604 ,  C02F1/4693 ,  C02F1/68 ,  C02F5/00 ,  C02F11/00 ,  C02F11/18 ,  C02F2201/46115 ,  C02F2201/46125

    摘要： A liquid treatment process is described for sequential removal of ionic species of progressively decreasing ionic strength without precipitation or “scaling.” An aspect of the invention includes two or more electrodeionization operations within one or more electrodeionization stacks. The first electrodeionization operation is performed at a voltage calculated to remove strongly ionized species such as calcium and magnesium from the feed water without scaling. The product of the first electrodeionization operation is then subjected to a second electrodeionization operation. The second electrodeionization operation is performed at a voltage the same as the first electrodeionization operation, and is designed to remove more weakly ionized species such as silica and carbon dioxide, preventing scaling. More than two successive electrodeionization operations may be performed if desired. Multiple electrodeionization operations may occur in a single electrodeionization stack or in multiple electrodeionization stacks.

    摘要翻译： 描述了一种液体处理方法，用于顺序地去除逐渐降低的离子强度的离子物质，而没有沉淀或“结垢”。 本发明的一个方面包括在一个或多个电去离子堆叠内的两个或多个电去离子操作。 第一电去电离操作以计算为从进料水中除去强烈离子化物质例如钙和镁的电压进行，而没有结垢。 然后对第一电去电离操作的产物进行第二电去离子化操作。 第二电去离子化操作在与第一电去离子化操作相同的电压下进行，并且被设计成除去更弱的电离物质如二氧化硅和二氧化碳，防止结垢。 如果需要，可以进行两次以上的电去离子化操作。 多个电去离子化操作可能发生在单个电去离子堆叠或多个电去离子堆叠中。