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    Silica Sol
    4.
    发明申请
    Silica Sol 有权
    二氧化硅溶胶

    公开(公告)号：US20160176719A1

    公开(公告)日：2016-06-23

    申请号：US14910330

    申请日：2014-08-20

    申请人： AKZO NOBEL CHENICALS INTERNATIONAL B.V.

    发明人： Erik Sanne ,  Freddie Hansson

    IPC分类号： C01B33/143 ,  D21H21/10 ,  D21H17/37 ,  C01B33/14 ,  D21H17/68

    CPC分类号： C01B33/143 ,  C01B33/14 ,  C01B33/141 ,  C01B33/142 ,  C01B33/145 ,  D21H17/375 ,  D21H17/68 ,  D21H19/40 ,  D21H21/10

    摘要： The present invention relates to a silica sol having a pH above about 10, molar ratio of Si02:M20, in which M is alkali metal, of from about 6:1 to about 16:1, concentration of soluble silica above about 3000 mg Si02/l, and S-value of from about 18 to about 40%. The invention further relates to a process for producing a silica sol which comprises acidifying an aqueous alkali metal silicate solution to a pH of from 1 to 4 to form an acid sol, alkalizing the acid sol by addition of aqueous alkali metal silicate solution to obtain an intermediate sol and interrupt the addition of aqueous alkali metal silicate solution when the intermediate sol has reached a pH of from about 5 to about 8, stirring the intermediate sol for a time period of from about 10 to about 6000 seconds without addition of aqueous alkali metal silicate solution, alkalizing the intermediate sol by addition of aqueous alkali metal silicate solution to obtain a silica sol having a pH above about 10 and molar ratio of Si02:M20, in which M is alkali metal, of from about 6:1 to about 16:1, and optionally adding an aluminum compound to the acid sol, intermediate sol or silica sol. The invention further relates to a silica sol obtainable by the process of the invention. The invention further relates to the use of the silica sol as a flocculating agent, in water purification and in producing paper and board. The invention further relates to a process for producing paper and board which comprises: (i) providing an aqueous suspension comprising cellulosic fibers; (ii) adding to the suspension one or more drainage and retention aids comprising the silica sol; and (iii) dewatering the obtained suspension to provide a sheet or web of paper or board.

    摘要翻译： 本发明涉及pH高于约10，SiO 2 :M 2 O摩尔比（其中M为碱金属）为约6:1至约16:1的二氧化硅溶胶，高于约3000mg SiO 2的可溶性二氧化硅浓度 / l，S值为约18至约40％。 本发明还涉及二氧化硅溶胶的制造方法，其包括将碱金属硅酸盐水溶液酸化至1〜4的pH以形成酸性溶胶，通过加入碱金属硅酸盐水溶液碱化酸性溶胶，得到 中间溶胶，并且当中间溶胶达到约5至约8的pH时中断加入碱金属硅酸盐水溶液，在不加入碱金属水溶液的情况下搅拌中间溶胶约10至约6000秒的时间 硅酸盐溶液，通过加入碱金属硅酸盐水溶液碱化中间体溶胶，得到pH高于约10的硅溶胶，其中M为碱金属的SiO 2 :M 2 O的摩尔比为约6:1至约16 ：1，并且任选地向酸性溶胶，中间溶胶或二氧化硅溶胶中加入铝化合物。 本发明还涉及通过本发明的方法获得的二氧化硅溶胶。 本发明还涉及二氧化硅溶胶作为絮凝剂，在水净化和生产纸和纸板中的用途。 本发明还涉及生产纸和纸板的方法，其包括：（i）提供包含纤维素纤维的水性悬浮液; （ii）向悬浮液中加入一种或多种包含二氧化硅溶胶的排水和助留剂; 和（iii）对获得的悬浮液进行脱水以提供纸张或纸板或纸板。

    Sodium silicate solutions
    6.
    发明授权
    Sodium silicate solutions 有权
    硅酸钠溶液

    公开(公告)号：US08734750B2

    公开(公告)日：2014-05-27

    申请号：US13930778

    申请日：2013-06-28

    申请人： The National Titanium Dioxide Co. Ltd. (CRISTAL)

    发明人： Fadi Mohammed Saeed Trabzuni ,  Hassan Moenes El Dekki ,  Chathangat Cheroolil Gopalkrishnan

    IPC分类号： C01B33/32

    CPC分类号： C01B33/32 ,  C01B33/12 ,  C01B33/143

    摘要： Sodium silicate solutions of modulus 3.0 to 3.8 are provided. In some embodiments, the solution is made by a process that uses two specific principal reaction stages. A sodium silicate solution having a low SiO2:Na2O molar ratio, in the range from 2.0 to 2.8, is first produced by reaction of the SSS, as a cost-effective SiO2 source, with aqueous caustic soda. The conversion of this intermediate sodium silicate solution of low modulus to a high SiO2:Na2O molar ratio is made possible by using a SiO2 source that is prepared as precipitated amorphous silica from the intermediate sodium silicate solution produced above.

    摘要翻译： 提供了模量为3.0至3.8的硅酸钠溶液。 在一些实施方案中，溶液通过使用两个特定主要反应级的方法制备。 首先通过作为成本有效的SiO 2源的SSS与苛性钠水溶液反应来制备SiO 2 :Na 2 O摩尔比低的硅酸钠溶液，其范围为2.0至2.8。 通过使用由上述制备的中间体硅酸钠溶液制备为沉淀的无定形二氧化硅的SiO 2源，可以将低模量的中等硅酸钠溶液转化为高SiO 2 :Na 2 O摩尔比。

    Silica gel manufacturing method and gels made thereby
    7.
    发明授权
    Silica gel manufacturing method and gels made thereby 有权
    硅胶制造方法和由此制成的凝胶

    公开(公告)号：US07803343B2

    公开(公告)日：2010-09-28

    申请号：US11823436

    申请日：2007-06-27

    申请人： Duen-Wu Hua ,  Michael C. Withiam ,  Francis R. W. Godwin ,  Fitzgerald A. Sinclair

    发明人： Duen-Wu Hua ,  Michael C. Withiam ,  Francis R. W. Godwin ,  Fitzgerald A. Sinclair

    IPC分类号： C01B33/154 ,  C01B33/14 ,  C01B33/152 ,  C01B33/157

    CPC分类号： C01B33/143 ,  C01B33/158 ,  C01B33/187 ,  C11B3/10

    摘要： New silica gel materials and novel methods of producing such are provided. The method itself entails a manner of mixing the reactants together in a one-pot process such that the time required for aging is reduced without compromising the ability to target pore size production. In such a way, the pH of the reaction drives pore size development, thereby permitting a more efficient process to be followed in terms of expensive drying/heating steps being reduced timewise, if not altogether. Furthermore, in one embodiment, the resultant gel materials exhibit a certain pore size minimum while simultaneously exhibiting a degree of softness heretofore unavailable. As such, not only is this novel method more efficient in silica gel manufacture, but the resultant materials are completely novel as well. The gel materials made therefrom may be utilized in a variety of different end uses, such as cooking oil filtration, soft skin cleansers, dental abrasives, and the like. Methods of production and use, as well as the novel gel materials themselves, particularly caustic and composite gels, are thus encompassed within this invention.

    摘要翻译： 提供了新的硅胶材料及其生产方法。 该方法本身需要一种在一锅法中将反应物混合在一起的方式，使得老化所需的时间降低，而不损害目标孔径生产的能力。 以这种方式，反应的pH驱使孔径显影，从而允许在昂贵的干燥/加热步骤方面遵循更有效的方法，如果不是完全减少时间的话。 此外，在一个实施方案中，所得凝胶材料表现出一定的孔径最小值，同时表现出迄今为止不可用的柔软程度。 因此，这种新方法不仅在硅胶制造中更有效，而且所得到的材料也是完全新颖的。 由其制成的凝胶材料可以用于各种不同的最终用途，例如烹饪油过滤，柔软的皮肤清洁剂，牙科磨料等。 因此，本发明包括生产和使用方法，以及新颖的凝胶材料本身，特别是苛性碱和复合凝胶。

    High velocity, low pressure process for making silica gels and microgels
    8.
    发明授权
    High velocity, low pressure process for making silica gels and microgels 失效
    制造硅胶和微凝胶的高速，低压工艺

    公开(公告)号：US07504084B2

    公开(公告)日：2009-03-17

    申请号：US11292012

    申请日：2005-12-01

    申请人： Walter N. Simmons ,  Walter J. Simmons

    发明人： Walter N. Simmons ,  Walter J. Simmons

    IPC分类号： C01B33/142 ,  C01B33/143

    CPC分类号： C01B33/154 ,  C01B33/143 ,  C01B33/146 ,  C01B33/152 ,  C02F1/5236 ,  C02F1/683 ,  D21H17/68 ,  D21H21/10

    摘要： This invention relates to a process for converting silica to polysilicate gels or hydrogels by combining an aqueous silica source with a CO2 feed stream as the gel initiator, whereby the reaction stream is propelled at high velocity and turbulence maintaining the CO2 uptake rate in the reaction stream. The invention also relates to a process for converting silica to polysilicate by pre-carbonating water at pressures of equal to or greater than 100 psig before initiating the polysilicate reaction.

    摘要翻译： 本发明涉及通过将水性二氧化硅源与CO 2进料流组合作为凝胶引发剂将二氧化硅转化为聚硅酸盐凝胶或水凝胶的方法，由此反应流以高速度和湍流推进，维持反应流中的CO 2吸收速率 。 本发明还涉及通过在开始聚硅酸盐反应之前将等于或大于100psig的压力预先水化水来将二氧化硅转化为聚硅酸盐的方法。

    Method for producing paper and agent for improving yield
    9.
    发明授权
    Method for producing paper and agent for improving yield 失效
    生产纸张和试剂以提高产量的方法

    公开(公告)号：US07504001B2

    公开(公告)日：2009-03-17

    申请号：US10509893

    申请日：2003-03-31

    申请人： Masanori Kosuga ,  Masatomi Ogawa ,  Yoshiaki Koga

    发明人： Masanori Kosuga ,  Masatomi Ogawa ,  Yoshiaki Koga

    IPC分类号： D21H11/00

    CPC分类号： D21H17/68 ,  C01B33/143 ,  D21H17/66 ,  D21H21/10

    摘要： The objective of the present invention is to provide a papermaking method that can enhance the retention in the papermaking steps. This invention provides a method including making paper by adding to pulp slurry a silica sol which is prepared through a reaction between an aqueous solution of sodium silicate and a mineral acid, and which has, under a SiO2 concentration from 15 to 50 g/L wherein the value of the concentration is shown by [C], a viscosity from 0.12×[C] mPa·s to 15 mPa·s measured at 25° C, and a cationic component and/or an amphoteric component.

    摘要翻译： 本发明的目的是提供一种可以增强造纸步骤中的保留性的造纸方法。 本发明提供了一种方法，包括通过向纸浆中加入通过硅酸钠水溶液和无机酸之间的反应制备的二氧化硅溶胶，并且其SiO 2浓度为15至50g / L，其中 浓度的值由[C]表示，在25℃下测量的0.12×[C] mPa.s至15mPa.s的粘度，以及阳离子组分和/或两性组分。

    Air filtration media comprising metal-doped precipitated silica materials
    10.
    发明申请
    Air filtration media comprising metal-doped precipitated silica materials 审中-公开
    包含掺杂金属的沉淀二氧化硅材料的空气过滤介质

    公开(公告)号：US20070020166A1

    公开(公告)日：2007-01-25

    申请号：US11186747

    申请日：2005-07-21

    申请人： Michael Withiam ,  Fitzgerald Sinclair

    发明人： Michael Withiam ,  Fitzgerald Sinclair

    IPC分类号： C01B33/12

    CPC分类号： C01B33/143 ,  C01B33/193

    摘要： The present invention relates generally to an environmental control unit for use in air handling systems that provides highly effective filtration of noxious gases (such as ammonia). Such a filtration system utilizes novel metal-doped precipitated silica materials to trap and remove such undesirable gases from an enclosed environment. Such silicas exhibit specific porosity requirements and density measurements. Furthermore, in order for proper metal doping to take effect, such precipitated silicas must be treated while in a wet state. The combination of these particular properties and metal dopant permits highly effective noxious gas filtration such that uptake and breakthrough results are attained, particularly in comparison with prior precipitated silica filtration products. Methods of using and specific filter apparatuses are also encompassed within this invention.

    摘要翻译： 本发明一般涉及一种用于空气处理系统的环境控制单元，其提供对有害气体（例如氨）的高效过滤。 这种过滤系统利用新颖的金属掺杂沉淀二氧化硅材料来从封闭环境中捕集和去除这些不需要的气体。 这种二氧化硅表现出特定的孔隙率要求和密度测量。 此外，为了适当的金属掺杂生效，这种沉淀二氧化硅必须在潮湿状态下进行处理。 这些特定性质和金属掺杂剂的组合允许高效有害的气体过滤，从而获得吸收和突破性结果，特别是与现有的沉淀二氧化硅过滤产物相比。 使用方法和特定的过滤装置也包括在本发明中。