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公开(公告)号：US06372806B1
公开(公告)日：2002-04-16
申请号：US09504320
申请日：2000-02-14
IPC分类号： C01B33141
CPC分类号： C01B33/1435 , C01B33/143 , D21H17/29 , D21H17/68 , D21H21/10
摘要： Disclosed are stable, aqueous colloidal silicas having surface area of greater than 700 m2/g and S-values of from 20-50. These colloidal silicas do not require treatment with surface treatment agents such as aluminum to achieve stability. These colloidal silica aquasols can be produced and stored at concentrations of greater than 7 percent by weight SiO2 solids, and even as high as 15 percent by weight solids or higher, and remain stable at room temperature for at least 30 days compared to art-known silica aquasols. These colloidal silica sols demonstrate advantageously improved performance over art-known colloidal silica sots in applications such as in drainage and retention in papermaking processes. Also disclosed are processes for making aqueous colloidal silicas of the invention and the use of such colloidal silicas in papermaking processes.
摘要翻译： 公开了表面积大于700m 2 / g且S值为20-50的稳定的水性胶体二氧化硅。 这些胶体二氧化硅不需要用表面处理剂如铝处理以达到稳定性。 这些胶体二氧化硅水溶胶可以以大于7重量％的SiO 2固体，甚至高达15重量％固体或更高的浓度生产和储存，并且在室温下保持稳定至少30天，与本领域已知的 二氧化硅水溶胶。 这些胶体二氧化硅溶胶在诸如在造纸过程中的排水和保留等应用中证明有利地改进了本领域已知的胶态二氧化硅沉淀物的性能。 还公开了制备本发明的水性胶体二氧化硅的方法以及这种胶体二氧化硅在造纸方法中的用途。
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公开(公告)号：US06486216B1
公开(公告)日：2002-11-26
申请号：US09604335
申请日：2000-06-27
IPC分类号： C01B33141
CPC分类号： C01B33/1435 , C01B33/143 , D21H17/29 , D21H17/68 , D21H21/10
摘要： A stable aquasol containing colloidal silica having a surface area of from about 700 m2/g to about 1100 m2/g, and an S-value of from about 20 to about 50; wherein the colloidal silica is not surface treated; wherein the molar ratio of SiO2/Na2O in the colloidal silica is greater than about 13.0:1 and is less than about 17.0:1; and wherein the aquasols have a percent by weight SiO2 solids level of from about 7.00 percent to about 16.80 percent is described and claimed.
摘要翻译： 一种稳定的含有胶体二氧化硅的水溶胶，其表面积为约700m 2 / g至约1100m 2 / g，S值为约20至约50; 其中所述胶体二氧化硅未进行表面处理; 其中所述胶体二氧化硅中SiO 2 / Na 2 O的摩尔比大于约13.0:1且小于约17.0:1; 并且其中所述水溶胶具有约7.00重量％至约16.80重量％的SiO 2固体含量的百分比。
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3.发明申请METHOD OF PRODUCING SILICA SOLS WITH CONTROLLABLE BROAD SIZE DISTRIBUTION AND MINIMUM PARTICLE SIZE 有权生产具有可控宽度分布和最小颗粒尺寸的硅溶胶的方法公开(公告)号：US20090018219A1
公开(公告)日：2009-01-15
申请号：US12237047
申请日：2008-09-24
申请人： Dennis L. MacDonald
发明人： Dennis L. MacDonald
IPC分类号： C01B33/14
CPC分类号： C01B33/141
摘要： Colloidal silica having a controllable broad particle size distribution and a controllable minimum particle size is disclosed and claimed. Particles below a predetermined size are excluded from the product colloidal silica of the invention. A method for continuously producing the desired colloidal composition is disclosed comprising the steps of providing preformed silica particles having a surface area which controls the particle size of the colloidal silica product, adding a feed silica comprising an alkaline solution and silicate at a feed rate which is less than a nucleation rate.
摘要翻译： 公开并要求保护具有可控宽粒度分布和可控最小粒度的胶体二氧化硅。 低于预定尺寸的颗粒从本发明的产品胶体二氧化硅中排除。 公开了一种用于连续制备所需胶体组合物的方法，其包括以下步骤：提供具有控制胶态二氧化硅产物粒度的表面积的预制二氧化硅颗粒，加入含有碱溶液和硅酸盐的进料二氧化硅，其进料速率为 小于成核速率。
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4.发明授权Method of producing silica sols with controllable broad size distribution and minimum particle size 有权生产具有可控的大尺寸分布和最小粒径的硅溶胶的方法公开(公告)号：US08052788B2
公开(公告)日：2011-11-08
申请号：US12237047
申请日：2008-09-24
申请人： Dennis L. MacDonald
发明人： Dennis L. MacDonald
CPC分类号： C01B33/141
摘要： Colloidal silica having a controllable broad particle size distribution and a controllable minimum particle size is disclosed and claimed. Particles below a predetermined size are excluded from the product colloidal silica of the invention. A method for continuously producing the desired colloidal composition is disclosed comprising the steps of providing preformed silica particles having a surface area which controls the particle size of the colloidal silica product, adding a feed silica comprising an alkaline solution and silicate at a feed rate which is less than a nucleation rate.
摘要翻译： 公开并要求保护具有可控宽粒度分布和可控最小粒度的胶体二氧化硅。 低于预定尺寸的颗粒从本发明的产品胶体二氧化硅中排除。 公开了一种用于连续制备所需胶体组合物的方法，其包括以下步骤：提供具有控制胶态二氧化硅产物粒度的表面积的预制二氧化硅颗粒，加入含有碱溶液和硅酸盐的进料二氧化硅，其进料速率为 小于成核速率。
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公开(公告)号：US4092436A
公开(公告)日：1978-05-30
申请号：US747572
申请日：1976-12-06
摘要： An improved method of stripping flavorful essential volatiles from a substrate, such as coffee or tea, which comprises contacting a uniform admixture of finely ground ice and the substrate in a suitable vessel with a stream of water vapor and thereby melting said ice, uniformly wetting said substrate and stripping said essential volatiles from said substrate; and collecting said volatiles in a cold trap.
摘要翻译： 一种从底物例如咖啡或茶中提取香味必需挥发物的改进方法，其包括将精细研磨的冰的均匀混合物与基材在合适的容器中与水蒸气流接触，从而使所述冰融化，均匀地润湿所述 从所述基底剥离所述基本挥发物; 并将所述挥发物收集在冷阱中。
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