公开(公告)号：US06372806B1

公开(公告)日：2002-04-16

申请号：US09504320

申请日：2000-02-14

Applicant: Bruce A. Keiser ,  Maureen B. Nunn ,  Cheng-Sung Huang ,  Dennis L. MacDonald

Inventor： Bruce A. Keiser ,  Maureen B. Nunn ,  Cheng-Sung Huang ,  Dennis L. MacDonald

IPC: C01B33141

CPC classification number: C01B33/1435 ,  C01B33/143 ,  D21H17/29 ,  D21H17/68 ,  D21H21/10

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US5164096A

公开(公告)日：1992-11-17

申请号：US786626

申请日：1991-11-01

Applicant: Maureen B. Nunn

Inventor： Maureen B. Nunn

IPC: A01N25/28 ,  C02F1/50

CPC classification number: C02F1/50 ,  A01N25/28 ,  Y10S210/928 ,  Y10S514/963 ,  Y10T428/2984 ,  Y10T428/2989

Abstract: Biocide treatment of the water system of a papermaking process comprising the steps of encapsulating the biocide as the core of the capsule in a water suspension, in which the shell is degradable at high water dilution, and introducing the microcapsules into the water stream to undergo dilution release.

Abstract translation: 生物处理造纸方法的水系统包括以下步骤：将作为胶囊核心的杀生物剂包封在水悬浮液中，其中壳可在高水稀释下降解，并将微胶囊引入水流进行稀释 发布。

公开(公告)号：US06486216B1

公开(公告)日：2002-11-26

申请号：US09604335

申请日：2000-06-27

Applicant: Bruce A. Keiser ,  Maureen B. Nunn ,  Cheng-Sung Huang ,  Dennis L. MacDonald

Inventor： Bruce A. Keiser ,  Maureen B. Nunn ,  Cheng-Sung Huang ,  Dennis L. MacDonald

IPC: C01B33141

CPC classification number: C01B33/1435 ,  C01B33/143 ,  D21H17/29 ,  D21H17/68 ,  D21H21/10

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US5840158A

公开(公告)日：1998-11-24

申请号：US834915

申请日：1997-04-07

Applicant: Pek Lee Choo ,  Bruce A. Keiser ,  Michio Kobayashi ,  Maureen B. Nunn ,  David A. Picco ,  Kristine S. Salmen

Inventor： Pek Lee Choo ,  Bruce A. Keiser ,  Michio Kobayashi ,  Maureen B. Nunn ,  David A. Picco ,  Kristine S. Salmen

IPC: C02F1/52 ,  C02F1/54 ,  C02F1/56 ,  D21H17/29 ,  D21H17/45 ,  D21H17/56 ,  D21H17/68 ,  D21H21/10

CPC classification number: D21H21/10 ,  C02F1/5236 ,  C02F1/54 ,  C02F1/56 ,  D21H17/29 ,  D21H17/455 ,  D21H17/56 ,  D21H17/68

Abstract: A method for the manufacture of paper comprising the steps of: a) forming an aqueous cellulosic papermaking slurry; b) adding an effective coagulating amount of a coagulant and a flocculant to said cellulosic papermaking slurry, wherein said coagulant is prepared by blending i) an effective coagulating amount of an aqueous conditioned colloidal silica sol with an average particle size within the range of from 1 to 150 nm and wherein the aqueous colloidal silica sol is conditioned by contacting said sol with a strong acid cation exchange resin, and ii) an effective coagulating amount of a cationically-charged water-soluble polymeric coagulant; c) draining said cellulosic suspension to form a sheet; and, d) drying said sheet. The components of the invention are blended together so that addition is simultaneous. The colloidal silica is conditioned by passing over a cationic exchange resin prior to addition of cationic polymer. The term conditioned as used herein refers to the act of passing the colloidal silica over a cationic exchange resin.

Abstract translation: 一种制造纸的方法，包括以下步骤：a）形成水性纤维素造纸浆料; b）向所述纤维素造纸浆液中加入有效凝固量的絮凝剂和絮凝剂，其中所述絮凝剂是通过将i）有效凝固量的水性调理胶体二氧化硅溶胶的平均粒度在1 通过使所述溶胶与强酸阳离子交换树脂接触来调节水性胶​​体二氧化硅溶胶，和ii）有效凝结量的阳离子电荷的水溶性聚合物凝结剂; c）排出所述纤维素悬浮液以形成片材; 和d）干燥所述片材。 将本发明的组分混合在一起，使得添加是同时进行的。 在加入阳离子聚合物之前，通过使阳离子交换树脂通过来调节胶体二氧化硅。 如本文所用的术语条件是指将胶体二氧化硅通过阳离子交换树脂的作用。

公开(公告)号：US06372089B1

公开(公告)日：2002-04-16

申请号：US09504319

申请日：2000-02-14

Applicant: Bruce A. Keiser ,  Maureen B. Nunn ,  Cheng-Sung Huang ,  Dennis I. MacDonald

Inventor： Bruce A. Keiser ,  Maureen B. Nunn ,  Cheng-Sung Huang ,  Dennis I. MacDonald

IPC: D21H1768

CPC classification number: C01B33/1435 ,  C01B33/143 ,  D21H17/29 ,  D21H17/68 ,  D21H21/10

Abstract: 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 sols 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.

Abstract translation: 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本领域已知的胶体二氧化硅溶胶的应用中，例如在造纸方法中的排水和保留方面，显示出有利地提高的性能。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。

公开(公告)号：US5413680A

公开(公告)日：1995-05-09

申请号：US100755

申请日：1993-08-02

Applicant: Maureen B. Nunn

Inventor： Maureen B. Nunn

IPC: D21F1/32

CPC classification number: D21F1/32

Abstract: A method of detecting microbiological fouling of felts used in paper making machines is described. A felt suspected of containing microbiological deposits is contacted with iodonitrotetrazolium and then examined for a predetermined color change confirming the presence of bacteria on the felt. The felt assumes a red color in the presence of at least one million colony forming units of bacteria per gram of dry felt within thirty minutes after the iodonitrotetrazolium has contacted the felt.

Abstract translation: 描述了一种检测造纸机中使用的毛毡微生物结垢的方法。 怀疑含有微生物沉积物的毛毡与碘硝基四唑接触，然后检查确认毛毡上存在细菌的预定颜色变化。 在碘硝基四唑接触毛毡后的三十分钟内，每克干燥毡中至少有一百万菌落形成单位细菌的毛发呈红色。