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129 条记录 (耗时 0.014 秒)

    Silica gel of improved properties and process of making same
    32.
    发明授权
    Silica gel of improved properties and process of making same 失效
    改善性能的硅胶及其制造工艺

    公开(公告)号：US4148864A

    公开(公告)日：1979-04-10

    申请号：US747474

    申请日：1976-12-06

    申请人： Wilhelm Groth ,  Peter Hussmann

    发明人： Wilhelm Groth ,  Peter Hussmann

    IPC分类号： C01B33/154 ,  C01B33/16 ,  C01B33/32 ,  C01B33/12

    CPC分类号： C01B33/16 ,  C01B33/154 ,  C01B33/32

    摘要： A silica gel of improved hardness and abrasion resistance, increased adsorption power, and other valuable properties is produced by a highly economic process. A useful manufacturing system for making such silica gel and a simple apparatus for producing silica gel spheres of considerably larger diameter than heretofore known are provided.

    摘要翻译： 通过高度经济的工艺生产具有改善的硬度和耐磨性，增加的吸附力和其它有价值的性质的硅胶。 提供了一种制造这种硅胶的有用的制造系统和用于生产比迄今已知的更大直径的硅胶球的简单设备。

    Method of selectively producing high pore volume silica gel
    33.
    发明授权
    Method of selectively producing high pore volume silica gel 失效
    选择性生产高孔体积硅胶的方法

    公开(公告)号：US3959174A

    公开(公告)日：1976-05-25

    申请号：US322570

    申请日：1973-01-10

    申请人： Milton E. Winyall ,  Ellsworth G. Acker

    发明人： Milton E. Winyall ,  Ellsworth G. Acker

    IPC分类号： C01B33/154 ,  C01B33/16 ,  B01J13/00 ,  C01B33/14

    CPC分类号： C01B33/154 ,  C01B33/166

    摘要： High pore volume silica materials are useful as thickening, reinforcing and flatting agents. This invention comprises selectively forming silica gels having pore volumes in the range of 1.2 to 3.0 cc/g. These high pore volume silica gels can be produced by the alkaline gelation of a mixture of silicate and ammonium hydroxide at a pH of from 10.6 to 11.2, using a water soluble silica desolubilizing agent selected from the group consisting of ammonia, monohydric alcohols, glycols, ketones and salts. The silica is then aged, neutralized, optionally aged a second time, filtered and washed. This silica may then be dried and directly used, or it may be milled to a smaller size. For use as a thickening agent, the silica is milled in a fluid energy mill to an average particle size of less than about 1 micron, and preferably to less than 0.5 micron.

    摘要翻译： 高孔体积二氧化硅材料可用作增稠剂，增强剂和消光剂。 本发明包括选择性地形成孔体积在1.2-3.0cc / g范围内的硅胶。 这些高孔体积的硅胶可以通过硅酸盐和氢氧化铵的混合物在10.6至11.2的pH下碱性凝胶化来制备，使用水溶性二氧化硅脱溶剂，其选自氨，一元醇，二醇， 酮和盐。 然后将二氧化硅老化，中和，任选地老化第二次，过滤并洗涤。 然后可以将该二氧化硅干燥并直接使用，或者将其研磨成较小的尺寸。 为了用作增稠剂，将二氧化硅在流体能量磨中研磨至平均粒度小于约1微米，优选小于0.5微米。

    Preparation of silica gels
    34.
    发明授权
    Preparation of silica gels 失效

    公开(公告)号：US3819811A

    公开(公告)日：1974-06-25

    申请号：US23831372

    申请日：1972-03-27

    申请人： NAT PETRO CHEM

    发明人： ABOUTBOUL H ,  KREKELER J ,  KIRCH W

    IPC分类号： B01J20/10 ,  B01J21/08 ,  B01J35/10 ,  C01B33/113 ,  C01B33/154 ,  C01B33/16

    CPC分类号： C01B33/16 ,  B01J20/103 ,  B01J21/08 ,  B01J35/10 ,  B01J35/1019 ,  B01J35/1047 ,  B01J35/1061 ,  B01J35/1085 ,  C01B33/113 ,  C01B33/154 ,  C01B33/1543

    摘要： SILICA XEROGELS HAVING A NARROW PORE DIAMETER DISTRIBUTION IN THE RANGE OF 300-600A., SULFACE AREAS IN THE RANGE FROM 200 TO 500 M.2/G., AND PORE VOLUMES IN THE RANGE OF 2.0-3.5 CM.3/G. AND A PROCESS FOR PREPARING SUCH SILICA XEROGELS COMPRISING CRITICALLY CONTROLLED STEPS OF PRECIPITATION OF THE SILICA GEL, AGEING THE PRECIPITATED SILICA HYDROGEL SLURRY, WASHING THE AGED PRODUCT, AND REMOVING THE WATER FROM THE GEL WITH, WHERE NECESSARY, DURING THE GEL. THE WATER IS REMOVED IN SUCH A MANNER THAT THE SURFACE TENSION EXERTED UPON THE GEL, DURING DRYING, IS LESS THAN THAT SURFACE TENSION WHICH WOULD RESULT FROM THE DIRECT CONVERSION OF LIQUID WATER TO WATER VAPOR. TYPICAL TECHNIQUES WHICH MAY BE EMPLOYED ARE: (A) DISPLACING THE WATER IN GEL WITH AN ORGANIC LIQUID SUBSTANTIALLY COMPLETELY MISCIBLE WITH WATER AND THEN DRYING THE GEL; (B) VACUUM FREEZE-DRYING THE GEL; OR (C) ADDING A WATERIMMISCIBLE SOLVENT, WHICH FORMS AN AZEOTROPE WITH WATER WHEN DISTILLED, TO THE GEL, DISTILLING THE AZEOTROPE TO REMOVE SUBSTANTIALLY ALL OF THE WATER FROM HE GEL UNDER A SPECIFIC CONDITIONS AND DRYING THE GEL FROM ANY REMAINING SOLVENT.

    Preparation of silica gels
    35.
    发明授权
    Preparation of silica gels 失效
    二氧化硅凝胶的制备

    公开(公告)号：US3652216A

    公开(公告)日：1972-03-28

    申请号：US3652216D

    申请日：1968-10-11

    申请人： NAT PETRO CHEMICALS CO INC

    发明人： KREKELER JEROME H ,  ABOUTBOUL HENRI A ,  KIRCH WILLIAM

    IPC分类号： B01J20/10 ,  B01J21/08 ,  B01J35/10 ,  C01B33/113 ,  C01B33/154 ,  C01B33/16 ,  C08F10/02

    CPC分类号： C01B33/113 ,  B01J20/103 ,  B01J21/08 ,  B01J35/1019 ,  B01J35/1061 ,  B01J35/1066 ,  C01B33/154 ,  C01B33/1543 ,  C01B33/16 ,  C08F10/02 ,  C08F4/24 ,  C08F4/025

    摘要： Silica xerogels having a narrow pore diameter distribution in the range of 300-600 A. and surface areas in the range from 200500 m.2/g. and the process of preparing such xerogels comprising critically controlled steps of precipitation of the silica gel, heat aging the precipitated silica hydrogel slurry, washing the aged product with solutions of salts having displacing effect on sodium, disintegrating the gel, drying the gel by azeotropic distillation with a solvent which is nonmiscible with water, and calcining. Also, a process for preparing such xerogels wherein the non-water miscible solvent is continuously recycled so that a minimum amount of solvent need be used.

    摘要翻译： 二氧化硅干凝胶的孔径分布窄，范围为300-600A，表面积为200-500m2 / g。 以及制备这种干凝胶的方法，包括严格控制的硅胶沉淀步骤，使沉淀的二氧化硅水凝胶浆料加热老化，用钠溶液洗涤老化产物，将凝胶分解，通过共沸蒸馏干燥凝胶 用与水不溶的溶剂和煅烧。 另外，制备这样的干凝胶的方法，其中非水混溶性溶剂被连续循环，以便需要使用最少量的溶剂。

    Preparation of silica gels
    36.
    发明授权
    Preparation of silica gels 失效
    二氧化硅凝胶的制备

    公开(公告)号：US3652214A

    公开(公告)日：1972-03-28

    申请号：US3652214D

    申请日：1968-08-06

    申请人： NAT PETRO CHEMICALS CO INC

    发明人： ABOUTBOUL HENRI A ,  KREKELER JEROME H ,  KIRCH WILLIAM

    IPC分类号： B01J20/10 ,  B01J21/08 ,  B01J35/10 ,  C01B33/113 ,  C01B33/154 ,  C01B33/16 ,  C08F10/02

    CPC分类号： C08F10/02 ,  B01J20/103 ,  B01J21/08 ,  B01J35/1019 ,  B01J35/1066 ,  B01J35/1071 ,  C01B33/113 ,  C01B33/154 ,  C01B33/1543 ,  C01B33/16 ,  C08F4/025 ,  C08F4/24

    摘要： Silica gels having narrow pore diameter distribution in the range of 300-600 A and surface areas in the range from 200-500 m.2/g., and the process of preparing such silica gels directly from water, comprising critically controlled steps of precipitation of the silica gel, heat aging the precipitated silica hydrogel slurry, washing the aged product with solutions of salts having a displacing effect on sodium, disintegrating the gel and freeze drying the hydrogel so as to remove substantially all of the water i.e., vacuum subliming the water from the gel after freezing said hydrogel particles at a temperature sufficient to maintain the water in the pores in the frozen state.

    摘要翻译： 具有300-600A范围内窄孔径分布和200-500m2 / g范围内的表面积的二氧化硅凝胶，以及直接由水制备这种硅胶的方法，包括严格控制的沉淀步骤 的硅胶，对沉淀的二氧化硅水凝胶浆进行热老化，用钠溶液洗涤老化产物，分解凝胶并冷冻干燥水凝胶，以便基本上除去所有的水，即真空升华 在将所述水凝胶颗粒在足以将毛孔中的水保持在冷冻状态的温度下冷冻之后，从凝胶中取出水。