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。