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    • 2. 发明授权
    • Precipitated silica
    • 沉淀二氧化硅
    • US5871867A
    • 1999-02-16
    • US954858
    • 1997-10-21
    • Ralf RauschHeinz EschRobert KuhlmannGuenter TuerkKarl MeierWalter Meon
    • Ralf RauschHeinz EschRobert KuhlmannGuenter TuerkKarl MeierWalter Meon
    • C01B33/143C01B33/18C01B33/193C08K3/36C08L23/06H01M2/14H01M2/16
    • H01M2/14C01B33/193H01M2/1646C01P2004/51C01P2004/61C01P2006/12C01P2006/19C01P2006/80C01P2006/82
    • Precipitated silica with a sodium sulphate content of 4 to 18 wt. %, particularly with the physical-chemical data:______________________________________Sodium sulphate content: 4-14 wt. %BET surface area (DIN 66131): 100-190 m.sup.2 /gDBP absorption (anhydrous) 208-250 g/100 g(DIN 53601, ASTM D 2414): 3.0-6.5 wt. %(DIN ISO 787/II)Oversize with >63 .mu.m .ltoreq. 10.0 wt. %ALPINE air-jet sieve >150 .mu.m .ltoreq. 0.1 wt. % >250 .mu.m .ltoreq. 0.01 wt. %______________________________________It is prepared by introducing hot water into a precipitation vessel, with stirring, adding water glass, then heating the mixture and maintaining the temperature throughout the remainder of the precipitation period. Water glass and sulphuric acid are added simultaneously during this process. The precipitated silica is then separated from the suspension and the filter cake containing sodium sulphate is dried in a spray drier and ground. The precipitated silica may be used in the production of battery separators.
    • 硫酸钠含量为4〜18重量%的沉淀二氧化硅 %,特别是物理化学数据: - 硫酸钠含量:4-14重量% % - BET表面积(DIN 66131):100-190m2 / g-DBP吸收(无水)208-250g / 100g - (DIN 53601,ASTM D 2414):3.0-6.5wt。 % - (DIN ISO 787 / II) - >63μm超大,10.0wt。 % - ALPINE喷气筛>150μm0.1重量% % - >250μm<0.01wt。 % - 通过将热水引入沉淀容器中,在搅拌下加入水玻璃,然后加热混合物并在整个沉淀期的剩余时间内保持温度而制备。 在此过程中同时加入水玻璃和硫酸。 然后将沉淀的二氧化硅与悬浮液分离,并将含有硫酸钠的滤饼在喷雾干燥器中干燥并研磨。 沉淀二氧化硅可用于生产电池隔板。