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发明名称
含氟硅胶制高补强白炭黑的工艺方法
摘要
本发明是利用普钙废硅胶为原料,溶于氟化铵溶液中,制得氟硅酸铵溶液。再采用分两段加氨水的方式分解沉淀出二氧化硅,滤饼用不同浓度的稀氟化铵溶液和清水分5步洗涤,然后干燥,得到比表面积为100—250m<SUP>2</SUP>/g的白炭黑产品。
申请公布号
CN1039111C
申请公布日期
1998.07.15
申请号
CN93103463.9
申请日期
1993.03.24
申请人
化工部天津化工研究院
发明人
宁延生;徐世增
分类号
C01B33/113;C09C3/06
主分类号
C01B33/113
代理机构
代理人
主权项
1.一种橡胶填料用高补强白炭黑的制备方法,是以普钙磷肥副产的废硅胶为原料,溶于氟化铵溶液中,加热共沸,生成氟硅酸铵溶液,然后加氨水分解沉淀出二氧化硅,再经过滤、洗涤、干燥得产品,其特征是将氨水分为两段分别加入氟硅酸铵溶液中,第一段加入氨水总量的10-30%,第二段加入剩余的氨水,过滤后,滤饼分5步洗涤,前四步用稀氟化铵溶液洗涤,第5步用清水洗涤,洗涤母液循环利用。
地址
300131天津市红桥区丁字沽三号路
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