无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2012, Vol. 44 ›› Issue (1): 55-.

• 论文 • 上一篇    下一篇

湿法磷酸副产物氟硅酸制白炭黑连续工艺研究

吴立群1,2,梁雪松2,梅毅3,王汝春2,江城发1,杨云松2   

  1. 1.四川大学化学工程学院,四川成都 610065;2.云南省化工研究院;3.云天化集团有限责任公司
  • 出版日期:2012-01-10 发布日期:2012-01-16

Study on continuous technology of silica white using by-product fluosilicic acid from wet-process phosphoric acid

Wu Liqun1,2,Liang Xuesong2,Mei Yi3,Wang Ruchun2,Jiang Chengfa1,Yang Yunsong2   

  1. 1.School of Chemical Engineering,Sichuan University,Chengdu 610065,China;2.Yunnan Research Institute of Chemical Industry;3.Yuntianhua Group Co.,Ltd.
  • Published:2012-01-10 Online:2012-01-16

摘要: 以湿法磷加工过程的氟硅酸为原料,和氨水发生连续氨化反应,生成白炭黑和氟化铵。白炭黑作为一种性能优越的补强材料,有着广阔的市场;氟化铵可与强酸反应生产氢氟酸。连续氨化反应的优化条件为:氟硅酸质量分数为10%、氨水质量分数为10%、反应温度为20 ℃、搅拌转速为700 r/min、平均停留时间为15 min,在此条件下开展连续氨化反应,生成的白炭黑比表面积可达到350 m2/g,其他化学指标均达到HG/T 3061—1999质量标准。因此,此路线是氟硅酸综合利用较为有效的方法。

关键词: 氟硅酸, 白炭黑, 连续法, 比表面积

Abstract: Silica white and ammonium fluoride were prepared by using ammonia continually react with fluosilicic acid which is a by-product of wet-process phosphoric acid.As a reinforcing material with superior performance,silica white has a broad market;ammonium fluoride can be reacted with strong acid to form hydrofluoric acid.Optimized technologic conditions were as follows:the mass fraction of fluosilicic acid was 10%,the mass fraction of ammonia was 10%,the reaction temperature was 20 ℃,the stirring speed was 700 r/min,and average residence time was 15 min.Specific surface area of silica white produced under these technological conditions could reach 350 m2/g,and other chemistry indexes met with the quality requirements of HG/T 3061—1999.So this route is relatively effective for the integrated utilization of fluosilicic acid. 

Key words: fluosilicic acid, silica white, continuous process, specific surface

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