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›› 2003, Vol. 3 ›› Issue (2): 0-0.

• 2 •    

溶气气浮法采收盐藻(Dunalilla salina)细胞

崔景芹，郑毅，丛威，蔡昭铃   

  1. 1. 中国科学院过程工程所生化工程国家重点实验室，北京 100080； 2. 北京化工大学化学工程学院，北京 100029
  • 出版日期:2003-04-20 发布日期:2003-04-20

Preparation of Monodisperse Silica Ultramicrons

WANG Ling-lingl，FANG Xiao-longl，TANG Fang-qiong2，YANG Chuan-fangl， LIU Hui-Zhoul   

  1. Research Institute of Chemical Engineering , Jishou University, Jishou, Hunan 416000, China
  • Online:2003-04-20 Published:2003-04-20

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摘要： 初步探讨了不添加絮凝剂和表面活性剂时用溶气气浮法采收盐藻细胞的工艺条件，结果表明，藻液pH值、溶气压(PS)、溶气水进水流量(QW)、溶气水/原料藻液体积比(水液比aWF)对采收效果有重要影响. 本实验条件下，调节藻液pH值为11.5, 在PS＝0.39 MPa, QW＝7 ml/s, aWF＝1.5的气浮操作条件下，细胞采收率和浓缩倍数分别达86.4%~96.4%和2.38~5.57. 表明气浮法可以安全、高效地从培养液中采收盐藻细胞，无需添加絮凝剂.

关键词: 盐藻, 溶气气浮, 采收

Abstract: The main factors that affect the leaching rate of potassium in potash feldspar were studied. It is shown that the best reaction conditions are reaction temperature of 890~950oC, size of potash feldspar ores below 0.208 mm, and the weight ratio of sodium chloride to potash feldspar ores being 1. The study showed that the leaching process is controlled by the internal ionic diffusion of Na+ and K+ in potash feldspar. The relations between diffusion coefficient and reaction temperature is expressed by the Arrhenius formula: Deff=D0exp(-–Ea/RT), with Ea = 81.42 kJ/mol, D0=0.324 mm2/h.

Key words: silica, reverse micelles, ultramicron, TEOS(tetraethylorthosilicate), Stober method, monodisperseparticles

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