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无机盐对硅酸凝胶形成的影响 被引量:15

EFFECTS OF INORGANIC SALTS ON GELATION OF SILICIC ACID SOL
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摘要 用10 种无机盐对酸性和碱性硅酸溶胶进行处理,研究了无机盐对胶凝时间的影响。研究结果表明,一般情况下无机盐使胶凝时间缩短,但FeCl3 使酸性硅酸凝胶形成时间延长。本文还分析了正、负离子的作用机理,排列了各离子影响力的大小顺序。 The effects of inorganic salts on the gelation time of an acidic (pH=1.4) and an alkaline (pH=11.0) silicic acid sol (sodium silicate solution activated by hydrochloric or citric acid) at 60℃ are investigated experimentally. The salts selected are divided into two classes: chlorides of various metals( Na, K, Mg, Ca, Al, and Fe); sodium salts of various acids(chloride, bromide, thiocyanate, carbonate, and phosphate). It is shown that in general all the inorganic salts added decrease the gelation time besides FeCl 3 which increases the gelation time of the acidic silicic acid sol. The functioning mechanisms involved in gelation at the presence of salts are analyzed and the cations (for chlorides) and anions( for sodium salts) are arranged in order of increasing influencing power for every sol/salt class group.
出处 《油田化学》 CAS CSCD 北大核心 1999年第4期310-313,共4页 Oilfield Chemistry
关键词 硅酸钠 凝胶 无机盐 堵水剂 采油井 Sodium Silicate(Water Glass) Silicic Acid Sol Silicic Acid Gel Gelation Time Inorganic Salts
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参考文献5

  • 1陈宗淇 戴闽光.胶体化学[M].北京:高等教育出版社,1985.270,271,342.
  • 2赵福麟 陈东 臧金福.碱性硅酸凝胶堵水剂.石油大学学报:自然科学版,1988,12(4):54-62.
  • 3赵福麟,石油大学学报,1988年,12卷,4/5期,54页
  • 4陈宗淇,胶体化学,1985年,237页
  • 5黄汉仁,泥浆工艺原理,1981年,9页

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