利索-全球专利检索

  1. 登录
  2. 注册
发明公开
CN105731661A 一种脱钙剂及缓解水中结垢现象的方法 无效 - 驳回

一种脱钙剂及缓解水中结垢现象的方法
摘要：
本发明提供了一种脱钙剂及缓解水中结垢现象的方法。该脱钙剂包括：碱金属氢氧化合物3～15wt％，镁盐3～15wt％，氢氧化钙5～20wt％，以及水65～89wt％。上述脱钙剂可以使水中的部分Ca2+生成碳酸钙，同时调控油田水中残余的Ca2+浓度和CO32-浓度，使此时的Ca2+浓度和CO32-浓度乘积小于此情况下钙离子和碳酸根离子产生碳酸钙沉淀反应的沉淀平衡常数KSP，且镁盐的加入提高了碱金属氢氧化合物和氢氧化钙的利用率，使整个脱钙剂的脱钙效果得到充分发挥。
摘要（英）：

The present invention provides a decalcifying agent and water scaling phenomenon alleviation method. The decalcifying agent includes 3-15wt% of an alkali metal hydroxide compound, 3-15wt% of a magnesium salt, 5-20wt% of calcium hydroxide and 65-89wt% of water. The decalcifying agent allows part of Ca<2+> in water to produce calcium carbonate, and meanwhile regulates residual Ca<2+> concentration and CO3 <2-> concentration in oilfield water, so that the product of the Ca<2+> concentration and the CO3 <2-> concentration is less than precipitation equilibrium constant KSP of calcium carbonate precipitation reaction of Ca<2+> and CO3 <2-> under the conditions, the magnesium salt is added to improve the utilization rate of the calcium hydroxide and the alkali metal hydroxide compound, and decalcification effect of the decalcifying agent is fully played.

0/0