稠油炼化污水处理用聚合硅磷硫酸铁的制备

Preparation of Polymeric Silicate Phosphate Ferrous Sulfate Used to Treat Wastewater from High-Viscosity Oil Petrification

以硫酸亚铁为主要材料,通过添加活化硅酸等组分,制备了一种新型的聚合硅磷硫酸铁絮凝剂.确定了其制备过程中的影响因素并通过实验确定了最佳制备条件:硫酸亚铁质量分数为55%,硅酸钠质量分数为15%,亚铁与双氧水用量的摩尔比为1.2∶1,氧化温度40℃,氧化时间4 h,聚合温度60℃,聚合时间2 h.通过均匀设计实验确定了制备聚合硅磷硫酸铁絮凝剂最佳组分:铁硅摩尔比为5.0∶1,铁酸摩尔比为3.2∶1,铁磷摩尔比为18.0∶1.在实验室最佳条件下,用制备得到的絮凝剂对稠油炼化污水进行絮凝处理,油的去除率可达到94.1%.

A new kind of flocculant, named polymeric silicate phosphate ferrous sulfate（PSPFS）, was synthesized with ferrous sulfate as main material and silicate and phosphate as additives. The influencing factors in the synthesis process of PSPFS were experimentally investigated to determine the optimal preparation conditions as follows. The mass fractions of ferrous sulfate and sodium silicate should be 55% and 15%, respectively, and the mole ratio of ferrous sulfate to hydrogen peroxide should be 1.2 ： 1. The oxidation temperature is 40 ℃ held for 4 h, and polymerization temperature is 60 ℃ for 2 h. Determined by homogeneous compound the optimal mole ratios of ferric ion to silicate, sulfuric acid and phosphate radical are 5.0 ： 1,3.2 ： 1 and 18.0：1, respectively. The experimental results showed that the flocculant synthesized under the conditions mentioned above is able to remove 94. 1% oil from high-viscosity oil petrification wastewater of Liaohe Pertrochemical Corporation.