钛白废酸制备聚合硫酸铁的资源化利用  

Resource utilization of titanium dioxide waste acid for preparation of polyferric sulfate

作　　者：潘邻屹 邰石君 张旭杰 唐雪梅 马磊 PAN Linyi;TAI Shijun;ZHANG Xujie;TANG Xuemei;MA Lei(Guizhou Shengwei Research Institute of New Chemical Materials Co.,Ltd.,Guiyang 550014,China;Guizhou Shengwei Fuquan Chemical Co.,Ltd.,Fuquan 550508,China)

机构地区：[1]贵州胜威化工新材料研究院有限公司,贵州贵阳550014 [2]贵州胜威福全化工有限公司,贵州福全550508

出　　处：《工业水处理》2025年第2期104-108,共5页Industrial Water Treatment

基　　金：黔科中引地项目([2022]4019);黔科合支撑项目([2023]一般463);黔科合成果项目([2023]一般627);黔南科合项目([2022]17号);黔南科合项目([2022]14号)。

摘　　要：将钛白粉生产过程中产生的质量分数18%~25%的废酸(硫酸)蒸发浓缩,得到一水硫酸亚铁和质量分数约55%的浓缩废酸,分析表明,一水硫酸亚铁平均产率为17.33%,内含Pb、Zn、Hg、Cr、Ni等杂质。将一水硫酸亚铁除杂处理后,通过氧化、水解、聚合等反应制备聚合硫酸铁高分子混凝剂,工艺研究结果表明,当氧化剂H_(2)O_(2)投加量为理论量的1.5倍、酸铁比在0.2~0.35之间时,所得终产品PFS溶液中Fe^(2+)质量分数低于0.1%,总铁质量分数为11.12%,pH=1.6,盐基度为14.5%,密度为1.48 g/cm^(3),不溶物≤0.1%,其他金属离子浓度均较低,满足《水处理剂聚合硫酸铁》(GB/T 14591—2016)中合格品标准。During the production process of titanium dioxide,waste acid(sulfuric acid)with mass fraction of 18%-25%is generated.The waste acid was evaporated and concentrated to obtain ferrous sulfate monohydrate and concentrated waste acid with a mass fraction of about 55%.Analysis showed that the average yield of ferrous sulfate monohydrate was 17.33%,containing impurities such as Pb,Zn,Hg,Cr,Ni,etc.After removing impurities from ferrous sulfate monohydrate,polymeric ferric sulfate polymer coagulant solution was prepared through oxidation,hydrolysis,polymer-ization and other reactions.The results of process research showed that when the dosage of oxidant H_(2)O_(2) was 1.5 times of the theoretical dosage and the acid iron ratio was between 0.2 and 0.35,the final product PFS solution had a Fe^(2+)mass fraction of less than 0.1%,a total iron mass fraction of 11.12%,pH=1.6,a basicity of 14.5%,a density of 1.48 g/cm^(3),insoluble matter content less than 0.1%,and other metal ion concentrations were low,which met the quali-fied product standards of Water Treatment Chemicals-Poly Ferric Sulfate(GB/T 14591-2016).

关 键 词：一水硫酸亚铁 钛白废酸 聚合硫酸铁 混凝剂 

分 类 号：O65[理学—分析化学]