以含铁酸洗废液为主要原料,用铁粉对其作除酸处理后,与亚铁氰化钾反应,生成白浆,用氯酸钾氧化,经过滤、洗涤、干燥、研磨,制备出了深蓝色无机颜料———钾铁蓝。通过正交实验和单因素分析,研究由含铁酸洗废液制备钾铁蓝的最佳工艺条件。结果表明,在Fe2+和亚铁氰化钾的量比1.15∶1,反应温度90℃,含铁酸洗废液pH=1,相对酸度为3的反应条件下,得到了含铁量为30.32%,吸油量为0.45 mL/g的钾铁蓝产品,颗粒大小均匀,粒径100~200 nm,钾铁蓝的结构与Fe4[ Fe( CN)6]3相似,且各项指标均符合化工行业标准HG/T 3001—1999。%Potassium iron blue of high quality was prepared with iron containing steel pickling waster liq-uor. The optimum experimental conditions for preparation of potassium iron blue were the molar ratio of Fe2+ to K4Fe(CN)6 was 1. 15∶1. 00,reaction temperature was 90 ℃,pH value was 1,relative sulfuric a-cidity was 3 which was studied by orthogonal experiment and single-factor experiment. The total iron con-tent and the oil absorption value of potassium iron blue was 30. 32% and 0. 45 mL/g. Particle size distri-bution was uniform and between 100 ~200 nm, the structure of potassium iron blue was similar to Fe4 [ Fe( CN) 6 ] 3 ,and the quality of potassium iron blue was accorded with the industrial standard ( HG/T 3001—1999 ) .
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