螯合络合剂法去除活性炭生产回收磷酸液中的铁离子.pdf

第32卷第6
化学丁业与丁程技术
2011年12月
Jnurrai af Chemical Industry & Engineprrg
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螯合络合剂法去除活性炭生产
回收磷酸液中的铁离子
黄风妹
福鍵省危險化学品产品质量隘督检验中心,福建南平353000
摘要:淅性炭牛产中磷酸液进行活化,礫酸液可复收利用。由于木屑、炭屑等原材料的影响,
用于反复活化浸渍的酸液中鉄质量分数将从小于1×10-上升到数百×10)、甚至更高、不能满足
医约、食品等行业对铁离子含量要求较高的活性炭生产之需。采用二甲基肼、15%酸液、二硫化碳3
种药品于…一定条件下反应,制得了螯合络合沉淀剂,于常温下可将问收来的磷酸圩液中的铁离子除去,
蜍铁效果显著、达到50X10以下,从而使回收的憐酸液满足医约、食品等行业用活性炭的生广要求
该法工艺简单、成本低,且不引入杂质离子,是一种值得推广的应用技术
关键词:磷酸法牛产活性炭冋收磷酸液螯合络合沉淀剂铁离
中图分类号:()652文献标识码:A文章编号:1006-7906(2011)06-0011-03
Removal of iron ion in recovered phosphoric acid solution of activated
carbon production by chelating complexing agents
HUANG Fen gmres
Fujian Provincc Dangcrol:s Chemical Prodi: ct Quality Supervision and Inspcetion Center. Nanping 353000,China)
Abstract: Phosphoric acid is used in activated carbon production for activation and can be reused. ecause of hc effects of
bits of wood and car on dust in raw materials. the mass fraction of iron in recovered phosphoric acid solution will increase fro
lower than 10 X 10 to 10 and evwn higher, and the rcsult is that the activated carbon products can not be satisfied the de
mand of medicine, food and other industries in which the iron content is limited. A kind of chelating complexing agent is prc
pared by dimethy ne, 15% phosphoric acid solution and carhon disulfide reacting in conrolled conditior. This chelating
complexing agent can be used in removing iron ion in recovered phosphoric acid solution and the effect is obvious. The mass
fraction o[ iror ion after trealment can be lower than 50 X 10",and the treated recovered phosphoric acic solution can meet the
demand of activated carbon production for medicine, food and other industrics. The method has advantages of simplc process
low cost and avoid foreign ion, which is n technology deserves to popularize.
Key words: Activated carbon production by phosphoric acid; Recevered phosphoric acid solution; Chelating complexing a
gent; Jron ion
有些活性炭生产企业采用磷酸液对木屑进行易使离子交换树脂发生“中毒”现象;用化学沉淀法
炭化活化,嵽酸液可重复回收利用,傾此时磷酸液除铁离子,如亚铁氰化钾、铁氰化钾去除铁离子,生
中铁离子的含量将大大增加,不能满足医劣、食品等成的蓝色沉淀颗粒细,不易过滤,且污染环境;用高
行业对铁离子含量要求较高的活性炭生产之。降
低回收礫酸液的铁离子含量·提高其可利用度,具有收稿日期:2011-07-01。
较大的经济效益
作者简介:黄风妹(1977-),女,福建南平人,本科,工程师,主要从
回收来的磷酸液用离子交换树脂除铁效果不理事化工、食品的检
想,存在着离子交换树脂的再生问题,而铁离子又较基金项自:南半市科技项目课题(2010C085)
万方数据