湿法磷酸脱色脱氟实验研究  

Experimental study on defluorination and decolorization technology of wet-process phosphoric acid

作　　者：周刚[1] 余林春[1] 杜怀明[1] 

机构地区：[1]四川理工学院材料与化学工程学院,四川自贡643000

出　　处：《应用化工》2014年第8期1437-1438,1441,共3页Applied Chemical Industry

基　　金：四川省教育厅人文社科基地项目(SCKCZY2011-YB002);自贡市科技局项目(2013ZC07)

摘　　要：以活性炭为脱色剂、碳酸钠为脱氟剂,对净化湿法磷酸工艺中的影响因素进行研究,确定了湿法磷酸脱色脱氟同步进行的最佳工艺条件:采用1.0%湿法磷酸用量的活性炭,并添加1.1倍理论脱氟用量的Na2CO3,在50℃下反应120 min,处理后的湿法磷酸透光率达到80%以上,脱氟率也高于70%。The influencing factors of purified wet-process phosphoric acid with activated carbon and Na2 CO3 as decoloring agent and defluorinating agent were studied. The best technological conditions were as follows：dosage of activated carbon was 1. 0% of wet-process phosphoric acid,dosage of Na2 CO3 was 1. 1 times theoretical amount,reaction temperature was 50 ℃ and time was 120 min. Under these condi-tions,light transmittance reached above 80% and the defluorination rate reached above 70%.

关 键 词：湿法磷酸 脱色 脱氟 

分 类 号：TQ126.35[化学工程—无机化工]