化学工程2012，Vol.40Issue(8)：24-28,41,6.DOI:10.3969/j.issn.1005-9954.2012.08.006
两亲聚合物对湿法磷酸的助滤性能及机理研究
Performance and mechanism of amphiphilic copolymer for filter aids on wet-process phosphoric acid
摘要
Abstract
An amphiphilic copolymer PADA-10 which was applied to filtration aiding on wet-process phosphoric acid was synthesized with self-made monomer A, acrylamide (AM), dimethyl diallyl ammonium chloride (DMDAAC) as feedstock and with persulfate as initiator in aqueous solution. The filtration aiding effects of PADA-10 were studied, and the results show that the filtration rate of the phosphoric acid slurry can be increased by about 4. 3 times and the water content of the filter cake can be reduced by about 10.8% , compared with the blank group. The filtration aiding mechanism of PADA-10 was preliminarily studied, and the results show that PADA-10 can neutralize the surface charge of the phosphogypsum within a certain pH range and can make the microcrystal grains flocculate to conglobation, moreover, PADA-10 can increase the porosity of filter cake. The results also indicate that PADA-10 can enhance the hydrophobicity of the phosphogypsum, the surface tension of the filtrate is reduced by 5.2 mN/m, and the surface contact angle of the phosphogypsum is increased by 3.4° with addition of PADA-10, respectively.关键词
两亲聚合物/助滤/磷酸料浆/机理Key words
amphiphilic copolymer/ filtration aiding/ phosphoric slurry/ mechanism分类
化学化工引用本文复制引用
杜光超,费德君,武建勋,党亚固,刘勇..两亲聚合物对湿法磷酸的助滤性能及机理研究[J].化学工程,2012,40(8):24-28,41,6.基金项目
国家科技支撑计划项目(20078AE58B01) （20078AE58B01）
