摘要
通过ξ电位、吸附作用规律、药剂基团电负性理论及红外吸收光谱法论述了１羟基２萘羟肟酸对氟碳铈矿的捕收性能及作用机理。１羟基２萘羟肟酸主要是以羟肟基上的两个氧原子与氟碳铈矿表面的Ｒｅ（Ⅲ）形成了Ｏ—Ｃ＝Ｎ—Ｏ—Ｒｅ（Ⅲ）—Ｏ五元环的螯合物而化学吸附，同时兼有多层的、不均匀的物理吸附，吸附方程Γ＝６．７６×１０－２·Ｃ１／１．０２，吸附速率常数Ｋ＝２．６４×１０５ｍ２·ｍｏｌ－１·ｍｉｎ－１。
The collecting behaviour of bastnaesite with 1 hydroxy 2 naphthyl hydroxamic acid was investigated and its mechanism was discussed by ξ potential measurement, law of adsorption, means of theoretical calculation on the group electronegativity and method of infrared absorption spectrum. The result showed that two oxygen atoms from 1 hydroxy 2 naphthyl hydroxamic acid chelate RE(Ⅲ) on the surface of bastnaesite forms five chain O C=N O RE(Ⅲ) O chelate which is chemically adsorbed on the surface of bastnaesite, together with the polylaminate. The nonhomogeneous physical adsorption equation is Г =6.76×10 -2 · C 1/1.02 . The constant of adsorption velocity is K =2.64×10 5 m 2·mol -1 ·min -1 .
出处
《中国有色金属学报》
EI
CAS
CSCD
1996年第4期24-28,共5页
The Chinese Journal of Nonferrous Metals
关键词
氟碳铈矿
浮选
选矿
捕收剂
hydroxy 2 naphthyl hydroxamic acid flotation bastnaesite
