(1.北京科技大学614信箱，北京100083；
2.清华大学)
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(Ⅱ)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T= 6.76×10-2·C1/1.02，吸附速率常数K = 2.64 × 105m2·mol-1·min-1。
关键字: 1-羟基-2-萘羟肟酸 氟碳铈矿 浮选 电负性 螯合特性
1-HYDROXY-2-NAPHTHYL HYDROXAMIC ACID
（1.P. O. Box614, University of Science and Technology Beijing, Beijing100083
2.Tsinghua University, Beijing100084）
Abstract:The collecting behaviour of bastnaesite with 1-hydroxy-2-naphthyl hydroxamic acid was investigated and its mechanism was discussed byξ-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 isГ=6.76×10-2·C1/1.02. The constant of adsorption velocity isK=2.64×105m2·mol-1·min-1.
Key words: 1-hydroxy-2-naphthyl hydroxamic acid flotation bastnaesite
