1-羟基-2-萘羟肟酸浮选氟碳铈矿作用机理^①

来源期刊：中国有色金属学报1996年第4期

论文作者：任俊 卢寿慈 池汝安

文章页码：27 - 31

关键词：1-羟基-2-萘羟肟酸； 氟碳铈矿； 浮选； 电负性； 螯合特性

Key words：1-hydroxy-2-naphthyl hydroxamic acid;　　flotation;　bastnaesite

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，吸附方程Γ= 6.76×10^-2·C^1/1.02，吸附速率常数K = 2.64 × 10⁵m²·mol^-1·min^-1。

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 is Г=6.76×10^-2·C^1/1.02. The constant of adsorption velocity is K=2.64×10⁵m²·mol^-1·min^-1.