5-羟基辛烷-4-酮肟对孔雀石的浮选性能及吸附机理  

Flotation performance and adsorption mechanism of 5-hydroxyoctan-4-one oxime to malachite

作　　者：李方旭 林日孝 赵刚[4] Fang-xu LI;Ri-xiao LIN;Gang ZHAO(Institute of Resources Utilization and Rare Earth Development,Guangdong Academy of Sciences,Guangzhou 510650,China;State Key Laboratory of Rare Metals Separation and Comprehensive Utilization,Guangzhou 510650,China;Guangdong Provincial Key Laboratory of Development and Comprehensive Utilization of Mineral Resources,Guangzhou 510650,China;School of Chemistry and Chemical Engineering,Central South University,Changsha 410083,China)

机构地区：[1]广东省科学院资源利用与稀土开发研究所,广州510650 [2]稀有金属分离与综合利用国家重点实验室,广州510650 [3]广东省矿产资源开发与综合利用重点实验室,广州510650 [4]中南大学化学化工学院,长沙410083

出　　处：《Transactions of Nonferrous Metals Society of China》2023年第12期3825-3834,共10页中国有色金属学报（英文版）

基　　金：financially supported by the GDAS’Project of Science and Technology Development,China(No.2022GDASZH2022010104);the supports from the High Performance Computing Center of Central South University,China。

摘　　要：为提高氧化铜资源的利用效率,以丁醛和盐酸羟胺为原料合成新型捕收剂5-羟基辛烷-4-酮肟(HOO)。通过浮选试验、傅里叶红外光谱(FTIR)、X射线光电子能谱(XPS)分析和密度泛函理论(DFT)计算研究其浮选性能和吸附机理。浮选结果表明,与苯羟肟酸(BHA)相比,HOO具有捕收能力强和用量低的优点。FTIR和XPS的结果清楚地证明了HOO通过C—OH和C=NOH官能团与Cu原子之间键合形成铜-肟配比合物(五元环和六元环螯合物)并吸附在孔雀石表面。此外,DFT结果表明,HOO能通过肟和羟基与铜原子配合形成双齿螯合物。In order to improve the utilization efficiency of copper oxide mineral resources,a novel collector,5-hydroxyoctan-4-one oxime(HOO),was synthesized from a commodity chemical butyraldehyde and hydroxylamine hydrochloride.Its flotation performance and adsorption mechanism to malachite were investigated by flotation tests,Fourier transform infrared spectrum(FTIR),X-ray photoelectron spectroscopy(XPS)analysis and density functional theory(DFT)calculation.Flotation results of malachite showed that HOO exhibited better collecting ability and less dosage compared to benzohydroxamic acid(BHA).FTIR and XPS data gave clear evidence for the formation of Cu-oxime complex(five-membered and six-membered ring chelates)on malachite surfaces after HOO adsorption through the linkage among C—OH,C=NOH and Cu species.Moreover,DFT results showed that HOO coordinated with Cu atoms preferably through the oxime and hydroxyl groups to form bidentate chelates.

关 键 词：浮选 吸附 酮肟捕收剂 氧化铜矿 孔雀石 

分 类 号：TD952[矿业工程—选矿] TD923