羟肟酸酰氯法工艺探索及其对氧化铅矿捕收性能  

Study on synthesis process of benzohydroxamic acid chloride and its application in rare earth flotation

作　　者：刘崇峻 吴桂叶 马艳红 卢通 刘慧南 朱阳戈 LIU Chongjun;WU Guiye;MA Yanhong;LU Tong;LIU Huinan;ZHU Yangge(BGRIMM Technology Group,Beijing 102628,China;State Key Laboratory of Mineral Processing Science and Technology,Beijing 102628,China)

机构地区：[1]矿冶科技集团有限公司,北京102628 [2]矿物加工科学与技术国家重点实验室,北京102628

出　　处：《中国矿业》2022年第S01期439-443,共5页China Mining Magazine

摘　　要：羟肟酸由于其具有用量少、选择性强、捕收力强、浮选速度快等特点被广泛应用于氧化矿浮选过程中,是一种重要的浮选捕收剂。针对传统酯-羟胺法生产羟肟酸过程中存在“三废”高,产品纯度低的问题,对羟肟酸的酰氯-羟胺生产工艺进行了探索。试验结果表明,在反应温度15℃,盐酸羟胺、氢氧化钠与苯甲酰氯的摩尔比为1.2∶2.6∶1.0,苯甲羟肟酸浓度为20%,反应时间为6 h的条件下,产品纯度可达93.58%。该合成方法明显改善了产品质量,减少了“三废”的排放。通过氧化铅矿浮选试验对产品性能进行了考察,浮选试验表明,在苯甲羟肟酸用量相同的条件下,酰氯-羟胺法生产的苯甲羟肟酸与市售苯甲羟肟酸产品浮选效果相似。Hydroxamic acid is widely used in the flotation process of oxidized ore because of its characteristics of low dosage,strong selectivity,strong collection power and fast flotation speed.It is an important flotation collector.Aiming at the problems of high waste and low purity in the traditional esterol-hydroxylamine production process,the production technology of acyl chloro-hydroxylamine hydroxamic acid is explored.The results show that the product purity reached 93.58%under the conditions of reaction temperature 15℃,molar ratio of hydroxylamine hydrochloride,sodium hydroxide and benzoyl chloride is 1.2∶2.6∶1.0,concentration of benzohydroxamic acid is 20%and reaction time is 6 h.The synthetic method improved the product quality obviously and reduced the discharge of three wastes.The performance of the product is investigated by the flotation test of cerussite.The flotation test show that under the condition of the same dosage of benzohydroxamic acid,the flotation effect of benzohydroxamic acid produced by acyl chloro-hydroxylamine method is similar to that of the commercially sold benzohydroxamic acid product.

关 键 词：羟肟酸 合成方法 浮选 苯甲酰氯 氧化铅锌浮选 

分 类 号：TD952[矿业工程—选矿]