饲料级碱式氯化铜性质特征分析研究

Study on characteristic analysis of feed grade basic copper chloride

碱式氯化铜作为饲料添加剂其应用越来越广泛,对其品质的要求也越来越高。采用化学分析、显微镜、X射线衍射(XRD)、差式扫描量热分析(DSC)、热重差热分析(TG),对结晶形态完整的晶胞发育完善的饲料级碱式氯化铜(深圳市深投环保科技有限公司自主研发的产品)的显微形态、纯度、晶体特征和热稳定性等进行了研究,旨在为饲料级碱式氯化铜的鉴别、合成和应用提供理论基础。结果显示:饲料级碱式氯化铜样品的显微镜照片显示为球状多晶聚集体,表面呈现单晶的侧面和棱角等特征,单晶呈直六棱柱状;饲料级碱式氯化铜样品的XRD谱图与卡片85-1713>Botallackite-Cu2(OH)3Cl有较好的匹配;DSC和TG分析结果显示,饲料级碱式氯化铜在氮气环境下从室温升温到600℃的过程中依次发生脱水反应(265~322℃)和脱氯反应(387~472℃),总反应为4Cu2(OH)3Cl→6CuO+2CuCl+Cl2+6H2O,表明饲料级碱式氯化铜晶体热稳定性较好。

The quality requirement for basic copper chloride was higher while used as feed additive widely.The microscopic morphology,purity,crystal characteristics and thermal stability of feed grade basic copper chloride(developed by Shenzhen Shentou Environmental Technology Co.,Ltd.independently) which with complete crystalline morphology and perfect cell de- velopment was studied by chemical analysis,microscopically,XRD,DSC and TG.The theoretical basis on the identifica- tion,synthesis and application of feed grade basic copper chloride could be provided by the research.The results showed that the microscopic morphology photos of basic copper chloride were globular polycrystalline aggregates with sides and corners of microcrystallines which were in the shape of straight hexagonal prisms with bulges on the surface.The XRD spectrum of the sample showed good compatibility with the card 85-1713>Botallackite-Cu2(OH)3Cl.The results of DSC and TG analysis showed good thermal stability of feed grade basic copper chloride crystals while dehydration reaction(265~322 ℃) and dechlorination reaction(387~472 ℃) occurred in the nitrogen environment from room temperature to 600 ℃ and the total re- action was: 4Cu2(OH)3Cl→6CuO+2CuCl+Cl2+6H2O.