用氨配合法从含锌废催化剂中回收锌

发布时间：2017-12-28 09:23

本文关键词：用氨配合法从含锌废催化剂中回收锌　出处：《无机盐工业》2016年02期 　论文类型：期刊论文

【摘要】：针对氧化锌易溶于氨-碳酸氢铵混合溶液中生成锌氨配合物这一特点,采用含锌废催化剂为原料,经化浆、高剪切分散后加入氨-碳酸氢铵溶液浸取,通过沉淀除杂、锌粉置换和热解蒸氨得到碱式碳酸锌。考察了高剪切分散机剪切速率、反应温度、浸取剂p H和浸取时间对锌浸出率的影响。结果表明,在剪切速率为25 000 r/min、反应温度为328 K、浸取剂p H=7.5、浸取时间为2 h的条件下,锌浸出率可达90%以上,制备的碱式碳酸锌优于HG/T2523—2007《工业碱式碳酸锌》标准要求。该研究综合利用了含锌废催化剂,无二次污染产生,符合清洁生产和资源合理利用的要求。
[Abstract]:According to Zinc Oxide soluble in ammonia ammonium bicarbonate in the mixed solution of zinc ammonia complex formation of this characteristic, the zinc containing waste catalyst as raw materials by chemical pulp, high shear dispersion after adding ammonia - ammonium bicarbonate solution leaching by precipitation, impurity removal, zinc dust replacement and ammonia by pyrolysis of basic zinc carbonate. The effects of shear rate, reaction temperature, P H and leaching time on the zinc leaching rate of high shear dispersing machine were investigated. The results show that the shear rate is 25000 r/min, the reaction temperature is 328 K, leaching agent P H=7.5, extraction time was 2 h, the leaching rate of zinc is more than 90%, basic zinc carbonate is better than that of HG/T2523 - 2007 "industry standard" of basic zinc carbonate prepared. The waste catalyst containing zinc is used in this study, which is produced without two times of pollution, which is in line with the requirements of clean production and rational utilization of resources.
【作者单位】：湖南化工职业技术学院教务处;
【基金】：2014年度湖南省高等学校科学研究项目:从含锌废催化剂制备纳米级氧化锌的工艺研究(14C0383)
【分类号】：X705;TQ132.41
【正文快照】： 催化剂是现代化学研究的热点问题之一,在石油化工、医药等工业生产过程中应用广泛[1]。近年来,随着科学技术的进步和生产规模的扩大,化工催化剂的消耗量迅速增加[2-3]。锌系催化剂主要用于低压法合成甲醇、合成氨工业低温变换工艺以及基本有机合成工业等领域,其消耗数量大、使

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