从耐热合金固体废物中炼金属的动力学和优化
Imran Ali1, Anastasya Gaydukova2, Tatiana Kon'kova2
1Department of Chemistry, Jamia Millia Islamia (Central University), Jamia Nagar, New Delhi 110025, India.
Molecules (Basel, Switzerland)
|July 29, 2023
概括
回收耐热合金废弃物对于回收贵金属至关重要. 最佳的酸漏条件,特别是使用硫酸,最大限度地从研磨废物中提取.
科学领域:
- 金工程 金工程 金工程
- 材料科学 材料科学 材料科学
- 环境科学 环境科学
背景情况:
- 由于组件成本高,回收耐热合金至关重要.
- 从这些合金中研磨废物带来了重大回收挑战.
研究的目的:
- 调查耐热合金研磨废物的动力学和酸的最佳条件.
- 确定最有效的酸性溶液和参数,以最大限度地回收.
主要方法:
- 研究了使用硫酸 (H2SO4),盐酸 (HCl) 和酸 (HNO3) 的酸化动力学.
- 不同的酸度 (1.53.0mol/L),温度 (煮沸室),废物与溶液的比率,颗粒大小和接触时间.
- 应用了Gray-Weddington,Gistling-Brownstein和Kazeev-Erofeev方程来分析泄漏数据. 在这个过程中,Gistling-Brownstein和Kazeev-Erofeev方程被用于分析泄漏数据.
主要成果:
- 漏速度是通过化学反应和通过反应产品扩散来控制的.
- 最大提取的最佳条件:<0.1毫米颗粒,3.0mol/L H2SO4,100°C,6小时,固体与液体的比率为1:10.
- 确定硫酸是回收最有效的漏剂.
结论:
- 建立了有效的酸溶解和从合金废物中回收的最佳参数.
- 这些发现对于工业金属回收和环境废物处理至关重要.
- 酸是一种可行的方法,可以从耐热合金废弃物中回收有价值的组件.
相关概念视频
01:03Precipitation Gravimetry
6.7K
Precipitation gravimetry is based on converting an analyte into a sparingly soluble precipitate, which is separated by filtration and weighed. An ideal precipitate should be pure, insoluble, of known composition, and easily filtered from the reaction mixture.
In determining nickel by gravimetric analysis, a precipitant of ethanolic dimethylglyoxime is added to a hot nickel salt solution. This is quickly followed by the dropwise addition of dilute ammonia solution until precipitation occurs. A...
In determining nickel by gravimetric analysis, a precipitant of ethanolic dimethylglyoxime is added to a hot nickel salt solution. This is quickly followed by the dropwise addition of dilute ammonia solution until precipitation occurs. A...
6.7K
00:56Extraction: Advanced Methods
487
Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
487
01:08Sample Preparation for Analysis: Advanced Techniques
392
Accurate analysis of complex samples often requires advanced preparation techniques to achieve reliable and reproducible results. Samples containing inorganic or organic materials can be challenging to dissolve or decompose effectively. Standard sample preparation methods include acid digestion, fusion, dry ashing, and wet digestion.
Acid digestion with strong acids is commonly used to dissolve inorganic materials that are insoluble (do not dissolve) in water. This method can be useful for...
Acid digestion with strong acids is commonly used to dissolve inorganic materials that are insoluble (do not dissolve) in water. This method can be useful for...
392
01:08Electrodeposition
671
Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...
Electrodeposition can...
671
00:52Washing, Drying, and Ignition of Precipitates
953
After filtration, the precipitate is washed to remove coprecipitated impurities and any remaining mother liquor. Colloidal precipitates, such as silver chloride, are washed with an electrolyte (such as dilute nitric acid) to prevent the peptization of the precipitate. In the case of slightly soluble precipitates, the wash solution contains a common ion to reduce solubility. Lead sulfate, which is slightly soluble in water, is washed with dilute sulfuric acid. Similarly, wash solutions may be...
953