قائمة الطعام
METHODS FOR THE SEPARATION OF PLATINUM, PALLA-DIUM, RHODIUM, AND IRIDIUM FROM ONE ANOTHERAND FOR THEIR GRAVIMETRIC DETERMINATION. By Raleigh Gilchrist. ABSTRACT. A method is described for the analytical separation of platinum from each orall of the three metals, palladium, …
The effects of knowledge of the solution chemistry of the platinum metals on their separation by solvent extraction and ion-exchange methods are reviewed, for the period 1950–1983. The review concentrates on the chloro-complexes of these metals and indicates those areas which need more investigation or interpretation to provide …
A high-performance liquid chromatography-inductively coupled plasma mass spectrometry (HPLC-ICP-MS) method is presented for analysis of cisplatin, monoaquacisplatin, diaquacisplatin, carboplatin, and oxaliplatin in biological and environmental samples. Chromatographic separation was achieved on pent …
Open Access Article. Selective and Mutual Separation of Palladium (II), Platinum (IV), and Rhodium (III) Using Aliphatic Primary Amines. by. Kazuya Matsumoto. *, Yuto Sezaki., …
The developed technique was applied for the separation of platinum and palladium from refinery wastewater to obtain individual fractions with purity of > 99.9 %. The procedure does not involve the use of toxic, volatile or flammable solvents and can be an environmentally benign alternative to traditionally used approaches. ... The methods …
Solvent extraction (SX) is advantageous over classical precipitation methods because of higher selectivity for the quantitative separation of Pt, Pd and Rh using organic extractants [11], [28].The process has been commercially exploited in various refineries such as Hartley Platinum, Anglo Platinum Rustenburg Base Metals Refinery and …
A combination of such studies should generate more efficient methods for the separation of platinum metals in any combi- nation. In the years since the review by Beamish,200 many investigators have provided new methods for iso- lating and separating the platinum metals. As he predicted, knowledge of the solution chemistry of these …
The separation mechanism and optimized process parameters are summarized. Particularly, the advantages, challenges, and perspective are highlighted in terms of commercial applications. This study aims to present the current research for scholars, and to identify a promising PGMs separation method that is safe and effective.
The solvent extraction and precipitation methods have been used to develop a process to separate platinum and rhodium from a synthetic chloride solutions containing other associated metals such as (mg/L): Pt-364, Rh-62, Al-13880, Mg-6980, Fe-1308 at <1M HCl acidity. At pH 3.4, the quantitative pr …
Gas phase separation is an effective method for the recovery of Ru from catalysts, lead button and from other platinum group metals. Separation and pre-concentration of noble metals can be ...
Some of the common methods of separating substances or mixtures are: Handpicking. Threshing. Winnowing. Sieving. Evaporation. Distillation. Filtration or Sedimentation. Separating Funnel.
ABSTRACT In this work platinum (IV) was extracted by 0.3 M CYANEX 923 in kerosene under optimum conditions of shaking time 10 min, 0.5 M HNO3, O:A = 1:1, and at 25°C. The slope analysis method … Expand
At present the final refining stage that produces the individual platinum group metals is carried out by selective precipitation from a solution of mixed platinum group metals, but this is inefficient as far as the degree of separation is concerned. An improved process which makes use of liquid–liquid extraction has been developed to a pilot ...
Abstract A novel ionic liquid (IL) functionalized with thiodiglycol amic acid containing a soft S donor was synthesized for the effective and efficient extraction of platinum group metals (Ru, Rh, and Pd) from aqueous nitric acid solutions, such as high-level radioactive liquid waste (HLLW). The IL enabled rapid extraction of Pd(II) with an …
In this study, palladium (II), platinum (IV), rhodium (III) and iridium (IV) were sequentially separated with 1-hexyl-3-methylimidazole-2-thione (HMImT) from aqueous hydrochloric acid media by adjustment of hydrochloric acid concentration or in the presence of tin (II) chloride using environmental-friendly microextraction method. It is the first time …
The platinum-group metals (PGM) are technologically important metals which are becoming increasingly relevant in reducing harm to the environment. The separation and purification of the PGM is ...
A review of methods of separation of the platinum-group metals through their chloro-complexes. F. Bernardis, R. A. Grant, D. Sherrington. Published 1 …
A new method for determination of the platinum group elements (PGE's: Ru; Rh; Pd; Ir; Pt) in geological samples, using microwave-assisted acid digestion and alkali fusion, separation of the PGE's ...
An ion-exchange method for selective separation of palladium, platinum and rhodium from solutions obtained by leaching automotive catalytic converters. Talanta 42, 249–255 (1995).
Extraction and separation of platinum group metals (PGMs) from secondary raw materials are usually carried out via hydrometallurgical …
Abstract. No definite date can be ascribed to the discovery of platinum; rather it became gradually known to the Western World as a distinct metal of unique properties over a period of two centuries, between 1500 and 1700. The first source to be exploited was the placer deposits in New Granada (now Colombia) where it was initially regarded as a ...
Methods for the separation of platinum, palladium, rhodium, and iridium from one another and for their gravimetric determination @article{Gilchrist1934MethodsFT, title={Methods for the separation of platinum, palladium, rhodium, and iridium from one another and for their gravimetric determination}, author={Raleigh Gilchrist}, …
Demand for platinum (Pt), palladium (Pd) and rhodium (Rh) as parts of platinum group metals (PGMs) has continued to increase as a consequence of increase in their applications. Various extraction methods have been developed to produce the metals including leaching-based process using halides, sulfate–chloride and cyanide, which …
Recovery of PGMs (especially rhodium, platinum, and palladium) from different spent manufactured products (like catalytic converters) is considered as an important task as they are rarely found in nature, and they possess high economic value. In this work, the honeycomb of a car catalytic converter was primarily processed by …
Separation. Solvent extraction. Solid-phase extraction. Chromatography. 1. Introduction. 1.1. The importance of the PGM. The platinum-group metals (PGM) are …
Solvent extraction (SX) is advantageous over classical precipitation methods because of higher selectivity for the quantitative separation of Pt, Pd and Rh using organic extractants [11], [28].The process has been commercially exploited in various refineries such as Hartley Platinum, Anglo Platinum Rustenburg Base Metals Refinery and …
The general methods of extracting and separating platinum from spent catalysts include pyrometallurgy and hydrometallurgy. Choosing and optimizing the …
The effects of knowledge of the solution chemistry of the platinum metals on their separation by solvent extraction and ion-exchange methods are reviewed, for the period 1950-1983. The review concentrates on the chloro-complexes of these metals and indicates those areas which need more investigation …
DOI: 10.1016/B978-0-08-096809-4.10036-X Corpus ID: 91875973; Separation of the Platinum-Group Metals from Base Metal Sulfides, and the Refining of Nickel, Copper and Cobalt @inproceedings{Crundwell2011SeparationOT, title={Separation of the Platinum-Group Metals from Base Metal Sulfides, and the Refining of Nickel, Copper and Cobalt}, …
choose an effective, selective method for the recovery and separation of the platinum group metals. This review focuses on the most important aspects of the characteristics of the PGMs, including their properties and occurrence, the processing of natural and secondary raw materials and the role of
حقوق النشر ©2000- 2024 شركة شنغهاي زينيث
