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Methylene rhodanine reagent and application thereof in solid phase extraction of platinum

A solid-phase extraction column and methylene technology are applied to the methylene rhodamine reagent and its application field in platinum solid-phase extraction, which can solve the problem of acid and alkali resistance, inability to be reused many times, and practical application. Restrictions and other issues, to achieve the effect of low cost, easy automation of operation, and easy emulsification

Inactive Publication Date: 2012-09-12
YUNNAN MINZU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition to being used for sample pretreatment, solid-phase extraction technology has also been gradually applied to the separation and enrichment of precious metal elements, but most of the solid-phase extraction materials have disadvantages such as not being resistant to acid and alkali, and cannot be reused many times; restricted
Researchers have been working hard to develop different extraction materials to solve the shortcomings of existing solid-phase extraction materials such as not being resistant to acid and alkali and not being able to be reused many times, so as to realize the practical application of the technology of separating and enriching precious metal elements by solid-phase extraction

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1:The used solid-phase extraction small column is 10 mm * 10 mm, packing (attached the MCI-GEL reverse phase microporous resin of DMBR reagent described in the present invention) 1.2 g; The liquid to be extracted is hydrochloric acid, sodium chlorate of waste circuit board The concentration of platinum in the leaching solution is 5.21 mg / L, the pH of the solution is adjusted to 2.0, and the column is passed through the column at a flow rate of 20 mL / min with a column volume of 1.2 L. After enrichment, wash with 5.0 mL of 1% thiourea in the reverse direction Platinum enriched on the column. Under this condition, the enrichment factor can reach 240 times, and the recovery rate of platinum can reach 95.2%. The platinum in the eluent is smelted and recovered by conventional methods.

Embodiment 2

[0031] Example 2: The solid-phase extraction column used is: 10 mm × 10 mm, packed with 1.2 g of filler (MCI-GEL reversed-phase microporous resin loaded with DMBR reagent of the present invention); The concentration was 1.2 mg / L, the pH was adjusted to 1.5, and the column volume was 4.0 L. After enrichment, 5 mL of 1.5% thiourea was used to elute the enriched platinum on the small column in the reverse direction. Under this condition, the enrichment factor can reach 800 times, and the recovery rate of platinum can reach 93.2%. The platinum in the eluent is smelted and recovered by conventional methods.

Embodiment 3

[0032] Example 3: The solid-phase extraction column used is: 10 mm × 10 mm, filled with filler (1.2 g of MCI-GEL reversed-phase microporous resin loaded with DMBR reagent of the present invention; the liquid to be extracted is platinum ore leaching liquid, containing platinum 15.4 mg / L, the pH was adjusted to 2.2; the solution was passed through the column at a flow rate of 15 mL / min, and the column volume was 1.5 L. After enrichment, 5 mL of 0.8% thiourea was used to elute the enriched platinum on the small column in the reverse direction. Under the conditions, the enrichment factor can reach 300 times, and the recovery rate of platinum can reach 94.4%. The platinum in the eluent can be smelted and recovered by conventional methods.

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Abstract

The invention discloses a methylene rhodanine reagent and application thereof in solid phase extraction of platinum, belongs to the field of hydrometallurgy, and in particular relates to a new methylene rhodanine reagent and application thereof in solid phase extraction of platinum. The extracting reagent has a structural formula shown as the specifications, and is named 2,4-dimethyl benzol-methylene rhodanine. The reagent is prepared by condensing 2,4-dimethylbenzylidene and rhodanine in a glacial acetic acid medium. A solid phase extraction column prepared from the reagent can be used for the solid phase extraction of platinum, has high selectivity and high enrichment factor, and has high extraction capacity for the platinum, and the material can be repeatedly used. The primary extraction rate for the platinum is over 95.3 percent, and the enrichment factor is more than 500; and the material has the extraction capacity of 28.5mg / g for the platinum.

Description

Technical field [0001] The present invention is a wet metallurgical field, which involves a new Asian -based tannin reagent and its application in platinum solid -phase extraction. technical background [0002] Ruo Tannin reagent is an important type of organic analysis reagent. Former Soviet scholars synthesized the tannin nitrogen reagent and Asian armor tannin reagent, and synthesized the extremely derivatives of the derivative of tannin through sulfur generation.Until now, the Tannan and Sulfuka Tan Ning reagents have developed into an important type of optical analysis reagent. The reported reagent structure has reached more than 200 types, and the optical method of various precious metal elements is widely used.Because this type of reagent has a good complexity and selectivity for precious metal elements, it is also widely used as extraction reagents for precious metals. [0003] Solid phase extraction is a sample pre -processing technology in recent years. It is developed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D277/36C22B3/34C22B11/00
CPCY02P10/20
Inventor 胡秋芬李银科羊波杨新周其他发明人请求不公开姓名
Owner YUNNAN MINZU UNIV
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