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Ionic liquid solvents of perhalide type for metals and metal compounds

A technology of ionic liquids and metals, applied in the production of mercury halides, organic chemistry, bulk chemicals, etc., can solve difficult and dangerous problems

Active Publication Date: 2012-07-18
REPSOL SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] When working with bromine or chlorine at or near ambient temperature and pressure, there are significant difficulties and dangers, related to the corrosivity and toxicity of both bromine and chlorine vapors, and also to the incompatibility of halogens with many metals

Method used

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  • Ionic liquid solvents of perhalide type for metals and metal compounds
  • Ionic liquid solvents of perhalide type for metals and metal compounds
  • Ionic liquid solvents of perhalide type for metals and metal compounds

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0113] Embodiment 1: the synthesis of perhalide ionic liquid

[0114] Ionic liquids with mixed perhalogen anions ([XY 2 ] - , wherein X=Cl or Br, and Y=Br or I) according to literature method with dialkylimidazolium (dialkylimidazolium), tetraalkylammonium (tetraalkylammonium), tetraalkylphosphonium (tetraalkylphosphonium) and alkylpicoline Onium (alkylmethylpyridinium) cation (see Table 1) preparation. Briefly, liquid bromine or solid iodine is added to an appropriate amount of an organic halide salt to achieve the desired 1:1 molar stoichiometry, yielding a perhalide anion. The mixture was mixed overnight at room temperature to yield the respective perhalide ionic liquids, which were characterized by mass spectrometry and thermogravimetric analysis (TGA).

[0115] Mass spectrometric identification of cations in each case ([Q] + ) and perhalogen anions ([XY 2 ] - ) in the presence of ionic masses. TGA showed that the volatilization of halogens was significantly reduced...

Embodiment 3

[0121] Example 3: Dissolution of metals

[0122]A series of powdered elemental metal samples (about 0.1 g each, accurately measured) were mixed with 1-butyl-3-methylimidazolium tribromide (1.0 mL) to produce A mixture of approximately 5 wt% metal in the ionic liquid. The mixture was stirred and heated to 60 °C for 72 h, then cooled to room temperature and filtered through a 2 micron nylon filter. For each sample, approximately 0.1 g of filtrate was accurately weighed and digested in 50 ml of 5% w / w nitric acid, and the metal content was determined by inductively coupled plasma (ICP) analysis. The percentage of metal samples dissolved in ionic liquids in each test is shown in Table 2.

[0123] Table 2. Metal Dissolution Test Results

[0124]

Embodiment 4

[0125] Example 4: Qualitative Screening for Mercury Solubilization

[0126] Qualitative screening of the solubility of elemental mercury in ionic liquid systems has been performed by visually observing the state of individual mercury droplets (approximately 0.05 g) stirred in approximately 1-2 mL of ionic liquid at room temperature and 60°C. Complete dissolution under these conditions would result in a mercury loading of about 25-50,000 ppm (about 5 mol%).

[0127] Table 3. Screened perhalide ionic liquids and observations on mercury solubility

[0128]

[0129]

[0130] a [C 4 mim] + =1-butyl-3-methylimidazolium; [P 6，6，6，14 ] + = Trihexyltetradecylphosphonium; [C 2 C 2 mim] + =1,3-diethylimidazolium; [N 4，4，4，1 ] + = Tributylmethylammonium; [C 4 4 pic] + = 1-butyl-4-methylpyridinium (4-picolinium) (4-picolinium).

[0131] b About 0.05g of mercury is in contact with 1-2mL of ionic liquid, and the mercury solubility is at least 25,000ppm.

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Abstract

The present invention relates to a process for dissolving metals in perhalide containing ionic liquids, and to the extraction of metals from mineral ores; the remediation of materials contaminated with heavy, toxic or radioactive metals; and to the removal of heavy and toxic metals from hydrocarbon streams.

Description

technical field [0001] The present invention relates to a method for dissolving metals in ionic liquids. More specifically, the present invention relates to a method for dissolving metals in ionic liquids comprising perhalogen anions. The method of the invention can be applied to the extraction of metals from ores; the remediation of materials contaminated with heavy, toxic or radioactive metals; and the removal of heavy and toxic metals from hydrocarbon streams. The invention further relates to novel compositions comprising metals dissolved in ionic liquids. Background technique [0002] The term "ionic liquid" as used herein refers to a liquid that can be produced by melting a salt, and when so produced consists only of ions. An ionic liquid can be formed from a homogeneous species comprising one cation and one anion, or it can consist of more than one cationic species and / or more than one anionic species. Thus, an ionic liquid may consist of more than one cationic spec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/04C22B3/10C22B11/06C07C211/00C07D213/16C07D213/61C22B11/00C22B43/00C01G13/04
CPCC22B11/04C22B3/10C22B11/06C07C211/63C22B43/00C07D233/58C22B3/04C01G13/04C07C211/00C07D213/16C07D213/61C22B11/00Y02P10/20Y02P20/54
Inventor 罗宾·顿·罗杰斯约翰·霍尔比耶
Owner REPSOL SA
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