Recovery of HCl from Chloride Leach Solution of Spent HDS Catalyst by Solvent Extraction

Abstract In the present work, amine based extractant and its mixture with cationic and solvating extractants were tested for the extraction of HCl from chloride solution containing Al(III). The chloride feed solution resulted from the leaching of spent HDS (hydro-desulfurization) catalysts. For this purpose, amine extractants, such as TOA (trioctyl amine), Alamine 336 (a mixture of tri-octyl/decyl amine), Alamine 308 (tri-isooctyl amine), and TEHA (tri 2-ethylhexyl amine) were used and the extraction and stripping behavior of HCl was compared. The extracted HCl was easily stripped from loaded TEHA phase, when compared with the other tested tertiary amine system. Solvent extraction reaction of HCl by TEHA was determined from the extraction data. Unlike TOA and Alamine 336, adding cationic extractant to TEHA had negligible effect on the extraction and stripping of HCl. In our experimental ranges, no Al was extracted by amines and pure HCl was recovered. MaCabe- Thiele diagrams for the extraction and stripping of HCl by TEHA were constructed.

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Microfluidic solvent extraction of platinum and palladium from a chloride leach solution using Alamine 336

Minerals Engineering ◽

10.1016/j.mineng.2013.01.013 ◽

2013 ◽

Vol 45 ◽

pp. 18-21 ◽

Cited By ~ 17

Author(s):

Chun-Yang Yin ◽

Aleksandar N. Nikoloski ◽

MeiWen Wang

Keyword(s):

Solvent Extraction ◽

Leach Solution ◽

Alamine 336

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Extraction of molybdenum from acidic leach solution of Ni–Mo ore by solvent extraction using tertiary amine N235

Canadian Metallurgical Quarterly ◽

10.1080/00084433.2017.1361197 ◽

2017 ◽

Vol 56 (4) ◽

pp. 426-431 ◽

Cited By ~ 1

Author(s):

Bianfang Chen ◽

Pengfei Xian ◽

Sheng Huang ◽

Biao Liu ◽

Qi Ge ◽

...

Keyword(s):

Solvent Extraction ◽

Tertiary Amine ◽

Leach Solution

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Selective solvent extraction of vanadium over iron from a stone coal/black shale acid leach solution by D2EHPA/TBP

Hydrometallurgy ◽

10.1016/j.hydromet.2010.10.006 ◽

2011 ◽

Vol 105 (3-4) ◽

pp. 359-363 ◽

Cited By ~ 97

Author(s):

Xingbin Li ◽

Chang Wei ◽

Zhigan Deng ◽

Minting Li ◽

Cunxiong Li ◽

...

Keyword(s):

Solvent Extraction ◽

Black Shale ◽

Leach Solution ◽

Selective Solvent ◽

Stone Coal ◽

Acid Leach ◽

Selective Solvent Extraction

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Homogenous recycling of transuranium elements from irradiated fast reactor fuel by the EURO-GANEX solvent extraction process

Radiochimica Acta ◽

10.1515/ract-2018-3089 ◽

2019 ◽

Vol 107 (9-11) ◽

pp. 917-929 ◽

Cited By ~ 14

Author(s):

Rikard Malmbeck ◽

Daniel Magnusson ◽

Stéphane Bourg ◽

Michael Carrott ◽

Andreas Geist ◽

...

Keyword(s):

Solvent Extraction ◽

Fast Reactor ◽

Feed Solution ◽

Extraction Process ◽

Reactor Fuel ◽

Acetohydroxamic Acid ◽

Flow Sheet ◽

Transuranium Elements ◽

Fast Reactor Fuel ◽

Centrifugal Contactor

Abstract The EURO-GANEX process was developed for co-separating transuranium elements from irradiated nuclear fuels. A hot flow-sheet trial was performed in a counter-current centrifugal contactor setup, using a genuine high active feed solution. Irradiated mixed (carbide, nitride) U80Pu20 fast reactor fuel containing 20 % Pu was thermally treated to oxidise it to the oxide form which was then dissolved in HNO3. From this solution uranium was separated to >99.9 % in a primary solvent extraction cycle using 1.0 mol/L DEHiBA (N,N-di(2-ethylhexyl)isobutyramide in TPH (hydrogenated tetrapropene) as the organic phase. The raffinate solution from this process, containing 10 g/L Pu, was further processed in a second cycle of solvent extraction. In this EURO-GANEX flow-sheet, TRU and fission product lanthanides were firstly co-extracted into a solvent composed of 0.2 mol/L TODGA (N,N,N′,N′-tetra-n-octyl diglycolamide) and 0.5 mol/L DMDOHEMA (N,N′-dimethyl-N,N′-dioctyl-2-(2-hexyloxy-ethyl) malonamide) dissolved in Exxsol D80, separating them from most other fission and corrosion products. Subsequently, the TRU were selectively stripped from the collected loaded solvent using a solution containing 0.055 mol/L SO3-Ph-BTP (2,6-bis(5,6-di(3-sulphophenyl)-1,2,4-triazin-3-yl)pyridine tetrasodium salt) and 1 mol/L AHA (acetohydroxamic acid) in 0.5 mol/L HNO3; lanthanides were finally stripped using 0.01 mol/L HNO3. Approximately 99.9 % of the TRU and less than 0.1 % of the lanthanides were found in the product solution, which also contained the major fractions of Zr and Mo.

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Enantioselective Arylation of 3-Carboxamide Oxindoles with Quinone Monoimines and Synthesis of Chiral Spirooxindole-benzofuranones

Synlett ◽

10.1055/s-0037-1611782 ◽

2019 ◽

Vol 30 (09) ◽

pp. 1067-1072

Author(s):

Hui Chen ◽

Hui Liu ◽

Si-Han Zhao ◽

Shao-Bing Cheng ◽

Xiao-Ying Xu ◽

...

Keyword(s):

Structural Analysis ◽

Absolute Configuration ◽

Tertiary Amine ◽

The Other ◽

X Ray ◽

Quaternary Center ◽

Crystal Structural ◽

The Absolute

A highly enantioselective arylation of 3-carboxamide oxoindoles with quinone monoimines is described. Various 3-aryl-3-carboxamide oxindoles with an all-carbon quaternary center were obtained in moderate to good yields (up to 99%) with moderate to good enantioselectivities (up to 98%) in the presence of a bifunctional thiourea-tertiary amine catalyst. The absolute configuration of one product was determined by an X-ray crystal structural analysis and the absolute configurations of the other products can be assigned by analogy. Moreover, several chiral spirooxindole-benzofuranones were synthesized from the 3-aryl-3-carboxamide oxindoles in moderate yields with moderate to good enantioselectivities.

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