scholarly journals Solvent and Reversed Phase Extraction Chromatographic Separation of Molybdenum and Tungsten with Quaternary Ammonium Salt Reagent, Aliquat 336

1989 ◽  
Vol 62 (10) ◽  
pp. 3278-3282 ◽  
Author(s):  
Nitya Ranjan Das ◽  
Putul Chattopadhyay
Keyword(s):  
Ammonium Salt ◽  
Quaternary Ammonium ◽  
Chromatographic Separation ◽  
Quaternary Ammonium Salt ◽  
Reversed Phase ◽  
Aliquat 336 ◽  
Phase Extraction ◽  
And Tungsten

Separation of Americium (III) from Lanthanides by Quaternary Ammonium Salt Extraction

1965 ◽  
Vol 4 (2) ◽  
Author(s):  
P. Th. Gerontopulos ◽  
L. Rigali ◽  
P. G. Barbano
Keyword(s):  
Rare Earth ◽  
Ammonium Salt ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salt ◽  
Ammonium Thiocyanate ◽  
Aliquat 336 ◽  
Good Separation ◽  
Temperature Changes ◽  
Separation Factors ◽  
High Separation

SummaryThe extraction of americium (III) and the rare earth elements from ammonium thiocyanate solutions into xylene solutions of a quaternary ammonium salt (Aliquat-336) has been investigated. It was found that good separation of americium from rare earths can be achieved by using moderately concentrated ammonium thiocyanate solutions. Extraction coefficients for americium and R. E. were directly proportional to the amine concentration in the solvent. Extraction coefficients were affected by temperature changes, by the presence of various contaminant anions and by the nature of the solvent used, but separation factors between americium and R. E. remained essentially constant. Moderately high separation factors were obtained within the lanthanide group.

The Extraction of Thorium from Nitric Acid Solutions by a Quaternary Ammonium Nitrate (Aliquat-336)

1964 ◽  
Vol 3 (3) ◽  
Author(s):  
P. Gerontopulos ◽  
L. Rigali
Keyword(s):  
Nitric Acid ◽  
Ammonium Nitrate ◽  
Ammonium Salt ◽  
Organic Phase ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salt ◽  
Aliquat 336 ◽  
Acid Solutions ◽  
High Affinity ◽  
Nitric Acid Solutions

SummaryThe extraction of thorium from nitric acid solutions into xylene solutions of a quaternary ammonium salt (Aliquat-336) has been investigated. Aliquat-336 presenta a high affinity for thorium with a maximum of extraction in the range 3-4 M HNOThe species extracted into organic phase appears to be Th(NO

Catalyst- and oxidant-free electrochemical para-selective hydroxylation of N-arylamides in batch and continuous-flow

2020 ◽  
Vol 22 (19) ◽  
pp. 6437-6443
Author(s):  
Cheng-Kou Liu ◽  
Meng-Yi Chen ◽  
Xin-Xin Lin ◽  
Zheng Fang ◽  
Kai Guo
Keyword(s):  
Ammonium Salt ◽  
Quaternary Ammonium ◽  
Continuous Flow ◽  
Quaternary Ammonium Salt ◽  
Selective Hydroxylation

A catalyst-, oxidant-, acidic solvent- and quaternary ammonium salt-free electrochemical para-selective hydroxylation of N-arylamides at rt in batch and continuous-flow was developed.

Synthesis and Performance of Polyoxy-ethylene Ester Quaternary Ammonium Salt

2013 ◽  
Vol 50 (1) ◽  
pp. 9-13 ◽  
Author(s):  
Yong-Qiang Sun ◽  
Wen-Jing Li ◽  
Wan-Xu Wang ◽  
Qiu-Xiao Li ◽  
Wieslaw Hreczuch ◽  
...  
Keyword(s):  
Ammonium Salt ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salt ◽  
And Performance

Instability of Solutions of Quaternary Ammonium Permanganates in Dichloromethane

1997 ◽  
Vol 62 (6) ◽  
pp. 849-854 ◽  
Author(s):  
Vladislav Holba ◽  
Renata Košická
Keyword(s):  
Ammonium Salt ◽  
Rate Constants ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salt ◽  
Activation Parameters ◽  
The Stability

The paper deals with instability of solutions of quaternary ammonium permanganates, QMnO4 (Q = tetraethyl-, tetra-1-propyl-, tetra-1-butyl-, tetra-1-pentyl-, tetra-1-octyl-, and cetyltrimethylammonium), in dichloromethane and presents the rate constants and activation parameters of the reduction of permanganate. Attention was paid to the properties of colloidal Mn(IV) intermediate. The stability of the solutions depends markedly on the quaternary ammonium salt used.

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