A simple method of polyamine purification

1985 ◽  
Vol 38 (4) ◽  
pp. 633 ◽  
Author(s):  
IW Stapleton
Keyword(s):  
Aqueous Solution ◽  
Anion Exchange ◽  
Large Scale ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Simple Procedure ◽  
Crystalline Solid ◽  
Simple Method

A simple procedure for the large-scale purification of commercial polyethyleneamines (H2N[CH2CH2NH]nH where n = 2-5) is described in which the per- tosylate salt separates as a crystalline solid from aqueous solution. The salts require no further purification except for pentaethylenehexamine (n = 5), which requires recrystallization from water. The free bases are regenerated from the tosylate salt by an anion-exchange resin.

scholarly journals Preparation of Anion Exchange Resin Loaded with Ferric Oxide for Arsenic (V) Removal from Aqueous Solution

2017 ◽  
Vol 8 (6) ◽  
pp. 399-403 ◽  
Author(s):  
Sujitra Tandorn ◽  
◽  
Orn-Anong Arqueropanyo ◽  
Wimol Naksata ◽  
Ponlayuth Sooksamiti
Keyword(s):  
Aqueous Solution ◽  
Anion Exchange ◽  
Ferric Oxide ◽  
Exchange Resin ◽  
Anion Exchange Resin

Improved thyroxine radioimmunoassay, for filter paper discs saturated with dried blood.

1976 ◽  
Vol 22 (11) ◽  
pp. 1912-1914 ◽  
Author(s):  
M L Mitchell
Keyword(s):  
Anion Exchange ◽  
Filter Paper ◽  
Large Scale ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Clinical Signs ◽  
Excellent Correlation ◽  
Experimental Conditions ◽  
Large Scale Screening

Abstract I describe an improved procedure for estimating thyroxine in dried blood on 0.32-cm filter paper discs, by radioimmunoassay. A weak anion-exchange resin is used to separate free and antibody-bound radiothyroxine and, by measuring the resin-bound 125I-labeled thyroxine rather than the supernatant radioactivity, a tedious and cumbersome step is eliminated. The unique properties of the resin permit considerable latitude in the experimental conditions, in contrast with charcoal, without compromising sensitivity or precision. There is excellent correlation between thyroxine values obtained from discs and those of the corresponding plasmas. Application of this procedure for large-scale screening of newborns has proved to be highly successful in identifying thyroid insufficiency in several babies before clinical signs were apparent.

Removal of Dichloroethylene in Water Using a Novel TCAS-Loaded Resin

2013 ◽  
Vol 634-638 ◽  
pp. 334-337
Author(s):  
Miao Miao He ◽  
Xiao Jun Hu ◽  
Yong Biao Peng ◽  
Xin He
Keyword(s):  
Aqueous Solution ◽  
Anion Exchange ◽  
Adsorption Mechanism ◽  
Exchange Resin ◽  
Ph Value ◽  
Anion Exchange Resin ◽  
Operating Temperature ◽  
Removal Rate ◽  
Static Tests ◽  
Loaded Resin

Through the method of the static tests, the removal rate of aqueous dichloroethylene onto a new TCAS-loaded resin was researched. This TCAS-loaded resin was made of a novel supramolecular acceptor compound named thiacalix[4]arenetetrasulfonate(TCAS) and anion exchange resin, and the adsorption mechanism was discussed preliminarily. The results of adsorption indicated that the pH value was an important factor for the removal of dichloroethylene and it would be better for the adsorption if the pH value was greater than 6. The operating temperature should be controlled in 5 to 15°C for the adsorption of dichloroethylene onto TCAS-loaded resin while the removal rate decreased with the temperature increasing and the best time for reaction was 40min. The removal rate of dichloroethylene in aqueous solution was better when 25mL aqueous solution of dichloroethylene (1.0mg/L) was adsorbed by 0.5g TCAS-loaded resin. The dichloroethylene can be resolving and TCAS-loaded resin can be reused.

scholarly journals Removal of Chromium(VI) from Aqueous Solution using a Strong base Anion Exchange Resin : Kinetic and Equilibrium Studies

2021 ◽  
Author(s):  
HARISH NAGESH REVANKAR ◽  
PRASANNA S KOUJALAGI ◽  
VIJAYENDRA R GURJAR ◽  
RAVIRAJ M KULKARNI
Keyword(s):  
Aqueous Solution ◽  
Anion Exchange ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Exchange Process ◽  
Maximum Adsorption Capacity ◽  
Experimental Conditions ◽  
Equilibrium Studies ◽  
Strong Base ◽  
Chromium Vi

Abstract The removal of chromium (VI) from aqueous solution using the strong base anion exchange resin Tulsion A-62 (MP) is reported in this study under a variety of experimental conditions, including initial chromium (VI) concentration, contact time, and medium pH. The ion-exchange process for the resin Tulsion A-62 (MP) was relatively simple and after 300 minutes of phase contact, the equilibrium was achieved. The sorption process, which is pH based, extracted the most chromium (VI) when the pH was between 4.0 and 5.0. Both Langmuir and Freundlich adsorption isotherms were used to fit the equilibrium results for Cr(VI) adsorption, however Langmuir isotherm model was found to be more acceptable for the Cr(VI) adsorption and maximum adsorption capacity of Cr(VI) was found to be 201.6 mg/g. Scanning Electron Microscopy with EDX and Fourier transformed infrared spectroscopy were also used to characterize Tulsion A-62 (MP) before and after chromium adsorption. The adsorption mechanism followed reversible first-order kinetics. The findings showed that such anion-exchange resins can be used to effectively extract chromium (VI) ions from water and wastewater.

Nitrate removal from aqueous solution by Arundo donax L. reed based anion exchange resin

2012 ◽  
Vol 203-204 ◽  
pp. 86-92 ◽  
Author(s):  
Xing Xu ◽  
Baoyu Gao ◽  
Yaqing Zhao ◽  
Suhong Chen ◽  
Xin Tan ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Anion Exchange ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Nitrate Removal ◽  
Arundo Donax ◽  
Arundo Donax L
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