scholarly journals Preparation and characterization of (St-DVB-MAA) ion exchange resins

2017 ◽  
Author(s):  
Shanquan Jiang ◽  
Xiangwei Sun ◽  
Lixing Ling ◽  
Shumin Wang ◽  
Wufeng Wu ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Ion Exchange Resins ◽  
Exchange Resins

Solventless synthesis of solketal with commercially available sulfonic acid based ion exchange resins and their catalytic performance

2017 ◽  
Vol 6 (1) ◽  
Author(s):  
Jesús Esteban ◽  
Félix García-Ochoa ◽  
Miguel Ladero
Keyword(s):  
Ion Exchange ◽  
Sulfonic Acid ◽  
Catalytic Performance ◽  
Maximum Activity ◽  
Ion Exchange Resins ◽  
Active Centers ◽  
Ease Of Access ◽  
Exchange Resins ◽  
Solventless Synthesis

AbstractAs a means to valorize glycerol, the synthesis of solketal through a ketalization reaction with acetone was performed. Mild solventless conditions were applied to test the activity of different commercially available sulfonic ion exchange resins that had already been used for other applications, namely: Amberlyst 35dry, Amberlyst 36dry, Purolite CT275DR, Purolite CT276 and Lewatit GF101. Thorough characterization of the resins is herein provided and discussed, including acidity, elemental analysis, thermogravimetric, 13C-NMR, surface area and pore size distribution measurements. Lewatit GF101 showed the best performance reaching a yield to solketal of 47% after 6 h of operation at 313 K using a molar excess of acetone to glycerol of 4.5 to 1, owing to a greater availability of active centers as well as the ease of access to them than in the rest of the resins. Additionally, reutilization with and without regeneration was performed in up to five cycles, showing that Purolite CT276 had the lowest relative drop of its maximum activity, despite being the least active in each of the cycles.

scholarly journals One-Step Steam Pyrolysis Preparation and Characterization of Spherical Carbon Adsorbents Obtained from Ion-Exchange Resins

2008 ◽  
Vol 26 (6) ◽  
pp. 407-413 ◽  
Author(s):  
Marek Wiśniewski ◽  
Agnieszka Pacholczyk ◽  
Gerhard Rychlicki ◽  
Artur P. Terzyk ◽  
Piotr A. Gauden
Keyword(s):  
Ion Exchange ◽  
Carbon Adsorbents ◽  
Ion Exchange Resins ◽  
Spherical Carbon ◽  
One Step ◽  
Exchange Resins

scholarly journals Characterization of Macroreticular Ion-exchange Resins

1968 ◽  
Vol 89 (2) ◽  
pp. 151-155
Author(s):  
Takeo YAMABE ◽  
Kazuko YAMAGATA ◽  
Manabu SENO
Keyword(s):  
Ion Exchange ◽  
Ion Exchange Resins ◽  
Exchange Resins

scholarly journals Radioisotopic Tracer Technique for Characterization of Nuclear and Non-Nuclear Grade Ion Exchange Resins Tulsion A-23 and Indion-810

2013 ◽  
Vol 11 ◽  
pp. 1-5
Author(s):  
Pravin U. Singare
Keyword(s):  
Ion Exchange ◽  
Reaction Rate ◽  
Nuclear Grade ◽  
Ion Exchange Resins ◽  
Specific Reaction Rate ◽  
Experimental Conditions ◽  
Specific Reaction ◽  
Bromide Ion ◽  
Exchange Resins

In the present paper 82Br radioactive tracer isotopes was used for characterization of nuclear and non-nuclear grade ion exchange resins Tulsion A-23 and Indion-810 respectively. The bromide ion-isotopic exchange reactions were performed by equilibrating 1.000 g of conditioned resins in bromide form with labeled bromide ion solution of different concentrations ranging from 0.001 M to 0.004 M, in the temperature range of 30.0 °C to 45.0 °C. The resins were characterized by comparing the values of specific reaction rate (min-1), amount of bromide ion exchanged (mmol) and percentage of bromide ions exchanged under identical experimental conditions. It was observed that the above values decrease with rise in temperature and increases with increase in concentration of labeled bromide ion solution. From the experimental values of specific reaction rate, amount and percentage of bromide ions exchanged, it was observed that Tulsion A-23 resins are superior to Indion-810 resins under identical experimental conditions.

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