Glucose dehydration to 5-hydroxymethylfurfural in ionic liquid over Cr3+-modified ion exchange resin

RSC Advances ◽  
2015 ◽  
Vol 5 (12) ◽  
pp. 9290-9297 ◽  
Author(s):  
Hui Liu ◽  
Hongwei Wang ◽  
Yuan Li ◽  
Wei Yang ◽  
Changhua Song ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ion Exchange ◽  
Exchange Resin ◽  
Ion Exchange Resin ◽  
Catalytic Performance ◽  
Exchange Method ◽  
Ion Exchange Method ◽  
Excellent Catalytic Performance

Cr3+-D001-cc resin shows excellent catalytic performance for the dehydration of glucose to 5-hydromethylfurfural, which is prepared by a simple ion-exchange method.

scholarly journals Preparation of mesoporous ZnAl2O4 nanoflakes by ion exchange from a Na-dawsonite parent material in the presence of an ionic liquid

RSC Advances ◽  
2019 ◽  
Vol 9 (21) ◽  
pp. 11894-11900 ◽  
Author(s):  
TongIl Kim ◽  
HakSung Yun ◽  
GwangBok Han ◽  
Jiabiao Lian ◽  
Jianmin Ma ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ion Exchange ◽  
Parent Material ◽  
Exchange Method ◽  
Ion Exchange Method

Herein, mesoporous ZnAl2O4 spinel nanoflakes were prepared by an ion-exchange method from a Na-dawsonite parent material in the presence of an ionic liquid, 1-butyl-2,3-dimethylimidazolium chloride ([bdmim][Cl]), followed by calcination at 700 °C for 2 h.

Ion Exchange Method for Rapid Determination of Alkalinity of Water-Soluble Tea Ash Containing High Levels of Manganese

1980 ◽  
Vol 63 (3) ◽  
pp. 460-461
Author(s):  
Saidul Z Qureshi ◽  
Fadhil M Najib ◽  
Fahmi A Mohammed
Keyword(s):  
Ion Exchange ◽  
Cation Exchange ◽  
Exchange Resin ◽  
Rapid Determination ◽  
Cation Exchange Resin ◽  
Water Soluble ◽  
Exchange Method ◽  
Strong Cation Exchange ◽  
Ion Exchange Method

Abstract An ion exchange method to determine the alkalinity of water-soluble tea ash containing high levels of manganese is described. A chromatographic column containing a strong cation exchange resin (20–50 mesh) in Na+ form, with a bed volume of 5 mL is used. The present ion exchange method is compared to pH titrations and also to the official AOAC methods (31.012, 31.015, 31.016). Results with the new method are accurate and precise.

Collaborative Study of an Ion Exchange Method for Ephedrine in Ephedrine Sulfate Sirup NF

1969 ◽  
Vol 52 (4) ◽  
pp. 854-857
Author(s):  
Donald J Smith
Keyword(s):  
Hydrochloric Acid ◽  
Ion Exchange ◽  
Positive Charge ◽  
Exchange Resin ◽  
Collaborative Study ◽  
Cation Exchange Resin ◽  
Polystyrene Sulfonate ◽  
Resin Column ◽  
Exchange Method ◽  
Ion Exchange Method

Abstract An ion exchange procedure for Ephedrine Sulfate Sirup NF, based on the ability of ephedrine to be retained on a polystyrene sulfonate cation exchange resin column, was studied collaboratively by eight laboratories. The compound is held on the column by a positive charge located in the cationic center of the molecule, it is then eluted with hydrochloric acid, and its ultraviolet absorption is measured. The addition of 57.88 mg ephedrine sulfate to Ephedrine Sulfate Sirup NF resulted in recoveries of 58.39 and 57.72 mg, or 101 and 100%, respectively. Recoveries for collaborative samples, each containing 19.22 and 19.33 mg/5 ml, were 99.8 ± 1.83 and 101 ± 4.09%, respectively.

The dehydration of fructose to 5-hydroxymethylfurfural efficiently catalyzed by acidic ion-exchange resin in ionic liquid

2013 ◽  
Vol 133 ◽  
pp. 347-353 ◽  
Author(s):  
Yuan Li ◽  
Hui Liu ◽  
Changhua Song ◽  
Xiaomin Gu ◽  
Huaming Li ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ion Exchange ◽  
Exchange Resin ◽  
Ion Exchange Resin

BMIm HCO3: an ionic liquid with carboxylating properties. Synthesis of carbamate esters from amines

2016 ◽  
Vol 40 (12) ◽  
pp. 9895-9898 ◽  
Author(s):  
A. Di Nicola ◽  
A. Arcadi ◽  
L. Rossi
Keyword(s):  
Ionic Liquid ◽  
Ion Exchange ◽  
Exchange Method ◽  
Ion Exchange Method

BMIm HCO3 is an ionic liquid obtained by the ion-exchange method showing interesting carboxylating properties.

Baeyer-Villiger Reaction of Adamantanone over Sn-Containing Hydrotalcite-Like Catalysts

2007 ◽  
Vol 119 ◽  
pp. 163-166 ◽  
Author(s):  
Zhi Qiang Yang ◽  
Sang Eon Park
Keyword(s):  
Hydrogen Peroxide ◽  
Ion Exchange ◽  
Direct Synthesis ◽  
Xrd Analysis ◽  
Catalytic Performance ◽  
X Ray Diffraction ◽  
Exchange Method ◽  
X Ray ◽  
Vis Spectroscopy ◽  
Ion Exchange Method

Sn-containing hydrotalcite-like compounds were prepared by three different methods such as (i) direct synthesis, (ii) ion-exchange and (iii) grafting. These catalysts were proved to have framework Sn species by powder X-ray diffraction (XRD) analysis and UV-vis spectroscopy. The catalysts prepared by three methods were found to be active and selective for the liquid phase Baeyer–Villiger (BV) oxidation of admantonone using hydrogen peroxide (H2O2) as an oxidant and acetonitrile as a solvent. The Sn-hydrotalcite-like catalysts prepared by ion-exchange method exhibited better catalytic performance than the catalysts prepared by other two methods. Among the ion-exchanged hydrotalacite-like catalysts, 3% Sn ion-exchanged hydrotalcite exhibited superior activity at 30% conversion and 100% selectivity.

Effect of Cycles and Ion-Exchange on the Purification of Lithium Carbonate

2012 ◽  
Vol 443-444 ◽  
pp. 594-600
Author(s):  
Jian Wu ◽  
Yao Chun Yao ◽  
Yong Nian Dai ◽  
Bin Yang
Keyword(s):  
Ion Exchange ◽  
High Purity ◽  
Mother Liquor ◽  
Exchange Resin ◽  
Exchange Process ◽  
Lithium Carbonate ◽  
Ion Exchange Resin ◽  
Exchange Method ◽  
Ion Exchange Process ◽  
Industrial Grade

In this study, high-purity Li2CO3 was prepared by carbonation-decomposition and ion-exchange methods using the industrial-grade lithium carbonate, and the effect of cycles and ion-exchange of the mother liquor on purification was investigated. Results showed that the process of cycles can improve the purity and productivity of Li2CO3. The impurities (such as K, Na, Ca and Mg) could be removed in the process. The purity of product decreased and the impurity contents increased after 4 cycles. At the same time, the ion-exchange process by D412 resin was used to deeply remove the residual Ca and Mg after the simple carbonation-decomposition and cycle process. The comparison of different flowing speed of solution through the ion-exchange resin indicated that the low flowing speed was beneficial for the deep removal of the Ca and Mg. considering the problem of efficiency, the flowing speed of 10-20 ml/min was appropriate. The high purity and productivity of Li2CO3 indicated that the carbonation-decomposition method combining with the mother liquor cycles and ion-exchange method has a good perspective in the field of lithium carbonate purification.

scholarly journals Preparation of CuHY catalyst via solid-state ion exchange method and its catalytic performance in isobutane/2-butene alkylation

RSC Advances ◽  
2021 ◽  
Vol 11 (37) ◽  
pp. 23045-23054
Author(s):  
Xinyan Sun ◽  
Xiang Zhang ◽  
Tao Zheng ◽  
Haiyan Liu ◽  
Rui Zhang ◽  
...  
Keyword(s):  
Solid State ◽  
Ion Exchange ◽  
Catalytic Performance ◽  
Exchange Method ◽  
Hy Zeolite ◽  
Ion Exchange Method

CuHY prepared by solid-state ion exchange of HY zeolite with CuCl was used as a catalyst in isobutane/2-butene alkylation. The selectivity of C8 and trimethylpentanes over CuHY in alkylate are improved compared with those of HY.

Ion Exchange Method for Phenylpropanolamine Hydrochloride in an Elixir

1970 ◽  
Vol 53 (1) ◽  
pp. 116-117
Author(s):  
Donald J Smith
Keyword(s):  
Ion Exchange ◽  
Cation Exchange ◽  
Positive Charge ◽  
Exchange Resin ◽  
Collaborative Study ◽  
Cation Exchange Resin ◽  
Sulfonated Polystyrene ◽  
Exchange Method ◽  
Phenylpropanolamine Hydrochloride ◽  
Ion Exchange Method

Abstract Phenylpropanolamine is retained on a sulfonated polystyrene cation exchange resin by the positive charge located in the cationic center of the molecule. Phenylpropanolamine hydrochloride is eluted from the column with 0.27N HCl and determined by UV absorption. Duplicate recoveries were 101 and 101%. The method is recommended for collaborative study.

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