scholarly journals Prediction of Hydroxymethylfurfural Yield in Glucose Conversion through Investigation of Lewis Acid and Organic Solvent Effects

ACS Catalysis ◽  
2020 ◽  
Vol 10 (24) ◽  
pp. 14707-14721
Author(s):  
Yeonjoon Kim ◽  
Ashutosh Mittal ◽  
David J. Robichaud ◽  
Heidi M. Pilath ◽  
Brian D. Etz ◽  
...  
Keyword(s):  
Organic Solvent ◽  
Lewis Acid ◽  
Solvent Effects

Lewis basicity of relevant monoanions in a non-protogenic organic solvent using a zinc(ii) Schiff-base complex as a reference Lewis acid

2017 ◽  
Vol 46 (35) ◽  
pp. 11608-11614 ◽  
Author(s):  
Ivan Pietro Oliveri ◽  
Santo Di Bella
Keyword(s):  
Schiff Base ◽  
Organic Solvent ◽  
Lewis Acid ◽  
Schiff Base Complex ◽  
Base Complex ◽  
First Time

The Lewis basicity of relevant anions is reported for the first time and compared with that of neutral bases.

scholarly journals Improvement of the selectivity of isophorone hydrogenation by Lewis acids

2018 ◽  
Vol 5 (5) ◽  
pp. 171523 ◽  
Author(s):  
Yucui Hou ◽  
Shuhang Ren ◽  
Muge Niu ◽  
Weize Wu
Keyword(s):  
Organic Solvent ◽  
Lewis Acid ◽  
Selective Hydrogenation ◽  
Lewis Acids ◽  
High Selectivity ◽  
Positive Impact

The selective hydrogenation of isophorone (3,5,5-trimethyl-2- cyclohexen-1-one) to produce 3,3,5-trimethylcyclohexanone (TMCH), an important organic solvent and pharmaceutical intermediate, is of significance in industry. However, the over-hydrogenation to produce the by-product 3,3,5-trimethylcyclohexanol causes issues. Up to now, it is still a challenge to hydrogenate isophorone to TMCH with high selectivity. In this work, we found that Lewis acids could inhibit the hydrogenation of C=O bond on isophorone, thus greatly improving the selectivity towards TMCH. In addition, added solvents like supercritical CO 2 also had a positive impact on the selectivity. Both the conversion and selectivity could be increased to more than 99% when suitable Lewis acid and solvent were employed. Nevertheless, Lewis acid also exhibited some inhibition on the hydrogenation of the C=C bond of isophorone. Hence, a relatively weak Lewis acid, ZnCl 2 , is suitable for the selective hydrogenation.

Blister Artifact Formation Due to Organic Solvent Effects on Spurr's Epoxy Resin

1998 ◽  
Vol 73 (3) ◽  
pp. 157-163
Author(s):  
Semithin Sections ◽  
Robert J. Kayton ◽  
Ranan G. Aktas
Keyword(s):  
Organic Solvent ◽  
Epoxy Resin ◽  
Solvent Effects ◽  
Artifact Formation

Solvent effects on dissociation of substituted benzenesulphonamides in acetone, 1,2-dichloroethane, tetramethylene sulphone, pyridine and some aqueous organic solvent mixtures

1986 ◽  
Vol 51 (9) ◽  
pp. 1948-1957 ◽  
Author(s):  
Miroslav Ludwig ◽  
Oldřich Pytela ◽  
Miroslav Večeřa
Keyword(s):  
Organic Solvent ◽  
General Formula ◽  
Potentiometric Titration ◽  
Solvent Effects ◽  
Dissociation Constants ◽  
Dimethyl Sulphoxide ◽  
Organic Component ◽  
Solvent Mixtures

The potentiometric titration has been used to measure dissociation constants of fifteen substituted arenesulphonamides of general formula XC6H4SO2NH2 (or X2C6H3SO2NH2) in acetone, 1,2-dichloroethane, tetramethylene sulphone, pyridine, and mixtures water-ethanol (25, 50, 75, 90% by vol. of the organic component), water-dimethylformamide (25, 50, 75% by vol.), water-acetone (25% by vol.), and water-2-methoxyethanol (80% by wt.). The results are compared with those published earlier for water, methanol, ethanol, dimethylformamide, dimethyl sulphoxide, and acetonitrile.

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