ChemInform Abstract: ALKYLATIONS IN THE ABSENCE OF AN ORGANIC SOLVENT. EFFECTS OF THE ADDITION OF MINERAL OXIDES AND AMMONIUM SALTS. II. EASY SYNTHESIS OF ESTERS BY ALKYLATION N OF THE ACETATE ANION UNDER SOFT, ECONOMICAL CONDITIONS

1983 ◽  
Vol 14 (51) ◽  
Author(s):  
J. BARRY ◽  
G. BRAM ◽  
G. DECODTS ◽  
A. LOUPY ◽  
P. PIGEON ◽  
...  
Keyword(s):  
Organic Solvent ◽  
Solvent Effects ◽  
Ammonium Salts ◽  
Acetate Anion ◽  
Mineral Oxides

ChemInform Abstract: Synthesis of Primary Amides by Lipase-Catalyzed Amidation of Carboxylic Acids with Ammonium Salts in an Organic Solvent.

ChemInform ◽  
2010 ◽  
Vol 30 (45) ◽  
pp. no-no
Author(s):  
Mike J. J. Litjens ◽  
Adrie J. J. Straathof ◽  
Jaap A. Jongejan ◽  
Joseph J. Heijnen
Keyword(s):  
Organic Solvent ◽  
Carboxylic Acids ◽  
Ammonium Salts

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

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

scholarly journals Degradation Kinetics and Solvent Effects of Various Long-Chain Quaternary Ammonium Salts

2021 ◽  
Author(s):  
Roel Kleijwegt ◽  
Wyatt Winkenwerder ◽  
Wim Baan ◽  
John van der Schaaf
Keyword(s):  
Thermal Stability ◽  
Solvent Effects ◽  
Quaternary Ammonium ◽  
Degradation Kinetics ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
Polar Solvents ◽  
Kinetics Of ◽  
Thermal Stability Of ◽  
Long Chain

<div>Surfactants such as quaternary ammonium salts (QAS) have been in increasing demand, for emerging new applications. Recent attempts at process intensification of</div><div>their production, have disclosed the need for a better understanding of QAS thermal stability. This work aims to determine degradation kinetics of various QASs, and the</div><div>associated solvent effects. Degradation kinetics of four methyl carbonate QASs were determined in various</div><div>polar solvents in stainless steel batch autoclaves. <sup>1</sup>H NMR spectrometry was employed for online analysis of the reaction mixtures. The kinetic parameters were then used</div><div>to compare the thermal stability of the four compounds in the polar solvents. Water showed not degradation, and methanol (MeOH) was the solvent that provided the</div><div>second-best stability. Water-MeOH mixtures may provide an overall optimum. More, and longer long-chain substituents increased the degradation rate. Thermogravimetric Analysis was used to obtain the thermal stability in a solid-</div><div>state, i.e. solventless environment. Isoconversional analysis showed that no reliable kinetic parameters could be determined. Nevertheless, the data did allow for a compar-</div><div>ison of the thermal stability of 14 different QASs. Furthermore, the relative instability of the compounds in solid-state demonstrated the challenges of solventless QAS production.</div>

Sign in / Sign up

Export Citation Format

Share Document