Application of a mordenite membrane to the esterification of acetic acid and alcohol using sulfuric acid catalyst

2016 ◽  
Vol 233 ◽  
pp. 171-176 ◽  
Author(s):  
Mei-Hua Zhu ◽  
Zi-Jun Feng ◽  
Xue-Mei Hua ◽  
Hai-long Hu ◽  
Shui-Lian Xia ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Sulfuric Acid ◽  
Acid Catalyst ◽  
Sulfuric Acid Catalyst ◽  
Mordenite Membrane

scholarly journals SYNTHESIS OF ESTERS OF HALOGENOACETIC ACIDS

2020 ◽  
Vol 2020 (3) ◽  
pp. 38-43
Keyword(s):  
Acetic Acid ◽  
Acid Catalyst ◽  
Primary Amines ◽  
Primary Alcohols ◽  
Sulfuric Acid Catalyst ◽  
Nucleophilic Exchange ◽  
Pmr Spectra ◽  
High Yields ◽  
Esterification Reactions ◽  
Acetic Acids

Amidoalkylating reagents containing a phthalimide group are used in the synthesis of hard-to-reach primary amines and complex heterocyclic compounds. These types of amidoalkylating compounds are suitable reagents for nucleophilic substituted reactions in acidic media due to their resistance to acids. Result of reactions of amidoalkylating reagents-N-hydroxyethylphthalimide and N-hydroxymethylphthalimide with aliphatic carbonic acids can also produce new bactericidal and fungicidal esters. In this study, halogen acids reacted with N-hydroxymethylphthalimide monochloric acetic acid, monobromic acetic acid, monoiodic acetic acid, trifluoric acetic acid and trichloroacetic acid, as well as, N-b-hydroxyethylphthaleidyl monohydric acid. As a result of the reactions, new phthalimidomethyl and phthalimidoethyl esters of haloacetic acids were synthesized. The physical properties of crystalline esters have been determined. The structure of these compounds were confirmed by the analysis of their IR and PMR spectra. The esterification reactions of halogenated acetic acids were carried out in a benzene solvent and a sulfuric acid catalyst with primary alcohols, N-hydroxymethylphthalimide and N-β- beta hydroxyethylphthalimide,. It was found that in a benzene solvent, which increases the rate of bimolecular nucleophilic exchange in primary alcohols, phthalimidoethyl esters of halogen acid are formed in high yields, and phthalimidomethyl esters are formed in low yields. It was shown that the reaction of esterification of halogen acids with N-hydroxymethylphthalimide proceeds with monomolecular nucleophilic exchange.

scholarly journals The paper-forming properties of hemp fire peroxide cellulose in combination with wood sulphate cellulose

2021 ◽  
Vol 2094 (5) ◽  
pp. 052043
Author(s):  
R A Marchenko ◽  
R Z Pen ◽  
I L Shapiro ◽  
Y A Ambrosovich
Keyword(s):  
Hydrogen Peroxide ◽  
Sulfuric Acid ◽  
Cannabis Sativa ◽  
Sulfuric Acid Concentration ◽  
Acid Catalyst ◽  
Strength Properties ◽  
Mixed Composition ◽  
Deciduous Wood ◽  
Sulfuric Acid Catalyst ◽  
Hardwood Pulp

Abstract Hemp fire (Cannabis sativa) was delignified with the reaction mix “acetic acid - hydrogen peroxide - sulfuric acid catalyst - water” under sulfuric acid concentration of 0.45%, liquid module of 6, and temperature of 85 ° C. The cellulose was ground to 34 … 36°SHR and mixed in different ratios in compliance with the simplex-centroid experimental design with bleached sulfate softwood and hardwood pulp. The influence of the mixed composition formulations on the main strength properties of paper castings has been studied. It has been concluded that technical cellulose obtained from hemp fire applying this method, can be used for paper products manufacturing in combination with sulphate cellulose from coniferous and deciduous wood.

scholarly journals The Influence of Sulfuric Acid Catalyst Concentration on Hydrolysis of Birch Wood Hemicelluloses

2015 ◽  
Vol 8 (2) ◽  
pp. 211-221 ◽  
Author(s):  
Olga V. Yatsenkova ◽  
◽  
Anna I. Chudina ◽  
Nikolay V. Chesnokov ◽  
Andrey M. Skripnikov ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Catalyst Concentration ◽  
Acid Catalyst ◽  
Birch Wood ◽  
Sulfuric Acid Catalyst ◽  
Hydrolysis Of
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