Hydrolysis of acetic anhydride is a fast and very exothermic reaction that has been studied with different analytical techniques to account for the reaction progress. This work presents the real-time monitoring of the hydrolysis of acetic anhydride using in situ NIR and UV–Vis spectroscopy, under ...
The spontaneous and the acid-catalyzed hydrolyses of acetic anhydride have been measured as a function of temperature over the range 0 to 40 °C, as a function of pressure over the range 0 to 3kb at 0 °C, and as a function of solvent over the range 0 to 70.3% w/w acetone–water...
In II the velocity constant is lower than in I and decreases linearly with increasing concentration of MEK, but, again, the reaction is pseudomonomolecular for any given initial concentration of acetic anhydride. An equation and a nomogram that relate the velocity constant to the initial ...
et al. Applications of temperature scanning in kinetic investigations: The hydrolysis of acetic anhydride. Chemical Engineering Science 1996, 51, 4681. (2) Samant, K.D.; Ng, K.M. Effect of Kinetics and Mass Transfer on Design of Extractive Reaction Processes. AIChE Journal 1998, 44, 2212....
The kinetic modelling of the batch synthesis of acetic acid from acetic anhydride was investigated. The kinetic data of the reaction was obtained by conducting the hydrolysis reaction in a batch reactor. A dynamic model was formulated for this process and simulation was carried out using gPROMSR ...
1 h. The completeness of each coupling reaction was monitored by the chloranil test. The acetylation of the N-termini of peptides was obtained using 10% acetic anhydride in DCM. The protected peptidyl resins were treated with cleavage cocktail – a mixture of 94% TFA, 1% ...
The Hydrolysis of Carboxylic Anhydrides. V.1,2 The Acid Hydrolysis of Acetic and Trimethylacetic Anhydride The acid hydrolysis of trimethylacetic anhydride follows an A-2 mechanism in both water and aqueous dioxane and is slower than that of acetic anhydride. These observations suggest that the ...
该中间体受热脱水和水解得到不饱和羧酸 The acetic anhydride loses the hydrogen atom under the alkali function, the production acetic anhydride anoin, this anoin and the benzene has the nucleophilic addition reaction to obtain the carboxyl group acid anhydride intermediate, this intermediate being heated...
This invention is to compatibility aids containing polyolefinic succinimide polyamide alkyl acetoacetate or trialkyl acetic anhydride adducts of the general formula: ##STR1## wherein Z 1 and Z 3 are the same or different and are moitie... A Gutierrez,J Emert,RA Kleist,... - US 被引量: ...
The reaction mixture is refluxed at 100± under continuous stirring. After 13 hr the pH is adjusted to 6-7 by dropwise addition of acetic acid and the solution is dried in a rotary evaporator at 50±. The residue is dissolved in a few milliliters of water and applied to 5 × 2-cm ...