PURPOSE:To dissolve a trouble due to clogging at the beginning of ester exchange reaction, by reacting a lower alkyl ester of a discarboxylic acid and glycol, with the inside of a fractionating tower-being wetted with a lower alcohol or glycol. CONSTITUTION:In the ester exchange reaction, in...
Ester, any of a class of organic compounds that react with water to produce alcohols and organic or inorganic acids. Esters derived from carboxylic acids are the most common. Learn about the different types and reactions of esters and more in this articl
摘要: Reaction products of hydrocarbylcarboxylic anhydrides and aminoalkanols can provide effective antiwear, antirust, and corrosion- inhibiting properties in lubricant and fuel applications.收藏 引用 批量引用 报错 分享 文库来源 其他来源 求助全文 CARBOXYLIC ACIDESTER PRODUCTS AS MULTIFUNCTIONAL 优质文献...
A liquid phase containing the carboxylic acid component, e.g. a fatty acid mixture, flows down the column reactor from one esterification tray to the next downward one against an upflowing alcohol vapour stream, e.g. methanol vapour. Relatively dry alcohol vapour is injected (21) into the ...
A method of synthesizing esters by reacting a carboxylic acid with an alcohol, an ester with a carboxylic acid, or an ester with an alcohol. This method is characterized in that a partially dehydrated solid of a metal hydroxide whose metal belongs to Group III or IV of the Periodic Table ...
The reaction is extremely tolerant to a wide variety of functional groups such as carboxylic acids, esters, alcohols, aldehydes, and ketones and this is one of the reasons for its popularity in natural product synthesis. An example of the synthesis of a simple 2,2′-bipyridine derivative19 is...
EtAlCl2 in CH2Cl2 was found to be a more effective catalyst for this reaction since it can act as a proton scavenger as well as a Lewis acid.54 Optimal yields are usually obtained with close to 1 equiv. of catalyst since the product α,β-unsaturated ester is more basic...
Evidence is presented suggesting that alcoholysis and ester formation (Reactions 1 and 2), catalyzed by carboxylic acids, are important reactions of esters that could lead to larger molecules. Acidolysis (Reaction 3) proceeded at a comparatively slow rate and ester exchange reaction products (...
In this treatise, a uniform picture emerges for the role of this group: it primarily acts as an electron-withdrawing group that lowers the pKa of the neighbouring boronic acid thereby facilitating diol binding at neutral pH. The amine appears to play no role in the modulation of the ...
Is characterized by using an iridium catalyst, carrying out the hydrogenation in the homogeneous reaction mixture, anhydrides of polycarboxylic acid anhydrides or cyclic dicarboxylic acid anhydride, with hydrogen in the presence of a homogeneous noble metal catalyst groups: -C (O) -O-C (O) - due...