By a method comprising the steps of removing from the carboxylic acid esters and soaps of sulfur contaminants: (1) an aqueous solution of the carboxylic acid ester is contacted with a base at a temperature of about about 225 ° F ~ 280 ° F, while water was removed to yield The dried ...
Method for making anhydride from ester using a palladium-containing catalyst systemMethylene and oxymethylene bis-esters are produced by the reaction of an aliphatic ester of a carboxylic acid, formaldehyde and carbon monoxide in the presence of a catalytic amount of a Group VIII noble transition ...
Processes for making storage-stable epoxy-capped polyetherester resins are disclosed. In one process, a polyetherester resin is first made by inserting a carboxylic acid derivative into a polyether. Reacting the resin with a capping agent gives an intermediate resin with a reduced content of free ...
The present invention relates to a process for preparing an unsaturated carboxylic acid or its ester from the ammonium salt of a hydroxycarboxylic acid. BACKGROUND OF THE INVENTION Acrylic acid is currently made commercially by the two-step oxidation of propylene. More recent, but not-yet-commer...
Similarly, when a polybasic acid is available in:the form of an anhydride, such anhydride is apt to produce the ester with greater ease than the acid itself. For this reason, maleic anhydride is' particularly adaptable, and also everything else considered, the cost is comparatively low on a...
【英文名】:NH-bis(PEG4-Boc),Nh-bis(peg4-t-butyl ester) 【CAS号】:2055041-41-1 【化学式】:C30H59NO12 【分子量】:625.8 【结构式】: 二、产品详情 【外观】:固体/粉末 【溶解性】:溶于大部分有机溶剂 【规格】:10mg、25mg、50mg(接受各种规格的定制服务,具体可以线上咨询) ...
Cosmetics Materials Cas 68603-42-9 Coconut Oil Fatty Acid Cdea 6501 For Making Shampoo Toothpaste, You can get more details about Cosmetics Materials Cas 68603-42-9 Coconut Oil Fatty Acid Cdea 6501 For Making Shampoo Toothpaste from mobile site on Alibab
(hydroxy ester ethers)(PHEE) made with various difunctional acids such as adipic acid. However, uses of this composition may be extremely limited due to the low glass transition temperature of the PHEE made with adipic acid. Most articles formed from this composition easily softened and lost ...
Process for the preparation of polyether-ester polyols Polyether-ester polyols are prepared in the presence of from 0. 005 percent to 0.01 percent by weight (50-100 ppm) of a trialkylamine. The resulting polyols have improved color and are obtained in markedly reduced reaction times. JR Murphy...
专利内容由知识产权出版社提供 专利名称:METHOD FOR MAKING A PROLINEBORONATE ESTER 发明人:SNOW, Roger,KELLY, Terence, A.,ADAMS, Julian,COUTTS, Simon,PERRY, Clark 申请号:EP92925238.0 申请日:19921119 公开号:EP 064 134 7A1 公开日:19950308 摘要:A kind of description preparing prolineboronic acid ...