ES431194A1 - Procedure for the preparation of etereopolicarboxilic acids. (Machine-translation by Google Translate, not legally binding)
- Google Patents
Procedure for the preparation of etereopolicarboxilic acids. (Machine-translation by Google Translate, not legally binding)
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Henkel AG and Co KGaA
Original Assignee
Henkel AG and Co KGaA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Henkel AG and Co KGaAfiledCriticalHenkel AG and Co KGaA
Priority to ES431194ApriorityCriticalpatent/ES431194A1/en
Publication of ES431194A1publicationCriticalpatent/ES431194A1/en
Organic Low-Molecular-Weight Compounds And Preparation Thereof
(AREA)
Abstract
Procedure for the preparation of ether polycarboxylic acids, characterized by reacting ether carboxylic acids of the general formula with carbonic anhydride R - O-CHR'- COOH, in which R represents an alkyl radical of 1 to 22 carbon atoms, which may be straight-chain or branched-chain and be substituted by hydroxyl or carboxyl groups or interrupted by oxygen atoms and R'represents hydrogen or a lower alkyl radical of 1 to 4 carbon atoms, in the form of their alkaline salts, at temperatures from 200 to 350ºC and preferably from 250 to 300ºC, under pressure (preferably greater than 200 absolute atmospheres) in the presence of alkali carbonates, alkali hydrocarbonates or alkali hydroxides and optionally from heavy metal catalysts as well as from indifferent diluents, and optionally converted into the free acid, the alkali salt formed from the ether polycarboxylic acid. (Machine-translation by Google Translate, not legally binding)
ES431194A1974-10-211974-10-21Procedure for the preparation of etereopolicarboxilic acids. (Machine-translation by Google Translate, not legally binding)
ExpiredES431194A1
(en)
Procedure for the preparation of new acids 4- (4 bifenilil) -4-hydroxy-butirrics, its esteres or lactonas. (Machine-translation by Google Translate, not legally binding)