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.)
Consortium fuer Elektrochemische Industrie GmbH
Original Assignee
Consortium fuer Elektrochemische Industrie GmbH
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.)
Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications
(AREA)
Abstract
Process for manufacturing partially polyvinyl alcohol acylated by saponification of carboxylic esters of polyvinyl alcohol, especially polyvinyl acetate, in the presence of water and acidic catalysts, when hot, characterized in that saponification is carried out to the desired content in acyl groups, the catalyst is inactivated of saponification, the carboxylic acid is removed by extraction using vibration, the carboxylic acid and the extraction agent are recovered in pure form by fractionation of the extract and, where appropriate, the polyvinyl alcohol solution is released from the extraction agent by distillation . (Machine-translation by Google Translate, not legally binding)
ES0232446A1956-01-251956-12-13Procedure for the manufacture of polyvinyl alcohol (Machine-translation by Google Translate, not legally binding)
ExpiredES232446A1
(en)
Procedure for treating gumorrhines provided by the cork to obtain waxes, acids and fatty hydrodates (Machine-translation by Google Translate, not legally binding)
Installation for the preparation or continuous hydrolysis of fats in fatty acids and glycerin (Machine-translation by Google Translate, not legally binding)