PROCESS FOR THE CHEMICAL RECOVERY OF WASTES RESULTING FROM DIAMINODIPHENYLMETHANE PREPARATION

The invention relates to a process for the chemical recovery of wastes resulting from diaminodiphenylmethane preparation, by the conversion thereof into aminic polyols as intermediates for the preparation of rigid polyurethane foams, to be applied inthe heat insulations industry. There takes place a...

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Bibliographische Detailangaben
Hauptverfasser:	STOICA DUMITRU, ZUGRAVU VIORICA TATIANA, BOTEZATU PETRE, IONESCU MIHAIL, MIRON ADA MARGARETA, TIMPOC DINU, MIHIS ANA-BIANCA, MIHAI STANCA, MIHALACHE IOANA
Format:	Patent
Sprache:	eng ; rum
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY COMPOSITIONS BASED THEREON GENERAL PROCESSES OF COMPOUNDING MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP WORKING-UP
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Beschreibung
Zusammenfassung:	The invention relates to a process for the chemical recovery of wastes resulting from diaminodiphenylmethane preparation, by the conversion thereof into aminic polyols as intermediates for the preparation of rigid polyurethane foams, to be applied inthe heat insulations industry. There takes place a reaction of polyoxyalkylation of the mixture of polyaminic products resulting as waste, by additioning the same with alkyleneoxides, in the presence of a slightly stearically hindered fatty amine. Prezenta inventie se refera la un procedeu de recuperare chimica a deseurilor rezultate de la fabricarea diaminodifenilmetanului, prin transformarea acestora în polioli aminici, intermediari pentru obtinerea spumelor poliuretanice rigide, cu aplicabilitate în industria de termoizolatii. Se realizeaza o reactie de polioxialchilare a amestecului de produse poliaminice, rezultat ca deseu, prin aditionare de alchilenoxizii, în prezenta unei amine alifatice, putin împiedicate stearic.