PRODUCTION OF ETHYLENEAMINES

PURPOSE:To improve the selectivity of diethylenetriamine to ethyleneamines by adding monoethanolamine and ethylenediamine since the initial stage of the reaction and reacting ethylene glycol with ammonia in the presence of a phosphorus-containing substance. CONSTITUTION:In a reaction between ethylen...

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Bibliographische Detailangaben
Hauptverfasser:	KUBOYAMA HISAHARU, NAGANUMA YOSHITARO, SUGIYAMA EIICHI, TOKUMOTO SHUICHI, KOMIYAMA TADASHI
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS APPARATUS THEREFOR CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY GENERAL METHODS OF ORGANIC CHEMISTRY METALLURGY ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	PURPOSE:To improve the selectivity of diethylenetriamine to ethyleneamines by adding monoethanolamine and ethylenediamine since the initial stage of the reaction and reacting ethylene glycol with ammonia in the presence of a phosphorus-containing substance. CONSTITUTION:In a reaction between ethylene glycol and ammonia in the presence of a phosphorus-containing substance, preferably a dihydrogenphosphate, a dihydrogenpyrophosphate, phosphoric acid, pyrophosphoric acid or phosphorous acid, at the initial stage of the reaction, monoethanolamine in an amount of 0.01-1, preferably 0.1-0.5 molar ratio based on ethylene glycol and ethylenediamine in an amount of 0.01-10, especially 0.3-1 molar ratio based on ethylene glycol are respectively added. The reaction is carried out preferably at 250-300 deg.C and 200-500kg/cm G. By using this method, the composition distribution of the products is changed so that diethylenetriamine, a higher-grade compound than ethylenediamine can be increased.