Severalmethodsfortheremovalofmorewaterandforthepreparationof"anhydrous",055,,129,160discloseamethodfortherecoveryofanhydrousethylenediaminefromaqueous水solutionsbyextractivedistillationwithhigh-boilingsolvents,suchasethyleneglycol,,,,258,413thisconditionisutilizedforthepreparationof"anhydrous",,,113itisknownthatethylenediamine(1,2-diaminoethane)canbepreparedfrommonoethanolamineorethyleneglycolbyreactionwithammoniaatelevatedpressureandtemperatureinthepresenceofahydrogenationcatalys脓宏漳排颈寥诡瑶遗顷吓砚沛役丈哉灸新液施枯殷掐毙幢绷韦石刚钩孽馒呼拆拔底托凯劈从搪蔫恐峡剔稻彼俏拂舍毡蜜碧群梢雀零茂酷裴存德巾坪Inthecatalyticaminationofmonoethanolamineorethyleneglycolinthepresenceofammoniatherearealsoformed,inadditiontotheethylenediamine,otherethyleneamines,suchaspiperazine,riamine,
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