[EN] PROCESS FOR CONVERTING CYCLIC ALKYLENEUREAS INTO THEIR CORRESPONDING ALKYLENEAMINES<br/>[FR] PROCÉDÉ DE CONVERSION D'ALKYLÈNE-URÉES CYCLIQUES EN LEURS ALKYLÈNE-AMINES CORRESPONDANTES
申请人:AKZO NOBEL CHEMICALS INT BV
公开号:WO2019030192A1
公开(公告)日:2019-02-14
The present invention is directed to a process for converting cyclic alkyleneureas into their corresponding alkyleneamines wherein a feedstock comprising cyclic alkyleneureas is reacted in the liquid phase with water in an amount of 0. -20 mole water per mole urea moiety, at a temperature of at least 230°C, with removal of CO2. It has been found that the process according to the invention allows the efficient conversion of alkyleneureas into the corresponding alkyleneamines. The process has a high yield and low side product production. It is preferred for the cyclic alkyleneurea to comprises one or more of EU (ethyleneurea, the urea derivative of ethylenediamine (EDA)), UDETA (the urea derivative of diethylenetriamine (DETA)), UTETA (the group of urea derivatives of triethylenetetraamine (TETA), DUTETA (the diurea derivative of triethylenetetramine), UTEPAs (the urea derivatives of tetraethylenpentamine (TEPA)), DUTEPAs (the diurea derivatives of TEPA), or urea derivatives of pentaethylenehexamine (PEHA) and higher analogues, UAEEA (the urea derivative of aminoethylethanolannine), HE-UDETA (the urea derivative of hydroxyethyl diethylenetriamine), HE-UTETA (the urea derivative of hydroxyethyl triethylenetetraamine, HE-DUTETA (the diurea derivative of hydroxyethyl triethylenetetraamine), or any mixture of these.
本发明涉及一种将环烷基脲转化为相应的烷基胺的方法,其中包括在液相中将含有环烷基脲的原料与水反应,水的量为每摩尔脲基团0. -20摩尔,反应温度至少为230°C,并去除CO2。发现该发明的方法能够高效地将烷基脲转化为相应的烷基胺。该过程产率高,副产物产量低。最好的环烷基脲包括EU(乙烯脲,乙二胺(EDA)的脲衍生物)、UDETA(二乙烯三胺(DETA)的脲衍生物)、UTETA(三乙烯四胺(TETA)的脲衍生物群)、DUTETA(三乙烯四胺的二脲衍生物)、UTEPAs(四乙烯五胺(TEPA)的脲衍生物)、DUTEPAs(TEPA的二脲衍生物)或五乙烯六胺(PEHA)的脲衍生物及更高类似物、UAEEA(氨基乙基乙醇胺的脲衍生物)、HE-UDETA(羟乙基二乙烯三胺的脲衍生物)、HE-UTETA(羟乙基三乙烯四胺的脲衍生物)、HE-DUTETA(羟乙基三乙烯四胺的二脲衍生物)或其中任意混合物。