摘要:
The present invention relates to a process for improving the color stability by postpurifying piperazine, the steps comprising preparing an aqueous piperazine solution by introducing solid or liquid piperazine having a degree of purity of at least 90% by weight in water; removing the water by distillation; isolating the piperazine with a predefined maximum residual content of water. The invention further provides a rapid test of aging for checking the improvement in the color stability.
摘要:
The present invention relates to a process for improving the color stability by postpurifying piperazine, the steps comprising preparing an aqueous piperazine solution by introducing solid or liquid piperazine having a degree of purity of at least 90% by weight in water; removing the water by distillation; isolating the piperazine with a predefined maximum residual content of water. The invention further provides a rapid test of aging for checking the improvement in the color stability.
摘要:
Processes comprising: providing a starting material comprising monoethanolamine; and reacting the starting material with ammonia in the presence of a heterogeneous transition metal catalyst to form a reaction product comprising one or more ethylene amines; wherein the catalyst comprises a catalytically active composition, which prior to treatment with hydrogen, comprises a mixture of oxygen-containing compounds of aluminum, copper, nickel and cobalt; and wherein the catalyst is present as one or more shaped catalyst particles selected from spheres, extrudates, pellets and other geometries, wherein the sphere or extrudate has a diameter of
摘要翻译:方法包括:提供包含单乙醇胺的原料; 并在非均相过渡金属催化剂的存在下使原料与氨反应形成包含一种或多种亚乙基胺的反应产物; 其中所述催化剂包含催化活性组合物,其在用氢处理之前包括铝,铜,镍和钴的含氧化合物的混合物; 并且其中所述催化剂作为选自球体,挤出物,丸粒和其它几何形状的一种或多种成型催化剂颗粒存在,其中所述球体或挤出物的直径<3mm,所述颗粒具有<3mm的高度,而另一种 几何形状具有等效直径L = 1 / a'<0.70mm,其中a'是每单位体积的外表面积(mms2 / mmp3),由'= A p V p定义,其中Ap是外表面积 的催化剂颗粒(mms2),Vp是催化剂颗粒的体积(mmp3)。
摘要:
Processes comprising: providing a starting material comprising monoethanolamine; and reacting the starting material with ammonia in the presence of a heterogeneous transition metal catalyst to form a reaction product comprising one or more ethylene amines; wherein the catalyst comprises a catalytically active composition, which prior to treatment with hydrogen, comprises a mixture of oxygen-containing compounds of aluminum, copper, nickel and cobalt; and wherein the catalyst is present as one or more shaped catalyst particles selected from spheres, extrudates, pellets and other geometries, wherein the sphere or extrudate has a diameter of
摘要:
Process for the preparation of ethylenamines, in particular diethylenetriamine (DETA), by continuous reaction of ethylenediamine (EDA) in the presence of a heterogeneous catalyst, where the reaction is carried out in a reaction column.
摘要:
Preparation of ethyleneamines by reacting monoethanolamine (MEOA) with ammonia in the presence of a catalyst in a reactor (1) and separating the resulting reaction product, where ethylenediamine (EDA) obtained in the separation is reacted in a separate reactor (2) in the presence of a catalyst to give diethylenetriamine (DETA), and the resulting reaction product is passed to the separation of the reaction product resulting from reactor 1.
摘要:
Preparation of ethyleneamines by reacting monoethanolamine (MEOA) with ammonia in the presence of a catalyst in a reactor (1) and separating the resulting reaction product, where ethylenediamine (EDA) obtained in the separation is reacted in a separate reactor (2) in the presence of a catalyst to give diethylenetriamine (DETA), and the resulting reaction product is passed to the separation of the reaction product resulting from reactor 1.
摘要:
Process for the preparation of ethylenamines, in particular diethylenetriamine (DETA), by continuous reaction of ethylenediamine (EDA) in the presence of a heterogeneous catalyst, where the reaction is carried out in a reaction column.
摘要:
The present invention relates to a process for preparing triethylenediamine (TEDA) derivatives, comprising the following steps: a) reacting a dihydropyrazine with an olefin, b) if appropriate hydrogenating after step a). The present invention further also relates to novel TEDA derivatives as such and to their use as incorporable polyurethane catalysts.
摘要:
A process for preparing ethylene amines and ethanolamines by hydrogenative amination of monoethylene glycol and ammonia in the presence of a catalyst, wherein a catalyst having an active composition comprising ruthenium and cobalt and no further additional metal of group VIII and also no metal of group IB is used in the form of shaped catalyst bodies which in the case of a spherical shape or rod shape in each case have a diameter of