integrated process to manufacture polyethyleneamine compounds selected from the group of polyethyleneamines and hydroxyethylethyleneamines

摘要

the invention relates to a process for making polyethyleneamine compounds selected from the group of polyethyleneamines and hydroxyethylethyleneamines which comprises the steps of - in an adduction step, providing a co2 adduct of a starting compound comprising a chemical portion? nh -ch2-ch2-nh- or a chemical portion? nh-ch2-ch2-oh, or ho-ch2-ch2-oh, - in a reaction step, react a hydroxy functional compound selected from the group of ethanolamines and dihydroxyethane with an amine functional compound, where at least part of the total hydroxy functional compounds and amine functional compounds is supplied in the form of a co2 adduct, to form the co2 adduct of a product polyethyleneamine compound, - in an elimination step, convert the co2 adduct of the product polyethyleneamine compound to the corresponding product polyethylene amine compound, wherein a fraction comprising a recycling compound comprising a chemical moiety? n h-ch2-ch2-nh- or a chemical portion? nh-ch2-ch2-oh, or ho-ch2-ch2-oh, or co2 adducts thereof, is provided at the end of the reaction step or the elimination step to the adduction or reaction step, the recycling compound that has, on average, less of the total chemical portions? nh-ch2-ch2-nh- and chemical portions? nh-ch2-ch2-oh than the product polyethyleneamine compound.