| abstract |
The present invention relates to: relates to an amination process for the manufacture of polyamines. The purpose of the process is to increase the selectivity of linear amined products, and to prevent the formation of colored by-products or by-products that may later cause discoloration. According to the process this is achieved by performing, in a first part of the process, the amination to a conversion degree of between 50 and 98% by weight, calculated on the total yield of polyamines, at an average temperature proportionally weighted in time, the which is at least 15 C higher than the average temperature proportionally, weighted in time in the remaining part |