abstract |
(57) [Summary]nThe present invention relates to an amination process for producing a polyamine. The purpose of this process is to increase the selectivity of the linear amination product and to prevent the formation of by-products that cause discoloration or that may cause discoloration later. According to this process, in the first part of the process, at a proportionally time-weighted average temperature of at least 15 ° C. higher than the proportionally time-weighted average temperature of the rest of the process, This is achieved by calculating the total yield and performing the amination to a conversion of 50-90% by weight. |