| 摘要 |
The present invention relates to a continuous process for the production of polyadducts of alkylene oxide on a chain initiator which has at least one active hydrogen, characterised in that it comprises the steps of; a) providing n reaction units, where n is a whole number from 2 to 100, each constituted by a tubular reactor (11), and a heat exchanger (14) downstream of the tubular reactor (11), the tubular reactor (11) having at least one first supply device (13) for supplying the alkylene oxide, at least one second supply device (12) and an outlet aperture (15); b) supplying the reactor of a first of the n reaction units with the chain initiator, preheated to a predetermined temperature, through the at least one second supply device (12) and with the alkylene oxide through the at least one first supply device (13); c) reacting the chain initiator with the alkylene oxide to obtain a first liquid mixture containing an intermediate product; d) cooling the first liquid mixture by means of the heat exchanger (14); e) supplying the reactor (11) of a second of the n reaction units with the first liquid mixture by means of the at least one second supply device (12) and with the alkylene oxide by means of the at least one first supply device (13); f) reacting the first liquid mixture with the oxide to obtain a second liquid mixture; g) repeating the steps d), e) and f) in each of the remaining n-2 reaction units to obtain an nth liquid mixture containing the desired product; i) cooling and discharging the nth liquid mixture containing the desired product. The process according to the invention enables the reaction to be carried out continuously, thus increasing the overall productivity of the installation and considerably simplifying maintenance, cleaning etc. <IMAGE> |
