| abstract |
Describes a method of continuous transesterification of dimethyl or diethyl terephthalate with ethylene glycol, propylene glycol or butylene glycol with the presence of a transesterification catalyst, in which a mixture of transesterified starting materials is fed into a reactor, in which it passes sequentially through channels or reaction tubes and, upon leaving this stage, is fed to the column tray, respectively ... There, the reaction mixture undergoes mass exchange and energy exchange, together with the vapors of the subsequent stages flowing towards it, before it is sent to the channels or pipes of the reaction of the next stage and, ultimately, the transesterification product is taken from the reactor. |