Method and device for continuously producing polyester modified trimonomer

The invention provides a method and a device for continuously producing a polyester modified trimonomer. According to the method, no catalyst is used, and the chemical reaction formula is disclosed inthe invention; the polyester modified trimonomer is bis (2-hydroxyethyl) isophthalate-5-sodium sulfonate (SIPE). The beneficial effects are that isophthalic acid-5-sodium sulfonate and ethylene glycol are directly esterified, so that the problem of unstable transesterification rate of transesterification reaction in a traditional SIPM production process for preparing SIPE is solved. Besides, no catalyst is needed to be added in the production process of the process method, and a byproduct is water, so that the environmental pollution is effectively reduced. According to the process method anddevice for continuously producing the polyester modified trimonomer, continuous production of SIPE is achieved, the SIPE with the high esterification rate can be stably produced, the product qualityis improved, and the produc