| abstract |
The present invention provides a kind of synthetic method of Sodium Dimethyl Isophthalate-5-sulfonate, including a sulfonation procedure, secondary sulfonation procedure, esterif iotacation step, water-washing step, neutralization procedure, decolorizing purification step, filtration step, crystal refining step.The invention has the following beneficial effects: the process that the present invention is formed keeps sulfonating reaction process easily controllable, sulfonating reaction effect is improved, reduces sulfonation raw material usage amount；Shorten the reaction time of sulfonation process；Reduce the reaction temperature of sulfonation process；Reduce sulfonating reaction raw material dosage；Inhibit the generation of by-product in reaction process；Improve sulfonated product purity, yield. |