A kind of technique for preparing dimethyl isophthalate-5-sodium sulfonate
A technology of dimethyl isophthalate and sodium sulfonate, applied in the preparation of sulfonate, organic chemistry and other directions, can solve the problems of many impurities, environmental pollution, difficulty in recycling and treatment, etc.
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[0009] Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings.
[0010] refer to figure 1, the process for preparing dimethyl isophthalate-5-sodium sulfonate is composed of sulfonation kettle A, esterification kettle B, extraction kettle C, stripping kettle D, decolorization gettering kettle E, filter F, intermediate Crystallization kettle G, centrifugal dehydrator H, thermal melting kettle J, fine filter K, terminal crystallization kettle L, secondary dehydrator M, and dryer N are process equipment, which are connected by pipelines to form a production line. Nicotinic sulfuric acid 2 is the main raw material, after the sulfonation process, esterification process, extraction and stripping process, decolorization and impurity removal and filtration process, intermediate crystallization and dehydration process, hot melting and fine filtration process, terminal crystallization dehydration and drying process In the proc...
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