METHOD FOR PRODUCING HIGHLY PURE MONOETHYLENE GLYCOL.

摘要

DISCLOSED IS A PROCESS FOR THE DISTILLATIVE RECOVERY OF HIGH PURITY MONOETHYLENE GLYCOL FROM THE HYDROLYSIS PRODUCT OF ETHYLENE OXIDE BY PRESSURE DEWATERING, VACUUM DEWATERING AND SUBSEQUENT PURIFYING DISTILLATION, WHICH COMPRISES THE PRESSURE DEWATERING COLUMNS OR AT LEAST THE FIRST PRESSURE DEWATERING COLUMN OF THE BATTERY (2, 3, 4) HAVING A STRIPPING SECTION WITH AT LEAST ONE SEPARATING STAGE, PREFERABLY WITH FROM 2 TO 10 SEPARATING STAGES, PARTICULARLY PREFERABLY WITH FROM 3 TO 6 STAGES, AND A PORTION OF THE OVERHEAD STREAM OF THE PRESSURE DEWATERING COLUMN(S) (2, 3, 4) HAVING A STRIPPING SECTION BEING REMOVED FROM THE SYSTEM. (FIGURE 2)