The primary aim of this study is to develop a recovery process for PhSO3K from the industrial waste of Qpe (Quizalofop-p-ethyl) production. The solubility data for the PhSO3K-K2CO3-H2O system at 15 deg C, 25 deg C, 35 deg C, 45 deg C and 55 deg C were determined to obtain the phase diagram of the system. Moreover, the different crystallization fields in the phase diagram of 25 deg C were analyzed. The separation technology of PhSO3K from the PhSO3K-K2CO3-H2O system was designed based on the phase diagram. Furthermore, the PhSO3K and K2CO3 in a waste water from Qpe production were crystallized in sequence by evaporation according to the designed method. The organic impurities precipitated concomitantly with PhSO3K were washed out by ethanol. Finally, the purified PhSO3K was converted to (R)-ethyl O-bezenesulfonyl lactate, the intermediate of Qpe production.
Compounds
#
Formula
Name
1
CK2O3
potassium carbonate
2
C6H5KO3S
potassium benzenesulfonate
3
H2O
water
Datasets
The table above is generated from the ThermoML associated json file (link above).
POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied;
the numbers refer to the table of compounds on the left.