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Application filed by Basf Se, Dow Chemical CofiledCriticalBasf Se
Publication of MY144850ApublicationCriticalpatent/MY144850A/en
Organic Low-Molecular-Weight Compounds And Preparation Thereof
(AREA)
Separation Using Semi-Permeable Membranes
(AREA)
Vaporization, Distillation, Condensation, Sublimation, And Cold Traps
(AREA)
Abstract
THE PRESENT INVENTION RELATES TO A PROCESS FOR SEPARATING AT LEAST ONE PROPYLENE GLYCOL FROM A MIXTURE (M) COMPRISING WATER AND SAID PROPYLENE GLYCOL, SAID PROCESS COMPRISING (I) EVAPORATING THE MIXTURE IN AT LEAST TWO EVAPORATION AND/OR DISTILLATION STAGES AT DECREASING OPERATING PRESSURES OF THE EVAPORATORS AND/OR DISTILLATION COLUMNS OBTAINING MIXTURE (M') AND MIXTURE (M"); (I I) SEPARATING THE MIXTURE (M') OBTAINED IN (I) IN AT LEAST ONE FURTHER DISTILLATION STEP, OBTAINING A MIXTURE (M-I) COMPRISING AT LEAST 70 WT.-% OF WATER AND A MIXTURE (M-II) COMPRISING LESS THAN 30 WT.-% OF WATER.
MYPI200823912005-12-292006-12-13A process for separating propylene glycol from aqueous compositions
MY144850A
(en)
Use of partly pre-hydrated lime for separating a mixture of solid/liquid matters, method for treating sludge and purified sludge obtained by said method