METHOD TO PRODUCE CYCLIC ESTERS

DISCLOSED IS A NOVEL INTEGRATED PROCESS FOR PRODUCTION OF CYCLIC ESTERS WHICH INCLUDES RECOVERY OF STARTING MATERIALS, SUCH AS LACTIC ACID FROM A DILUTE AQUEOUS LACTIC ACID-CONTAINING SOLUTION, BY SOLVENT EXTRACTION. THE STARTING MATERIALS ARE THEN FORMED INTO CYCLIC ESTERS BY REMOVAL OF WATER WHERE...

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Bibliographische Detailangaben
Hauptverfasser:	GEORGE E, CREMEANS, MANFRED MEISER, ALEX CHEUNG, EDWARD S. LIPINSKY, WILLIAM A. EVANKO, KEVIN H, SCHILL, MELVILLE E. D. HILLMAN, TIMOTHY J. EGGEMAN, DAN W. VERSER, ANTHONY E. ALLEN
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS ADHESIVES AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS CORRECTING FLUIDS DYES FILLING PASTES GENERAL PROCESSES OF COMPOUNDING HETEROCYCLIC COMPOUNDS INKS METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS ORGANIC CHEMISTRY ORGANIC MACROMOLECULAR COMPOUNDS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING POLISHES THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF MATERIALS THEREFOR WOODSTAINS WORKING-UP
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Zusammenfassung:	DISCLOSED IS A NOVEL INTEGRATED PROCESS FOR PRODUCTION OF CYCLIC ESTERS WHICH INCLUDES RECOVERY OF STARTING MATERIALS, SUCH AS LACTIC ACID FROM A DILUTE AQUEOUS LACTIC ACID-CONTAINING SOLUTION, BY SOLVENT EXTRACTION. THE STARTING MATERIALS ARE THEN FORMED INTO CYCLIC ESTERS BY REMOVAL OF WATER WHEREIN THE CONCENTRATION OF HIGHER MOLECULAR WEIGHTOLIGOMERS IS MAINTAINED BELOW ABOUT 20 WT OF THE REACTION COMPOSITION. THE PROCESS FURTHER INCLUDES PROVIDING A RECOVERY SOLVENT FOR THE REACTION COMPOSITION AND SEPARATING THE CYCLIC ESTERS FROM THE STARTING MATERIALS AND HIGHER MOLECULAR WEIGHT OLIGOMERS BY LIQUID-LIQUID EQUILIBRIUM SEPARATION. THE PRESENT INVENTION IS FURTHER DIRECTED TOWARD INDEPENDENT NOVEL UNIT OPERATIONS OF THE OVERALL PROCESS. THE PRESENT INVENTION PROVIDES FOR THE EFFICIENT PRODUCTION AND RECOVERY OF CYCLIC ESTERS DUE TO INTEGRATION OF THE VARIOUS UNIT OPERATIONS BY USE OF APPROPRIATE SOLVENTS AND RECYCLE STREAMS. IN ADDITION, HIGH RATES OF CONVERSION OF STARTING MATERIALS AND HIGH RATES OF SELECTIVE PRODUCTION OF CYCLIC ESTERS ARE ACHIEVED BY APPROPRIATE CONTROL OF PROCESS PARAMETERS.FIGURE 4