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Purification of furfuryl alcoholderived levulinic esters

  • US 3,358,014 A
  • Filed: 02/03/1964
  • Issued: 12/12/1967
  • Est. Priority Date: 02/03/1964
  • Status: Expired due to Term
First Claim
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1. A PROCESS FOR PRODUCING COLOR-STABLE LEVULINIC ESTERS FROM COLOR-UNSTABLE FURFURYL ALCOHOL-DERUVED KEVYKUBUC ESTERS WHICH ARE PRODUCED BY ACID CATALYZED REACTION BETWEEN FURFURYL ALCOHOL AND A DIFFERENT ALCOHOL WHICH CONTAINS 1 TO 10 CARBONS AND IS SELECTED FROM THE GROUP CONSISTING OF UNSUBSTITUTED PRIMARY OR SECONDARY CARBON CHAIN OR OXYGEN-CARBON CHAIN ALIPHATIC ALCOHOLS, CARBON RING OR OXYGEN-CARBON RING CYCLO-ALIPHATIC ALCHOLS COMPRISING HEATING SAID COLOR-UNSTABLE ESTER AT A TEMPERATURE ABOVE 75*C. FOR A PERIOD OF TIME GREATER THAN ONE-HALF HOUR, IN THE PRESENCE OF SULFURIC ACID IN AN AMOUNT GREATER THAN 0.2 PERCENT BASED ON THE WEIGHT OF THE ESTER, AND THEREAFTER DISTILIING COLOR-STABLE ESTER FROM THE RESULTING MIXTURE.

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