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

• Current Assignee: QO Chemicals Incorporated Chicago Illinois
• Original Assignee: Andrew P. Dunlop, George W. Huffman
• Inventors: Dunlop, Andrew P., Huffman, George W.
• Application Number:
  US04/342,253
• Time in Patent Office: 1,408 Days
• US Class Current: 560/174
• CPC Class Codes: C07C 67/00 Preparation of carboxylic acid esters
• CPC Class Codes: C07C 67/60 by treatment giving rise to chemical modification by chemisorption C07C67/56
• CPC Class Codes: C07C 69/716 Esters of keto-carboxylic acids or aldehydo-carboxylic acids

Claims

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.