Process for producing monoglycerides of fatty acids
First Claim
1. IN A RECYCLING PROCESS FOR PREPARING MONOGLYCERIDE ESTERS OF FATTY ACIDS, THE STEPS COMPRISING (A) REACTING ONE PART OF SUBSTANTIALLY ANHYDROUS GLYCEROL WITH FROM ONE TO THREE PARTS OF A POLYGLYCERIDE OF A FATTY ACID IN THE PRESENCE OF FROM 0.1% TO 2%, BASED ON THE WEIGHT OF THE GLYCEROL, OF ANHYDROUS ALKALI, THE MIXTURE BEING HEATED RAPIDLY TO A TEMPERATURE OF FROM 475*F. TO 525*F., (B) HOLDING THE MIXTURE AT THIS TEMPERATURE FOR AT LEAST 15 MINUTES TO OBTAIN A HIGH PROPORTION OF MONOGLYCERIDE, (C) ACIDIFYING THE REACTION PRODUCT TO A PH OF BELOW 7 BY ADDING AN EXCESS OF CONCENTRATED PHOSPHORIC ACID TO CONVERT THE ALKALI TO THE ALKALI METAL ACID PHOSPHATE, (D) COOLING THE REACTION MIXTURE RAPIDLY TO A TEMPERATURE OF FROM 200*F. TO 350*F. TO MINIMIZE REVERSION OF THE MONOGLYCERIDE, (E) STRIPPING FREE GLYCEROL FROM THE MIXTURE, (F) VACUUM DISTILLING THE REACTION PRODUCT WHILE ACIDIFIED TO RECOVER A HIGH PROPORTION OF THE MONOGLYCERIDE THEREFROM, WITHOUT APPRECIABLE REVERSION DURING DISTILLATION, (G) REMOVING BY MECHANICAL SEPARATIONS SUBSTANTIALLY ALL OF THE ALKALI METAL ACID PHOSPHATE SALT FROM THE RESIDUE OF THE VACUUM DISTILLATION, (H) RECYCLING THE TREATED RESIDUE TO THE REACTION STEP (A) TO BE COMBINED WITH ADDED FATTY ACID POLYGLYCERIDE AND THE WHOLE TO BE REACTED WITH ADDITIONAL GLYCEROL AND ALKALI METAL CATALYST WITH SUBSTANTIALLY EQUAL EFFICIENCY OF CONVERSION TO MONOGLYCERIDE.
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1 Claim
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1. IN A RECYCLING PROCESS FOR PREPARING MONOGLYCERIDE ESTERS OF FATTY ACIDS, THE STEPS COMPRISING (A) REACTING ONE PART OF SUBSTANTIALLY ANHYDROUS GLYCEROL WITH FROM ONE TO THREE PARTS OF A POLYGLYCERIDE OF A FATTY ACID IN THE PRESENCE OF FROM 0.1% TO 2%, BASED ON THE WEIGHT OF THE GLYCEROL, OF ANHYDROUS ALKALI, THE MIXTURE BEING HEATED RAPIDLY TO A TEMPERATURE OF FROM 475*F. TO 525*F., (B) HOLDING THE MIXTURE AT THIS TEMPERATURE FOR AT LEAST 15 MINUTES TO OBTAIN A HIGH PROPORTION OF MONOGLYCERIDE, (C) ACIDIFYING THE REACTION PRODUCT TO A PH OF BELOW 7 BY ADDING AN EXCESS OF CONCENTRATED PHOSPHORIC ACID TO CONVERT THE ALKALI TO THE ALKALI METAL ACID PHOSPHATE, (D) COOLING THE REACTION MIXTURE RAPIDLY TO A TEMPERATURE OF FROM 200*F. TO 350*F. TO MINIMIZE REVERSION OF THE MONOGLYCERIDE, (E) STRIPPING FREE GLYCEROL FROM THE MIXTURE, (F) VACUUM DISTILLING THE REACTION PRODUCT WHILE ACIDIFIED TO RECOVER A HIGH PROPORTION OF THE MONOGLYCERIDE THEREFROM, WITHOUT APPRECIABLE REVERSION DURING DISTILLATION, (G) REMOVING BY MECHANICAL SEPARATIONS SUBSTANTIALLY ALL OF THE ALKALI METAL ACID PHOSPHATE SALT FROM THE RESIDUE OF THE VACUUM DISTILLATION, (H) RECYCLING THE TREATED RESIDUE TO THE REACTION STEP (A) TO BE COMBINED WITH ADDED FATTY ACID POLYGLYCERIDE AND THE WHOLE TO BE REACTED WITH ADDITIONAL GLYCEROL AND ALKALI METAL CATALYST WITH SUBSTANTIALLY EQUAL EFFICIENCY OF CONVERSION TO MONOGLYCERIDE.
Specification
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Current AssigneeHermann Birnbaum, Joseph Lederer
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Original AssigneeHermann Birnbaum, Joseph Lederer
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InventorsHERMANN BIRNBAUM, Lederer, Joseph
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Application NumberUS04/111,183Time in Patent Office830 DaysField of SearchUS Class Current554/157CPC Class CodesC11C 3/06 with glycerol
