Preparation of esterified propoxylated glycerin by transesterification
AssigneeArco Chemical Technology, L.P.
InventorCharles F. Cooper
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Abstract
A novel method is provided for the preparation of food grade esterified propoxylated glycerin by transesterification in a solventless system by reacting at temperatures of from about 100.degree. C. to about 250.degree. C. a propoxylated glycerin having from 2 to 100 oxypropylene units per glycerin with a saturated or unsaturated C10 to C24 fatty acid ester or mixtures thereof.
Claims24
A method for preparation of an esterified propoxylated glycerin in a solventless reaction system which comprises the steps of:
- propoxylating glycerin at a temperature of from about 70.degree. to about 130.degree. with propylene oxide in the presence of an alkali metal alkoxylate catalyst in an amount of from about 0.0003 mol to about 3.3 mol of alkali metal content per 100 g glycerin employed to give a propoxylated glycerin having from 2 to 100 oxypropylene units per glycerin;
- transesterifying the propoxylated glycerin directly, without any removal of the alkali metal alkoxylate catalyst, at a temperature of from about 100.degree. C. to about 250.degree. C. with a saturated or unsaturated C10 to C24 fatty acid C1 to C4 alkyl ester or mixtures thereof to provide an esterified propoxylated glycerin product;
- and
- purifying the propoxylated glycerin product by vacuum steam stripping said product to remove any unreacted fatty acid ester and filtering to essentially remove and reduce the alkali metal content to provide a food grade esterified propoxylated glycerin.
A method for preparation of an esterified propoxylated glycerin in a solventless reaction system which comprises the steps of:
- propoxylating glycerin at a temperature of from about 70.degree. to about 130.degree. with propylene oxide in the presence of an alkali metal alkoxylate catalyst in an amount of from about 0.0003 mol to about 3.3 mol of alkali metal content per 100 g glycerin employed to give a propoxylated glycerin having from 2 to 100 oxypropylene units per glycerin;
- removing the alkali metal alkoxylate catalyst from the propoxylated glycerin;
- transesterifying the propoxylated glycerin at a temperature of from about 100.degree. C. to about 250.degree. C. with a saturated or unsaturated C10 to C24 fatty acid C1 to C4 alkyl ester or mixtures thereof in the presence of an alkali metal alkoxide catalyst having from 1 to 4 carbon atoms in the alkyl group in an amount of from about 0.0005 to about 5.5 meq/g of propoxylated glycerin to provide an esterified propoxylated glycerin product;
- and
- purifying the propoxylated glycerin product by vacuum steam stripping said product to remove any unreacted fatty acid ester and filtering to essentially remove and reduce the alkali metal alkoxide to provide a food grade esterified propoxylated glycerin.
Dependencies are inferred from the claim text.