PRODUCTION OF ESTERS OF FATTY ACIDS AND LOWER ALCOHOLS
First Claim
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1. A process for the production of esters of fatty acids and C1-C5 alkyl alcohols comprising the steps of:
- (a) obtaining a fatty feed comprising a triglyceride oil or fat, partial glycerides and/or free fatty acids, (b) neutralising said fatty feed by vacuum stripping at a temperature from 200°
C. to 280°
C., thus providing a vapour stream and a residue, (c) collecting a distillate by scrubbing said vapour stream, (d) transesterifying said residue with a C1-C5 alkyl alcohol while using an alkaline catalyst, (e) separating the transesterification reaction mixture from step (d) into a fraction comprising C1-C5 alkyl esters of fatty acids and an alcoholic fraction, wherein at least part of free acids obtained in step (a) and/or (c) and/or (e) are esterifyed with an alcohol using an acid catalyst, the product of this esterification being added to said fatty feed or said residue.
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Abstract
Process for the production of esters of fatty acids and C1-C5 alkyl alcohols comprising the steps of: (a) providing a fatty feed comprising a triglyceride oil or fat, partial glycerides and/or free fatty acids, (b) neutralising said fatty feed by vacuum stripping at a temperature from 200° C. to 280° C., thus providing a vapour stream and a residue, (c) collecting a distillate by scrubbing said vapour stream,
- (d) transesterifying said residue with a C1-C5 alkyl alcohol while using an alkaline catalyst,
- (e) separating the transesterification reaction mixture from step (d) into a fraction comprising C1-C5 alkyl esters of fatty acids and an alcoholic fraction (a) wherein at least part of free acids obtained as side products in step (a) and/or (c) and/or (e) are esterifyed with an alcohol using an acid catalyst, the product of this esterification being added to said fatty feed or said residue.
53 Citations
20 Claims
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1. A process for the production of esters of fatty acids and C1-C5 alkyl alcohols comprising the steps of:
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(a) obtaining a fatty feed comprising a triglyceride oil or fat, partial glycerides and/or free fatty acids, (b) neutralising said fatty feed by vacuum stripping at a temperature from 200°
C. to 280°
C., thus providing a vapour stream and a residue,(c) collecting a distillate by scrubbing said vapour stream, (d) transesterifying said residue with a C1-C5 alkyl alcohol while using an alkaline catalyst, (e) separating the transesterification reaction mixture from step (d) into a fraction comprising C1-C5 alkyl esters of fatty acids and an alcoholic fraction, wherein at least part of free acids obtained in step (a) and/or (c) and/or (e) are esterifyed with an alcohol using an acid catalyst, the product of this esterification being added to said fatty feed or said residue. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 19)
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18. A process for the production of esters of fatty acids and C1-C5 alkyl alcohols comprising the steps of:
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(i) neutralising a fatty feed comprising a triglyceride oil or fat, partial glycerides and/or free fatty acids by vacuum stripping at a temperature from 200°
C. to 280°
C., thus providing a vapour stream and a residue,(ii) collecting a distillate by scrubbing said vapour stream, (iii) transesterifying said residue with a C1-C5 alkyl alcohol while using an alkaline catalyst, (iii) separating the transesterification reaction mixture from step (iii) into a fraction comprising C1-C5 alkyl esters of fatty acids and an alcoholic fraction.
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20. Process equipment for the production of esters of fatty acids and C1-C5 alkyl alcohols comprising:
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(a) Means for neutralising a fatty feed comprising a triglyceride oil or fat, partial glycerides and/or free fatty acids by vacuum stripping at a temperature from 200°
C. to 280°
C., thus providing a vapour stream and a residue,(b) Means for collecting a distillate by scrubbing said vapour stream, (c) Means for transesterifying said residue with a C1-C5 alkyl alcohol while using an alkaline catalyst, and (e) Means for separating the transesterification reaction mixture into a fraction comprising C1-C5 alkyl esters of fatty acids and an alcoholic fraction, wherein said means for separating the transesterification mixture operates by gravity.
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Specification