CN1025630C - Method for the preparation of ester-exchanged oil or fat - Google Patents
Method for the preparation of ester-exchanged oil or fat Download PDFInfo
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- CN1025630C CN1025630C CN 87107927 CN87107927A CN1025630C CN 1025630 C CN1025630 C CN 1025630C CN 87107927 CN87107927 CN 87107927 CN 87107927 A CN87107927 A CN 87107927A CN 1025630 C CN1025630 C CN 1025630C
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- fat
- oil
- ester
- lipid acid
- thin film
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Abstract
The present invention relates to a method of producing ester exchanged oil or fat with high purity and good quality at high yield, which comprises the steps of ester exchange reaction and thin film evaporation then. The present invention is particularly suitable for removing free fatty acid from edible oil or fat with a high taste requirement (for example, the fat with a cocoa oil substituent); a molecular distillation method is used for effectively removing both the free fatty acid and diglyceride.
Description
The present invention has narrated the method for preparing ester-exchanged oil or fat, and in the method, oil or fat and lipid acid carry out having removed the lipid acid that is present in the reaction system effectively after the transesterify, thereby reclaim high-quality ester-exchanged oil or fat.
Transesterification reaction is to improve oil or fatty method, and by with oil or fat and a kind of specific fatty acid response, it can change liquid oils into solid fat, or changes solid fat into liquid oils.With solid fat and fatty acid response, can obtain having the another kind of fat of different qualities in addition,, also obtain above-mentioned similar product liquid oils and fatty acid response.
Oil or fat and fatty acid response can adopt following method, promptly with having 1,3-position specificity lipase.Oily or the fatty and palmitinic acid or the stearic acid that will be rich in oleic acid (on two of triglyceride level) carry out transesterify, obtain the theobroma oil surrogate, in the method, palmitinic acid or stearic usage quantity at least should with oil or fatty equivalent, promptly every mole of oil or fat are 2 moles at least, are preferably 3 to 4 moles.Through reaction, the lipid acid that this lipid acid is contained in oil or the fat (triglyceride level) replaces, and remaining is unreacted lipid acid.
Therefore, after this reaction finishes, should remove above-mentioned lipid acid, so that reclaim required oil or fatty.
For the reaction of other oil or fat and other lipid acid, also the same with above-mentioned situation.With regard to extensive employing remove or separate and the method for the lipid acid of oil or fat coexistence with regard to, have a kind of in so-called vapor distillation method.In this method, oil or fat and the mixture of lipid acid packed into to have in the container of certain throughput, is blown into steam then under high temperature and high vacuum, distills and removes lipid acid.Wherein fatty acid distillation starting point retention time to terminal should be 60 minutes at least.If under such condition, need from product of transesterification reaction, to remove lipid acid, transesterify and/or intramolecular transfer can take place between oil or fat (triglyceride level) and the lipid acid, the output of required oil or fat (triglyceride level) is reduced.Along with the rising of temperature or the prolongation of retention time, this tendency is very obvious.It also is worthless in addition lipid acid being placed the overlong time under the high temperature, because can cause decolouring like this.
Therefore, main purpose of the present invention provides and does not a kind ofly adopt conventional vapor distillation and can received method, and wherein lipid acid is separated continuously and removes effectively at short notice, and does not have pyrolytic damage, obtains high-quality ester-exchanged oil thus.
We find that after deliberation adopting thin film evaporation or molecular distillation to remove lipid acid can achieve the above object.
Based on above-mentioned discovery, now realized the present invention.Specifically, the invention provides a kind of method for preparing ester-exchanged oil or fat, this method comprises carries out transesterify with oil or fatty and lipid acid, removes the lipid acid that is present in the reaction system by thin film evaporation or molecular distillation then.
What accompanying drawing showed is for realizing the thin film evaporation unit of the present invention's use.
Can adopt known method (such as the method with lipase and base catalyst) to carry out ester exchange reaction. If but need to be with the fat of cupu oil substituent, suggestion is used has 1,3-position specificity lipase, because need 1-position or 3-position (this ester is rich in oleic acid in the 2-position) that palmitic acid and/or stearic acid are selectively introduced triglycerides here.
Thin film evaporation in this specification refers to so a kind of process, and wherein the mixture of triglycerides and aliphatic acid forms thin film at heated evaporating surface under high vacuum, and keeps per unit amount mixture that the disengagement area of non-constant width is arranged. This evaporation is very effectively and rapidly.
The device that is used for thin film evaporation of the present invention can be fixedly impeller class centrifugal film evaporator of taper, Horizontal cylinder shape is impeller class centrifugal film evaporator fixedly, vertical type cylinder shape is impeller class centrifugal film evaporator fixedly, vertical type cylinder shape scraping class centrifugal film evaporator, scraping centrifugal film evaporator and taper centrifugal film evaporator with condenser, wherein be preferably fixedly impeller class centrifugal film evaporator of vertical type cylinder shape, this thin film evaporator is grasped preferably As condition be: 200～260 ℃ of temperature, decompression 0.1～5mmHg, retention time 1～10 second.
In addition, the molecular distillation method is to carry out under the vacuum tightness higher than thin film evaporation, for example downflow system and centrifugal method.
Operational condition is as follows preferably: 260～280 ℃ of temperature, pressure 0.02～0.1mmHg, 20 minutes to the 2 hours residence time.
Shown in following example 2, the molecular distillation method can not only be removed lipid acid, formed triglyceride in the time of also removing transesterification reaction.
General deglycerizin diester is the comparison difficulty, but adopts aforesaid method deglycerizin diester effectively.
The present invention describes in detail with reference to following example.
Embodiment 1
To contain a weight rich oil acid Trisun Oil R 80 and the stearic mixture of a weight 70 ℃ of fusings down, and to the water that wherein adds 0.2～0.3%, restir it.Make this mixture by the fixedly lipase layer of temperature maintenance, make it carry out transesterification reaction at 68～69 ℃.With vertical type cylinder shape fixedly impeller class centrifugal film evaporator 1(provide by Kansai Kagaku Kikai Seisaku) reaction product is separated into oil or fat and lipid acid.Specifically, make reactor product enter column type vaporizer 1 from import 2, reaction product is landed with form of film along the inwall 3 of cylinder, the underpressure distillation reaction product, and separated component is discharged from vapour outlet 4 and liquid exit 5.Being connected rotary blade 7(is installed on the turning axle 6) on the inwall of brushing tool 8 these cylinders of shaving.
For relatively, this lipid acid is separated with conventional vapor distillation method.
The results are shown in Table 1.(table is seen the literary composition back)
Retention time because of separation of fatty acids in the inventive method is very short, even the more steam distilled method of temperature is high 20～50 ℃, do not cause the pyrolytic damage of oil or fat yet, that is to say, not at the unwanted transesterify or the intramolecular transfer of conventional vapor distillation method generation, therefore increased the output of required ester-exchanged oil fully.In addition, can decolour because of heating hardly.
In addition, because the thermo-efficiency height of thin-film evaporator has also been saved a large amount of heat energy.
To send into the centrifugal molecular distillating device by the ester-exchanged oil that example 1 same method is prepared, service temperature is 275 ℃, pressure 0.08mmHg, retention time 100 minutes.
Fatty acid content is 0.1% in the oil that obtains thus, and diglyceride content is to be 7.4% before 2.0%(handles), the stearic acid content on 2 of triglyceride level is 2.5%.
Table 1
The inventive method vapor distillation method
230 ℃ 200 ℃ of temperature
Decompression 1～2mmHg 1～2mmHg
Steam blowing does not have to be had
Fatty acid content
Before the deacidification 50% 50%
After the deacidification 1% 3%
On triglyceride level 2-position
Stearic acid content
Before the deacidification 2.3% 2.3%
After the deacidification 2.8% 6.4%
Claims (6)
1, a kind of method for preparing ester-exchanged oil or fat, this method comprise makes oil or fat and lipid acid carry out transesterify, and removes lipid acid in the reaction system through thin film evaporation or molecular distillation.
2, adopt lipase to carry out transesterification reaction according to the process of claim 1 wherein.
3, according to the process of claim 1 wherein use vertical type cylinder shape fixedly the impeller centrifugal film evaporator carry out thin film evaporation.
4, be a kind of theobroma oil surrogate according to ester-exchanged oil or the fat that the process of claim 1 wherein.
5, according to the method for claim 4, wherein be rich in oleic oil or fat have 1 by use, 3-position specificity lipase and stearic acid carry out transesterify.The lipid acid that is present in the reaction system is removed by thin film evaporation.
6, according to the method for claim 5, wherein being rich in oleic oil or fat is Trisun Oil R 80.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87107927 CN1025630C (en) | 1986-05-21 | 1987-11-20 | Method for the preparation of ester-exchanged oil or fat |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61118339A JPH0783718B2 (en) | 1986-05-21 | 1986-05-21 | Process for producing 1,3-distearo-2-olein |
| CN 87107927 CN1025630C (en) | 1986-05-21 | 1987-11-20 | Method for the preparation of ester-exchanged oil or fat |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1033191A CN1033191A (en) | 1989-05-31 |
| CN1025630C true CN1025630C (en) | 1994-08-10 |
Family
ID=25742385
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87107927 Expired - Fee Related CN1025630C (en) | 1986-05-21 | 1987-11-20 | Method for the preparation of ester-exchanged oil or fat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1025630C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013075398A1 (en) * | 2011-11-24 | 2013-05-30 | Zhang Jianchen | Anti-gravity liquid evaporator |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3457862B1 (en) * | 2016-08-17 | 2023-06-07 | Frutarom Limited | Oil blends and processes for their preparation |
-
1987
- 1987-11-20 CN CN 87107927 patent/CN1025630C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013075398A1 (en) * | 2011-11-24 | 2013-05-30 | Zhang Jianchen | Anti-gravity liquid evaporator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1033191A (en) | 1989-05-31 |
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