EP0041002A2 - Verfahren zur Behandlung von Pflanzenölen zur Verbesserung ihrer Stabilität in der Kälte - Google Patents
Verfahren zur Behandlung von Pflanzenölen zur Verbesserung ihrer Stabilität in der Kälte Download PDFInfo
- Publication number
- EP0041002A2 EP0041002A2 EP81400750A EP81400750A EP0041002A2 EP 0041002 A2 EP0041002 A2 EP 0041002A2 EP 81400750 A EP81400750 A EP 81400750A EP 81400750 A EP81400750 A EP 81400750A EP 0041002 A2 EP0041002 A2 EP 0041002A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- oil
- treated
- container
- crystals
- ppm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 34
- 235000015112 vegetable and seed oil Nutrition 0.000 title claims abstract description 5
- 239000008158 vegetable oil Substances 0.000 title claims abstract description 5
- 239000003921 oil Substances 0.000 claims abstract description 79
- 235000019198 oils Nutrition 0.000 claims abstract description 77
- 239000013078 crystal Substances 0.000 claims abstract description 20
- 150000001875 compounds Chemical class 0.000 claims abstract description 10
- 239000006260 foam Substances 0.000 claims abstract description 9
- 238000010908 decantation Methods 0.000 claims abstract description 7
- 238000002425 crystallisation Methods 0.000 claims abstract description 4
- 230000008025 crystallization Effects 0.000 claims abstract description 4
- 239000001993 wax Substances 0.000 claims description 20
- 230000007935 neutral effect Effects 0.000 claims description 8
- 239000000344 soap Substances 0.000 claims description 6
- 239000002671 adjuvant Substances 0.000 claims description 4
- 238000001556 precipitation Methods 0.000 claims description 3
- 238000012958 reprocessing Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 abstract description 10
- 239000011261 inert gas Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 238000001914 filtration Methods 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 235000019486 Sunflower oil Nutrition 0.000 description 4
- 238000005352 clarification Methods 0.000 description 4
- 238000007670 refining Methods 0.000 description 4
- 239000002600 sunflower oil Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000005119 centrifugation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000035800 maturation Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 235000005687 corn oil Nutrition 0.000 description 2
- 239000002285 corn oil Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000008157 edible vegetable oil Substances 0.000 description 2
- 125000005456 glyceride group Chemical group 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 239000000080 wetting agent Substances 0.000 description 2
- 229920000715 Mucilage Polymers 0.000 description 1
- 235000019483 Peanut oil Nutrition 0.000 description 1
- 241000209504 Poaceae Species 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000004332 deodorization Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003925 fat Substances 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- -1 for example Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 239000000312 peanut oil Substances 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B7/00—Separation of mixtures of fats or fatty oils into their constituents, e.g. saturated oils from unsaturated oils
- C11B7/0075—Separation of mixtures of fats or fatty oils into their constituents, e.g. saturated oils from unsaturated oils by differences of melting or solidifying points
Definitions
- the subject of the present invention is a process for treating vegetable oils for improving their cold stability. This process makes it possible to clarify (for example by dewaxing, wintering) oils and in particular edible oils, such as for example, sunflower oil, corn oil, or peanut oil.
- the oil is cooled for a few hours to an appropriate temperature, making it possible to obtain crystals which can be separated by filtration.
- An adjuvant is often used filtration (for example filtering earth).
- the second method mentioned requires the use of a large quantity of wetting agent solution (5 to 10%) and the use of an expensive separation material and requiring high maintenance costs.
- the object of the present invention is to overcome these drawbacks by proposing a process making it possible to obtain clear oils even from oils having high levels of constituents with a high melting point (waxes, partial glycerides, etc.) without the use of filtration and centrifugation soils.
- This process is characterized in that, in a first step, the oil to be treated is cooled to a chosen temperature so as to allow the crystallization of the compounds to be eliminated, then in a second step, the oil thus treated is brought into a decanting container and subjected to the action of fine bubbles of a neutral gas which binds to these crystallized compounds so as to produce a foam with a density lower than that of oil.
- the gas-bubble crystal complex formed rises to the surface of the container, thus making it possible to obtain, at the bottom of the latter, after decantation, a clarified oil having a content of less than 30 ppm of crystals and with a yield greater than 90 %.
- the performance of such a process essentially depends on the formation of crystals of an appropriate size, a sufficient quantity of fine gas bubbles, in the liquid, and on the adhesion of the bubbles to the solid particles.
- a small amount of clarification aid is added to the oil to be treated, making it possible to reduce the affinity of the crystals with respect to the oily phase.
- the oil to be treated is a neutralized oil containing know, the latter fulfilling the function of clarifying adjuvants.
- the presence of water and active tension (soaps) promotes the adhesion of waxes to air bubbles.
- the gas-oil contact under pressure is carried out with stirring for a period of approximately 30 min.
- the method comprises a step of reprocessing the waxes making it possible to recover the oils which are contained therein.
- the oil to be treated is brought according to arrow A in a cooler 1 comprising an agitator 2.
- the oil to be treated is brought to the appropriate temperature, chosen according to the type of oil to be treated .
- the oil is then brought to a ripener 3 where it is kept at the same temperature so as to allow quantitative crystallization of the compounds to be removed, under conditions appropriate according to the type of oil.
- the oil is also subjected to agitation by means of an agitator 4.
- the oil is brought along arrow D to the lower part of a decantation container 5 and, it is subjected to the action of fine bubbles of a neutral gas, which attach to the crystals to eliminate so as to produce a gas-crystal complex in the form of a foam with a density lower than that of oil.
- This complex collects in zone 6 of the container, where it is removed by scraping according to arrow C.
- the production of fine bubbles of neutral gas is obtained by taking a fraction E of clarified oil which is brought into a saturator 8, where it is subjected to the action of a neutral gas such as air or nitrogen arriving according to arrow F under a pressure between 4 and 10 bars, before being expanded to atmospheric pressure, the duration of the gas-oil contact in the saturator 8 being approximately equal to 30 min.
- a neutral gas such as air or nitrogen arriving according to arrow F under a pressure between 4 and 10 bars
- a clarified oil G is recovered, a fraction E of which is recycled to the saturator 8.
- the flow rate of this fraction can range up to 300% of the flow rate of the oil to be treated leaving the ripener 3.
- This oil enriched in waxes can be treated by the method according to the invention or by usual methods (decantation, centrifugation, filtration).
- the starting raw material is a sunflower oil containing 800 ppm of waxes.
- This oil which has been subjected beforehand to neutralization and contains 0.4% of water and 1080-ppm of sodium hydroxide soap, it is introduced into a 5-liter beaker, equipped with an agitator. , all placed in a refrigerated enclosure at 5 ° C for a period of approximately 10 hours with continuous stirring.
- This oil is transferred to a saturator of 4 liters equipped with an agitator. The saturator is subjected to a pressure of 10 bars.
- the contacting time is 30 min with permanent stirring, the oil temperature being maintained at 5 ° C. by a coil located inside the reactor. At the end of this operation, the oil is expanded to atmospheric pressure by direct transfer to a 4-liter beaker. After one hour of decantation at + 5 ° C, a separation of two phases is obtained. At the bottom of the container, approximately 2,850 g of the dewaxed oil are recovered, which now contains only 20 ppm of waxes and 0.1% of water. At the top of the container, about 150 g of foam is recovered, consisting of a wax-fine gas bubble complex.
- the dewaxed oil can either be subjected to the following stages of refining, or subjected to a new treatment cycle in order to perfect the dewaxing process.
- the starting raw material is a sunflower oil containing 85 ppm of waxes. We take 3 kg of this oil previously neutralized and containing 0.3% water and 1400 ppm of sodium soap. By applying the method of Example 1, a dewaxed oil is obtained containing 7 ppm of waxes, 0.05% water and 52 ppm of soap. The yield of dewaxed oil is 98.4%.
- the starting oil is a new sunflower oil marked and discolored, containing 700 ppm of waxes, less than 0.05% water and less than 2 ppm of sodium.
- the procedure is the same as in Example 1.
- a dewaxed oil is obtained containing about 60 ppm of residual waxes with a yield greater than 93% of dewaxed oil.
- the starting oil is a crude corn oil containing 150 ppm of waxes.
- the procedure is as indicated in Example 1.
- a dewaxed oil is obtained containing 50 ppm of residual waxes and from which the suspended matters such as mucilages, solid particles, etc. are at the same time partially removed.
- the yield of dewaxed oil after clarification is therefore 95% and can range up to approximately 98.5%.
- oils obtained in Examples 1 to 5 are subjected to conventional refining operations as the case may be, up to the stage before deodorization.
- the samples thus obtained are stored at + 5 ° C for 24 hours or more.
- An oil containing 1% of waxes from dewaxing foams obtained by the process according to the invention is cooled to 25-30 ° C overnight and then centrifuged.
- the heavy phase containing the waxes represents 12% of the oil thus treated.
- the light fraction represents approximately 88% partially dewaxed oil at 400 ppm of waxes, which can be recycled as a mixture with the oil to be treated.
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Fats And Perfumes (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT81400750T ATE7306T1 (de) | 1980-05-22 | 1981-05-12 | Verfahren zur behandlung von pflanzenoelen zur verbesserung ihrer stabilitaet in der kaelte. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8011450 | 1980-05-22 | ||
FR8011450A FR2482976A1 (fr) | 1980-05-22 | 1980-05-22 | Procede de traitement des huiles vegetales pour l'amelioration de leur stabilite a froid |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0041002A2 true EP0041002A2 (de) | 1981-12-02 |
EP0041002A3 EP0041002A3 (en) | 1981-12-09 |
EP0041002B1 EP0041002B1 (de) | 1984-05-02 |
Family
ID=9242239
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP81400750A Expired EP0041002B1 (de) | 1980-05-22 | 1981-05-12 | Verfahren zur Behandlung von Pflanzenölen zur Verbesserung ihrer Stabilität in der Kälte |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0041002B1 (de) |
AR (1) | AR223283A1 (de) |
AT (1) | ATE7306T1 (de) |
CA (1) | CA1160643A (de) |
DE (1) | DE3163364D1 (de) |
ES (1) | ES8206617A1 (de) |
FR (1) | FR2482976A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2683225A1 (fr) * | 1991-10-31 | 1993-05-07 | Gattefosse Ets Sa | Procede pour ameliorer une huile glycerolysee. |
US10349941B2 (en) | 2015-05-27 | 2019-07-16 | Covidien Lp | Multi-fire lead screw stapling device |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB962814A (en) * | 1959-10-12 | 1964-07-01 | Procter & Gamble Ltd | Winterizing hardened soyabean oils |
GB1120456A (en) * | 1964-12-14 | 1968-07-17 | Ranchers Cotton Oil | Method of separating components of oleaginous mixtures by fractional crystallization |
-
1980
- 1980-05-22 FR FR8011450A patent/FR2482976A1/fr active Granted
-
1981
- 1981-05-12 EP EP81400750A patent/EP0041002B1/de not_active Expired
- 1981-05-12 DE DE8181400750T patent/DE3163364D1/de not_active Expired
- 1981-05-12 AT AT81400750T patent/ATE7306T1/de not_active IP Right Cessation
- 1981-05-19 ES ES502324A patent/ES8206617A1/es not_active Expired
- 1981-05-21 AR AR285407A patent/AR223283A1/es active
- 1981-05-21 CA CA000377981A patent/CA1160643A/fr not_active Expired
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB962814A (en) * | 1959-10-12 | 1964-07-01 | Procter & Gamble Ltd | Winterizing hardened soyabean oils |
GB1120456A (en) * | 1964-12-14 | 1968-07-17 | Ranchers Cotton Oil | Method of separating components of oleaginous mixtures by fractional crystallization |
Non-Patent Citations (1)
Title |
---|
Guide de la séparation liquide-solide (P.Rivet), pub. 1981 ed. IDEXPO, Cachan, France Perry's Chemical Engineers' Handbook, 5e ed., McGraw-Hill Book Co. 1973 * |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2683225A1 (fr) * | 1991-10-31 | 1993-05-07 | Gattefosse Ets Sa | Procede pour ameliorer une huile glycerolysee. |
WO1993009211A1 (fr) * | 1991-10-31 | 1993-05-13 | Gattefosse S.A. | Procede pour ameliorer une huile glycerolysee |
US5441738A (en) * | 1991-10-31 | 1995-08-15 | Gattefosse Sa | Process for improving a glycerolysed oil |
US10349941B2 (en) | 2015-05-27 | 2019-07-16 | Covidien Lp | Multi-fire lead screw stapling device |
US11510674B2 (en) | 2015-05-27 | 2022-11-29 | Covidien Lp | Multi-fire lead screw stapling device |
Also Published As
Publication number | Publication date |
---|---|
ES502324A0 (es) | 1982-08-16 |
EP0041002A3 (en) | 1981-12-09 |
AR223283A1 (es) | 1981-07-31 |
DE3163364D1 (en) | 1984-06-07 |
ES8206617A1 (es) | 1982-08-16 |
ATE7306T1 (de) | 1984-05-15 |
EP0041002B1 (de) | 1984-05-02 |
CA1160643A (fr) | 1984-01-17 |
FR2482976A1 (fr) | 1981-11-27 |
FR2482976B1 (de) | 1985-03-22 |
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