WO2012177116A2

WO2012177116A2 - A method to produce an oil composition

Info

Publication number: WO2012177116A2
Application number: PCT/MY2012/000137
Authority: WO
Inventors: Yuen May Choo; Lik Nang Harrison LAU; Nur Sulihatimarsyila ABD. WAFTI; Nabilah KAMALIAH
Original assignee: Malaysian Palm Oil Board
Priority date: 2011-06-22
Filing date: 2012-06-22
Publication date: 2012-12-27
Also published as: CO6940402A2; WO2012177116A3; JP2014520193A; KR20140041776A; MY173752A; JP6179901B2

Abstract

A method to produce an oil composition wherein the method includes refining palm oil and unsaturated oil separately, blending the palm oil with the unsaturated oil, heating the blended oil, subjecting the heated blended oil to fractionation to form liquid oil, cooling the liquid oil with constant stirring to form crystallized oil and conducting filtration to remove the crystallized oil from filtrate liquid oil. A method to produce an oil composition wherein the method includes blending palm oil with unsaturated oil, heating the blended oil, subjecting the heated blended oil to fractionation to form liquid oil, cooling the liquid oil with constant stirring to form crystallized oil, conducting filtration to remove the crystallized oil from filtrate liquid oil and refining the crystallized and the liquid oil. Most illustrative drawing: FIG.1

Description

A METHOD TO PRODUCE AN OIL COMPOSITION

FIELD OF INVENTION

The present invention relates to a method to produce an oil composition.

BACKGROUND OF INVENTION

Phytonutrients are chemicals in plants other than vitamins and minerals that provide extra health benefits for the body. There are several classes of phytonutrients, including the major ones such as carotenoids and tocotrienois. Phytonutrients play a role in disease prevention, acting as antioxidants, immunomodulators and anti-inflammatory, anti-aging and cancer- fighting agents.

Natural phytonutrients are components such as tocopherol, palm tocotrienois, pro-vitamin A (carotenes), sterols, squalene and others. In the recent years, the demand of premium oil products has soared due to increasing health awareness of consumers. Several conventional methods in the past have been employed to produce oil composition rich in phytonutrients which have good cold stability and to be used in temperate countries such as US, Europe, Japan and South Korea. Accordingly, a need still exists for a method to produce and oil composition which is rich in natural phytonutrients made from a blend of palm oil with other highly unsaturated vegetables oil which contains good cold stability.

SUMMARY OF INVENTION

Accordingly, the present invention relates to a method to produce an oil composition wherein the method includes refining palm oil and unsaturated oil separately, blending the palm oil with the unsaturated oil, heating the blended oil, subjecting the heated blended oil to fractionation to form liquid oil, cooling the liquid oil with constant stirring to form crystallized oil and conducting filtration to remove the crystallized oil from filtrate liquid oil.

Further, the present invention also provides a method to produce an oil composition wherein the method includes blending palm oil with unsaturated oil, heating the blended oil, subjecting the heated blended oil to fractionation to form liquid oil, cooling the liquid oil with constant stirring to form crystallized oil, conducting filtration to remove the crystallized oil from filtrate liquid oil and refining the crystallized and the liquid oil.

BRIEF DESCRIPTION OF DRAWINGS

The drawings constitute part of this specification and include an exemplary or preferred embodiment of the invention, which may be embodied in various forms. It should be understood, however, the disclosed preferred embodiments are merely exemplary of the invention. Therefore, the figures disclosed herein are not to be interpreted as limiting, but merely as the basis for the claim and for teaching one skilled in the art of the invention.

In the appended drawings:

FIG.1 illustrates a method of preparing an oil composition wherein feed oil is refined. FIG.2 illustrates a method of preparing an oil composition wherein filtrate and solid fraction are refined.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

Detailed descriptions of preferred embodiments of the present invention are disclosed herein. It should be understood, however, that the embodiments are merely exemplary of the present invention, which may be embodied in various forms. Therefore, the details disclosed herein are not to be interpreted as limiting, but merely as the basis for the claim and for teaching one skilled in the art of the invention.

The present invention provides a method for producing an oil composition containing desired fatty acids content and rich in natural phytonutrients for use in food preparation for consumption, especially in cooking, frying, salad dressing, among others.

Firstly, refining of feed oils is conducted (as shown in FIG.1 ). The feed oils are namely palm oil and other unsaturated oil. Next, palm oil containing carotenes and other phytonutrients is blended with other unsaturated oil such as soybean oil and canola oil with a blending ratio ranging from 9:1 to 1 :2 preferably at ratio 6:4. The blended oil is then heated at temperature ranging from 40 °C to 50 °C to ensure all crystals are destroyed before crystallization is introduced.

The blended oil is then subjected to fractionation process in order to produce a liquid fraction with higher unsaturated fatty acids content to achieve better cold stability (below 6°C). The unsaturated fatty acids from the unsaturated oil can enhance the unsaturated fatty acids to retain in liquid phase during the fractionation process. With this, the yield of the process can also be improved with more liquid oil being produced. The blending ratio of the oil should match with the melting point and the crystallisation behaviour of the mixture.

Next, a cooling process is then initiated in the crystallizer that equipped with stirrers. The stirrer should be able to continuously stir at a constant speed along the process to coagulation of crystal formed. The constant stirrer speed is desired to control the formation of uniformed crystal size. The crystallization process may range from 6 to 24 hours preferably 16 hours at temperature between 40°C to -5°C depending on the blending ratio and types of feed oils. In order to achieve good cold stability of the filtrate, the preferred holding temperature before filtration of the crystallised oil should be below 18°C as only liquid oil with good cold stability that remains in liquid form can pass through the membrane. The filtration of the oil is achieved through membrane filter press of at least 400kPa to 3000kPa at cold conditions, preferably at a temperature ranging from 5°C to 15°C. Filtrate obtained from the process having high Iodine Value (IV) (at least 70) and remains liquid at cold temperature below 6°C.

The filtered oil obtained from the filtration step contains 20% to 40% of saturated fatty acids, 20% to 40% monounsaturated fatty acids and 20% to 40% polyunsaturated fatty acids. Filtrate (premium oil) remains liquid at near-zero temperature.

In the event where the feed oil is not refined prior to blending and fractionation (as shown in FIG.2), the filtrate and solid fraction shall be refined by way of degumming using phosphoric acid 0.1 % concentration, controlled bleaching using neutral or acidic bleaching earth with dosage 1 % at 95 °C temperature and neutralization. Neutralization via steam deodorization should be avoided to retain as much carotenes and vitamin E in the oil. The preferred neutralization process includes short path distillation and chemical neutralization.

The final oil obtained from the process will contain at least 300 ppm of carotene and 400 ppm of vitamin E with cloud point below 6°C.

The following examples further illustrate but by no means limit the scope of present invention: Example 1

Palm oil was obtained from local mill having properties of as Palm Oil Refiners Association of Malaysia (PORAM) standard. Palm oil is blended with soybean oil in the ration of 6:4. The oil is then heated to 60 °C and continuously stirred to ensure homogeneity. The oil is then cooled for about 6 hours at a temperature ranging from 50 "C to 14°C, before subjected to fractionation. The fraction is filtered at 18°C with oil composition as shown in TABLE 1 . The oil composition obtained from these conditions has saturated, monounsaturated and polyunsaturated fatty acids in the ratio of almost 1 :1 :1 . The cloud point of the filtrate is 5°C. The carotenes and vitamin E contents in the filtrate are 432ppm and 714ppm respectively.

TABLE 1

Example 2 The method as described in Example 1 was repeated with another batch of palm oil blended with soybean oil in the ratio of 5:5. The results obtained are shown in TABLE 2. The cloud point obtained for the filtrate is 5°C. The carotenes and vitamin E contents in the filtrate are 315ppm and 967ppm respectively.

TABLE 2

Example 3

The method as described in Example 1 was repeated with another batch of palm oil blended with soybean oil where the crystallization period is about 8 hours in the ratio of 8:2. The fraction is filtered at 14°C with oil composition as shown in TABLE 3. The cloud point for the filtrate is 6°C. The carotenes and vitamin E contents in the filtrate are 253ppm and 938ppm respectively.

TABLE 3

Example 4

The method as described in Example 1 was repeated with another batch of palm oil blended with canola oil where the crystallization period is about 8 hours in the ratio of 8:2. The fraction is filtered at 14°C with oil composition as shown in TABLE 4. The cloud point for the filtrate is 5°C. The carotenes and vitamin E contents in the filtrate are 417ppm and 624ppm respectively.

TABLE 4

CPO:CAO C12:0 C14:0 C16:0 C18:0 C18:1 C18:2 C18:3 . sat mono poly , IV

Feed 0.20 0.79 34.77 4.14 42.94 14.09 2.81 0.9 1.0 0.4 68.82

Filtrate 0.20 0.71 30.1 1 4.03 44.78 16.97 3.08 0.8 1.0 0.4 75.80 Example 5

The method as described in Example 1 was repeated with another batch of palm oil blended with canola oil in the ratio of 6:4. The blended oil is cooled for about 16 hours with final oil at a temperature of 3°C. The results obtained are shown in TABLE 5. The cloud point for the filtrate is 6°C. The carotenes and vitamin E contents in the filtrate are 356ppm and 690ppm respectively.

TABLE 5

Example 6

The method as described in Example 1 was repeated with another batch of palm oil blended with canola oil with ratio 5:5. The results obtained are shown in Table 6. The cloud point for the filtrate is 5°C. The carotenes and vitamin E contents in the filtrate are 299ppm and 578ppm respectively.

TABLE 6

While embodiments and examples of the present invention have been illustrated and described, it is not intended that these embodiments and examples illustrate and describe all possible forms of the present invention. Rather, words used in the specification are words of description rather than limitation and various changes may be made without departing from the scope of the invention.

Claims

CLAIMS 1 . A method to produce an oil composition wherein the method includes:

1. refining palm oil and unsaturated oil separately;

ii. blending the palm oil with the unsaturated oil;

iii. heating the blended oil;

iv. subjecting the heated blended oil to fractionation to form liquid oil;

v. cooling the liquid oil with constant stirring to form crystallized oil; and

vi. conducting filtration to remove the crystallized oil from filtrate liquid oil.

2. A method as claimed in claim 1 wherein the palm oil contains carotenes or other phytonutrients or a mixture thereof.

3. A method as claimed in claim 1 wherein the unsaturated oil is soybean oil, canola oil, rapeseed oil, sunflower oil or other vegetable oil or a mixture thereof.

4. A method as claimed in claim 1 wherein step ii) is conducted at a ratio ranging from 9:1 to 1 :2.

5. A method as claimed in claim 4 wherein the ratio is 6:4.

6. A method as claimed in claim 1 wherein step iii) is conducted at a temperature ranging from 40 °C to 50 °C.

7. A method as claimed in claim 1 wherein step v) is conducted at a period between 6 to 24 hours and at a temperature ranging from 40 °C to -5°C.

8. A method as claimed in claim 1 wherein step vi) is conducted at a temperature ranging from 5°C to Ι δΌ and at a pressure ranging from 400kPa to 3000kPa.

9. An oil composition as claimed in claims 1 -8 includes:

i. at least 300ppm of carotene; and

ii. at least 400ppm of vitamin E.

10. A method to produce an oil composition wherein the method includes:

i. blending palm oil with unsaturated oil;

11. heating the blended oil;

iii. subjecting the heated blended oil to fractionation to form liquid oil;

iv. cooling the liquid oil with constant stirring to form crystallized oil;

v. conducting filtration to remove the crystallized oil from filtrate liquid oil; and vi. refining the crystallized and the liquid oil.

1 1. A method as claimed in claim 10 wherein the palm oil contains carotenes or other phytonutrients or a mixture thereof.

12. A method as claimed in claim 10 wherein the unsaturated oil is soybean oil, canola oil, rapeseed oil, sunflower oil or other vegetable oil or a mixture thereof.

13. A method as claimed in claim 10 wherein step i) is conducted at a ratio ranging from 9:1 to 1 :2.

14. A method as claimed in claim 13 wherein the ratio is 6:4.

15. A method as claimed in claim 10 wherein step ii) is conducted at a temperature ranging from 40 °C to 50 °C.

16. A method as claimed in claim 10 wherein step iv) is conducted at a period between 6 to 24 hours and at a temperature ranging from 40 °C to -5°C.

17. A method as claimed in claim 10 wherein step v) is conducted at a temperature ranging from 5°C to 15°C and at a pressure ranging from 400kPa to 3000kPa.

18. An oil composition as claimed in claims 10-17 includes:

i. at least 300ppm of carotene; and

ii. at least 400ppm of vitamin E.