JPS6039117B2 - Method for producing highly stable low melting point oil and fat compositions - Google Patents

Description

[Detailed description of the invention] The present invention relates to highly stable, low melting point oil and fat compositions.

In general, edible fats and oils that have a low melting point, are easy to handle, and have a good flavor are preferred for use in various oil and fat products. A major drawback is that they tend to deteriorate the quality of oil and fat products. In addition, the above-mentioned lauric oils and fats which have relatively good stability have the disadvantage that they solidify rapidly at low temperatures, impairing the appearance of the product. Therefore, there has been a need for oils and fats that do not have these drawbacks, have a low melting point, and are excellent in various stability.

Therefore, the object of the present invention is to improve oxidative stability, thermal stability,
It is an object of the present invention to provide an excellent highly stable, low melting point oil and fat composition that has excellent hydrolytic stability, a low melting point, and is easy to handle.

Here, the term "highly stable low melting point oil/fat composition" refers to an oil/fat composition having an AOM stability of 80 hours or more and an elevated melting point of 26 qo or less. In addition, the polyenic acid shown below/(SU20U3)
The value is the value obtained by dividing the weight of polyenic acid by the weight of (SU+U3) (a value indicating the level of the polyenic acid content). The method for producing the highly stable low melting point oil and fat composition of the present invention includes 9
Non-lauric natural oils or processed oils having 0% or more SU20U3 and 0.40 or less polyenic acid/(SU20U3) are selectively hydrogenated to produce S3 0-0.5%, S2E.
+SE2 0.1-5.0%, E3 0-4.0%, S
2U I. O~6.0%, SEU I. 0-15.0%
, E2U+SU20 EU240% or more, U3 15% or more (S is palmitic acid and stearic acid, E is transmonenoic acid and trans-transgenic acid, U
represent cis-monoenoic acid, cis-cisgenic acid and cis-transgenic acid, respectively; S3, S2E, SE2,
E3, S2U, SEU, E2U, SU2, EU2, U3
represents a triglyceride composed of fatty acids represented by S, E, and U above.

), and polyenic acid (unsaturated fatty acids higher than genic acid) accounts for 8% of the total fatty acid composition.
It is characterized by obtaining the following oil and fat compositions. The oil and fat composition of the present invention has the above-mentioned glyceride composition, but more preferably S30 to 0.3%, S2E
10 SE2 0.1-2.5%, E3 0-2.5%, S
2U I. 0-5.0%, E2U10SU20EU2 4
It is preferable to have a triglyceride composition of 5% or more (E3, SEU, and U3 are the same as above).

The oil and fat composition of the present invention having the above-mentioned triglyceride composition may contain non-lauric natural oils and fats (peanut oil, rapeseed oil, hentai oil, high olefin flower oil, olive oil, etc.) or these processed oils and fats (such as transesterification, fractionation, etc.). It can be produced by hydrogenating and/or fractionating oils and fats that have passed through the process under appropriate conditions.

The raw material oil used in the method for producing the oil and fat composition of the present invention contains 90% or more (more preferably 92% or more) of S.
U20U3 and 0.40 or less (more preferably 0.3
It is a non-lauric natural oil or processed oil having a polyenic acid/(SU2+) of 2 or less).

The oil and fat composition of the present invention can be obtained by selectively hydrogenating a non-lauric oil and fat having a high self-composition under conditions that relatively suppress trans isomerization until the polyenic acid content becomes 8% or less. can. Hydrogenation under conditions suppressing trans isomerization means hydrogenation rate ratios of 25 and 30 or more for genomonene and triene/monoene, respectively (SU20U
3 is 92% or more and polyenic acid/(SU2 Jubutsu) is 0.3
2 or less, 15 and 30 or more, respectively), and △T/△IV (% of trans isomer production when the iodine value decreases by 1) is 1.0 or less (SU2 ratio is 92%).
In the above, hydrogenation of polyenic acid/(SU20U3) of 0.32 or less is hydrogenation of 2.0 or less), and under these conditions, the reduced nickel catalyst is added to the raw material oil or fat from 0.01 to 0. ．．
6% (SU20U3 is 92% or more and polyphosphoric acid/(SU
20U3) is 0.32 or less, 0.01 to 0.3%
) added, temperature 140~200oo, hydrogen pressure 0~10
This can be achieved by performing a reaction with k9/G (0 to 20 k9/c Tiger G). The effects of the present invention are that by performing selective hydrogenation using specific raw material fats and oils, it is easy to produce excellent oil and fat compositions that have excellent oxidation stability, thermal stability, and hydrolyzability, have a low melting point, and are easy to handle. The reason is that it was provided to

The oil and fat composition of the present invention can be widely used in food processing oils and fats such as margarine and shortening.

The present invention will be explained below with reference to Examples. Example 1 High oleic safflower oil (iodine value = 94.7,
SU20U3=Satoshi 3%, polyenic acid/(SU20U3)
= 0.19) 500 ml was placed in a four-necked round bottom flask, and a reduced nickel catalyst (nickel content 20%) was added to the oil to 0.
．． Hydrogenation was carried out at normal pressure at a temperature of 18,000 and a hydrogen flow rate of 0.8 so/min, stopping at an iodine value of 81.6, decatalyzing and deodorizing by a conventional method, and adding 150 ppm of natural tocopherol to determine fatty acid composition and triglyceride. Composition, melting point, AOM
Stability was measured.

(See Table-1) Example 2 White rapeseed oil (iodine value = 112.3, SU20U3 =
96.3%, polyenic acid/(SU20 ratio) = 0.29)
was hydrogenated in the same manner as in Example 1, stopped at an iodine value of 82.1, decatalyzed and deodorized from above, added 15 pm of natural tocopherol, and measured the melting point, etc. in the same manner as in Example 1. Ta.

(See Table-1) Comparative Example 1 Soybean oil (Iodine value = 130.1, S + U3 = 93.9
%, polyenic acid/(SU20U3)=0.63)500
In the evening, take an autoclave, add 0.3% of the same catalyst used in Example 1 to the oil, and perform pressure hydrogenation at a temperature of 20,000 and a hydrogen pressure of 2k9/Funa G to obtain an iodine value of 74.
6, the mixture was decatalyzed and deodorized by conventional methods, 150 ppm of natural tocopherol was added, and the melting point and other properties were measured in the same manner as in Example 1.

(See Table 1) Comparative Example 2 The same soybean oil as in Comparative Example 1 was hydrogenated in the same manner, and the iodine value was 96.
3, the same post-treatment as in Comparative Example 1 was carried out, 20 pm of natural tocopherol was added, and the melting point etc. were measured in the same manner as in Example 1.

(See Table-1) Comparative example 3 Cottonseed white squeezed oil (iodine value = 110.1, SU20U3 = 8
3.7%, polyenic acid/(SU20U3)=0.68)
was hydrogenated in the same manner as in Example 1, stopped at an iodine value of 61.1, and decatalyzed and deodorized by conventional methods to obtain natural tocopherol 1.
After adding 50 ppm, the melting point and other properties were measured in the same machine as in Example 1.

(Refer to Table 1) In addition, the triglyceride composition shown in Table 1 below is analyzed by measuring the fatty acid composition at the 1st, 3rd and 2nd positions by lipase decomposition, and calculating the 1, 3-random - 2-random distribution. Yes.

Table-1

Claims (1)

[Claims] 1. It has (SU_2+U_3) of 90% or more (based on weight, all percentages below are based on weight), and the polyenoic acid content is the value obtained by dividing the weight of the polyenoic acid by the weight of (SU_2+U_3). S_30~0.5% by selectively hydrogenating non-lauric natural oil or processed oil in an amount of 0.4 or less,
S_2E+SE_20.1-5.0%, E_30-4.
0%, S_2U1.0-6.0%, SEU1.0-15
．． 0%, E_2U+SU_2+EU_240% or more, U
_315% or more (However, S represents palmitic acid and stearic acid, E represents trans monoenoic acid and trans-trans dienoic acid, U represents cis monoenoic acid, cis-cis dienoic acid, and cis-trans dienoic acid, respectively, S_3, S
_2E, SE_2, E_3, S_2U, SEU, E_2
U, SU_2, EU_2, and U_3 represent triglycerides composed of fatty acids represented by S, E, and U above. ), and polyenoic acid (unsaturated fatty acid higher than dienoic acid) accounts for 8% of the total fatty acid composition.
A method for producing a highly stable, low melting point oil and fat composition, which is characterized by obtaining an oil and fat composition as follows.