JP2012100649A - Method for producing cooking oil and fat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide cooking oil and fat as oil and fat to be used for cooking, such as frying oil, suppressed in the rise of acid value by heating, in view of the fact that a technology development considering the environment and allowing to reduce the amount of used waste oil by using frying oil further long is desired from the aspect of load reduction to the environment.SOLUTION: This method for producing the cooking oil and fat suppressed in the rise of acid value by heating includes mixing an aqueous solution of at least one selected from each metallic salt of sodium, potassium, magnesium and calcium, and dehydrating the mixture so as to include 0.1-1 μmol/g in the total of sodium, potassium, magnesium and calcium by determining with atomic absorption spectrophotometry.

Description

TECHNICAL FIELD The present invention relates to a method for producing cooking oils and fats in which an increase in acid value due to heating is suppressed.

Oils and fats have excellent properties as heat media, and cooking oils and fats such as frying oil and spray oil are used for cooking such as “baking”, “sautéing”, and “frying” in food cooking.

Oils and fats used for cooking by heating may be exposed to high temperatures during the heating process in food cooking, whereby the acid value may increase over time.

Therefore, in cooking oils and fats such as frying oil, there are many users who manage the degradation index of fats and oils by acid value, and in cooking frozen food manufacturers etc., the acid value of frying oil is 2.5 or less. There are some examples.

Therefore, if the increase in the acid value of the fats and oils due to heating can be suppressed, the frying oil can be used for a longer time, and the frequency of changing the frying oil can be reduced.

So far, as a method for improving the quality of cooking oils and fats, for example, Patent Document 1 discloses HLB9 for suppressing acid value increase and coloring when fried dough added with egg yolk components. An oil composition for frying containing 0.0 or more polyglycerin fatty acid ester has been proposed, but this method is a method for suppressing the deterioration of frying oil when fried dough added with egg yolk components.

Patent Document 2 proposes an oil composition for frying containing a polyglycerin fatty acid ester having a specific esterification rate and a fatty acid composition as an oil composition for frying in which deterioration after heating is suppressed. However, this uses a polyglycerin fatty acid ester having a high polymerization degree of 6 to 10 for fats and oils having specific physical properties.

Patent Document 3 proposes an oil and fat composition containing a polyglycerin fatty acid ester having an average degree of polymerization of 6 to 30 and an average degree of substitution of 4 to 32. This is to suppress foaming, This is a method for prolonging the lifetime during frying.

Furthermore, Non-Patent Document 1 describes the prevention of deterioration of safflower oil by various surfactants such as soaps, but the addition amount is considerably large, and these surfactants were added and heated. The oil is also said to be colored.

As described above, several studies have been conducted so far, but none of the methods can provide a sufficient effect of suppressing the increase in the acid value of fats and oils due to heating, and the price of various food ingredients has increased. There is also a need for a solution that can reduce the frequency of replacement by users who use frying oil.
Furthermore, from the viewpoint of reducing environmental impact, it is possible to reduce the amount of used waste oil by using frying oil for a longer time, so the development of environmentally friendly technology is desired. .

JP 2001-149010 A JP-A-9-299027 JP 2003-313583 A

Ota Shizuyuki, Yuki Shinji, “Theory and Practice of Fry Foods”, Koshobo, April 1989, p. 112

The objective of this invention is providing the fats and oils for cooking which suppressed the raise of the acid value by the heating of the fats and oils used for heat cooking uses, such as frying oil, by the simple method.

Thus, as a result of intensive studies, the present inventors have included one or more components selected from sodium, potassium, magnesium, and calcium in the fat and oil in an amount of 0.1 to 1 μmol / g, whereby the acid value of the oil and fat by heating is increased. As a result, the present inventors have found the knowledge that the increase in the temperature can be suppressed and have completed the present invention.

That is, the present invention is “1. One or more aqueous solutions selected from metal salts of sodium, potassium, magnesium or calcium and fats and oils are mixed, dehydrated, and determined by atomic absorption spectrophotometry to determine sodium, potassium, magnesium, and The manufacturing method of the fats and oils for cooking by which the acid value raise by heating was suppressed, calcium is contained 0.1-1 micromol / g in total.
2. Inhibition of increase in acid value for cooking oils and fats, characterized in that it is a water-in-oil emulsion composition containing one or more aqueous solutions selected from metal salts of sodium, potassium, magnesium, or calcium, a substrate and an emulsifier. Agent.
3. 1. One or more components selected from sodium, potassium, magnesium, or calcium metal salts are contained. "
It is.

By using the cooking oil and fat of the present invention and the acid value increase inhibitor for cooking oil and the like, the increase in the acid value of the fat due to heating can be suppressed, so the frequency of changing the frying oil is reduced and the frying time is longer. Oil can be used, leading to a reduction in the cost of using frying oil, a reduction in the amount of used waste oil, and the burden on the environment can be reduced.

Hereinafter, the present invention will be described in detail.

The cooking oil / fat of the present invention contains one or more components selected from sodium, potassium, magnesium, and calcium in the oil / fat, and specifically, the carbonate, chloride salt, organic It can be obtained by adding an acid salt or the like into the oil.

Examples of the metal salt to be used include the following, regardless of water solubility or oil solubility.
L-calcium ascorbate, sodium L-ascorbate, sodium erythorbate, sodium caseinate, monopotassium citrate and tripotassium citrate, calcium citrate, trisodium citrate, potassium L-glutamate, calcium L-glutamate, L- Sodium glutamate, magnesium L-glutamate, monosodium succinate, disodium succinate, DL-potassium hydrogen tartrate, potassium L-tartrate, DL-sodium tartrate, sodium L-tartrate, potassium carbonate, calcium carbonate, sodium bicarbonate, Sodium carbonate, magnesium carbonate, DL-sodium malate, tripotassium phosphate, tricalcium phosphate, trimagnesium phosphate, dipotassium hydrogen phosphate, potassium dihydrogen phosphate, monohydrate phosphate Calcium, calcium dihydrogen phosphate, disodium hydrogen phosphate, sodium dihydrogen phosphate, trisodium phosphate, calcium stearoyl lactate, sodium stearoyl lactate

Among these metal salts, calcium L-ascorbate, sodium L-ascorbate, sodium erythorbate, trisodium citrate, sodium L-glutamate, monosodium succinate, disodium succinate, potassium sorbate, calcium carbonate, carbonic acid The use of sodium hydrogen, sodium carbonate, magnesium carbonate is preferred.

For example, when obtaining a fat and oil containing sodium, a prescribed amount of 1% sodium carbonate aqueous solution is added to the fat and oil heated to 70 ° C, and the temperature is 50 to 180 ° C and the degree of vacuum is 0.5 to 100 Torr. 15 minutes to 1 hour By carrying out the stirring treatment, sufficient dehydration can be performed to obtain a fat containing oil. In this case, the concentration of the sodium carbonate aqueous solution can be 0.1 to 30%, and preferably 1 to 10%. If the amount is less than the lower limit, the amount of water relative to the fat increases and the efficiency becomes poor. If the upper limit is exceeded, crystals of sodium carbonate will precipitate, making it difficult to contain in oils and fats. Furthermore, as dehydrating conditions, the temperature can be 50 to 180 ° C. and the degree of vacuum can be 0.5 to 100 Torr, but it is preferably as low as possible.

The oil and fat for cooking according to the present invention contains one or more components selected from sodium, potassium, magnesium and calcium in the oil and fat. Among these, the oil and fat by heating when sodium is contained in the oil and fat. The effect of suppressing the increase in the acid value is high and preferable.

The oil and fat for cooking according to the present invention is characterized in that the total of one or more components selected from sodium, potassium, magnesium and calcium is 0.1 to 1 μmol / g, and these are contained in a small amount in the oil and fat. Thereby, the raise of the acid value of fats and oils by heating can be suppressed. When the total content of these components is too low, it may be difficult to obtain an effect of suppressing an increase in acid value due to heating. Moreover, also when there is too much content of these metals, the effect which suppresses a raise of an acid value becomes difficult to be acquired.

Moreover, this invention produces the acid value raise inhibitor for fats and oils for heating cooking which increased content of 1 or more components chosen from each metal salt of sodium, potassium, magnesium, and calcium, This acid value rise inhibitor is used. By adding a small amount to the frying oil, an increase in the acid value due to the heating of the frying oil can be suppressed.

Furthermore, the present invention is a water-in-oil emulsion composition by mixing an aqueous solution of one or more metal salts selected from sodium, potassium, magnesium, and calcium, a substrate (for example, oil such as palm olein), and an emulsifier. An acid value increase inhibitor for cooking oils and fats can be obtained, and by adding a small amount of this acid value increase inhibitor to frying oil, an increase in acid value due to heating of the frying oil can be suppressed.

For example, to 65 parts by weight of palm olein heated to 70 ° C., 5 parts by weight of polyglycerin condensed ricinoleic acid ester (PGPR) is added as a dispersion medium (emulsifier), and then 30 parts by weight of 30% by weight aqueous sodium carbonate solution may be added. It stirs and can obtain the acid value raise inhibitor for oils and fats for cooking which contains sodium carbonate 9weight%. There is no restriction | limiting in particular as polyglycerin condensed ricinoleic acid ester to be used, Commercially available emulsifiers such as Poem PR-100 and Poem PR-300 manufactured by Riken Vitamin Co., Ltd. can be used.

Moreover, the acid-value raise suppression powder formulation for fats and oils for cooking in this invention contains 1 or more metal salts chosen from sodium, potassium, magnesium, and calcium, It is characterized by the above-mentioned. This powder formulation is prepared by mixing an aqueous solution of one or more metal salts selected from sodium, potassium, magnesium, and calcium, a substrate, and an emulsifier, and drying and powdering the resulting mixture using a method known per se. There is no particular limitation. By adding this powder formulation to fats and oils, the effect of suppressing an increase in acid value can be obtained.

Moreover, the oil-fat preparation for cooking oils and fats for heating and cooking in the present invention is prepared by mixing one or more metal salts selected from sodium, potassium, magnesium and calcium, fats and oils and, if necessary, emulsifiers, and obtained mixed fats and oils. It can be obtained by pulverizing the composition by a method known per se. The oil and fat used as the powdered oil and fat preparation of the present invention is not particularly limited as long as it is an edible oil. Examples thereof include palm oil, rapeseed oil, soybean oil, sunflower oil, corn oil, cottonseed oil, safflower oil, rice bran oil, coconut oil, palm kernel oil, and the like, and hardened oils, transesterified oils, fractionated oils, and the like.
Of these fats and oils, those having a melting point of 45 to 75 ° C, more preferably 50 to 65 ° C are preferable.

As a method for preparing a powdered oil / fat preparation for heating and cooking oils, the obtained mixed oil / fat is obtained by mixing at least one metal salt selected from sodium, potassium, magnesium and calcium, an oil / fat and, if necessary, an emulsifier. Spray cooling method in which the composition is sprayed into a cooling tower (chiller) to pulverize, drum flake method in which the mixed fat composition is poured onto a cooled drum, solidified and scraped, spray drying method, etc. However, it is not particularly limited. By adding a small amount of this oil-value-increasing powder oil / fat preparation to the frying oil, an increase in the acid value due to heating of the frying oil can be suppressed.

For example, after adding 5 parts by weight of polyglycerin condensed ricinoleic acid ester (PGPR) as a dispersion medium (emulsifier) to 65 parts by weight of extremely hardened oil of refined palm oil heated to 70 ° C. and completely dissolved, 30% by weight 30 parts by weight of aqueous sodium carbonate solution was added and stirred on a cooled drum. The solidified oil was scraped and ground, passed through a 10-mesh sieve, and the acid value for cooking oil containing 9% by weight of sodium carbonate. A rise-suppressed powdered oil / fat preparation can be obtained. There is no restriction | limiting in particular as polyglycerin condensed ricinoleic acid ester to be used, Commercially available emulsifiers such as Poem PR-100 and Poem PR-300 manufactured by Riken Vitamin Co., Ltd. can be used.

The fats and oils that can be used as the cooking oils and fats of the present invention are not particularly limited, but soybean oil, rapeseed oil, safflower oil, corn oil, sunflower oil, cottonseed oil, rice oil, olive oil, palm oil, coconut oil, palm kernel oil It is possible to use edible fats and oils such as sesame oil, beef tallow, pork tallow and fish oil, and processed fats and oils subjected to separation, hydrogenation or transesterification, etc., alone or in combination.

Among the oils and fats, the present invention can be preferably applied particularly to palm oils and fats. As palm oils and fats, purified palm oils obtained by refining natural palm oil and having an iodine value of 50 or more and less than 60, solvents or non-oils. Fraction fraction obtained by fractionating with a solvent fractionation method and having an iodine value of 40 or more and less than 50, palm fraction having a low melting point, palm olein which is a low melting point fraction, and further obtained by fractionating palm olein in one or two stages. The above edible palm olein is mentioned.

The present invention can be preferably applied to edible palm olein having an iodine value of 55 or more, which is used as a general frying fat and oil that is liquid at room temperature and has good workability among the palm-based fats and oils.

Compared to conventional cooking oils and fats for cooking and cooking oils and fats of the present invention, since the increase in the acid value of the fats and oils due to heating is greatly suppressed, such as frying oil and as spray oil during oven baking cooking, It can be widely used for cooking.

In addition, the cooking oil according to the present invention may be added with edible emulsifiers such as sucrose fatty acid ester, polyglycerin fatty acid ester, sorbitan fatty acid ester, glycerin fatty acid ester, fragrance, pigment, antioxidant, silicone, etc. can do.
As the antioxidant used in combination, natural and synthesized antioxidants can be used, for example, various tocopherols, and tocopherol preparations, mixed tocopherols, or tocopherols in which α, β, γ, δ and the like are concentrated are used. Tocotrienols having an equivalent function can also be used. Vitamin C can also be used as a water-soluble antioxidant, but because it is water-soluble, it is difficult to disperse it in oils and fats, so it is desirable to use ascorbic acid palmitic acid ester modified to be oil-soluble as palmitic acid ester . In addition, the antioxidant which can be used as an antioxidant for fats and oils such as tea extract can be used without being limited to the above examples.

EXAMPLES Hereinafter, an Example is shown and this invention is demonstrated in detail.
In the following, the determination method of sodium, potassium, magnesium and calcium contents and the fly test method were carried out as follows.
(Quantitative determination of sodium, potassium, magnesium, calcium content)
Sodium, potassium, magnesium and calcium contents were quantified by atomic absorption spectrophotometry.
(Fly test method)
Weigh 2kg of cooking oil in a frying pan. Fry two frozen croquettes once every 20 minutes, keeping the oil temperature at 180 ± 5 ° C for 5 minutes and 30 seconds. This operation was repeated continuously for 12 hours, and the acid value of the frying oil after 12 hours was analyzed.
In addition, the acid value of fats and oils was measured according to the standard fat and oil analysis method (2.3.1-acid value, standard fat and oil analysis test method (I), Japan Oil Chemists 'Society established, 1996 edition, Japan Oil Chemists' Society). .
(Acid value increase suppression effect)
The acid value when a fat test that does not contain sodium, potassium, magnesium, and calcium is fly tested is A, and the acid value when a fat test that contains sodium, potassium, magnesium, and calcium is the same fat is B. (AB) / A was defined as the acid value increase inhibitory effect (%).

(Comparative Example 1)
100 ppm of mixed tocopherol was added as an antioxidant to palm olein (iodine value: 67) to obtain a fat for cooking.
The acid value analysis value after the frying test of the cooking oil / fat was 1.85.

(Comparative Example 2)
0.3 parts by weight of a 1% by weight aqueous sodium carbonate solution was added to 100 parts by weight of palm olein (iodine value: 67) heated to 70 ° C., and the mixture was stirred for 20 minutes under conditions of a temperature of 70 ° C. and a degree of vacuum of 40 Torr. Dehydration was performed to obtain an oil containing 13 ppm sodium. After dilution and concentration adjustment with palm olein (iodine number: 67), the sodium content was analyzed and found to be 1.2 ppm (0.05 μmol / g). Mix tocopherol 100 ppm was added as an antioxidant to obtain a fat for cooking.
The acid value analysis value after the frying test of this cooking oil / fat was 1.82, and the acid value increase suppressing effect compared with the cooking oil / fat of Comparative Example 1 was 1.6%.

Example 1
0.3 parts by weight of a 1% by weight aqueous sodium carbonate solution was added to 100 parts by weight of palm olein (iodine value: 67) heated to 70 ° C., and the mixture was stirred for 20 minutes under conditions of a temperature of 70 ° C. and a degree of vacuum of 40 Torr. Dehydration was performed to obtain an oil containing 13 ppm sodium. After dilution and concentration adjustment with palm olein (iodine value: 67), the sodium content was analyzed and found to be 3.2 ppm (0.14 μmol / g). Mix tocopherol 100 ppm was added as an antioxidant to obtain a fat for cooking.
The acid value analysis value after the frying test of this cooking oil / fat was 1.68, and the acid value increase inhibitory effect compared to the cooking oil / fat of Comparative Example 1 was 9.2%.

(Example 2)
0.3 parts by weight of a 1% by weight aqueous sodium carbonate solution was added to 100 parts by weight of palm olein (iodine value: 67) heated to 70 ° C., and the mixture was stirred for 20 minutes under conditions of a temperature of 70 ° C. and a degree of vacuum of 40 Torr. Dehydration was performed to obtain an oil containing 13 ppm sodium. When the sodium content was analyzed, it was 8.3 ppm (0.36 μmol / g). Mix tocopherol 100 ppm was added as an antioxidant to obtain a fat for cooking.
The acid value analysis value after the frying test of this cooking oil / fat was 1.56, and the acid value increase inhibitory effect compared with the cooking oil / fat of Comparative Example 1 was 15.7%.

(Example 3)
0.75 parts by weight of a 1% by weight sodium carbonate aqueous solution is added to 100 parts by weight of palm olein (iodine value: 67) heated to 70 ° C., and the mixture is stirred for 20 minutes under the conditions of a temperature of 70 ° C. and a degree of vacuum of 40 Torr. Dehydration was performed to obtain a fat containing 32.3 ppm sodium. When the sodium content was analyzed, it was 18.6 ppm (0.81 micromol / g). Mix tocopherol 100 ppm was added as an antioxidant to obtain a fat for cooking.
The acid value analysis value after the frying test of this cooking oil / fat was 1.64, and the acid value increase inhibitory effect compared with the cooking oil / fat of Comparative Example 1 was 11.4%.

(Comparative Example 3)
1.5 parts by weight of a 1% by weight aqueous sodium carbonate solution is added to 100 parts by weight of palm olein (iodine value: 67) heated to 70 ° C., and is stirred for 20 minutes under the conditions of a temperature of 70 ° C. and a degree of vacuum of 40 Torr. Dehydration was performed to obtain a fat containing 64.5 ppm sodium. When the sodium content was analyzed, it was 37.2 ppm (1.62 micromol / g). Mix tocopherol 100 ppm was added as an antioxidant to obtain a fat for cooking.
The acid value analysis value after the frying test of this cooking oil / fat was 1.94, and the acid value increase inhibitory effect compared with the cooking oil / fat of Comparative Example 1 was -4.9%.

The results of Comparative Examples 1 to 3 and Examples 1 to 3 are shown in Table 1.

(Comparative Example 4)
Tofu white oil (iodine value: 131) was added 100 ppm of mixed tocopherol as an antioxidant to obtain a fat for cooking.
The acid value analysis value after the frying test of the cooking oil / fat was 1.40.

Example 4
To 100 parts by weight of soybean white oil (iodine value: 131) heated to 70 ° C., 0.3 part by weight of a 1% by weight aqueous sodium carbonate solution was added and stirred at a temperature of 70 ° C. and a vacuum of 40 Torr. Dehydration was performed for 20 minutes to obtain an oil containing 13 ppm of sodium. When the sodium content was analyzed, it was 9.6 ppm (0.42 micromol / g). Mix tocopherol 100 ppm was added as an antioxidant to obtain a fat for cooking.
The acid value analysis value after the frying test of this cooking oil / fat was 1.02, and the acid value increase inhibiting effect compared with the cooking oil / fat of Comparative Example 4 was 27.1%.

(Comparative Example 5)
Heated by adding 100 ppm of mixed tocopherol and emulsifier (polyglycerin fatty acid ester) as an antioxidant to 50 parts by weight of palm olein (iodine value: 67) and 50 parts by weight of soybean white squeezed oil (iodine number: 131) A cooking oil was obtained.
The acid value analysis value after the frying test of this cooking oil / fat was 1.41.

(Example 5)
0.3 parts by weight of 1% by weight aqueous sodium carbonate solution was added to 50 parts by weight of palm olein (iodine value: 67) heated to 70 ° C and 50 parts by weight of soybean white oil (iodine number: 131). Under the conditions of a temperature of 70 ° C. and a degree of vacuum of 40 Torr, dehydration was performed for 20 minutes with stirring to obtain a fat containing 13 ppm of sodium. When the sodium content was analyzed, it was 9.1 ppm (0.4 μmol / g). As an antioxidant, 100 ppm of mixed tocopherol and 500 ppm of an emulsifier (polyglycerin fatty acid ester) were added to obtain a fat for cooking.
The acid value analysis value after the frying test of this cooking oil / fat was 1.11, and the acid value increase inhibitory effect compared with the cooking oil / fat of Comparative Example 5 was 21.3%.

(Comparative Example 6)
100 ppm of mixed tocopherol was added as an antioxidant to purified palm oil (iodine value: 52) to obtain a fat for cooking.
The acid value analysis value after the frying test of the oil for cooking was 1.87.

(Example 6)
0.3 parts by weight of a 1% by weight aqueous sodium carbonate solution was added to 100 parts by weight of refined palm oil (iodine value: 52) heated to 70 ° C., and the mixture was stirred at a temperature of 70 ° C. and a vacuum of 40 Torr while stirring. Dehydration was performed for a minute to obtain an oil containing 13 ppm sodium. When the sodium content was analyzed, it was 7.8 ppm (0.34 μmol / g). Mix tocopherol 100 ppm was added as an antioxidant to obtain a fat for cooking.
The acid value analysis value after the frying test of this cooking oil / fat was 1.53, and the acid value increase inhibitory effect compared to the cooking oil / fat of Comparative Example 6 was 18.2%.

Table 2 shows the results of Comparative Examples 4 to 6 and Examples 4 to 6.

(Example 7)
0.5 parts by weight of a 1% by weight aqueous potassium carbonate solution is added to 100 parts by weight of palm olein (iodine value: 67) heated to 70 ° C., and is stirred for 20 minutes under the conditions of a temperature of 70 ° C. and a degree of vacuum of 40 Torr. Dehydration was performed to obtain a cooking oil / fat containing 29 ppm of potassium. When the potassium content was analyzed, it was 19.2 ppm (0.49 micromol / g).
The acid value analysis value after the frying test of this cooking oil / fat was 1.6, and the acid value increase inhibitory effect compared to the cooking oil / fat of Comparative Example 1 was 13.51%.

(Example 8)
0.5 parts by weight of a 1% by weight calcium chloride aqueous solution is added to 100 parts by weight of palm olein (iodine value: 67) heated to 70 ° C., and is stirred for 20 minutes under the conditions of a temperature of 70 ° C. and a degree of vacuum of 40 Torr. Dehydration was performed to obtain a cooking oil / fat containing 14 ppm of calcium. When the calcium content was analyzed, it was 8.4 ppm (0.21 μmol / g).
The acid value analysis value after the frying test of this cooking oil / fat was 1.75, and the acid value increase inhibitory effect compared to the cooking oil / fat of Comparative Example 1 was 5.41%.

Example 9
One part by weight of a 1% by weight magnesium chloride aqueous solution is added to 100 parts by weight of palm olein (iodine value: 67) heated to 70 ° C. and dehydrated for 20 minutes with stirring at a temperature of 70 ° C. and a vacuum degree of 40 Torr. It performed and obtained the fats and oils for heating cooking containing 24 ppm of magnesium. When the magnesium content was analyzed, it was 16.3 ppm (0.67 μmol / g).
The acid value analysis value after the frying test of this cooking oil / fat was 1.61, and the acid value increase suppressing effect compared to the cooking oil / fat of Comparative Example 1 was 12.97%.

(Example 10)
1.1 parts by weight of a 1% by weight sodium ascorbate aqueous solution was added to 100 parts by weight of palm olein (iodine value: 67) heated to 70 ° C., and the mixture was stirred at 20 ° C. and a vacuum of 40 Torr while stirring. Dehydration was performed for a minute to obtain an oil containing 13 ppm sodium. The sodium content was analyzed and found to be 8.0 ppm (0.35 μmol / g). Mix tocopherol 100 ppm was added as an antioxidant to obtain a fat for cooking.
The acid value analysis value after the frying test of this cooking oil / fat was 1.65, and the acid value increase inhibitory effect compared to the cooking oil / fat of Comparative Example 1 was 10.81%.

(Example 11)
To 100 parts by weight of palm olein (iodine value: 67) heated to 70 ° C., 0.6 part by weight of a 1% by weight trisodium citrate aqueous solution was added and stirred at a temperature of 70 ° C. and a degree of vacuum of 40 Torr. Dehydration was carried out for 20 minutes to obtain an oil containing 14 ppm sodium. The sodium content was analyzed and found to be 8.5 ppm (0.37 μmol / g). Mix tocopherol 100 ppm was added as an antioxidant to obtain a fat for cooking.
The acid value analysis value after the frying test of this cooking oil / fat was 1.52, and the acid value increase inhibiting effect compared to the cooking oil / fat of Comparative Example 1 was 17.84%.

The results of Examples 7-11 are shown in Table 3.

(Example 12)
To 100 parts by weight of palm olein (iodine value: 67) heated to 70 ° C., 0.9 part by weight of a 1% by weight aqueous solution of sodium L-glutamate was added and stirred at a temperature of 70 ° C. and a degree of vacuum of 40 Torr. Dehydration was performed for 20 minutes to obtain an oil containing 13 ppm of sodium. When the sodium content was analyzed, it was 8.2 ppm (0.36 μmol / g). Mix tocopherol 100 ppm was added as an antioxidant to obtain a fat for cooking.
The acid value analysis value after the frying test of this cooking oil / fat was 1.71, and the acid value increase inhibitory effect compared with the cooking oil / fat of Comparative Example 1 was 7.57%.

(Example 13)
7.5 parts by weight of a 1% by weight disodium succinate aqueous solution is added to 100 parts by weight of palm olein (iodine value: 67) heated to 70 ° C., with stirring at a temperature of 70 ° C. and a degree of vacuum of 40 Torr. Dehydration was performed for 20 minutes to obtain an oil containing 13 ppm of sodium. When the sodium content was analyzed, it was 8.4 ppm (0.37 μmol / g). Mix tocopherol 100 ppm was added as an antioxidant to obtain a fat for cooking.
The acid value analysis value after the frying test of this cooking oil / fat was 1.58, and the acid value increase inhibitory effect compared with the cooking oil / fat of Comparative Example 1 was 14.59%.

(Example 14)
After adding 5 parts by weight of polyglycerin condensed ricinoleic acid ester (PGPR) to 65 parts by weight of palm olein heated to 70 ° C., 30 parts by weight of 30% by weight aqueous sodium carbonate solution was added and stirred well, and 9% by weight of sodium carbonate. The acid-value raise inhibitor for fats and oils for heat cooking which contains was obtained. As a polyglycerin condensed ricinoleic acid ester, Poem PR-100 manufactured by Riken Vitamin Co., Ltd. was used.
To 100 parts by weight of palm olein (iodine value: 67) heated to 70 ° C., 220 ppm of an acid value increase inhibitor for cooking oils and fats containing 9% by weight of sodium carbonate was added, and oils and fats equivalent to 8.5 ppm of sodium were added. Got. When the sodium content was analyzed, it was 8.6 ppm (0.37 μmol / g).
The acid value analysis value after the frying test of this cooking oil / fat was 1.50, and the acid value increase inhibitory effect compared with the cooking oil / fat of Comparative Example 1 was 18.92%.

(Example 15)
After adding 5 parts by weight of polyglycerin condensed ricinoleic acid ester (PGPR) to 65 parts by weight of extremely hardened oil of refined palm oil heated to 70 ° C. and completely dissolved, 30 parts by weight of 30% by weight aqueous sodium carbonate solution was added. The mixture was poured on a well-stirred and cooled drum, and the solidified fat was scraped and pulverized, and then passed through a 10-mesh sieve to obtain a powder preparation for heating and cooking oils containing an acid value of 9% by weight of sodium carbonate. As a polyglycerin condensed ricinoleic acid ester, Poem PR-100 manufactured by Riken Vitamin Co., Ltd. was used.
To 100 parts by weight of palm olein (iodine value: 67) heated to a frying temperature of 180 ° C. in a frying pan, 220 ppm of an acid value increase suppressing powder preparation for cooking oil and fat containing 9% by weight of sodium carbonate was added, An oil containing 8.5 ppm equivalent of sodium was obtained. It was 8.3 ppm (0.36 micromol / g) when a part sampling after dispersion | distribution and the sodium content were analyzed.
The acid value analysis value after the frying test of this cooking oil / fat was 1.57, and the acid value increase inhibitory effect compared to the cooking oil / fat of Comparative Example 1 was 15.14%.

(Example 16)
200 ppm of sodium stearoyl lactate was added to 100 parts by weight of palm olein (iodine value: 67) measured in a frying pan and heated to a frying temperature of 180 ° C. When the sodium content was analyzed by sampling a part after dispersion, it was 8.3 ppm ÷ 23 (0.36 μmol / g). The acid value analysis value after the frying test of this cooking oil / fat was 1.55, and the acid value increase inhibitory effect compared with the cooking oil / fat of Comparative Example 1 was 16.21%.

(Comparative Example 7)
25.5 ppm of sodium carbonate was added to 100 parts by weight of palm olein (iodine value: 67) measured in a frying pan and heated to a frying temperature of 180 ° C. A part was sampled after dispersion and the sodium content was analyzed and found to be 0.0 ppm (0 μmol / g).
The acid value analysis value after the frying test of this cooking oil / fat was 1.81, and the acid value increase inhibitory effect compared to the cooking oil / fat of Comparative Example 1 was 2.16%.

Table 4 shows the results of Examples 12 to 16 and Comparative Example 7.

Claims (3)

After mixing at least one aqueous solution selected from each metal salt of sodium, potassium, magnesium or calcium with fats and oils, it is dehydrated, and the total amount of sodium, potassium, magnesium and calcium is 0.1 to 0.1 by quantitative determination by atomic absorption spectrophotometry. The manufacturing method of the fats and oils for cooking which suppressed the acid value raise by heating characterized by containing 1 micromol / g. Inhibition of increase in acid value for cooking oils and fats, characterized in that it is a water-in-oil emulsion composition containing one or more aqueous solutions selected from metal salts of sodium, potassium, magnesium, or calcium, a substrate and an emulsifier. Agent. 1. One or more components selected from sodium, potassium, magnesium, or calcium metal salts are contained.