JPH05155806A - Production of metallic salt of fatty acid - Google Patents

Abstract

PURPOSE:To obtain a powdery or granular fatty acid metallic salt reduced in deterioration due to the oxidation by adding a fatty acid as a raw material having a specific iodine value to a dispersion obtained by dispersing a metal hydroxide other than alkali metals into water and reacting the fatty acid with the metal hydroxide. CONSTITUTION:A fatty acid having >=100 iodine value (e.g. linolic acid) is added to a dispersion obtained by dispersing a metal hydroxide other than alkali metals (e.g. calcium hydroxide of 1-2.8 equivalent ratio based on the fatty acid) in water of 4 times the weight of the fatty acid. Then, these components are made to react at a temperature 1-20 deg.C higher than melting point of the fatty acid to provide the objective powdery or granular fatty acid metallic salt. Since the fatty acid metallic salt obtained by this method is not subjected to deterioration by the oxidation, it can be utilized as feeds for pisciculture, livestock, etc.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a fatty acid metal salt (hereinafter simply referred to as a fatty acid metal salt) other than an alkali metal salt. The present invention relates to a method for producing a granular fatty acid metal salt.

[0002]

2. Description of the Related Art As a method for producing a fatty acid metal salt, a direct melting method in which a fatty acid and a metal compound are directly subjected to a melting reaction at a high temperature,
A metathesis method in which an aqueous solution of an inorganic metal salt is added to an aqueous solution of a fatty acid sodium salt to release metallic soap is widely adopted. However, these methods require heating during the reaction, and when a fatty acid having an iodine value of 100 or more is used as a raw material, the heating causes oxidative deterioration of the fatty acid.

As a method for producing a fatty acid metal salt at low temperature, Japanese Patent Publication No. 61-20275 discloses a method for producing a fatty acid metal salt by decomposing fats and oils with lipase in the presence of a metal hydroxide. , Japanese Sho 60-12
In Japanese Patent No. 337, a method for producing a fatty acid metal salt by dispersing a metal oxide or a metal hydroxide in a fatty acid, and then adding water thereto and reacting the mixture is also disclosed.
JP-A-154709 discloses that a fatty acid metal salt is produced by reacting an aqueous solution or suspension of a metal hydroxide with a fatty acid at a temperature equal to or lower than the melting point while stirring and then reacting at a temperature equal to or higher than the melting point of the fatty acid. The method to do is proposed.

[0004]

[Problems to be Solved by the Invention] Japanese Patent Publication No. 61-2027
In the method according to the publication No. 5, it takes a long time to complete the reaction and an enzyme is used for the reaction, so that the production cost becomes high. Japanese Examined Patent Publication No. 60-12337 and Japanese Patent Laid-Open No. Sho 5
In the method according to 4-154709, as raw materials,
When a fatty acid having an iodine value of 100 or more is used, it takes a long time for the reaction or reaction conditions such as high temperature and high pressure are required, which leads to oxidative deterioration of the fatty acid, and the reaction product causes aggregation in the reaction system. There is a problem that a uniform product cannot be obtained. The present invention uses an iodine value of 10 as a raw material.
An object of the present invention is to provide a method for producing a fatty acid metal salt by a simple operation without oxidative deterioration of 0 or more fatty acids.

[0005]

That is, according to the present invention, a fatty acid having an iodine value of 100 or more is used, and a metal hydroxide other than an alkali metal in a ratio of 1 to 2.8 equivalent of the fatty acid is used in an amount of 4% by weight of the fatty acid.
It is a method for producing a fatty acid metal salt, characterized in that the fatty acid metal salt is added to a dispersion liquid that is twice or more the amount of water and reacted at a temperature 1 to 20 ° C. higher than the melting point of the fatty acid.

Examples of the fatty acid having an iodine value of 100 or more used in the present invention include fatty acids such as linoleic acid and linolenic acid, vegetable oils such as soybean oil, linseed oil, perilla oil, and tung oil, or sardine oil and mackerel oil. Examples thereof include fatty acids obtained by hydrolyzing aquatic animal fats and oils such as shark liver oil, cod liver oil, and whale oil. These fatty acids may be used alone or in combination of two or more. The fatty acid may contain fats and oils, but if the fats and oils content exceeds 35% by weight, agglomerates are formed, which is not preferable.

Examples of the metal hydroxide other than the alkali metal used in the present invention include calcium hydroxide, magnesium hydroxide, barium hydroxide, zinc hydroxide and the like, and these may be used alone or in a mixture of two or more kinds. You can This metal hydroxide is used in an amount of 1 to 2.8 equivalents with respect to the fatty acid, but if it is less than 1 equivalent, the amount of unreacted fatty acid increases and aggregates are formed. If it exceeds 2.8 equivalents, unreacted hydroxide increases, which is not preferable.

The amount of water in which this metal hydroxide is dispersed is
It is more than 4 times the weight of fatty acids. When the amount of water is less than 4 times by weight, the reaction product easily aggregates in the reaction system. The upper limit of the amount of water is not particularly limited, but the production efficiency decreases as the amount increases.

The reaction temperature is 1 to 2 above the melting point of the raw material fatty acid.
The temperature is higher by 0 ° C, and the reaction does not proceed below 1 ° C. Two
If the temperature exceeds 0 ° C, oxidative deterioration of fatty acids will occur, and the produced fatty acid metal salt will agglomerate, which is not preferable.

The method of adding the fatty acid is not particularly limited, but it is preferable to add or drop the fatty acid while stirring the dispersion of the metal hydroxide.

[0011]

According to the present invention, a powdery or granular fatty acid metal salt can be produced by a simple operation without oxidative deterioration of a fatty acid having an iodine value of 100 or more. Furthermore, since the fatty acid metal salt obtained by the present invention has not been subjected to oxidative deterioration, it can be used for fish feed, livestock feed and the like.

[0012]

EXAMPLES The present invention will be specifically described below with reference to examples. Incidentally, ΔPOV is the difference between the peroxide value of the fatty acid metal salt produced and the peroxide value of the raw material fatty acid.

Example 1 55 parts by weight of calcium hydroxide (1.4 equivalent ratio of fatty acid)
Of linoleic acid (purity: 95% by weight, iodine value: 175.6, melting point: -1.
300 parts by weight (2 ° C.) was evenly sprayed onto the dispersion over 1 hour, and then kept at the same temperature for 30 minutes. After that, it is filtered, washed with water, and dried in vacuum at 30 ° C. and 0.1 mmHg for 3 hours to obtain a water content of 2.0% by weight, a free fatty acid of 0.8% by weight, and a ΔP.
296 parts by weight of OV 0.1 white powder was obtained.

Example 2 62 parts by weight of calcium hydroxide (1.68 equivalent ratio of fatty acid) was dispersed in 2500 parts by weight of water.
While maintaining the temperature at 450 ° C. and stirring at 450 rpm, 300 parts by weight of soybean oil fatty acid (iodine value: 120.7, melting point: 19.5 ° C., fat and oil content of 6.8% by weight) was uniformly added dropwise to the dispersion liquid over 30 minutes. After that, it was kept at the same temperature for 1 hour. After that, filtration, centrifugal dehydration, and air drying at room temperature for 24 hours, water 5.9% by weight, free fatty acid 1.9% by weight, ΔPOV0.
272 parts by weight of white granules of No. 2 were obtained.

Example 3 79 parts by weight of calcium hydroxide (2.68 equivalent ratio of fatty acid) was dispersed in 3000 parts by weight of water, and 30 parts of this dispersion was used.
Maintained at 800 ° C. and stirred at 800 rpm, a fatty acid (iodine value: 154.
2, melting point: 21.4 ° C., fat content 23.5% by weight) 30
0 part by weight was uniformly added dropwise to the dispersion over 1 hour, and the mixture was kept at the same temperature for 1 hour. After that, it is filtered to remove water 28.
422 parts by weight of yellow granules of 1% by weight, free fatty acid 2.0% by weight, and ΔPOV 0.3 were obtained.

Example 4 48 parts by weight of calcium hydroxide and 20 parts of magnesium hydroxide
Parts by weight (2.05 equivalent ratio of fatty acid) are dispersed in 2700 parts by weight of water, and the dispersion is kept at 20 ° C. and 650 rpm.
Fatty acid obtained by enzymatic decomposition of soybean oil while stirring at 15
A mixture of 0 parts by weight and 150 parts by weight of a fatty acid obtained by enzymatically decomposing perilla oil (iodine value: 201.1, melting point: 12.6
(° C, fat and oil content of 9.7% by weight) was uniformly added dropwise to the dispersion over 1 hour, and the mixture was kept at the same temperature for 1 hour. After that, filtration, compression dehydration, and ventilation drying at 35 ° C. for 8 hours under a nitrogen stream are performed to obtain 253 parts by weight of white granules having a water content of 3.1% by weight, free fatty acids of 0.9% by weight, and ΔPOV of 0.2. It was

Comparative Example 1 The same conditions as in Example 2 were used except that the temperature of the dispersion liquid was 80 ° C. After the dropwise addition of the fatty acid, the reaction mixture agglomerated and the stirring became difficult. The free fatty acid of the aggregate was 13.5% by weight, ΔPOV was 17.8, the amount of unreacted fatty acid was large, and the degree of oxidative deterioration was large.

Comparative Example 2 The same conditions as in Example 3 were used except that the temperature of the dispersion liquid was set to 15 ° C. After the dropwise addition of the fatty acid, the reaction mixture agglomerated and the stirring became difficult. The free fatty acid of the aggregate was 68.5% by weight and ΔPOV was 0.1, the amount of unreacted fatty acid was very large, and the reaction was hardly progressed.

Comparative Example 3 Alaska pollack liver oil (iodine value: 150.3, freezing point:
(9.8 ° C.) 500 parts by weight to 500 parts by weight of a 20% by weight aqueous ethanol solution, and while stirring at 600 rpm, 30
After 220 parts by weight of an aqueous solution of sodium hydroxide in weight% was gradually added, the mixture was kept at 60 ° C. for 1 hour. Since the viscosity of the solution increased, add 500 parts by weight of warm water and then bring it to 80 ° C.
300 parts by weight of a 0% by weight calcium chloride aqueous solution (1 equivalent ratio of fatty acid) was added dropwise uniformly over 1 hour, and then the mixture was kept at 60 ° C. for 1 hour. After filtering, washing with water, dehydration, and drying under reduced pressure at 30 ° C. for 3 hours, 465 parts by weight of a powder containing 4.5% by weight of water, 4.8% by weight of free fatty acid and a yellowish brown partial agglomerate of ΔPOV19.7. Obtained. This manufacturing method is complicated to operate,
The degree of oxidative deterioration was also large.

Claims (1)

[Claims] 1. A fatty acid having an iodine value of 100 or more is added to a dispersion liquid in which a metal hydroxide other than an alkali metal in a 1 to 2.8 equivalent ratio of the fatty acid is dispersed in water which is 4 times or more the weight of the fatty acid, A method for producing a fatty acid metal salt, which comprises reacting at a temperature 1 to 20 ° C. higher than the melting point of the fatty acid.