JPS6248719B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a method for solvent fractionation of monkey seed fat (hereinafter sometimes abbreviated as monkey fat) using n-hexane. More specifically, the present invention relates to a method for fractionating salcido fat using n-hexane to obtain good crystals with well-organized particles that can be easily filtered through a cloth. Salcido fat is an oil extracted from the seeds of Scioria robusta, and solvent fractionation is performed to separate salcido fat into a low melting point triglyceride component (soft oil) and a medium melting point triglyceride component (medium oil). Conventionally, by using highly polar solvents such as acetone, the objective was achieved with one cooling crystallization and separation, and moreover, it was easy to separate the cloth and
There was over-separation. However, when solvent fractionation is performed using n-hexane, a non-polar solvent that is allowed as a food additive, the crystals that precipitate and grow become uneven and fine, and when using a cloth sieve, the cloth becomes clogged with crystals. There is a problem in that it takes a long time to separate. An object of the present invention is to facilitate the filtering process by creating crystals with well-organized particles and good permeability when sal fat is fractionated using n-hexane. The method for fractionating salseed fat of the present invention involves adding and mixing 0.2 to 3 parts of n-hexane to 1 part of salseed fat (based on weight, the same applies hereinafter), heating and melting the mixture, and then cooling the mixture to 10°C. The first step is to remove high-melting components that crystallize at temperatures above, and the resulting liquid is heated and melted so that the amount of n-hexane is 2 to 5 parts per 1 part of Salcido fat in the liquid. After cooling, the oil and fat that crystallizes at a temperature of -10°C or higher is separated from the liquid oil by cooling while stirring so that the movement speed of the crystals by stirring is 57 m/min or less.
It is characterized by consisting of a process. The salseed fat used in the first step of the present invention is preferably a refined oil obtained by deacidifying and decolorizing the salseed oil extracted from the seeds of Syriac robusta.
In the first step, high melting point components with a melting point of 60°C or higher are efficiently separated at a temperature of 10°C or higher. Next, n-hexane is added to the liquid from which the high melting point portion has been removed, as necessary, so that the ratio of salcido fat to n-hexane is 1:2 to 5. When stirred and cooled under the above conditions, fats and oils (medium oil) that crystallize at temperatures above -10°C crystallize as crystals with uniform particle size.
Good quality soft oil and medium oil can be obtained by cloth/overseparation. According to the fractionation method of the present invention, when salcido fat is fractionated into soft oil and medium oil, uniform crystals with well-organized particles can be obtained, making it possible to easily filter the oil. EXAMPLES The present invention will be explained in further detail with reference to Examples below. Example 1 0.2 part of n-hexane was added to 1 part of deoxidized and bleached monkey fat with an iodine value of 41.5, dissolved by heating, and then stirred and cooled from 55°C to 22°C for 3 hours, and then further heated to 22°C.
Add 0.6 parts of n-hexane, filter through a cloth, and separate the liquid.
The solution was washed with 0.5 part and high melting point components were separated (first step). Further n-hexane was added to the liquid obtained in the next step, and the amount of n-hexane in the liquid was adjusted to 2 parts per 1 part of oil in the liquid. After completely dissolving this, stirring was performed by operating the crystal movement speed between 12 m/min and 36 m/min after crystal generation, cooling from 35°C to -2°C in 5 hours, and stirring at -2°C for 30 minutes. did. -5
℃ After adding 1 part of n-hexane to the amount of oil, the cloth
I made a mistake. After separating the liquid, keep the crystal part at -10℃.
Washing was performed with 1 part of n-hexane, and when the surface of the crystal part became dry, overtreatment was completed and medium oil was fractionated (second step). Overspeed of the first step (Air permeability 20c.c. when suctioning at a pressure of 560mmHg/
The amount of liquid that could be processed in 10 seconds per 1 m ² of industrial overflow cloth (the same applies hereinafter) was 65/m ² in 10 seconds ^, and the overspeed in the second step was 56/m ² in 10 seconds. It was very good. The obtained partial oils were as follows.

[Table] Example 2 Add 3 parts of n-hexane to 1 part of monkey fat used in Example 1 and dissolve by heating to 55°C. After stirring and cooling from 55°C to 10°C for 4 hours, filter through a cloth. After fractionating the liquid, the crystalline portion was washed with 0.5 part of n-hexane at 5° C., and high melting point components were fractionated (first step). Next, further n-hexane was added to this liquid so that the amount of n-hexane in the liquid was 5% relative to the liquid oil.
The volume was adjusted to double the volume, heated and then cooled from 35℃ to -10℃ in 6 hours, stirring at a crystal movement speed of 32m/min.
After stirring and holding at -10℃ for 30 minutes, the crystalline part was washed with n-hexane at -15℃ with one part of the raw monkey fat to obtain each partial oil ( 2nd step). The overspeed of the first step is 62/m ² in 10 seconds,
The second step was 46/m ² in 10 seconds, which was very good. The obtained partial oils were as follows.

[Table] Comparative Example 1 Add 2 parts of n-hexane to 1 part of monkey fat used in Example 1 and dissolve by heating to 55°C, then cool to -2
°C for 8 hours, stirring was the same as in Example 1 at -2 °C.
After holding for 30 minutes, add 1 part of n-hexane to the amount of oil at -5℃.
After addition of 50%, the same cloth filtration as in Example 1 was carried out. The overspeed was 2/m ² in 10 seconds, the crystals were extremely occlusive to the cloth and separation was poor. The various oils obtained were as follows.

[Table] The increase in the yield of medium oil is due to the fact that since the crystals are finer, the bulk specific gravity of the crystal cake is also larger, and accordingly more soft oil is trapped. Since such medium oil contains some soft oil, separation is unclear and the quality is inferior. Comparative Example 2 Add 5 parts of n-hexane to 1 part of monkey fat used in Example 1, heat and dissolve, cool to -10°C for 10 hours, and stir at -10°C for 30 minutes as in Example 2. After holding, cloth and filtration were performed. Overspeed is 3.5 in 10 seconds
/m ² , the crystals were fine, there was a clear tendency to clog industrial cloth, and separation was poor. The various oils obtained were as follows.

[Table] Comparative Example 3 5 parts of acetone was added to 1 part of Salcido fat used in Example 1, and after heating and dissolving it, it was cooled from 55°C to 14°C in 5 hours, stirring was the same as in Example 2, but at 14°C. After holding for 30 minutes, it was filtered with a cloth. Overspeed is 10 seconds, 52/
^m2 was good. The crystalline portion was then washed with 1 part of acetone at 12°C to obtain each partial oil. The obtained partial oil was as follows.

【table】

Claims (1)

[Claims] 1 Add 0.2 to 3 parts of n-hexane to 1 part of Salcido fat (same parts below), mix, heat,
The first step is to cool down after dissolving and remove high melting point components that crystallize at a temperature of 10°C or higher, and to add n-
Adjust the amount of hexane to 2 to 5 parts and heat.
After dissolving, the crystal movement speed due to stirring is 57
Cool while stirring so that the temperature is -10 m/min or less.
A method for separating salcido fat, comprising a second step of separating fats and oils that crystallize at temperatures above ℃ from a liquid.