Method for cooling oil after processing in oil oxidation value reduction technology and apparatus thereof

Abstract

To solve the problem that regeneration of deteriorated oil or fat by bubbling superheated steam sometimes results in an increase in anisidine value and peroxide value (POV) of the regenerated oil or fat relative to prior to regeneration.SOLUTION: Provided is a method for suppressing elevation of at least one index selected from anisidine value, acid value, and peroxide value of regenerated oil or fat, the method including the step of cooling the regenerated oil or fat immediately after regeneration, the regenerated oil or fat being obtained by regeneration through life extension of oil or fat, in which the oil or fat is heated by bubbling superheated steam that has reached at a predetermined temperature so as to vaporize at least one or all of free fatty acids, polar compounds such as polymers, and moisture contained therein.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a method for regenerating fats and oils. [Background technology]

[0002] During use, cooking oils oxidize due to various factors, causing changes in color, odor, and viscosity. This is problematic because food cooked in such oils has a bad flavor and can be harmful to the health of those who eat it.

[0003] Patent Document 1 discloses a method for reducing the acid value (AV) of fats and oils by bubbling superheated steam to vaporize and remove free fatty acids, polar compounds, moisture, and other substances that cause deterioration of fats and oils.

[0004] However, the anisidine value and peroxide value (POV) of fats and oils treated by this method are still unknown. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent Publication No. 2024-134544 Summary of the Invention [Problem to be solved by the invention]

[0006] When deteriorated fats and oils are regenerated by bubbling superheated steam, the anisidine value and peroxide value of the regenerated fats and oils may be higher than those before regeneration. That is, even if the acid value is reduced, other oxidation indicators may increase. [Means for solving the problem]

[0007] In order to solve the above problems, the inventors of the present invention have made considerable efforts and discovered that cooling the oils and fats regenerated by bubbling superheated steam immediately after regeneration can suppress the increase in the anisidine value and peroxide value, thereby completing the present invention.

[0008] That is, the present invention includes the inventions described in [1] to [3] below. [1] A method for suppressing an increase in at least one index of anisidine value, acid value, and peroxide value of recycled oil and fat, The method includes cooling the reconstituted fat immediately after reconstitution; The regenerated oils and fats are regenerated by extending the life of the oils and fats, characterized in that the oils and fats are heated by bubbling with superheated steam that has reached a predetermined temperature, and at least any or all of the free fatty acids, polar compounds such as polymers, and water contained in the oils and fats are vaporized. method. [2] The method according to [1], which is a method for suppressing increases in all indexes of the anisidine value, acid value, and peroxide value of the recycled oil and fat. [3] This cooling device is used in connection with a fat recycling device that heats fats and oils by bubbling superheated steam that has reached a predetermined temperature, and cools the recycled fats and oils discharged from the fat recycling device with a refrigerant. [Effects of the Invention]

[0009] The present invention can suppress increases in the anisidine value and peroxide value of fats and oils regenerated by bubbling superheated steam. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a diagram showing the configuration of a device for cooling the grease recovered from the grease recycling device. DETAILED DESCRIPTION OF THE INVENTION

[0011] The anisidine value is an indicator of the degree of oxidation of cooking oil and is measured by measuring the amount of carbonyl compounds.The peroxide value is also an indicator of the degree of oxidation of cooking oil and is measured by measuring the amount of iodine liberated by oxidizing iodide ions.

[0012] In this specification, when an increase in an index is suppressed by a certain method, it means that the value of the index becomes relatively low compared to when the method is not used.

[0013] Temperatures in this specification are in degrees Celsius unless otherwise specified.

[0014] <Method of the present invention> In the method of the present invention, the recycled oil can be cooled by cooling the pipe through which the oil passes with a refrigerant. The temperature of the refrigerant is lower than the temperature of the recycled oil, preferably 20°C or lower, more preferably 5°C or lower. Any refrigerant can be used as long as it can cool the object. For example, the refrigerant can be air or water.

[0015] The cooling of the recycled oils and fats in the method of the present invention can be carried out in a cooling device including a container for storing a refrigerant and piping that passes through the refrigerant so as to be in contact with the refrigerant. The material of the container is not particularly limited as long as it can withstand the internal pressure and the temperature of the refrigerant, and is, for example, a stainless steel container or an aluminum container. The piping is not particularly limited as long as it is made of a material with high thermal conductivity, and is, for example, a metal piping, preferably a stainless steel piping, a copper piping, or an aluminum piping, and more preferably a copper piping or an aluminum piping.

[0016] The length of the cooling pipe can be selected so that the oil is sufficiently cooled, taking into consideration the temperature and physical properties of the recycled oil, the type of refrigerant used, etc. Whether the oil has been sufficiently cooled can be determined by whether the increase in the anisidine value and peroxide value of the recovered oil has been suppressed.

[0017] In the method of the present invention, the step of heating fats and oils by bubbling superheated steam that has reached a predetermined temperature in order to regenerate the fats and oils can be performed using the method described in Patent Document 1. In addition, the device described in Patent Document 1 can be used as the fats and oils regeneration device for this step.

[0018] The bubbling of superheated steam used in the method of the present invention can be carried out using the superheated steam heated to 140 degrees or higher, preferably 180 degrees or higher and 400 degrees or lower, more preferably 200 degrees or higher and 380 degrees or lower.

[0019] The bubbling of superheated steam used in the method of the present invention can be carried out by spraying the superheated steam formed into minute bubbles from a nozzle. Alternatively, the bubbling of superheated steam can be carried out while stirring the oil or fat to be treated by an appropriate method.

[0020] The bubbling of superheated steam used in the method of the present invention can be carried out by introducing the oil or fat to be treated into an oil tank for bubbling while mixing it with superheated steam.

[0021] In one embodiment, the present invention provides a method for producing a medicament for the treatment of a pulmonary arthritis. A method for suppressing an increase in at least one index of anisidine value, acid value, and peroxide value of recycled oil and fat, The method includes cooling the reconstituted fat immediately after reconstitution; The regenerated oils and fats are regenerated by extending the life of the oils and fats, characterized in that the oils and fats are heated by bubbling with superheated steam that has reached a predetermined temperature, and at least any or all of the free fatty acids, polar compounds such as polymers, and water contained in the oils and fats are vaporized. It is a method.

[0022] In another embodiment, the present invention provides a method for producing a pharmaceutical composition comprising: A method for suppressing increases in all indexes of anisidine value, acid value, and peroxide value of recycled oil and fat, The method includes cooling the reconstituted fat immediately after reconstitution; The regenerated oils and fats are regenerated by extending the life of the oils and fats, characterized in that the oils and fats are heated by bubbling with superheated steam that has reached a predetermined temperature, and at least any or all of the free fatty acids, polar compounds such as polymers, and water contained in the oils and fats are vaporized. It is a method.

[0023] <Device of the present invention> FIG. 1 is a diagram showing a cooling device 30 according to an embodiment of the present invention.

[0024] The recycled grease discharged from the outlet 12 of the grease recycling device 10 passes through the pipe 20 and into the cooling device 30. During this process, heat is transferred from the recycled grease to the refrigerant 32, and the recycled grease is cooled.

[0025] The cooled reclaimed fat can be reused by reheating it to an optimum temperature depending on the nature of the cooking process used.

[0026] By adopting the configuration of the device of the present invention, it is possible to use the fryer continuously while continuing the frying operation in the fryer without interrupting the work process, and while suppressing an increase in the anisidine value and peroxide value of the recycled oil and fat.

[0027] In one embodiment, the present invention provides a method for producing a medicament for the treatment of a pulmonary arthritis. This cooling device is used in connection with an oil recycling device that heats oils and fats by bubbling superheated steam that has reached a predetermined temperature, and cools the recycled oils and fats discharged from the oil recycling device using a refrigerant.

[0028] For a better understanding of the present invention, reference is made to specific examples which are provided herein for purposes of illustration and not limitation. [Example]

[0029] <Comparative Example: Regeneration of fats and oils by bubbling with superheated steam> Cooking oil that had been used for cooking and had deteriorated at 160 to 180 degrees was placed in a reactor. The oil was then bubbled with superheated steam at 270 degrees for 30 minutes. The oil was heated to a temperature of 240 to 250 degrees by the superheated steam. The oil was then collected from the outlet.

[0030] The acid value, anisidine value, and peroxide value of the recovered edible oil were measured, and the results are shown in Table 1.

[0031] [Table 1]

[0032] The regeneration resulted in a decrease in the acid value, while the anisidine value and peroxide value increased.

[0033] <Example: Cooling of recycled oils and fats immediately after recycling> After the oil and fat were regenerated in the same manner as in the comparative example, the pipe extending from the outlet was cooled with running water and ice.

[0034] The acid value, anisidine value, and peroxide value of the recovered oils and fats were measured, and the results are shown in Table 2.

[0035] [Table 2]

[0036] The acid value was reduced as in the comparative example, while the rate of increase in the anisidine value and peroxide value was suppressed compared to those in the comparative example. [Industrial Applicability]

[0037] The present invention is expected to be useful in suppressing increases in the anisidine value and peroxide value of fats and oils regenerated by bubbling with superheated steam. [Explanation of symbols]

[0038] 10…Oil regeneration device 12…Discharge port 20...Piping 30…Cooling device 32...Refrigerant

Claims

1. A method for suppressing an increase in at least one index of anisidine value, acid value, and peroxide value of recycled oil and fat, comprising: The method includes cooling the reconstituted fat immediately after reconstitution; The regenerated oils and fats are regenerated by extending the life of the oils and fats, characterized in that the oils and fats are heated by bubbling with superheated steam that has reached a predetermined temperature, and at least any or all of the free fatty acids, polar compounds such as polymers, and water contained in the oils and fats are vaporized. method.

2. The method according to claim 1, which is a method for suppressing increases in all indices of the anisidine value, acid value and peroxide value of the regenerated oil or fat.

3. This cooling device is used in connection with a fat recycling device that heats fats and oils by bubbling superheated steam that has reached a predetermined temperature, and cools the recycled fats and oils discharged from the fat recycling device with a refrigerant.

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