WO2023008391A1 - 食用油劣化抑制フィルタ及びその製造方法 - Google Patents
食用油劣化抑制フィルタ及びその製造方法 Download PDFInfo
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- WO2023008391A1 WO2023008391A1 PCT/JP2022/028672 JP2022028672W WO2023008391A1 WO 2023008391 A1 WO2023008391 A1 WO 2023008391A1 JP 2022028672 W JP2022028672 W JP 2022028672W WO 2023008391 A1 WO2023008391 A1 WO 2023008391A1
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- Prior art keywords
- edible oil
- deterioration
- suppression filter
- filter according
- fibers
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- 238000004519 manufacturing process Methods 0.000 title claims description 38
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- 239000003795 chemical substances by application Substances 0.000 claims abstract description 17
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- 235000010443 alginic acid Nutrition 0.000 claims abstract description 5
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- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 12
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- 239000011347 resin Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000001632 sodium acetate Substances 0.000 description 1
- 235000017281 sodium acetate Nutrition 0.000 description 1
- 239000001509 sodium citrate Substances 0.000 description 1
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 description 1
- 235000011083 sodium citrates Nutrition 0.000 description 1
- 239000001540 sodium lactate Substances 0.000 description 1
- 235000011088 sodium lactate Nutrition 0.000 description 1
- 229940005581 sodium lactate Drugs 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- 235000013337 tricalcium citrate Nutrition 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B3/00—Refining fats or fatty oils
- C11B3/008—Refining fats or fatty oils by filtration, e.g. including ultra filtration, dialysis
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J37/00—Baking; Roasting; Grilling; Frying
- A47J37/12—Deep fat fryers, e.g. for frying fish or chips
- A47J37/1223—Deep fat fryers, e.g. for frying fish or chips with means for filtering the frying liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
- B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
- B01D39/1615—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of natural origin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
- B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
- B01D39/1623—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
- B01D39/18—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being cellulose or derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B3/00—Refining fats or fatty oils
- C11B3/10—Refining fats or fatty oils by adsorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/04—Additives and treatments of the filtering material
- B01D2239/0407—Additives and treatments of the filtering material comprising particulate additives, e.g. adsorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/04—Additives and treatments of the filtering material
- B01D2239/0471—Surface coating material
- B01D2239/0492—Surface coating material on fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
- B01D2239/0645—Arrangement of the particles in the filtering material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/10—Filtering material manufacturing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/74—Recovery of fats, fatty oils, fatty acids or other fatty substances, e.g. lanolin or waxes
Definitions
- the present invention relates to an edible oil degradation suppression filter capable of suppressing oxidative degradation of edible oil and a manufacturing method thereof.
- Edible oil is used for various foods, but edible oil used for cooking deep-fried foods such as tempura and fries is oxidized and deteriorated by heating and standing during cooking, and deteriorates the taste, odor, and appearance of the food. Together, it can cause food poisoning. Since the oxidatively deteriorated oil increases in viscosity and becomes difficult to run out of oil, edible oil that is oxidatively deteriorated beyond a predetermined standard is discarded. Therefore, from the viewpoint of protecting the global environment, it is desired to delay the oxidative deterioration of edible oil as much as possible to reduce the number of disposal times of edible oil. In addition, by reducing the frequency of disposal of edible oil, there is also the advantage of reducing the frequency of cleaning fried food cooking utensils (fryers) used for fried food and reducing the amount of water used for cleaning.
- Patent Document 1 discloses a method of using a tartrate as an edible oil clarifier and adding the clarifier to the edible oil as it is.
- Patent Document 1 also describes a filter in which, for example, potassium hydrogen tartrate is sandwiched between papers and the periphery of the papers is closed to form a bag.
- Patent Literature 2 discloses a filter in which an edible oil deterioration inhibitor is attached to at least one or both of the surface of a filter medium and the inner surfaces of pores using a binder.
- Patent Document 3 describes a filter for edible oil filtration obtained by stirring and mixing fibers such as pulp and an adsorbent such as activated carbon powder in water and dehydrating the mixture by compression molding.
- the filter described in Patent Document 3 since the filter described in Patent Document 3 has an adsorbent attached to the fibers, it has sufficient decolorizing and deodorizing effects, but cannot sufficiently suppress deterioration of edible oil. Therefore, it is difficult to reduce the number of times the edible oil is discarded, and there is room for further improvement from the viewpoint of global environmental conservation.
- the adhesive force between the fibers and the adsorbent is weak, the adsorbent may fall off from the fibers, which may impair the flavor of the food, as in the case of Patent Document 1.
- Filter aids have the effect of suppressing the deterioration of edible oils, but since they are in the form of powder, dust may scatter when sprayed, and it is necessary to collect clay-like filter aids during cleaning after filtration. There is a problem of reduced work efficiency.
- the present invention has been made in view of such problems, and can efficiently and easily suppress the deterioration of edible oil without using a filter aid, etc.
- An object of the present invention is to provide an edible oil deterioration suppressing filter capable of preventing deterioration of the flavor of food.
- the present invention can easily manufacture a filter for suppressing deterioration of cooking oil having an excellent deterioration suppressing function, and can suppress the generation of environmentally hazardous substances during manufacturing, thereby realizing global environment conservation. It is an object of the present invention to provide a method for manufacturing an edible oil deterioration suppressing filter.
- Japanese Patent Application No. 2021-121669 that it is possible to efficiently and easily suppress the deterioration of edible oil without using a filter aid or the like. At the same time, they have proposed a technique for preventing deterioration of the flavor of food due to detachment of the deterioration inhibitor.
- a fiber that is a filter base material and a deterioration inhibitor are added to water and diffused, which is also called a "papermaking method”. It proposes a method of preparing an aqueous suspension by mixing, dehydrating and drying the aqueous suspension.
- the deterioration inhibitor is held by the fibers without using a binder or the like, the deterioration of the edible oil can be efficiently prevented, and the deterioration inhibitor can be prevented from falling off.
- the filter can be easily manufactured.
- the process for manufacturing the filter medium and the process for attaching the additive can be performed in one process, it is possible to suppress the increase in manufacturing costs and reduce the environmental load required for manufacturing. It can suppress the increase of matter and energy.
- water is used as a dispersion medium, it contributes to global environmental conservation.
- an oxide particularly an alkaline earth metal oxide, is used as a deterioration inhibitor, and in consideration of global environmental protection, it is used in the process of obtaining a suspension during the manufacture of a filter for suppressing deterioration of edible oil.
- Another object of the present invention is to provide an edible oil degradation suppressing filter capable of suppressing deactivation of a degradation suppressing function even when water is used as a liquid, and a manufacturing method thereof.
- the above object of the present invention is achieved by the following [1] configuration related to the edible oil deterioration suppression filter.
- a fiber comprising at least one deterioration inhibitor selected from carbonates, silicates, tartrates, oxides, hydroxides, alginates and phosphates; An edible oil deterioration suppression filter.
- preferred embodiments of the present invention related to the edible oil degradation suppression filter relate to the following [2] to [18].
- the deterioration inhibitor is an oxide and further has a hydration reaction retarder made of sugar alcohol.
- the sugar alcohol is at least one selected from erythritol, glycerin, lactitol, maltitol, mannitol, xylitol and sorbitol.
- the fiber has a trunk portion and a branch portion branched from the trunk portion by beating, The edible oil deterioration suppression filter according to [12], wherein the branch-like portion holds particles containing the deterioration inhibitor.
- the edible oil degradation suppression filter according to [12] or [13], wherein the fibers are either one or both of natural fibers and artificial fibers.
- the edible oil degradation suppression filter according to [14], wherein the artificial fiber is one or both of regenerated fiber and synthetic resin fiber.
- the adsorbent contains at least one selected from silicon dioxide, natural clay, artificial synthetic clay and activated carbon.
- [19] A method for manufacturing the edible oil deterioration suppression filter according to any one of [1] to [18], obtaining a suspension containing the fibers and the deterioration inhibitor; deliquoring and drying the suspension; A method for manufacturing an edible oil deterioration suppression filter.
- the edible oil deterioration suppression filter can efficiently and easily suppress oxidative deterioration of edible oil without using a filter aid or the like, and can prevent the degradation inhibitor from coming off.
- the manufacturing method of the present invention it is possible to easily manufacture a filter for suppressing deterioration of cooking oil having an excellent function of suppressing deterioration.
- the present invention even when water is used as a liquid in the process of obtaining a suspension in the manufacture of the edible oil degradation suppression filter in consideration of global environmental protection, sufficient degradation suppression function is lost. It is possible to provide an edible oil deterioration suppressing filter capable of suppressing activity and a method for manufacturing the same.
- FIG. 1 is a drawing-substituting photograph showing the surface of the filter for suppressing deterioration of cooking oil according to the present embodiment.
- FIG. 2 is a drawing-substituting photograph showing a cross section of the filter for suppressing deterioration of cooking oil according to the present embodiment.
- FIG. 3 is a schematic diagram showing an example of a cooking oil filtering device to which the cooking oil deterioration suppression filter according to the present embodiment can be applied.
- the edible oil deterioration suppression filter may be simply referred to as a "filter”.
- this embodiment shows an example of the present invention, and the present invention is not limited to this embodiment.
- various changes or improvements can be added to the present embodiment, and forms to which such changes or improvements are added can also be included in the present invention.
- the edible oil degradation suppression filter according to the present embodiment includes fibers and a degradation inhibitor.
- the fibers and deterioration suppressing agent that can be used in the filter for suppressing deterioration of cooking oil according to the present embodiment will be described below in detail.
- Either one or both of natural fibers and artificial fibers can be used as the fibers used as the filter material. Although these fibers can be used as they are, they are preferably beaten. By using beaten fibers as the fibers that are the material of the filter, it is possible to greatly improve the holding power of the deterioration inhibitor.
- a fluff is formed to form a stem-like portion and branch-like portions branched from the stem-like portion. The branch-like portion is thinner than the stem-like portion, and in the manufacturing process, the branch-like portion is entangled with the particulate deterioration inhibitor in the liquid, so that the deterioration inhibitor can be firmly held.
- the degradation inhibitor can be prevented from falling off, and the edible oil after filtering can be prevented from being mixed with the degradation inhibitor. be able to.
- the diameter of the branch-like portion is preferably 50% or less of the diameter of the stem-like portion in order to obtain the effect of sufficiently retaining the deterioration inhibitor. , is more preferably 40% or less, and even more preferably 30% or less.
- the term "beaten fibers" includes disaggregated fibers.
- the deterioration suppressing agent is held in the fibers, preferably the beaten fibers, in the filter
- a powdery filter aid that is used in general filters is used. you don't have to. Therefore, it is possible to efficiently and easily suppress the oxidative deterioration of the edible oil without using an auxiliary agent or the like. There is no need to recover the filter aid that has become a shape, and the working efficiency at the time of filtering the edible oil can be improved.
- the filter aid may be used as necessary, and the amount used can be reduced from the amount generally used.
- the filter according to the present embodiment is obtained by deliquoring and drying a suspension containing fibers, preferably beaten fibers, and a deterioration inhibitor.
- a suspension containing fibers preferably beaten fibers
- a deterioration inhibitor In addition to containing particles containing degradation inhibitors retained in the branches, degradation inhibitors are also present both within and on the surface of the fiber when the degradation inhibitor is in a dissolved state. It is possible to further obtain the effect of suppressing deterioration of edible oil.
- Natural fibers are fibers made from natural substances.
- the types of natural fibers are not particularly limited, and examples thereof include wood pulp, cotton, wool fibers, hemp, and silk.
- artificial fibers described later may be used alone or in combination. preferable.
- the main component refers to a state in which the amount of natural fibers used is more than 50% by mass, preferably more than 60% by mass, more preferably 70% by mass, relative to the total mass of fibers used when manufacturing the filter. % by mass.
- regenerated fibers include rayon and the like.
- synthetic resin fibers include polyester resin fibers, polyolefin resin fibers (eg, polyethylene fibers, polypropylene fibers), polyamide resin fibers (eg, polyamide 66 fibers), vinyl resin fibers, acrylic resin fibers, polyurethane resin fibers, and the like. All of these fibers become fluffed by beating, and the branches can hold the particulate deterioration inhibitor, so that the deterioration inhibitor can be prevented from falling off, and an effect of suppressing the deterioration of the edible oil can be obtained.
- the average fiber length and average fiber diameter are not particularly limited regardless of whether the fibers to be used are natural fibers or artificial fibers. 005 to 0.1 mm is preferably used.
- other fibers may be included in addition to the above natural fibers and artificial fibers.
- Other fibers include metal fibers, glass fibers, carbon fibers, and the like.
- the deterioration suppressing agent used in the filter according to the present embodiment has the effect of suppressing the deterioration of the edible oil by coming into contact with the edible oil.
- deterioration inhibitors include carbonates such as calcium carbonate and magnesium carbonate, silicates such as calcium silicate and magnesium silicate, tartrates such as potassium hydrogen tartrate, oxides such as magnesium oxide, calcium oxide and aluminum oxide, It is preferable to use at least one selected from hydroxides such as magnesium hydroxide and calcium hydroxide, alginates such as calcium alginate, and phosphates such as trimagnesium phosphate. Among them, it is more preferable to use at least one selected from tartrates, oxides and hydroxides.
- the deterioration inhibitor may be chemically synthesized during the manufacturing process.
- calcium oxide reacts with water, which is the solvent of the aqueous suspension, to synthesize calcium hydroxide, which may exist in the filter as calcium hydroxide.
- the weight of the deterioration inhibitor with respect to the total weight of the filter is preferably 1% by mass or more, and preferably 80% by mass or less.
- the mass of the deterioration suppressing agent is 1% by mass or more with respect to the total mass of the filter, the effect of suppressing the deterioration of cooking oil can be obtained.
- the weight of the deterioration inhibitor is 80% by mass or less with respect to the total weight of the filter, it is possible to obtain the effect of preventing the deterioration inhibitor from coming off.
- the total amount is within the above numerical range.
- the weight of the deterioration inhibitor with respect to the total weight of the filter is more preferably 60% by mass or less, and even more preferably 50% by mass or less.
- the mass of the deterioration inhibitor with respect to the total mass of the filter is determined by, for example, washing the filter with a liquid that dissolves the deterioration inhibitor without dissolving the fiber, and dissolving and removing the deterioration inhibitor present on the surface and inside of the fiber. After that, the fiber part is dried and the weight difference is measured.
- deterioration can also be determined by washing the filter with a liquid that dissolves the fibers without dissolving the deterioration inhibitor, dissolving and removing the fibers, drying the deterioration inhibitor portion, and measuring the difference in mass.
- the mass of inhibitor can be calculated.
- the mass of the deterioration suppressing agent can also be calculated by burning the organic matter to decompose and remove it and measuring the ash content.
- Alkaline earth metal oxide when an oxide is used as the deterioration inhibitor, an alkaline earth metal oxide can be used, for example.
- Alkaline earth metals include four elements of calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra), as well as beryllium (Be) and magnesium (Mg).
- alkaline earth metal oxides may be used alone, alkaline earth metal oxides and other deterioration inhibitors may be used in combination.
- Other deterioration inhibitors include hydroxides such as magnesium hydroxide and calcium hydroxide, carbonates such as calcium carbonate and magnesium carbonate, silicates such as calcium silicate and magnesium silicate, and tartaric acid such as potassium hydrogen tartrate. salts, alginates such as calcium alginate, and phosphates such as trimagnesium phosphate, which can be used alone or in combination of two or more.
- a hydration reaction retardant is used in combination as an agent that functions to delay the hydration reaction.
- Sugar alcohol is used as a specific hydration reaction retardant.
- erythritol glycerin
- lactitol maltitol
- mannitol xylitol
- sorbitol sorbitol
- the sugar alcohol having a molecular weight of 500 or less is more preferable, and one having a molecular weight of 250 or less is particularly preferable. If the molecular weight of the sugar alcohol is 500 or less, it dissolves satisfactorily in water, which is the dispersion medium, so that the effect of delaying the hydration reaction is enhanced.
- an aqueous suspension in consideration of environmental conservation, but oxides such as alkaline earth metal oxides are poorly soluble in water, so they are attached to the fibers in granular form. While remaining in the filter, the sugar alcohol is water soluble and is removed from the filter along with the water during deliquoring of the aqueous suspension. However, although the amount of sugar alcohol is very small, it adheres to oxides and fibers and remains in the filter. The amount of sugar alcohol remaining on this filter is the so-called "trace amount”.
- the sugar alcohol remaining in the filter has the effect of suppressing the hydration reaction between the moisture in the air, the minute amount of moisture contained in the cooking oil, and the oxide.
- the residual amount of sugar alcohol in the filter is preferably 10 ppm or more, more preferably 50 ppm or more, per 1 g of the food oil deterioration suppression filter.
- At least one selected from organic acid salts, sulfates, monosaccharides and disaccharides can also be used as a hydration reaction retardant.
- organic acid salts include citric acid, acetic acid, lactic acid, etc.; citrates such as calcium citrate, potassium citrate and sodium citrate; acetates such as calcium acetate, potassium acetate and sodium acetate; Lactate salts such as sodium lactate may be mentioned.
- Calcium sulfate etc. can be mentioned as a sulfate.
- Monosaccharides include glucose, fructose, mannose, galactose and the like.
- Sucrose etc. can be mentioned as a disaccharide. These may be used alone, or may be used in combination. Among them, it is particularly preferable to use at least one selected from citric acid, calcium sulfate, and sucrose, since the effect of suppressing hydration reaction is higher.
- the molecular weight of these is more preferably 500 or less, particularly preferably 400 or less. If these molecular weights are 500 or less, they are well dissolved in water, which is the dispersion medium, so that the effect of delaying the hydration reaction is enhanced.
- the residual amount of the hydration reaction retardant in the filter is preferably 10 ppm or more, more preferably 50 ppm or more, per 1 g of the food oil deterioration suppression filter.
- the filter according to the present embodiment may use an adsorbent having decolorizing and deodorizing effects in addition to the deterioration suppressing agent and the hydration reaction suppressing agent.
- the adsorbent it is preferable to use at least one selected from silicon dioxide, natural clay, artificial synthetic clay and activated carbon. Even when an adsorbent is used, the branched portions of the beaten fibers can retain the adsorbent, preventing the additive from being mixed into the filtered edible oil. , excellent decolorization and deodorization effect can be obtained.
- the edible oil deterioration suppression filter first comprises (1) fibers, preferably beaten fibers, (2) deterioration inhibitors, and (3) other deterioration inhibitors and adsorbents as necessary. are added to a suitable solvent to obtain a suspension in which they are mixed.
- a suitable solvent water can be selected when using natural fibers, and a liquid suitable for beating the fibers used can be selected when using artificial fibers.
- the suspension is preferably an aqueous suspension in consideration of environmental conservation, but when using an oxide as a deterioration inhibitor, a hydration reaction retarder is used in combination.
- the hydration reaction retarder may be put into water at the same time as the deterioration inhibitor, but it is better to dissolve the hydration reaction retarder in water sufficiently before putting the deterioration inhibitor into the water. deactivation can be suppressed more effectively, which is preferable.
- the fiber when obtaining a suspension, the fiber is put into water together with the above-mentioned components (2) and (3), and a beater such as a refiner or beater, or a dissolver or homomixer is used.
- a beater such as a refiner or beater, or a dissolver or homomixer is used.
- chemicals commonly used in the manufacture of filters such as paper strength agents, retention aids, pH adjusters and fixing agents, may be added to the suspension.
- the amount of these additives is not particularly limited as long as it does not affect the human body.
- the suspension is drained and dried to obtain a filter in which the particles containing the deterioration inhibitor are retained in the fibers.
- the deliquoring may be carried out by evaporating water or by filtration (papermaking).
- the deterioration inhibitor is held by the fibers without using a binder or the like, it is possible to efficiently prevent the deterioration of the edible oil, and the deterioration inhibitor falls off. can be easily manufactured.
- the process for manufacturing the filter medium and the process for attaching the additive can be performed in one process, it is possible to suppress the increase in manufacturing costs and reduce the environmental load required for manufacturing. It can suppress the increase of matter and energy.
- the hydration reaction retarder is added to the aqueous suspension, the oxide undergoes a hydration reaction, and the deterioration inhibiting function is deactivated. can be effectively suppressed.
- the content of the hydration reaction retardant in the suspension may be adjusted.
- the content of the hydration reaction retardant in the suspension is 0.01% by mass or more, preferably 0.05% by mass or more.
- ⁇ Solution containing deterioration inhibitor As the deterioration inhibitor used in the present embodiment, one that dissolves in a solvent other than water can also be used.
- the solution penetrates into the interior of the fibers, and the subsequent deliquoring and drying steps produce fine particles containing the deterioration inhibitor. is considered to precipitate inside the fiber.
- the solution containing the deterioration inhibitor dissolves the deterioration inhibitor and contains particles containing the deterioration inhibitor.
- Cotton fibers were used as natural fibers, calcium oxide and potassium hydrogen tartrate were used as deterioration inhibitors, and activated carbon was used as an adsorbent. These were put into water and beaten with a mixer. The cotton fiber was 70% by mass, the calcium oxide was 10% by mass, the potassium hydrogen tartrate was 10% by mass, and the activated carbon was 10% by mass with respect to the total mass of materials other than water.
- FIG. 1 is a drawing-substituting photograph showing the surface of the cooking oil deterioration suppression filter according to the present embodiment.
- FIG. 2 is a drawing substitute photograph which shows the cross section of the cooking-oil deterioration suppression filter which concerns on a present Example.
- the upper part of FIG. 2 shows the surface layer part in a filter cross section, and the lower part shows the intermediate layer part.
- the cotton fibers 10 are beaten to form branch-like portions 12 branched from the stem-like portion 11 . Since the branch-like portion 12 is much thinner than the stem-like portion 11, the particulate deterioration inhibitor 13 is entangled with the branch-like portion 12 and held. Regardless of the particle diameter of the deterioration inhibitor 13 and the position of the surface layer, middle layer, etc., the deterioration inhibitor 13 is securely held by the branch-like portions 12, and the deterioration inhibitor 13 can be removed from the filter without using a binder or the like. It is possible to prevent falling off.
- FIG. 3 is a schematic diagram showing an example of a cooking oil filtering device to which the cooking oil deterioration suppressing filter according to the present embodiment can be applied.
- the filtering device 25 includes an oil tank 21 in which the edible oil 20 is stored, an annular pipe 22 through which the edible oil 20 is passed, a pump 24 that feeds the edible oil 20, and a filter and oxidative deterioration suppression of the edible oil 20. and a processing unit 23 loaded with a filter for suppressing deterioration of cooking oil that performs
- the oil tank 21 , the pump 24 and the processing section 23 are connected in series with an annular pipe 22 .
- the edible oil 20 in the oil tank 21 is sent through the pipe 22 by the pump 24, filtered in the processing unit 23 and suppressed from oxidative deterioration, and then returned to the oil tank 21.
- the used cooking oil 20 is oxidized and deteriorated in addition to containing impurities such as fried dregs. As well as being filtered, oxidative deterioration of the edible oil 20 is suppressed, and the oxidation rate slows down.
- the edible oil degradation suppression filter deteriorates in its oxidation degradation suppression performance, when its filterability is lowered, or when it becomes clogged and does not pass liquid, the edible oil degradation suppression filter in the processing unit 23 is replaced with a new one.
- an ordinary fried dregs collection filter or the like can be further installed in front of the edible oil deterioration suppression filter in the flow path.
- the edible oil deterioration suppression filter according to the present embodiment is not limited to application to the filtering device 25 described above, and can be applied to various filtering devices and filters.
- Example 2 Cellulose fibers were used as natural fibers, calcium tartrate and potassium hydrogen tartrate were used as deterioration inhibitors, and activated carbon was used as an adsorbent. These were put into water and beaten with a mixer. Calcium oxide was 10% by mass, potassium hydrogen tartrate was 10% by mass, activated carbon was 10% by mass, and cellulose fiber was 70% by mass with respect to the total mass of materials other than water. After that, it was dehydrated by filtration and dried to obtain the edible oil deterioration suppressing filter according to the present example.
- a disk having a diameter of 90 mm and a thickness of 2.8 mm was cut from the produced filter for suppressing deterioration of cooking oil, and a test piece A was obtained.
- the density of the test piece A was 0.28 g/cm 3 .
- Example 2 A disk having a diameter of 90 mm and a thickness of 0.6 mm was cut from the same filter for suppressing deterioration of cooking oil as in Example 1, and a test piece B was obtained. Incidentally, the density of the test piece B was 0.43 g/cm 3 .
- test piece C A disk having a diameter of 90 mm and a thickness of 1.0 mm was cut from a cellulose filter paper to obtain a test piece C. Incidentally, the density of the test piece C was 0.38 g/cm 3 .
- the treatment unit 23 of the filtration device 25 is loaded with one of the filters of the test pieces A to C, and 4 L of commercially available rapeseed oil is added as the edible oil 20 to the oil tank 21, and the pump is maintained at 180 ° C. 24, the liquid was sent and circulated, and the filters (specimen A to C) of the processing unit 23 performed filtration.
- the oil in the oil tank was kept at 180°C.
- the edible oil 20 was sampled and the acid value was measured.
- the acid value of the edible oil 20 was measured using a potentiometric titration method (end point: pH 12) in accordance with JIS K2501. The results are shown below.
- the oxidation suppressing performance is shown as a relative value with the acid value of the comparative example being 1.
- the edible oil degradation suppression filter according to the present invention is significantly superior in oxidation suppression performance compared to the case of fibers alone.
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Abstract
Description
例えば、特許文献1には、食用油用浄化剤として酒石酸塩を使用し、食用油にそのまま浄化剤を添加する方法が挙げられている。なお、特許文献1には、例えば酒石酸水素カリウム塩を紙で挟み、紙の周縁を閉じて袋状としたフィルタについても記載されている。
また、特許文献2には、濾材の表面及び細孔の内面の少なくとも一方もしくは両方に、バインダにより食用油劣化抑制剤を付着させたフィルタが開示されている。
さらに、特許文献3には、パルプなどの繊維と、活性炭粉末などの吸着剤とを水中で撹拌混合し、圧縮成形により脱水することにより得られる食用油ろ過用フィルタが記載されている。
また本発明は、優れた劣化抑制機能を有する食用油劣化抑制フィルタを容易に製造することができるとともに、製造時における環境負荷物質の生成を抑制することができ、これにより地球環境保全を実現することができる食用油劣化抑制フィルタの製造方法を提供することを目的とする。
この日本国特願2021-121669では、食用油劣化抑制フィルタの製造方法として、「抄紙法(紙漉き)」とも称される、フィルタ基材である繊維と、劣化抑制剤とを水に加えて拡散混合して水性懸濁液を調製し、この水性懸濁液を脱水及び乾燥させる方法を提案している。この製造方法によれば、バインダ等を使用することなく、劣化抑制剤が繊維によって保持されているため、効率的に食用油の劣化を防止することができるとともに、劣化抑制剤の脱落が防止されたフィルタを容易に製造することができる。また、濾材を製造するための工程と、添加剤を付着させるための工程とが、1つの工程で実施できるため、製造コストの上昇を抑制することができるとともに、製造に必要とされる環境負荷物質やエネルギーの増加を抑制することができる。更には、水を分散媒とすることから、地球環境保全にも寄与している。
MO+H2O→M(OH)2・・・(1) ただし、Mはアルカリ土類金属
炭酸塩、ケイ酸塩、酒石酸塩、酸化物、水酸化物、アルギン酸塩及びリン酸塩から選択された少なくとも1種の劣化抑制剤と、
を有する、食用油劣化抑制フィルタ。
[3] 前記劣化抑制剤が酸化物であり、かつ、更に、糖アルコールからなる水和反応遅延剤を有する、[2]に記載の食用油劣化抑制フィルタ。
[4] 前記糖アルコールは、エリスリトール、グリセリン、ラクチトール、マルチトール、マンニトール、キシリトール及びソルビトールから選択された少なくとも1種である、[3]に記載の食用油劣化抑制フィルタ。
[5] 前記糖アルコールは、グリセリン及びソルビトールのいずれか一方又は両方である、[4]に記載の食用油劣化抑制フィルタ。
[6] 前記糖アルコールの分子量が500以下である、[3]~[5]のいずれか1つに記載の食用油劣化抑制フィルタ。
[7] 前記劣化抑制剤が酸化物であり、かつ、更に、有機酸塩、硫酸塩、単糖類及び二糖類から選択される少なくとも1種の水和反応遅延剤を有する、[2]に記載の食用油劣化抑制フィルタ。
[8] 前記水和反応遅延剤は、クエン酸、硫酸カルシウム及びスクロースから選択された少なくとも1種を含む、[7]に記載の食用油劣化抑制フィルタ。
[9] 前記水和反応遅延剤の分子量が500以下である、[7]又は[8]に記載の食用油劣化抑制フィルタ。
[10] 前記水和反応遅延剤を痕跡量含む、[3]~[9]のいずれか1つに記載の食用油劣化抑制フィルタ。
[11] 前記水和反応遅延剤を前記食用油劣化抑制フィルタ1g当たり10ppm以上含む、[10]に記載の食用油劣化抑制フィルタ。
[12] 前記繊維は、叩解された繊維を含む、[1]~[11]のいずれか1つに記載の食用油劣化抑制フィルタ。
[13] 前記繊維は、幹状部と、叩解により前記幹状部から分岐した枝状部と、を有し、
前記枝状部が前記劣化抑制剤を含有する粒子を保持している、[12]に記載の食用油劣化抑制フィルタ。
[14] 前記繊維は、天然繊維及び人造繊維のいずれか一方又は両方である、[12]又は[13]に記載の食用油劣化抑制フィルタ。
[15] 前記人造繊維は、再生繊維及び合成樹脂繊維のいずれか一方又は両方である、[14]に記載の食用油劣化抑制フィルタ。
[16] 前記繊維の内部及び表面の両方に、前記劣化抑制剤が存在する、[1]~[15]のいずれか1つに記載の食用油劣化抑制フィルタ。
[17] さらに、吸着剤を含む、[1]~[16]のいずれか1つに記載の食用油劣化抑制フィルタ。
[18] 前記吸着剤は、二酸化ケイ素、天然粘土、人工合成粘土及び活性炭から選択された少なくとも1種を含む、[17]に記載の食用油劣化抑制フィルタ。
前記繊維と、前記劣化抑制剤とを含む懸濁液を得る工程と、
前記懸濁液を脱液し、乾燥させる工程と、
を有する、食用油劣化抑制フィルタの製造方法。
また、本発明の製造方法によれば、優れた劣化抑制機能を有する食用油劣化抑制フィルタを容易に製造することができる。また、製造時における環境負荷物質の生成を抑制することができ、これにより、地球環境保全を実現することができる。
また、本発明によれば、地球環境保全を考慮して、食用油劣化抑制フィルタの製造時における懸濁液を得る工程において使用する液体として水を用いる場合においても、十分な劣化抑制機能の失活を抑制することができる食用油劣化抑制フィルタ及びその製造方法を提供することができる。
本実施形態に係る食用油劣化抑制フィルタは、繊維と、劣化抑制剤と、を有する。以下に、本実施形態に係る食用油劣化抑制フィルタに使用することができる繊維及び劣化抑制剤について、詳細に説明する。
フィルタの材料として使用される繊維としては、天然繊維及び人造繊維のいずれか一方又は両方を用いることができる。これらの繊維は、そのまま使用することもできるが、叩解されていることが好ましい。フィルタの材料となる繊維として、叩解された繊維を用いることにより、劣化抑制剤の保持力を大幅に向上させることができる。なお、叩解されることによって毛羽立ち、幹状部と、幹状部から分岐した枝状部とが形成される。
枝状部は幹状部よりも細く、製造工程において、液中で枝状部が粒子状の劣化抑制剤に絡まるため、劣化抑制剤を強固に保持することができる。したがって、本実施形態のフィルタを用いて、使用済みの食用油を濾過した場合に、劣化抑制剤の脱落を防止することができ、濾過後の食用油に劣化抑制剤が混入することを防止することができる。
なお、本実施形態における食用油劣化抑制フィルタにおいて、劣化抑制剤を十分に保持する効果を得るためには、上記枝状部の直径は、幹状部の直径の50%以下であることが好ましく、40%以下であることがより好ましく、30%以下であることがさらに好ましい。
なお、「叩解された繊維」とは、離解された繊維を含む。
なお、濾過助剤は、必要に応じて使用してもよく、一般的に用いられている使用量よりも減少させることもできる。
天然繊維とは、天然の物質から製造された繊維のことである。天然繊維の種類は特に限定されるものではなく、例えば、木材パルプ、木綿、羊毛繊維、麻、絹等が挙げられる。本実施形態においては、天然繊維を単独で使用する他、後述する人造繊維を単独で使用しても、両方を使用してもよいが、毛羽立ちが良好である天然繊維を主成分とすることが好ましい。なお、主成分とは、フィルタを製造する際に使用する繊維の全質量に対して、天然繊維の使用量が50質量%超である状態をいい、好ましくは60質量%超、より好ましくは70質量%超である。
人造繊維を使用する場合には、再生繊維及び合成樹脂繊維から選択された少なくとも1種を使用することができる。再生繊維の例としては、レーヨン等が挙げられる。合成樹脂繊維の例としては、ポリエステル樹脂繊維、ポリオレフィン樹脂繊維(例えばポリエチレン繊維、ポリプロピレン繊維)、ポリアミド樹脂繊維(例えばポリアミド66繊維)、ビニル樹脂繊維、アクリル樹脂繊維、ポリウレタン樹脂繊維等が挙げられる。これらの繊維はいずれも、叩解により毛羽立ち、枝状部が粒子状の劣化抑制剤を保持することができるため、劣化抑制剤が脱落することなく、食用油の劣化抑制効果を得ることができる。
本実施形態においては、上記天然繊維及び人造繊維の他に、他の繊維が含まれていてもよい。他の繊維としては、金属繊維、ガラス繊維、炭素繊維等が挙げられる。
本実施形態に係るフィルタに使用される劣化抑制剤は、食用油と接触することにより食用油の劣化を抑制する効果を有するものである。劣化抑制剤としては、炭酸カルシウム、炭酸マグネシウム等の炭酸塩、ケイ酸カルシウム、ケイ酸マグネシウム等のケイ酸塩、酒石酸水素カリウム等の酒石酸塩、酸化マグネシウム、酸化カルシウム、酸化アルミニウム等の酸化物、水酸化マグネシウム、水酸化カルシウム等の水酸化物、アルギン酸カルシウム等のアルギン酸塩、及びリン酸三マグネシウム等のリン酸塩から選択された少なくとも1種を使用することが好ましい。
中でも、酒石酸塩、酸化物及び水酸化物から選択された少なくとも1種を使用することがより好ましい。
フィルタ全質量に対する劣化抑制剤の質量は、60質量%以下であることがより好ましく、50質量%以下であることがさらに好ましい。
また、劣化抑制剤を溶解させず、繊維を溶解させる液体でフィルタを洗浄し、繊維を溶解させて除去した後、劣化抑制剤の部分を乾燥させて、質量差を測定することによっても、劣化抑制剤の質量を算出することができる。
さらに、有機物を燃焼させて分解除去し、灰分を測定することによっても、劣化抑制剤の質量を算出することができる。
上記のとおり、劣化抑制剤としてのアルカリ土類金属酸化物などの酸化物は、水和反応を起こしてしまい、十分な劣化抑制機能が失活するおそれがある。そこで、水和反応を遅らせる働きをするものとして、水和反応遅延剤を併用する。なお、具体的な水和反応遅延剤としては、糖アルコールが用いられる。
本実施形態に係るフィルタは、上記劣化抑制剤や水和反応抑制剤の他に、脱色、脱臭効果を有する吸着剤を使用してもよい。吸着剤としては、二酸化ケイ素、天然粘土、人工合成粘土及び活性炭から選択された少なくとも1種を使用することが好ましい。
なお、吸着剤を用いた場合であっても、叩解された繊維の枝状部が吸着剤を保持することができ、濾過後の食用油に添加剤が混入することを防止することができるとともに、優れた脱色及び脱臭効果を得ることができる。
本実施形態に係る食用油劣化抑制フィルタは、まず、(1)繊維、好ましくは叩解された繊維と、(2)劣化抑制剤と、(3)必要に応じて他の劣化抑制剤や吸着剤を、適当な溶媒に投入して、これらが混合した懸濁液を得る。溶媒には、天然繊維を用いる場合は水を選択することができ、人造繊維を用いる場合は使用する繊維の叩解に適した液体を選択することができる。
なお、脱液には、水を蒸発させてもよし、濾過(抄紙)により脱水させてもよい。
また、濾材を製造するための工程と、添加剤を付着させるための工程とが、1つの工程で実施できるため、製造コストの上昇を抑制することができるとともに、製造に必要とされる環境負荷物質やエネルギーの増加を抑制することができる。
さらに、劣化抑制剤として酸化物を用いる場合、水和反応遅延剤が水性懸濁液中に投入されるため、酸化物が水和反応を起こして、劣化抑制機能が失活してしまうことを効果的に抑制できる。
本実施形態において用いられる劣化抑制剤は、水以外の溶媒に溶解するものも使用することができる。上記製造方法において、叩解された繊維と劣化抑制剤が溶解した溶液とが混合されると、繊維の内部に溶液が染み込み、その後の脱液及び乾燥工程により、劣化抑制剤を含有する微細な粒子が繊維の内部に析出すると考えられる。
また、叩解された繊維と劣化抑制剤を含む溶液とを混合する段階において、溶液中に劣化抑制剤を含有する粒子が含まれていると、すなわち、粒子の状態で溶液中に存在すると、繊維の枝状部に粒子が絡まりやすくなる。これらのことから、劣化抑制剤を含む溶液は、劣化抑制剤が溶解しているとともに、劣化抑制剤を含有する粒子を含んでいることが好ましい。
天然繊維として、コットン繊維を使用し、劣化抑制剤として酸化カルシウム及び酒石酸水素カリウムを使用し、さらに吸着剤として活性炭を使用して、これらを水中に投入し、ミキサーにより叩解処理をした。なお、水以外の材料の全質量に対して、コットン繊維を70質量%、酸化カルシウムを10質量%、酒石酸水素カリウムを10質量%、活性炭を10質量%とした。
なお、劣化抑制剤13の粒径や、表層部、中層部等の位置にかかわらず、枝状部12により確実に保持されており、バインダ等を使用することなく、フィルタから劣化抑制剤13が脱落することを防止することができる。
また、白金蒸着させた繊維表面の元素分析を行った。その結果、同じく酒石酸水素カリウム由来のカリウム(K)が検出され、繊維に劣化抑制剤が存在していることを確認できた。
このことから,繊維に劣化抑制剤が染み込み,一層食用油の劣化を抑制する効果が得られるものと考えられる。
濾過装置25は、食用油20が貯留される油槽21と、食用油20が通液される環状の配管22と、食用油20を送液するポンプ24と、食用油20の濾過及び酸化劣化抑制を行う食用油劣化抑制フィルタが装填されている処理部23と、を備えている。なお、油槽21とポンプ24と処理部23とは、環状の配管22で直列に連結されている。
食用油劣化抑制フィルタの酸化劣化抑制性能が低下した場合、濾過性が低下した場合又は目詰まりし通液しなくなった場合は、処理部23内の食用油劣化抑制フィルタを新品と交換する。
また、流路内における食用油劣化抑制フィルタの前側に、更に通常の揚げカス捕集フィルタ等を設置することもできる。
(実施例1)
天然繊維としてセルロース繊維を使用し、劣化抑制剤として酒石酸カルシウム及び酒石酸水素カリウムを使用し、さらに吸着剤として活性炭を使用して、これらを水中に投入し、ミキサーにより叩解処理をした。なお、水以外の材料の全質量に対して、酸化カルシウムを10質量%、酒石酸水素カリウムを10質量%、活性炭を10質量%、セルロース繊維を70質量%とした。その後、濾過により脱水し、乾燥させることにより、本実施例に係る食用油劣化抑制フィルタを得た。
実施例1と同一の食用油劣化抑制フィルタから、直径90mm、厚さ0.6mmの円板を裁断し、試験片Bとした。なお、試験片Bの密度は、0.43g/cm3であった。
セルロース製の濾紙から、直径90mm、厚さ1.0mmの円板を裁断し、試験片Cとした。なお、試験片Cの密度は、0.38g/cm3であった。
試験片A~Cを用いて、酸化劣化抑制試験を行った。試験には、図3に示す、ろ過装置25を用いた。
80時間後に食用油20を採取し、酸価を測定した。食用油20の酸価は、JIS K2501に準拠して、電位差滴定法(終点:pH12)を用いて測定した。結果を下記に示す。なお、酸化抑制性能は、比較例の酸価を1とする相対値で示してある。
11 幹状部
12 枝状部
13 劣化抑制剤
20 食用油
21 油槽
22 配管
23 処理部
24 ポンプ
25 濾過装置
Claims (19)
- 繊維と、
炭酸塩、ケイ酸塩、酒石酸塩、酸化物、水酸化物、アルギン酸塩及びリン酸塩から選択された少なくとも1種の劣化抑制剤と、
を有する、食用油劣化抑制フィルタ。 - 前記劣化抑制剤が、酒石酸塩、酸化物及び水酸化物から選択された少なくとも1種である、請求項1に記載の食用油劣化抑制フィルタ。
- 前記劣化抑制剤が酸化物であり、かつ、更に、糖アルコールからなる水和反応遅延剤を有する、請求項2に記載の食用油劣化抑制フィルタ。
- 前記糖アルコールは、エリスリトール、グリセリン、ラクチトール、マルチトール、マンニトール、キシリトール及びソルビトールから選択された少なくとも1種である、請求項3に記載の食用油劣化抑制フィルタ。
- 前記糖アルコールは、グリセリン及びソルビトールのいずれか一方又は両方である、請求項4に記載の食用油劣化抑制フィルタ。
- 前記糖アルコールの分子量が500以下である、請求項3~5のいずれか1項に記載の食用油劣化抑制フィルタ。
- 前記劣化抑制剤が酸化物であり、かつ、更に、有機酸塩、硫酸塩、単糖類及び二糖類から選択される少なくとも1種の水和反応遅延剤を有する、請求項2に記載の食用油劣化抑制フィルタ。
- 前記水和反応遅延剤は、クエン酸、硫酸カルシウム及びスクロースから選択された少なくとも1種を含む、請求項7に記載の食用油劣化抑制フィルタ。
- 前記水和反応遅延剤の分子量が500以下である、請求項7または8に記載の食用油劣化抑制フィルタ。
- 前記水和反応遅延剤を痕跡量含む、請求項3~9のいずれか1項に記載の食用油劣化抑制フィルタ。
- 前記水和反応遅延剤を前記食用油劣化抑制フィルタ1g当たり10ppm以上含む、請求項10に記載の食用油劣化抑制フィルタ。
- 前記繊維は、叩解された繊維を含む、請求項1~11のいずれか1項に記載の食用油劣化抑制フィルタ。
- 前記繊維は、幹状部と、叩解により前記幹状部から分岐した枝状部と、を有し、
前記枝状部が前記劣化抑制剤を含有する粒子を保持している、請求項12に記載の食用油劣化抑制フィルタ。 - 前記繊維は、天然繊維及び人造繊維のいずれか一方又は両方である、請求項12または13に記載の食用油劣化抑制フィルタ。
- 前記人造繊維は、再生繊維及び合成樹脂繊維のいずれか一方又は両方である、請求項14に記載の食用油劣化抑制フィルタ。
- 前記繊維の内部及び表面の両方に、前記劣化抑制剤が存在する、請求項1~15のいずれか1項に記載の食用油劣化抑制フィルタ。
- さらに、吸着剤を含む、請求項1~16のいずれか1項に記載の食用油劣化抑制フィルタ。
- 前記吸着剤は、二酸化ケイ素、天然粘土、人工合成粘土及び活性炭から選択された少なくとも1種を含む、請求項17に記載の食用油劣化抑制フィルタ。
- 請求項1~18のいずれか1項に記載の食用油劣化抑制フィルタを製造する方法であって、
前記繊維と、前記劣化抑制剤とを含む懸濁液を得る工程と、
前記懸濁液を脱液し、乾燥させる工程と、
を有する、食用油劣化抑制フィルタの製造方法。
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