CN110578180A - Acidified modified cellulose fiber, preparation method thereof and application thereof in processing edible oil - Google Patents
Acidified modified cellulose fiber, preparation method thereof and application thereof in processing edible oil Download PDFInfo
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- CN110578180A CN110578180A CN201910931004.4A CN201910931004A CN110578180A CN 110578180 A CN110578180 A CN 110578180A CN 201910931004 A CN201910931004 A CN 201910931004A CN 110578180 A CN110578180 A CN 110578180A
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- modified cellulose
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- 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
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0015—Electro-spinning characterised by the initial state of the material
- D01D5/003—Electro-spinning characterised by the initial state of the material the material being a polymer solution or dispersion
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
- D01F2/24—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from cellulose derivatives
- D01F2/28—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from cellulose derivatives from organic cellulose esters or ethers, e.g. cellulose acetate
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- Textile Engineering (AREA)
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- General Chemical & Material Sciences (AREA)
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Abstract
The invention discloses an acidified modified cellulose fiber, a preparation method thereof and application thereof in processing edible oil. The acidified modified cellulose fiber is prepared by spinning by taking the acidified modified cellulose as a raw material, has good adsorption performance, and obviously improves the DBP removal rate when being used as an adsorbent for removing DBP from edible oil.
Description
Technical Field
the invention relates to the technical field of edible oil processing, in particular to an acidified modified cellulose fiber, a preparation method thereof and application thereof in edible oil processing.
Background
Phthalates (PAEs) are a common class of environmental hormone compounds and have become one of the most common pollutants worldwide in recent years. To avoid this, china, the united states, japan, and the european union, etc. list them as "priority control contaminants" and limit their addition amount in food contact materials. It has been found that PAEs present in vegetable fats and oils are dimethyl phthalate (DMP), diethyl phthalate (DEP), Dibutyl phthalate (DBP), butylbenzyl phthalate (BBP), di (2-ethyl) hexyl phthalate (Bis (2-ethylhexyl) phthalate, DEHP), and diisobutyl phthalate (DIBP), etc., as specified in the Ware-office supervision letters (2011) No. 551, phthalate esters DBP of 0.3mg/kg or less, DEHP of 1.5mg/kg or DINP of 9.0mg/kg in foods and food additives.
According to research reports, PEAs in drinking water or sewage can be partially removed by using the solid adsorbent, for example, 94% of DBP in drinking water can be removed by using an activated carbon-attapulgite composite filter material, and the solid adsorbent also has a certain removing effect on DMP, DEP and DEHP in water. For removing PAEs in vegetable oil, the currently adopted method mainly adopts activated carbon adsorption, steam distillation or molecular distillation, wherein the steam distillation or molecular distillation method has high requirement on removal temperature, the equipment investment is high, the production cost is higher, and dangers such as chloropropanol and the like can be generated in the oil at high temperature; compared with steam distillation or molecular distillation, the activated carbon adsorption method has the advantages of simple method and low requirement on temperature. However, the existing activated carbon adsorption method has poor removal effect on DBP (DBP) of a plasticizer component with a larger molecular weight in vegetable oil, and cannot reach the national standard limit regulation.
Disclosure of Invention
The invention mainly aims to provide an acidified modified cellulose fiber, a preparation method thereof and application thereof in edible oil processing, and aims to improve the DBP removal rate in the edible oil processing process.
In order to achieve the above object, an acidified modified cellulose fiber is provided, wherein the fiber derivative fiber comprises acidified modified cellulose, and the acidified modified cellulose comprises any one of cellulose acetate, cellulose diacetate and cellulose acetate butyrate.
Preferably, the cellulose acetate contains 40-42% of acetyl and has the viscosity of 3-6 s;
the cellulose diacetate contains 53-56% of acetyl and has a viscosity of 18-20 s;
The cellulose acetate-butyrate contains 13.5-17.5% of acetyl and 35.5-38% of butyryl, and the viscosity is 2-20 s.
In order to achieve the above object, the present invention also provides a method for preparing the acidified modified cellulose fiber, which comprises the following steps:
dissolving the acidified modified cellulose in an organic solvent to prepare a spinning solution, and then preparing the acidified modified cellulose fiber through electrostatic spinning.
preferably, the organic solvent is a mixed solvent of chloroform and acetone, and the volume ratio of chloroform to acetone in the mixed solvent is (3:1) - (1: 3).
Preferably, the mass concentration of the acidified modified cellulose in the spinning solution is 0.5-10%.
Preferably, the electrostatic spinning method comprises the following steps: and adding the spinning solution into an injector, extruding at a constant speed, and flying to a grounded aluminum collecting plate to prepare the acidified modified cellulose fiber, wherein a metal needle at the front end of the injector is connected with a high-voltage electrostatic source with the voltage of 15-25 kV, and the constant speed is 0.8-1.2 mL/h.
The invention also provides an application of the acidified modified cellulose fiber in edible oil processing, which comprises the following steps:
adding the acidified modified cellulose fiber into edible oil to be degreased, heating and stirring to enable the acidified modified cellulose fiber to absorb dibutyl phthalate in the edible oil, and separating and removing the acidified modified cellulose fiber to obtain the degreased edible oil.
Preferably, the method comprises the steps of adding the acidified modified cellulose fibers into the edible oil to be degreased, heating and stirring the mixture to enable the acidified modified cellulose fibers to adsorb dibutyl phthalate in the edible oil, and then separating and removing the acidified modified cellulose fibers to obtain the degreased edible oil, and specifically comprises the following steps:
Adding the acidified modified cellulose fiber into edible oil to be degreased, heating to 100-140 ℃, stirring for 20-50 min, and then centrifuging to separate the acidified modified cellulose fiber to obtain the degreased edible oil.
Preferably, the addition amount of the acidified modified cellulose fiber is 5-10% of the mass of the edible oil.
According to the technical scheme provided by the invention, cellulose acetate, cellulose diacetate or cellulose acetate-butyrate is used as a raw material, and the cellulose acetate, cellulose diacetate or cellulose acetate-butyrate is prepared into fiber derivative fibers through spinning, so that the cellulose acetate, cellulose diacetate or cellulose acetate-butyrate has good adsorption performance, and when the cellulose acetate, cellulose diacetate or cellulose acetate-butyrate is used as an adsorbent for removing DBP from edible oil, the DBP removal rate is obviously improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other related drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is an appearance view of edible oil with DBP removed according to application example 1 and comparative example 1.
Detailed Description
in order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
The existing method for removing PAEs in edible oil by using activated carbon adsorption has the advantages of simple method and low requirement on temperature, but has poor removal effect on DBP (diethylene glycol monobutyl ether) serving as a plasticizer component with higher molecular weight in vegetable oil, and cannot reach the national standard limit regulation. In order to solve the above problems, the present invention provides an acidified modified Cellulose fiber, which comprises acidified modified Cellulose as a component, that is, the acidified modified Cellulose is prepared from acidified modified Cellulose as a raw material by spinning, and has good adsorption performance, and when the acidified modified Cellulose is used as an adsorbent for removing DBP from edible oil, the removal rate of DBP is significantly improved, wherein the acidified modified Cellulose comprises any one of Cellulose Acetate (CA), Cellulose Diacetate (CDA) and Cellulose Acetate Butyrate (CAB).
according to the technical scheme provided by the invention, cellulose acetate, cellulose diacetate or cellulose acetate-butyrate is used as a raw material, and is prepared into the fiber derivative fiber through electrostatic spinning, so that the fiber derivative fiber has good adsorption performance, and when the fiber derivative fiber is used as an adsorbent for removing DBP from edible oil, the DBP removal rate is obviously improved.
The acetyl content of the acidified modified cellulose has great influence on the viscosity of a spinning solution prepared in the spinning process and the application temperature of the prepared fiber, when selecting, if the acetyl content is too low, the fiber prepared by electrostatic spinning can be partially dissolved at the heating temperature for removing DBP, and if the acetyl content is too high, when preparing the spinning solution, the acidified modified cellulose is difficult to dissolve, the time required for dissolving is long, or the heating treatment is required, so that the rapid preparation of the spinning solution is not facilitated. Therefore, in an embodiment provided by the present invention, the acidified modified cellulose is cellulose acetate, and the cellulose acetate has an acetyl content of 40 to 42% and a viscosity of 3 to 6 s; or the acidified modified cellulose is cellulose diacetate, the acetyl content of the cellulose diacetate is 53-56%, and the viscosity of the cellulose diacetate is 18-20 s; or the acidified modified cellulose is acetic acid-cellulose butyrate, the acetyl content of the acetic acid-cellulose butyrate is 13.5-17.5%, the butyryl content of the acetic acid-cellulose butyrate is 35.5-38%, and the viscosity of the acidified modified cellulose is 2-20 s. The acidified modified cellulose with the acetyl content in the range is used as a raw material for spinning, so that the spinning solution with the fully dissolved modified cellulose can be prepared quickly, the process time is saved, and the modified cellulose fiber can not be dissolved in the subsequent application.
The acidified modified cellulose fiber can be prepared by an electrospinning method which is conventional in the art, and generally, the electrospinning process generally comprises dissolving a high molecular polymer in a solvent to prepare a spinning solution, and then preparing the fiber by electrostatic jet spinning. On the basis, the invention also provides a preparation method of the acidified modified cellulose fiber, and in one embodiment of the preparation method of the acidified modified cellulose fiber, the preparation method of the acidified modified cellulose fiber comprises the following steps: dissolving the acidified modified cellulose in an organic solvent to prepare a spinning solution, and then preparing the acidified modified cellulose fiber through electrostatic spinning.
In the process of preparing the acidified modified cellulose into the spinning solution, there are various organic solvents for dissolving the acidified modified cellulose, for example, acetone, chloroform, acetone-methanol, etc., in this embodiment, the organic solvent is preferably a mixed solvent of chloroform and acetone, and the volume ratio of chloroform to acetone in the mixed solvent is (3:1) to (1: 3).
When the acidified modified cellulose is dissolved in a mixed solvent of chloroform and acetone to prepare the spinning solution, if the concentration of the acidified modified cellulose in the prepared spinning solution is too low, the acidified modified cellulose contained in the extruded spinning solution at a fixed time and a fixed base rate is too little, which is not beneficial to fiber forming and reduces the efficiency of preparing fibers by electrostatic spinning, and if the concentration of the acidified modified cellulose in the spinning solution is too high, not only is the acidified modified cellulose not fully dissolved during preparation, but also the prepared spinning solution has poor fluidity due to too high viscosity, and is easy to generate adverse conditions such as blockage of an extrusion die during electrostatic spinning. Therefore, in the preferred embodiment, the mass concentration of the acidified modified cellulose in the spinning solution is 0.5-10%, so that the spinning solution is easy to form during electrostatic spinning, the strength of the prepared fiber is high, the viscosity of the prepared spinning solution is appropriate, the flowability is good, and the problem that the extrusion die is blocked due to the overhigh viscosity of the spinning solution is avoided.
Electrostatic spinning is a special existing fiber manufacturing process, polymer solution or melt is subjected to jet spinning in a strong electric field, liquid drops at a needle head are changed into a conical shape (namely, a Taylor cone) under the action of the electric field, fiber filaments are obtained by extending from the tip of the conical shape, and electrostatic spinning equipment in the prior art can be adopted. In this embodiment, the electrostatic spinning method of the acidified modified cellulose fiber is provided, which includes the following steps: adding the spinning solution into an injector, extruding the spinning solution at a constant speed, and flying the spinning solution to a grounded aluminum collecting plate to prepare acidified modified cellulose fibers, wherein a metal needle at the front end of the injector is connected with a high-voltage electrostatic source with the voltage of 15-25 kV, and under the voltage condition, the spinning solution is extruded by the needle of the injector and then rapidly changed from spherical liquid drops into a conical shape, and a fiber filament is obtained by extending the conical tip; the constant rate is 0.8-1.2 mL/h, and the extrusion amount of the spinning solution is proper at the constant extrusion rate, so that the problem that the working efficiency of electrostatic spinning is reduced due to too small extrusion amount of the spinning solution can be avoided, and the problem that liquid drops extruded from an injector are easy to agglomerate when the extrusion amount of the spinning solution is too large can be avoided.
In this embodiment, the syringe is preferably a glass syringe, which facilitates observing the consumption of the spinning solution in the syringe at any time, the prepared spinning solution is added into the glass syringe and then extruded at a constant rate, a metal needle at the front end of the syringe is connected with a high-voltage electrostatic power source, after the high voltage is started, the spinning solution is continuously stretched in the process of flying to a grounded aluminum collecting plate under the action of an electrostatic field force, and meanwhile, the solvent in the spinning solution is rapidly volatilized in the process, so that the acidified modified cellulose fiber is prepared. Wherein the voltage of the high-voltage electrostatic source is preferably 20kV, and the constant rate of extrusion of the spinning solution is preferably 1 mL/h.
the invention further provides an application of the acidified modified cellulose fiber in processing edible oil, wherein the acidified modified cellulose fiber is used as an adsorbent to remove a high molecular weight phthalate plasticizer DBP in the edible oil, and the application comprises the following steps: adding the acidified modified cellulose fiber into edible oil to be degreased, heating and stirring to enable the acidified modified cellulose fiber to adsorb DBP in the edible oil, and separating and removing the acidified modified cellulose fiber to obtain the degreased edible oil. When the method is used for industrial production, equipment such as a reaction tank and the like can be used for heating and stirring so that the acidified modified cellulose fibers can thoroughly adsorb the DBP in the edible oil, and then an adsorbent (namely the acidified modified cellulose fibers) in the edible oil is separated by a conventional solid-liquid separation method such as filtration, centrifugation and the like, so that the edible oil with the DBP removed can be obtained.
When the acidified modified cellulose is used as an adsorbent to remove DBP in the edible oil, the heating and stirring temperature and time have certain influence on the DBP adsorption effect, the heating temperature is too low, the acidified modified cellulose fiber has poor adsorption on DBP, the time required for achieving a good adsorption effect is too long, the heating temperature is too high, and the negative influence is easily caused on the quality of the edible oil, so that the heating temperature is reduced as much as possible on the basis of achieving a good adsorption effect. In a preferred embodiment of the method for applying the acidified modified cellulose fiber to remove DBP from edible oil provided by the present invention, the method comprises the following steps: adding the acidified modified cellulose fiber into edible oil to be degreased, heating to 100-140 ℃, stirring for 20-50 min, and then centrifuging to separate the acidified modified cellulose fiber to obtain the degreased edible oil. Stirring for 20-50 min at the temperature of 100-140 ℃, so that the DBP removal rate in the edible oil can reach 55-65%, and performing solid-liquid separation in a centrifugal mode has higher solid-liquid separation rate and is simple and convenient to operate. In this embodiment, in a specific operation, the edible oil is centrifuged at 400 to 500rpm for 25 to 35min to completely separate the adsorbent from the edible oil, so as to obtain the purified oil.
when the acidified modified cellulose is used as an adsorbent for removing DBP in the edible oil, the addition amount of the acidified modified cellulose is too low to achieve an effect of effectively removing DBP, on the basis that DBP can be effectively removed, if the addition amount is too low, the adsorbent is unnecessary and wasted, and after adsorption is completed, the addition amount is too much to facilitate thorough separation from the edible oil. In the preferred embodiment, the addition amount of the acidified modified cellulose fiber is 5-10% of the edible oil, and within the addition range, the acidified modified cellulose fiber can not only achieve an excellent DBP removing effect in the edible oil, but also be easily separated from the edible oil, and can be completely separated and removed only through one-time centrifugal treatment.
The method for removing DBP in the edible oil has the advantages of high DBP removal rate, simple process, low requirement on equipment, lower operation temperature and capability of avoiding the problem of generating hazards in the edible oil due to high temperature.
The technical solutions of the present invention are further described in detail below with reference to specific examples and drawings, it should be understood that the following examples are merely illustrative of the present invention and are not intended to limit the present invention.
Example 1
(1) Dissolving cellulose acetate with acetyl content of 40% in a mixed solvent of chloroform and acetone in a volume ratio of 1:2 to prepare a spinning solution with the cellulose acetate concentration of 10% for later use;
(2) and adding the spinning solution into a glass syringe, connecting a metal needle at the front end of the syringe with a high-voltage electrostatic source, and extruding the spinning solution at a constant speed of 1mL/h by using a syringe pump to prepare the acidified modified cellulose fiber.
Example 2
(1) Dissolving cellulose diacetate with acetyl content of 53% in a mixed solvent with the volume ratio of chloroform to acetone being 1:3 to prepare a spinning solution with the cellulose diacetate concentration of 8% for later use;
(2) And adding the spinning solution into a glass syringe, connecting a metal needle at the front end of the syringe with a high-voltage electrostatic source, and extruding the spinning solution at a constant speed of 0.8mL/h by using a syringe pump to prepare the acidified modified cellulose fiber.
Example 3
(1) Dissolving cellulose acetate-butyrate with acetyl content of 14.5% and butyryl content of 35.5% in a mixed solvent with a volume ratio of chloroform to acetone of 1:1 to prepare a spinning solution with the cellulose acetate-butyrate concentration of 5% for later use;
(2) And adding the spinning solution into a glass syringe, connecting a metal needle at the front end of the syringe with a high-voltage electrostatic source, and extruding the spinning solution at a constant speed of 1.2mL/h by using a syringe pump to prepare the acidified modified cellulose fiber.
Example 4
(1) Dissolving cellulose acetate with acetyl content of 42% in a mixed solvent of chloroform and acetone in a volume ratio of 1:1 to prepare a spinning solution with the cellulose acetate concentration of 1% for later use;
(2) And adding the spinning solution into a glass syringe, connecting a metal needle at the front end of the syringe with a high-voltage electrostatic source, and extruding the spinning solution at a constant speed of 1mL/h by using a syringe pump to prepare the acidified modified cellulose fiber.
Application example 1
Taking 1kg of edible oil containing 0.06mg of DBP, adding 50g of the acidified modified cellulose fiber prepared in the example 1, heating and stirring at 130 ℃ for 30min, centrifuging at 450rpm for 30min, and removing precipitates to obtain the edible oil without DBP.
Application example 2
Taking 1kg of edible oil containing 0.06mg of DBP, adding 60g of the acidified modified cellulose fiber prepared in the example 2, heating and stirring at 110 ℃ for 20min, centrifuging at the rotating speed of 400rpm for 35min, and removing precipitates to obtain the edible oil without DBP.
Application example 3
1kg of edible oil containing 0.06mg of DBP is taken, 80g of the acidified modified cellulose fiber prepared in the example 3 is added into the edible oil, the mixture is heated and stirred at the temperature of 140 ℃ for 40min, and then the mixture is centrifuged at the rotating speed of 500rpm for 25min, and precipitates are removed, so that the edible oil without DBP is obtained.
Application example 4
1kg of edible oil containing 0.06mg of DBP was taken, 70g of the acidified modified cellulose fiber prepared in example 4 was added thereto, heated and stirred at 120 ℃ for 50min, and then filtered to remove the precipitate, thereby obtaining DBP-removed edible oil.
Comparative example 1
same as in application example 1 except that the acidified modified cellulose fibers were replaced with activated carbon.
Comparative example 2
same as in application example 2, except that the acidified modified cellulose fibers were replaced with activated carbon.
Comparative example 3
Same as in application example 3, except that the acidified modified cellulose fibers were replaced with activated carbon.
Comparative example 4
Same as in application example 4, except that the acidified modified cellulose fibers were replaced with activated carbon.
The content of DBP in the edible oil from which DBP was removed in application examples 1 to 4 and comparative examples 1 to 4 was measured by gas chromatography, and the removal rate of DBP was calculated, and the calculation results are shown in table 1 below.
TABLE 1 edible oil DBP removal rate in each application example and comparative example
From the results in table 1, when the addition amount and the treatment conditions of the adsorbent are the same, compared with the case of using activated carbon as the adsorbent, when the acidified modified cellulose fiber prepared in the embodiment of the present invention is used as the adsorbent for removing DBP in the edible oil, the removal rate of DBP in the edible oil is higher, and the adsorbent can satisfy the relevant standard regulation (the regulation in the supervision and administration letters (2011) 551), the content of phthalate ester substances DBP in foods and food additives is less than or equal to 0.3 mg/kg); moreover, the acidified modified cellulose fiber is easier to be completely removed by centrifugation or filtration than activated carbon, so that the edible oil after DBP removal is clear and transparent without adsorbent residue, and fig. 1 shows the appearance of the edible oil after DBP removal in application example 1 and comparative example 1. As can be seen from the comparison in fig. 1, the edible oil without DBP in application example 1 is clear and transparent, has no residue of the modified cellulose fiber, and still maintains the original color of the edible oil; in comparative example 1, a small amount of activated carbon which could not be completely separated and removed remained in the edible oil after the removal of DBP, and the color of the oil was also deepened.
From the above results, it can be seen that the acidified modified cellulose fiber prepared in the examples of the present invention is used as an adsorbent for removing DBP from edible oil, which not only improves the removal rate of DBP, but also facilitates thorough separation from edible oil, and does not change the color of edible oil.
The above is only a preferred embodiment of the present invention, and it is not intended to limit the scope of the invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall be included in the scope of the present invention.
Claims (8)
1. The acidified modified cellulose fiber is characterized in that the acidified modified cellulose fiber comprises acidified modified cellulose, and the acidified modified cellulose comprises any one of cellulose acetate, cellulose diacetate and cellulose acetate-butyrate.
2. The acidified modified cellulose fiber of claim 1, wherein the cellulose acetate comprises 40 to 42% acetyl groups and has a viscosity of 3 to 6 seconds;
The cellulose diacetate contains 53-56% of acetyl and has a viscosity of 18-20 s;
the cellulose acetate-butyrate contains 13.5-17.5% of acetyl and 35.5-38% of butyryl, and the viscosity is 2-20 s.
3. A process for the preparation of acidified modified cellulose fibres according to claim 1 or 2, characterised by the steps of:
Dissolving the acidified modified cellulose in an organic solvent to prepare a spinning solution, and then preparing the acidified modified cellulose fiber through electrostatic spinning.
4. The method for producing acidified modified cellulose fibers according to claim 3, wherein the organic solvent is a mixed solvent of chloroform and acetone, and the volume ratio of chloroform to acetone in the mixed solvent is (3:1) to (1: 3).
5. The method for producing acidified modified cellulose fibers according to claim 3, wherein the mass concentration of the acidified modified cellulose in the spinning solution is 0.5 to 10%.
6. Use of acidified modified cellulose fibres according to claim 1 or 2 in the processing of edible oils, comprising the steps of:
Adding the acidified modified cellulose fiber into edible oil to be degreased, heating and stirring to enable the acidified modified cellulose fiber to absorb dibutyl phthalate in the edible oil, and separating and removing the acidified modified cellulose fiber to obtain the degreased edible oil.
7. The use of the acidified modified cellulose fibers in the processing of edible oil according to claim 6, wherein the step of adding the acidified modified cellulose fibers to edible oil to be degreased, heating and stirring the mixture to allow the acidified modified cellulose fibers to adsorb dibutyl phthalate in the edible oil, and then separating and removing the acidified modified cellulose fibers to obtain the degreased edible oil comprises:
Adding the acidified modified cellulose fiber into edible oil to be degreased, heating to 100-140 ℃, stirring for 20-50 min, and then centrifuging to separate the acidified modified cellulose fiber to obtain the degreased edible oil.
8. the use of the acidified modified cellulose fibers of claim 6 in the processing of edible oil, wherein the amount of acidified modified cellulose fibers added is 5-10% by weight of the edible oil.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115595208A (en) * | 2022-10-09 | 2023-01-13 | 武汉轻工大学（Cn） | Production method of aromatic rapeseed oil or peanut oil |
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