CN115261148A - Application of eutectic solvent in grease dehydration - Google Patents
Application of eutectic solvent in grease dehydration Download PDFInfo
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- CN115261148A CN115261148A CN202211044310.4A CN202211044310A CN115261148A CN 115261148 A CN115261148 A CN 115261148A CN 202211044310 A CN202211044310 A CN 202211044310A CN 115261148 A CN115261148 A CN 115261148A
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11C—FATTY ACIDS FROM FATS, OILS OR WAXES; CANDLES; FATS, OILS OR FATTY ACIDS BY CHEMICAL MODIFICATION OF FATS, OILS, OR FATTY ACIDS OBTAINED THEREFROM
- C11C3/00—Fats, oils, or fatty acids by chemical modification of fats, oils, or fatty acids obtained therefrom
- C11C3/04—Fats, oils, or fatty acids by chemical modification of fats, oils, or fatty acids obtained therefrom by esterification of fats or fatty oils
- C11C3/10—Ester interchange
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Abstract
The invention discloses an application of a eutectic solvent in grease dehydration, wherein a hydrogen bond acceptor of the eutectic solvent is betaine, zinc chloride or proline, and a hydrogen bond donor is levulinic acid, malic acid, lactic acid, acetamide, hexanediol, glucose or fructose; the grease is liquid grease, solid grease or mixed grease. The natural eutectic solvent constructed by the invention is used as a strong polar solvent to destroy a micro-emulsion system existing in the grease, so that moisture is released from the grease, and meanwhile, the solvent is also used as a medium and has a dehydration function, and the dehydration process does not need vacuum filtration and dehydration, so that the cost is reduced, which is not suggested by the prior art. The method can quickly separate the oil phase, quicken the dehydration process, shorten the dehydration time to within 1h, facilitate the separation and purification of the product, recycle a solvent system in multiple batches, reduce the production cost and have better economical efficiency and environmental protection.
Description
Technical Field
The invention belongs to the field of grease processing, and particularly relates to an application of a eutectic solvent in grease dehydration.
Background
Baked fat is one of indispensable production raw materials for baked foods, and plays a significant role in baked products. At present, the grease used for baking foods on the market is mainly universal plastic fat such as margarine, shortening, butter and the like, and the base oil is hydrogenated oil, refined animal fat, refined vegetable grease or simple mixture of the hydrogenated oil, the refined animal fat and the refined vegetable grease. The existing general plastic fat for baked food has the problems of high saturation, high trans fat and the like. Meanwhile, the world health organization also publishes a complete 'removal plan' of trans fat, namely after 2023 years, all foods are forbidden to be added with trans fat, which is the bottleneck problem of high-quality development of the current baked food industry.
Transesterification is one of the fat-and-oil modification techniques, and is favored for the preparation of zero-trans plastic fat. The base oil can make up for the deficiency of natural oil through ester exchange reaction, and the base oil product with better plasticity and consistency is processed, so that more healthy and nutritional edible oil can be applied to baked food as special baking oil, and the quality and nutrition of the baked food are integrally improved.
The existing methods for catalyzing ester exchange can be divided into chemical catalysis ester exchange and enzyme catalysis ester exchange, and the methods have extremely high requirements on the water content in a catalytic system and mainly show that: on one hand, a chemical catalytic transesterification catalyst usually adopts a super-strong base sodium methoxide, sodium hydroxide and methanol are generated by very easy reaction with moisture, and the sodium methoxide loses the catalytic capability due to extremely trace moisture and is saponified; on the other hand, the enzyme-catalyzed transesterification catalyst is generally lipase, and because lipase has catalytic multifunctionality, the lipase can catalyze grease to perform hydrolysis reaction easily due to trace moisture in a catalytic system, so that a large amount of free fatty acid is formed, and the subsequent procedures of deacidification and refining of the grease are increased. Therefore, before the baked grease raw oil is prepared by transesterification, the grease must be dehydrated to avoid the inactivation of the catalyst or the induction of hydrolysis side reaction, which affects the product quality.
In the prior art, when the pretreatment of the ester exchange reaction is carried out on the baking raw oil, the moisture is usually removed in vacuum, heating is assisted, the treatment time is long, the energy consumption is high, the heating is easy to oxidize the grease, and the quality of the baking base material grease is finally influenced.
Disclosure of Invention
The invention aims to provide the application of the eutectic solvent in grease dehydration, and the eutectic solvent can reduce the peroxide value and the acid value of grease while dehydrating.
The purpose of the invention is realized by the following technical scheme:
the application of the eutectic solvent in grease dehydration;
the hydrogen bond acceptor of the eutectic solvent is betaine, zinc chloride or proline, and the hydrogen bond donor is levulinic acid, malic acid, lactic acid, acetamide, hexanediol, glucose or fructose;
the grease is liquid grease, solid grease or liquid-solid mixed grease (hereinafter referred to as mixed grease); the liquid/solid refers to the state of the grease at room temperature;
the liquid oil is soybean oil, rapeseed oil, peanut oil or rice bran oil (rice oil);
the solid oil is lard, palm oil or coconut oil.
Preferably, when the oil is liquid oil, the hydrogen bond acceptor/donor combination of the eutectic solvent is betaine/malic acid, betaine/lactic acid or proline/lactic acid, and under the combination, the dehydration efficiency of the liquid oil is higher;
further preferably, the liquid grease is rapeseed oil, so that the dehydration efficiency is improved, and the peroxide value of the grease is reduced.
Preferably, when the oil is solid oil, the hydrogen bond acceptor of the eutectic solvent is proline or betaine, and the hydrogen bond donor is levulinic acid or lactic acid, and under the combination, the dehydration efficiency of the solid oil is high.
Preferably, when the oil is mixed oil, the hydrogen bond acceptor of the eutectic solvent is proline or betaine, and the hydrogen bond donor is malic acid, and under the combination, the dehydration efficiency of the solid oil is high;
further preferably, in the mixed grease, the volume ratio of the liquid grease to the solid grease is 3: 7-7: 3, so that the dehydration efficiency of the mixed grease is improved, and the peroxide value and the acid value of the mixed grease are reduced.
The application of the eutectic solvent in grease dehydration comprises the following steps:
mixing the eutectic solvent and the grease, carrying out water bath reaction at 50-60 ℃ for 0.5-1 h, carrying out centrifugal separation after dehydration is finished, wherein the upper oil phase is dehydrated grease, and the lower eutectic solvent is recycled;
for liquid grease or solid grease, the water bath temperature is preferably 60 ℃; for the mixed grease, the water bath temperature is preferably 55 ℃;
preferably, the mass ratio of the grease to the eutectic solvent is 20: 1-10: 1.
The eutectic solvent is prepared by the following method:
mixing the hydrogen bond donor and the hydrogen bond acceptor, and heating in water bath until a transparent liquid is formed;
preferably, the molar ratio of the hydrogen bond donor to the hydrogen bond acceptor is 2: 1-1: 1.
Preferably, the heating temperature in the water bath is 80-100 ℃.
The invention uses the eutectic solvent for grease dehydration, and has the obvious characteristics that the strong polarity natural eutectic solvent is relied on to destroy a grease containing water microemulsion system, so that water is released from the microemulsion system, the natural eutectic solvent with excellent hydrophilicity has hydrogen bond interaction, a solvent component and water molecules form a new hydrogen bond network, water molecules in the grease are rapidly captured and extracted in a solvent phase, the dehydration process is continued, the solvent phase is rapidly separated from an oil phase, the solvent is utilized in multiple batches, and the cost is reduced.
Meanwhile, the eutectic solvent has strong polarity, can finish rapid dehydration in a short time, reduces the contact time of the grease and air, effectively reduces the oxidation of the grease, and simultaneously, grease oxidation products are generally polar micromolecules such as peroxy radicals, aldehydes and the like, and the eutectic solvent can extract the grease oxidation products in the dehydration process, thereby inhibiting the peroxide value of the grease from rising in the dehydration process. The eutectic solvent has special dissolving capacity, certain solvent systems have certain extraction effect on free fatty acid in the grease, and the content of the free fatty acid in the grease is reduced, so that the acid value of the grease is reduced.
Compared with the prior art, the invention has the following advantages and effects:
(1) The natural eutectic solvent constructed by the invention is used as a strong polar solvent to destroy a micro-emulsion system existing in the grease, so that moisture is released from the grease, and meanwhile, the solvent is also used as a medium and has a dehydration function, and the dehydration process does not need vacuum filtration and dehydration, so that the cost is reduced, which is not suggested by the prior art.
(2) The grease dehydrated by the process has extremely low water content, can be directly used for subsequent ester exchange catalysis, has no side reaction, and has small grease loss and good oil product stability.
(3) The method can quickly separate the oil phase, quicken the dehydration process, shorten the dehydration time to within 1h, facilitate the separation and purification of the product, recycle a solvent system in multiple batches, reduce the production cost and have better economical efficiency and environmental protection.
(4) The natural eutectic solvent is a solvent formed by food source components such as choline derivatives, organic acids and the like, has the advantages of safety, no toxicity, low cost, biodegradability and the like, has a simple dehydration treatment process and strong continuity operation when being applied to baking grease, and has application potential in replacing the traditional dehydrating agent in the field of grease processing.
Detailed Description
The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited thereto.
The following examples relate to edible oils and fats and natural eutectic solvents as follows:
(1) The acid value and peroxide number of edible oil in the examples are shown in table 1 below.
TABLE 1 initial acid value, peroxide number and moisture content of edible oil
(2) Levulinic acid, malic acid, lactic acid, acetamide, hexanediol, glucose, fructose, proline, betaine, and zinc chloride are all available from Shanghai Aladdin Biotechnology, inc., and zinc chloride, malic acid, glucose, fructose, proline, acetamide, and betaine are solid powders at room temperature, while levulinic acid, lactic acid, and hexanediol are liquids.
Example 1
Weighing zinc chloride and acetamide, mixing according to a molar ratio of 1:1, wherein the total mass is 5g, sequentially adding the zinc chloride and the acetamide into a round-bottom flask, and placing the round-bottom flask in a water bath at 80 ℃ while continuously stirring for 1h to form a transparent liquid (namely a eutectic solvent). Respectively weighing 100g of baking raw material liquid oil soybean oil, rapeseed oil, peanut oil, rice bran oil, solid oil lard, palm oil and coconut oil, 30g of mixed soybean oil/70 g of lard, 50g of soybean oil/50 g of lard and 30g of soybean oil/30 g of lard into the solvent (namely the eutectic solvent), heating in a water bath until the grease is completely melted, stirring the mixture in a water bath at 50 ℃ for reaction for 1 hour at 250rpm, centrifuging, taking the upper layer grease, and measuring the indexes of moisture, peroxide value, acid value and grease yield for detection and analysis.
The lower eutectic solvent is recovered and used for grease dehydration again, and the dehydration efficiency is not obviously reduced under continuous 5 batches.
Example 2
Weighing zinc chloride and hexanediol, mixing according to a molar ratio of 1: 2, sequentially adding 10g of zinc chloride and hexanediol into a round-bottom flask, and placing the flask in a water bath at 80 ℃ while continuously stirring for 1h to form a transparent liquid. Respectively weighing 100g of baking raw material liquid oil soybean oil, rapeseed oil, peanut oil, rice bran oil, solid oil lard, palm oil and coconut oil, 30g of mixed soybean oil/70 g of palm oil, 50g of soybean oil/50 g of palm oil and 70g of soybean oil/palm oil into the solvents in different reaction kettles, heating in a water bath until the grease is completely melted, stirring the mixture in a water bath at 60 ℃ for reaction at 200rpm for 1h, centrifuging, taking the upper layer grease, and measuring the indexes of moisture, peroxide value, acid value and grease yield for detection and analysis. The lower eutectic solvent is recovered and used for grease dehydration again, and the dehydration efficiency is not obviously reduced under continuous 5 batches.
Example 3
Weighing betaine and glucose according to a molar ratio of 1:1, mixing, adding 10g of the mixture into a round-bottom flask in sequence, placing the flask in a water bath at 100 ℃ while continuously stirring for 1 hour to form transparent liquid. Respectively weighing 100g of baking raw material liquid oil soybean oil, 100g of rapeseed oil, 100g of peanut oil, 100g of rice bran oil, 100g of solid oil lard, 100g of palm oil and 30g of mixed soybean oil/70 g of coconut oil, 50g of soybean oil/50 g of coconut oil and 30g of soybean oil/30 g of coconut oil into the solvents in different reaction kettles, heating in a water bath until the grease is completely melted, stirring the mixture in a water bath at 50 ℃ for 300rpm to react for 1h, centrifuging, taking the upper layer of grease, and measuring the indexes of moisture, peroxide value, acid value and grease yield for detection and analysis. The lower eutectic solvent is recovered and used for grease dehydration again, and the dehydration efficiency is not obviously reduced under continuous 5 batches.
Example 4
Weighing betaine and fructose, mixing according to a molar ratio of 1:1, sequentially adding 10g of total mass into a round-bottom flask, placing in a water bath at 100 ℃ while continuously stirring for 1h to form a transparent liquid. Respectively weighing 100g of baking raw material liquid oil soybean oil, rapeseed oil, peanut oil, rice bran oil, solid oil lard, palm oil and coconut oil, 30g of mixed rapeseed oil/70 g of lard, 50g of rapeseed oil/50 g of lard and 30g of rapeseed oil/30 g of lard into the solvents in different reaction kettles, heating in a water bath until the grease is completely melted, stirring the mixture in a water bath at 60 ℃ for reaction at 250rpm for 1h, centrifuging, taking the upper layer grease, and measuring the moisture content, peroxide value, acid value and grease yield index for detection and analysis. The lower eutectic solvent is recovered and used for grease dehydration again, and the dehydration efficiency is not obviously reduced under continuous 5 batches.
Example 5
Weighing betaine and malic acid, mixing according to a molar ratio of 1:1, adding 10g total weight into a round bottom flask in sequence, placing at 80 deg.C, and continuously stirring in water bath for 0.5h to obtain transparent liquid. Respectively weighing 100g of baking raw material liquid oil soybean oil, rapeseed oil, peanut oil, rice bran oil, solid oil lard, palm oil and coconut oil, 30g of mixed rapeseed oil/70 g of palm oil, 50g of rapeseed oil/50 g of palm oil and 30g of rapeseed oil/30 g of palm oil in different reaction kettles, adding the weighed baking raw material liquid oils into the solvent, heating in a water bath until the oil is completely melted, stirring the mixture in a water bath at 50 ℃ for reaction at 300rpm for 0.5h, centrifuging, taking the upper layer of oil, and measuring the indexes of moisture, peroxide value, acid value and oil yield for detection and analysis. The lower eutectic solvent is recovered and is used for grease dehydration again, and the dehydration efficiency is not obviously reduced under continuous 5 batches.
Example 6
Weighing proline and malic acid, mixing according to a molar ratio of 1:1, adding 5g of the total mass into a round-bottom flask in sequence, placing the round-bottom flask in a water bath at 80 ℃ while continuously stirring for 1h to form a transparent liquid. Respectively weighing 100g of baking raw material liquid oil soybean oil, rapeseed oil, peanut oil, rice bran oil, solid oil lard, palm oil and coconut oil, 30g of mixed rapeseed oil/70 g of coconut oil, 50g of rapeseed oil/50 g of coconut oil and 30g of rapeseed oil/30 g of coconut oil in different reaction kettles, adding the weighed materials into the solvent, heating in a water bath until the grease is completely melted, stirring the mixture in a water bath at 60 ℃ for reaction at 250rpm for 1h, centrifuging, taking the upper layer grease, and measuring the indexes of moisture, peroxide value, acid value and grease yield for detection and analysis. The lower eutectic solvent is recovered and is used for grease dehydration again, and the dehydration efficiency is not obviously reduced under continuous 5 batches.
Example 7
Weighing proline and levulinic acid, mixing the proline and the levulinic acid according to the molar ratio of 1: 2, sequentially adding the proline and the levulinic acid into a round-bottom flask with the total mass of 10g, placing the round-bottom flask in a water bath with constant stirring at 80 ℃ for 0.5h to form transparent liquid. Respectively weighing 100g of baking raw material liquid oil soybean oil, rapeseed oil, peanut oil, rice bran oil, solid oil lard, palm oil and coconut oil, and 30g of mixed peanut oil/70 g of lard, 50g of peanut oil/50 g of lard and 30g of peanut oil/30 g of lard into the solvents in different reaction kettles, heating in a water bath until the grease is completely melted, stirring the mixture in a water bath at 60 ℃ for reaction at 200rpm for 0.5h, centrifuging, taking the upper layer grease, and determining the indexes of moisture, peroxide value, acid value and grease yield for detection and analysis. The lower eutectic solvent is recovered and used for grease dehydration again, and the dehydration efficiency is not obviously reduced under continuous 5 batches.
Example 8
Weighing betaine and levulinic acid, mixing according to a molar ratio of 1:1, sequentially adding 5g of betaine and levulinic acid into a round-bottom flask, placing in a water bath at 80 ℃ with continuous stirring for 0.5 hour to form transparent liquid. Respectively weighing 100g of baking raw material liquid oil soybean oil, rapeseed oil, peanut oil, rice bran oil, solid oil lard, palm oil and coconut oil, 30g of mixed peanut oil/70 g of palm oil, 50g of peanut oil/50 g of palm oil and 30g of peanut oil/30 g of palm oil in different reaction kettles, adding the mixture into the solvent, heating in a water bath until the grease is completely melted, stirring the mixture in a water bath at 50 ℃ for reaction for 1 hour at 250rpm, centrifuging, taking the upper layer grease, and determining the indexes of moisture, peroxide value, acid value and grease yield for detection and analysis. The lower eutectic solvent is recovered and used for grease dehydration again, and the dehydration efficiency is not obviously reduced under continuous 5 batches.
Example 9
Weighing betaine and lactic acid, mixing according to a molar ratio of 1: 2, adding 10g total weight into a round bottom flask in sequence, placing in 80 deg.C water bath with continuous stirring for 0.5h to form transparent liquid. Respectively weighing 100g of baking raw material liquid oil soybean oil, 100g of rapeseed oil, 100g of peanut oil, 100g of rice bran oil, 100g of solid oil lard, 100g of palm oil and 100g of coconut oil, 30g of mixed peanut oil/70 g of coconut oil, 50g of peanut oil/50 g of coconut oil and 70g of peanut oil/30 g of coconut oil into the solvent, heating in a water bath until the grease is completely melted, stirring the mixture in a water bath at 60 ℃ at 250rpm for reaction for 0.5h, centrifuging, taking the upper layer of grease, and measuring the indexes of moisture, peroxide number, acid value and grease yield for detection and analysis. The lower eutectic solvent is recovered and used for grease dehydration again, and the dehydration efficiency is not obviously reduced under continuous 5 batches.
Example 10
Weighing proline and lactic acid, mixing according to a molar ratio of 1:1, adding 5g of proline and lactic acid into a round-bottom flask in sequence, placing the flask in a 80 ℃ water bath with continuous stirring for 0.5h to form transparent liquid. Respectively weighing 100g of baking raw material liquid oil soybean oil, rapeseed oil, peanut oil, rice bran oil, solid oil lard, palm oil and coconut oil, 30g of mixed rice bran oil/70 g of lard, 50g of rice bran oil/50 g of lard and 30g of rice bran oil/30 g of lard in different reaction kettles, adding the mixture into the solvent, heating in a water bath until the grease is completely melted, stirring the mixture in a water bath at 50 ℃ for reaction for 1 hour at 300rpm, centrifuging, taking the upper layer of grease, and determining the indexes of moisture, peroxide value, acid value and grease yield for detection and analysis. The lower eutectic solvent is recovered and used for grease dehydration again, and the dehydration efficiency is not obviously reduced under continuous 5 batches.
Example 11
Weighing proline and lactic acid, mixing according to a molar ratio of 1:1, adding 5g of proline and lactic acid into a round-bottom flask in sequence, placing the flask in a 80 ℃ water bath with continuous stirring for 0.5h to form transparent liquid. Respectively weighing 100g of baking raw material liquid oil soybean oil, rapeseed oil, peanut oil, rice bran oil, solid oil lard, palm oil and coconut oil, 30g of mixed rice bran oil/70 g of palm oil, 50g of rice bran oil/50 g of palm oil and 70g of rice bran oil/30 g of palm oil in different reaction kettles, adding the mixture into the solvent, heating in a water bath until the grease is completely melted, stirring the mixture in a water bath at 55 ℃ for reaction for 1 hour at 300rpm, centrifuging, taking the upper layer of grease, and determining the indexes of moisture, peroxide value, acid value and grease yield for detection and analysis. The lower eutectic solvent is recovered and used for grease dehydration again, and the dehydration efficiency is not obviously reduced under continuous 5 batches.
Example 12
Weighing proline and lactic acid, mixing according to a molar ratio of 1:1, adding 5g of proline and lactic acid into a round-bottom flask in sequence, placing the flask in a 80 ℃ water bath with continuous stirring for 0.5h to form transparent liquid. Respectively weighing 100g of baking raw material liquid oil soybean oil, rapeseed oil, peanut oil, rice bran oil, solid oil lard, palm oil and coconut oil, 30g of mixed rice bran oil/70 g of coconut oil, 50g of rice bran oil/50 g of coconut oil and 30g of rice bran oil/30 g of coconut oil in different reaction kettles, adding the mixture into the solvent, heating in a water bath until the grease is completely melted, stirring the mixture in a water bath at 60 ℃ for reaction at 300rpm for 1h, centrifuging, taking the upper layer grease, and determining moisture, peroxide value, acid value and grease yield index for detection and analysis. The lower eutectic solvent is recovered and used for grease dehydration again, and the dehydration efficiency is not obviously reduced under continuous 5 batches.
Comparative example 1
Respectively weighing 100g of baking raw material liquid oil soybean oil, rapeseed oil, peanut oil, rice bran oil, solid oil lard, palm oil and coconut oil and 100g of mixed oil according to different proportions in example 1 in different reaction kettles, heating in a water bath until the oil is completely melted, stirring the mixture in a water bath at 100 ℃ for 300rpm to react for 6h, centrifuging, taking the upper layer of oil, and determining the indexes of moisture, peroxide value, acid value and oil yield.
Comparative example 2
Weighing 20g of anhydrous sodium sulfate, adding the anhydrous sodium sulfate into a round-bottom flask, placing the flask in a water bath at 80 ℃ and continuously stirring the flask for 1 hour to form a transparent liquid. Respectively weighing 100g of baking raw material liquid oil soybean oil, rapeseed oil, peanut oil, rice bran oil, solid oil lard, palm oil and coconut oil in different reaction kettles, weighing 100g of the mixed oil according to different proportions in the example 1, heating in a water bath until the oil is completely melted, stirring the mixture in a water bath at 50 ℃ for 200rpm to react for 1h, centrifuging, taking the upper layer of oil, and determining the indexes of moisture, peroxide value, acid value and oil yield for detection and analysis.
The results of measuring the dehydration efficiency, peroxide value, acid value, and yield of fats and oils of the liquid oil, solid oil, and mixed oil in each example and comparative example are shown in tables 2, 3, and 4, respectively, and the dehydration efficiency after the eutectic solvent is used in a plurality of batches is shown in table 5.
As can be seen from table 2, the natural eutectic solvent system can significantly improve the efficiency of liquid oil dehydration, and especially hydrogen bond receptors betaine and malic acid or lactic acid (examples 5 and 9) and proline and lactic acid (example 12) have certain advantages.
The data in table 3 show the influence of the natural eutectic solvent system on the dehydration of solid oil, specifically, hydrogen bond donor levulinic acid or lactic acid, hydrogen bond acceptor proline or betaine (examples 7-9 and 12) have obvious advantages compared with other systems, compared with a comparative example, the increase of peroxide value and acid value can be effectively inhibited, the quality of baking raw oil is maintained, and the multi-batch utilization is realized.
The data in table 4 show the effect of the natural eutectic solvent on the dehydration treatment of the solid-liquid mixed oil, and the data show that the hydrogen bond donor malic acid and the hydrogen bond acceptor betaine or proline (examples 5 and 6) have better application effects than other systems, and compared with the suction filtration system (comparative example 1), the baking raw material oil subjected to the dehydration treatment of the natural eutectic solvent has stable quality, and multi-batch utilization is realized.
Temperature is an important factor influencing the dehydration of the natural eutectic solvent, and analysis shows that the dehydration treatment of liquid or solid oil increases the system dehydration efficiency with the increase of temperature (example 10, example 11 and example 12 in tables 1 and 2), but the solid and liquid mixed oil has no similar result, and the dehydration efficiency of the mixed oil decreases with the increase of temperature (example 10, example 11 and example 12 in table 3).
The data in table 5 show the dehydration effect of the eutectic solvent batch recycling, and from the result analysis, it can be seen that the eutectic solvent system provided by the invention can realize multi-batch utilization and no obvious reduction in dehydration efficiency when being used in the grease dehydration process, while neither comparative example 1 nor comparative example 2 can realize batch utilization, which indicates that the natural eutectic solvent constructed by the invention has sustainability, the use of solvent dosage is reduced, and the production cost is reduced.
In conclusion, the detection of the peroxide value and the acid value index of the oil after the natural eutectic solvent constructed by the invention is treated and dehydrated conforms to the national food safety regulation range. Compared with a pumping filtration system (comparative example 1), the natural eutectic solvent system can effectively inhibit the rise of peroxide value and acid value and maintain the quality of grease, and is found to be used for dehydration treatment of liquid oil, solid oil and solid-liquid mixed grease by comparison with an anhydrous sodium sulfate system (comparative example 2), so that multi-batch utilization is realized, and the natural eutectic solvent system has high economical efficiency and environmental protection. Therefore, the natural eutectic solvent has better potential value when being applied to grease dehydration.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. The application of the eutectic solvent in grease dehydration is characterized in that:
the hydrogen bond acceptor of the eutectic solvent is betaine, zinc chloride or proline, and the hydrogen bond donor is levulinic acid, malic acid, lactic acid, acetamide, hexanediol, glucose or fructose;
the grease is liquid grease, solid grease or mixed grease.
2. Use according to claim 1, characterized in that:
the liquid oil is soybean oil, rapeseed oil, peanut oil or rice bran oil;
the solid oil is lard, palm oil or coconut oil.
3. Use according to claim 2, characterized in that: when the grease is liquid grease, the hydrogen bond acceptor/donor composition of the eutectic solvent is betaine/malic acid, betaine/lactic acid or proline/lactic acid.
4. Use according to claim 3, characterized in that: the liquid grease is rapeseed oil.
5. Use according to claim 2, characterized in that: when the grease is solid grease, the hydrogen bond acceptor of the eutectic solvent is proline or betaine, and the hydrogen bond donor is levulinic acid or lactic acid.
6. Use according to claim 2, characterized in that: when the grease is mixed grease, the hydrogen bond acceptor of the eutectic solvent is proline or betaine, and the hydrogen bond donor is malic acid.
7. Use according to claim 6, characterized in that: in the mixed grease, the volume ratio of the liquid grease to the solid grease is 3: 7-7: 3.
8. Use according to claim 1, characterized in that it comprises the following steps:
mixing the eutectic solvent with the grease, carrying out water bath reaction at 50-60 ℃ for 0.5-1 h, carrying out centrifugal separation after dehydration is finished, wherein the upper oil phase is dehydrated grease, and the lower eutectic solvent is recycled.
9. Use according to claim 8, characterized in that: for liquid grease or solid grease, the water bath temperature is 60 ℃; for the mixed fat, the water bath temperature was 55 ℃.
10. Use according to claim 8, characterized in that: the mass ratio of the grease to the eutectic solvent is 20: 1-10: 1.
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| CN116356596A (en) * | 2023-02-07 | 2023-06-30 | 青岛先为纳米材料科技有限公司 | Method for preparing nanocellulose and lignin by biomass one-pot method |
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| CN112048337A (en) * | 2020-09-01 | 2020-12-08 | 宁波锋成先进能源材料研究院有限公司 | Low-temperature demulsifier and preparation method thereof |
| CN113061486A (en) * | 2021-04-09 | 2021-07-02 | 广东省农业科学院蚕业与农产品加工研究所 | Method for removing free fatty acid in grease through enzyme catalysis |
| WO2021209968A1 (en) * | 2020-04-17 | 2021-10-21 | Giuseppe Giampietro | Process for treating soapy pastes deriving from the neutralization and/or saponification of vegetable or animal oils or fats and/or mixtures thereof for the recovery of the substances contained therein |
| CN114525177A (en) * | 2022-02-25 | 2022-05-24 | 陕西科技大学 | Enzymatic deacidification method for high-acid-value oil |
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2022
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2123716A (en) * | 1982-07-17 | 1984-02-08 | British Petroleum Co Plc | Electrostatic separation of oil/water emulsions |
| WO2021209968A1 (en) * | 2020-04-17 | 2021-10-21 | Giuseppe Giampietro | Process for treating soapy pastes deriving from the neutralization and/or saponification of vegetable or animal oils or fats and/or mixtures thereof for the recovery of the substances contained therein |
| CN112048337A (en) * | 2020-09-01 | 2020-12-08 | 宁波锋成先进能源材料研究院有限公司 | Low-temperature demulsifier and preparation method thereof |
| CN113061486A (en) * | 2021-04-09 | 2021-07-02 | 广东省农业科学院蚕业与农产品加工研究所 | Method for removing free fatty acid in grease through enzyme catalysis |
| CN114525177A (en) * | 2022-02-25 | 2022-05-24 | 陕西科技大学 | Enzymatic deacidification method for high-acid-value oil |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116356596A (en) * | 2023-02-07 | 2023-06-30 | 青岛先为纳米材料科技有限公司 | Method for preparing nanocellulose and lignin by biomass one-pot method |
| CN116356596B (en) * | 2023-02-07 | 2023-12-01 | 青岛先为纳米材料科技有限公司 | Method for preparing nanocellulose and lignin by biomass one-pot method |
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