Preparation process and application of natural composite acidulant for electronic cigarettes

Abstract

The invention discloses a preparation process and application of a natural composite acidulant for electronic cigarettes. The preparation process comprises the following steps: firstly, juicing sour plants, filtering, and then performing membrane concentration by using ultrafiltration equipment with the molecular weight cutoff of 10KD-50KD; adding 1-10 times by mass of a solvent into the concentrated solution, carrying out cooling and quick-freezing at a quick-freezing temperature of-80 DEG C to-10 DEG C, and filtering to remove impurities while the concentrated solution is cold; finally, carrying out molecular distillation on the filtrate, wherein the distillation temperature is 50-200 DEG C; and collecting distillate to obtain a natural composite acidulant product. The natural composite acidulant product prepared by the method has natural taste and elegant quality which are not achieved by common products, and is high in acidulant strength, remarkable in acid increasing effect and stable in performance. Meanwhile, many defects of a synthetic acidulant can be effectively overcome, irritation is reduced, the taste is not affected, meanwhile, the acidulant is safer, more stable and non-toxic, and the requirement of people for the health concept is met.

Description

Technical Field

[0001] The present invention relates to the technical field of acidulant preparation methods, and in particular to a preparation process and application of a natural composite acidulant suitable for electronic cigarettes. Background Art

[0002] Electronic cigarettes are a non-combustion alternative to tobacco products. Electronic cigarette liquid is the core source of aroma and flavor, and its main ingredients are propylene glycol, glycerin or polyethylene glycol containing nicotine. Among them, acidulant is an important additive added to electronic cigarette liquid to increase the sour taste, which can make up for the lack of sour flavor of spices, and at the same time has the function of improving taste and enhancing the production of body fluids.

[0003] In the prior art, the sour taste of electronic cigarette liquid is mainly enhanced by directly adding organic acids, such as malic acid, citric acid, tartaric acid, acetic acid, lactic acid, propionic acid, etc. However, this method is too simple and rough, so the sour taste is extremely unnatural, the acidification effect is not good, and it is irritating, which affects the quality of electronic cigarettes to a certain extent.

[0004] At present, there are few patents on electronic cigarette acidifiers, which are basically limited to the formulation process of ordinary flavors and the development of basic raw materials. For example, Chinese patent CN104745430A discloses a method for producing a soft acidic flavoring agent, CN117158635A discloses a sour composition, an acidifier for atomized liquid and its application, CN110214920A discloses a natural plant acidifier and its preparation method, CN117338032A discloses a fruit acid flavor and atomized liquid for liquid atomized liquid. CN107772400A discloses a Chinese medicine acidifier and its preparation method. At present, there is no report on the research on the preparation process of natural composite acidifiers for electronic cigarettes. Summary of the invention

[0005] The purpose of the present invention is to make up for the deficiencies of the prior art and provide a preparation process and application of a high-quality natural composite acidulant for electronic cigarettes which has a natural feel and high acidity, can reduce irritation, and has stable performance.

[0006] The objective of the present invention is achieved through the following technical solutions:

[0007] A preparation process of a natural composite acidulant for electronic cigarettes comprises the following steps: firstly, squeezing juice from a sour plant, filtering and then concentrating the juice using an ultrafiltration device with a molecular weight cutoff (MWCO) of 10KD to 50KD; then, adding 1 to 10 times the mass of a solvent to the concentrated solution for cooling and quick freezing at a quick freezing temperature of -80°C to -10°C, and filtering while cold to remove impurities; finally, molecular distilling the filtrate at a distillation temperature of 50 to 200°C; and collecting the distillate to obtain a natural composite acidulant product.

[0008] Preferably, the sour plant is one or more of apple, tangerine peel, roxburgh, pear, peach, banana, plum, citrus, pineapple, bayberry, green plum, grape, lychee, blueberry, loquat, watermelon, lemon, strawberry, grapefruit, mulberry, hawthorn, sour papaya, cantaloupe, pitaya, tamarind, jujube, sea buckthorn, black plum, cherry, raspberry, pomegranate, passion fruit, apricot, and tomato.

[0009] Preferably, the solvent is one or more of glycerol, propylene glycol and polyethylene glycol.

[0010] The application of the natural composite acidulant for electronic cigarettes prepared by the process of the present invention is to add the natural composite acidulant for electronic cigarettes into electronic cigarette liquid.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] The processing technology of the present invention is sophisticated. According to the composition characteristics of electronic cigarette liquid and natural flavors, firstly, multiple plants with high acid content are selected for juicing and membrane concentration; then the temperature is reduced and quick-frozen, and impurities are filtered out; finally, molecular distillation technology is used for segmented separation, which effectively enriches the acidic components, increases the sourness intensity and characteristics, and prepares a high-quality natural composite acidulant product. Most of the impurities are effectively removed by membrane separation and low-temperature freezing, solving the obvious "core burning" problem when the electronic cigarette liquid is heated.

[0013] The natural composite acidulant product prepared by the present invention has a natural taste and elegant quality that ordinary products do not have, the product has a strong sourness, a significant acidification effect, and stable performance. At the same time, it can also effectively make up for the shortcomings of many synthetic acidulants, reduce irritation, and is safer, more stable, and non-toxic without affecting the taste, meeting people's requirements for health concepts. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The total ion current diagram of the aroma component detection of the natural composite acidulant of the electronic cigarette prepared in Example 1;

[0015] Figure 2 The total ion current diagram of the aroma component detection of the natural composite acidulant of the electronic cigarette prepared in Example 2;

[0016] Figure 3 The total ion current diagram of the aroma component detection of the natural composite acidulant of the electronic cigarette prepared in Example 3;

[0017] Figure 4 This is the total ion current diagram for detecting the aroma components of the natural composite sour agent for electronic cigarettes prepared in Example 4. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the present invention clearer, the content of the present invention will be clearly and completely described in conjunction with the embodiments below. The described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, equivalent substitutions made by ordinary technicians in the field without creative work are all within the scope of protection of the present invention.

[0019] Example 1

[0020] A preparation process for a natural composite acidulant for electronic cigarettes. First, juices are squeezed and filtered from apples, roxburghii, peaches, bananas, plums, citrus, pineapples, bayberries, green plums, grapes, lychees, sea buckthorns, loquats, watermelons, lemons, strawberries, grapefruits, mulberries, hawthorns, sour papayas, honeydew melons, and pitayas, respectively. The filtered juices are then mixed and concentrated by membrane using an ultrafiltration device with a molecular weight cutoff (MWCO) of 30KD. Three times the mass of propylene glycol is then added to the concentrated solution for rapid freezing at a temperature of -20°C, and impurities are removed by cold filtration. Finally, the filtrate is molecularly distilled at a distillation temperature of 100°C. After distillation, the distillate is collected to obtain a natural composite acidulant product. The gas chromatography test results of the obtained natural composite acidulant product are shown in Figure 1 The total ion current diagram of aroma component detection is shown and the aroma component detection results are shown in Table 1.

[0021] Table 1 Detection results of aroma components of natural composite acidulant of electronic cigarette in Example 1

[0022]

[0023]

[0024] Depend on Figure 1 As shown in Table 1, the content of ethyl lactate in the natural composite acidulant of electronic cigarette prepared in Example 1 is the highest (57.03%), which is mainly found in apples, grapes, pineapples, bananas, papayas, pears, plums and other fruits. Ethyl lactate has a sour and sweet fruit aroma; ethyl glycolate (12.45%) is found in fruits such as strawberries and bananas, and has a natural fruity sweet and sour flavor; in addition, diethyl malonate (3.65%) has a sweet and sour taste of apples, and is found in fruits such as strawberries, apples and grapes; palmitic acid (3.22%) is mainly found in most fruits such as apples and sea buckthorn, and has the function of regulating the acidity of the taste. The prepared natural composite acidulant of electronic cigarette has a strong sour taste, an obvious acidifying effect, a natural taste and nasal smoke, reduced irritation, and stable performance.

[0025] Example 2

[0026] A preparation process for a natural composite acidulant for electronic cigarettes, comprising: firstly squeezing and filtering the juices of apples, tamarind, sea buckthorn, plum, bayberry, green plum, grape, watermelon, lemon, citrus, strawberry, and grapefruit, respectively; then mixing the filtered juices, and performing membrane concentration using an ultrafiltration device with a molecular weight cutoff (MWCO) of 10KD; then adding 1 times the mass of propylene glycol to the concentrated solution for cooling and quick freezing at a quick freezing temperature of -10°C, and filtering while cold to remove impurities; finally, performing molecular distillation on the filtrate at a distillation temperature of 50°C. After the distillation is completed, the distillate is collected to obtain a natural composite acidulant product. The gas chromatography test results of the obtained natural composite acidulant product are shown in Figure 2 The total ion current diagram of aroma component detection is shown in FIG. 1 and the aroma component detection results are shown in FIG. 2 .

[0027] Table 2 Detection results of aroma components of natural composite acidulant of electronic cigarette in Example 2

[0028]

[0029]

[0030] Depend on Figure 2 As shown in Table 2, the furfural content in the natural composite acidulant of electronic cigarette prepared in Example 2 is the highest (26.956%), which is mainly found in fruits such as tamarind, lemon, and plum, nonanal (8.989%) is found in fruits such as lemon, grapefruit, and citrus; valeraldehyde (4.819%) and hexanal (5.745%) are mainly found in watermelon and citrus fruits; 1-(2-furanyl)-ethanone (6.395%) is found in citrus fruits, which has the sweet and sour taste of citrus; octanoic acid (5.858%) is found in apples and citrus fruits, butyric acid and hexanoic acid are found in strawberries. The above ingredients have the natural sour taste of fruits and a slightly sweet taste, and together constitute the natural electronic cigarette acidulant, which has a natural, coordinated, and elegant taste and smoke, a strong sour taste, and stable performance.

[0031] Example 3

[0032] A preparation process for a natural composite acidulant for electronic cigarettes. First, juice lemons, citrus fruits, tangerine peels, watermelons, bananas, sour papayas, grapes, tamarinds, apricots, and tomatoes are squeezed and filtered respectively. Then, the filtered juices are mixed and concentrated by membrane using an ultrafiltration device with a molecular weight cutoff (MWCO) of 50KD. Then, 10 times the mass of solvent is added to the concentrate for cooling and quick freezing, and the quick freezing temperature is -30°C. The solvent used is a mixture of propylene glycol and polyethylene glycol in a mass ratio of 7:1. After quick freezing, filter while cold to remove impurities. Finally, the filtrate is molecularly distilled at a distillation temperature of 170°C. After distillation, the distillate is collected to obtain a natural composite acidulant product. The gas chromatography test report of the obtained natural composite acidulant product is shown in Figure 3The total ion current diagram of aroma component detection is shown in FIG. 1 and the aroma component detection results are shown in FIG. 3 .

[0033] Table 3 Detection results of aroma components of natural composite acidulant of electronic cigarette in Example 3

[0034]

[0035]

[0036] Depend on Figure 3 As shown in Table 3, the natural composite acidulant for electronic cigarettes prepared in Example 3 has the highest citral content (19.309%), which is mainly found in citrus fruits such as lemons, oranges, grapefruits, and tangerine peels. Citral is a natural organic acid; acetophenone (15.483%) is mainly found in fruits such as apples, bananas, tomatoes, grapes, and apricots, and has a sweet and sour taste of citrus; phenylacetaldehyde (4.123%) is mainly found in fruits such as tomatoes, lemons, oranges, grapefruits, and tangerine peels, and has the freshness, sweet and sour taste of fruits. The above ingredients together constitute the natural electronic cigarette acidulant, which has a natural and elegant taste and smoke, a strong sour taste, and stable performance.

[0037] Example 4

[0038] A preparation process for a natural composite acidulant for electronic cigarettes, firstly, juice apples, pears, hawthorns, plums, citrus, tangerine peel, pineapples, grapes, sour papayas, loquats, strawberries, grapefruits, bananas, and sea buckthorns are squeezed and filtered, then the filtered juices are mixed, and membrane concentration is performed using an ultrafiltration device with a molecular weight cutoff (MWCO) of 20KD; then, 10 times the mass of solvent is added to the concentrate for cooling and quick freezing, the quick freezing temperature is -80°C, and impurities are removed by cold filtration, the solvent used is a mixture of propylene glycol and glycerol in a mass ratio of 9:1, and finally the filtrate is molecularly distilled at a distillation temperature of 200°C. After the distillation is completed, the distillate is collected to obtain a natural composite acidulant product. The gas chromatography test report of the obtained natural composite acidulant product is shown in Figure 4 The total ion current diagram of aroma component detection is shown in FIG. 1 and the aroma component detection results are shown in FIG. 4 .

[0039] Table 4 Detection results of aroma components of natural composite acidulant of electronic cigarette in Example 4

[0040]

[0041] Depend on Figure 4As shown in Table 4, the content of sorbic acid (46.325%) in the natural composite acidulant of electronic cigarette prepared in Example 4 is the highest, mainly found in fruits such as apples, pears, hawthorns, loquats, and sea buckthorns, and has strong acidity; followed by citral (23.443%), mainly found in citrus fruits such as lemons, oranges, grapefruits, and tangerine peels, and citral is a natural organic acid; in addition, ethyl lactate (9.199%) is mainly found in apples, grapes, pineapples, bananas, papayas, pears, plums, and other fruits, and ethyl lactate has a sour and sweet fruit aroma. The above ingredients together constitute the natural electronic cigarette acidulant, which has a natural and comfortable taste and smoke, a strong sourness, and stable performance.

[0042] The natural composite acidulant for electronic cigarettes prepared in Examples 1 to 4 of the present invention was added to the same electronic cigarette liquid in an amount of 5% for smoking evaluation. The application evaluation results are shown in Table 5.

[0043] Table 5 Evaluation results of the application of natural composite acidulants in electronic cigarettes

[0044]

[0045] The juice extraction equipment and ultrafiltration equipment used in the preparation process of the present invention are all general equipment in the prior art. The preparation process is simple and delicate, and the natural beneficial ingredients of sour plants are best retained, which can improve the sour taste quality of electronic cigarettes. In addition, the production equipment is mature, and industrialized production can be formed, which has a good market prospect.

Claims

1. A preparation process of a natural composite acidulant for electronic cigarettes, characterized in that: First, the sour plant juice is squeezed, filtered, and then membrane concentrated using ultrafiltration equipment with a molecular weight cutoff of 10KD to 50KD; then, 1 to 10 times the mass of solvent is added to the concentrated liquid for cooling and quick freezing at a quick freezing temperature of -80°C to -10°C, and impurities are removed by cold filtration; finally, the filtrate is molecularly distilled at a distillation temperature of 50 to 200°C; and the distillate is collected to obtain a natural composite acidulant product.

2. The preparation process of a natural composite acidulant for electronic cigarettes according to claim 1, characterized in that: The sour plants are one or more of apple, tangerine peel, roxburgh, pear, peach, banana, plum, citrus, pineapple, bayberry, green plum, grape, lychee, blueberry, loquat, watermelon, lemon, strawberry, grapefruit, mulberry, hawthorn, sour papaya, cantaloupe, pitaya, tamarind, jujube, sea buckthorn, black plum, cherry, raspberry, pomegranate, passion fruit, apricot, and tomato.

3. The preparation process of a natural composite acidulant for electronic cigarette according to claim 1, characterized in that: The solvent is one or more of glycerol, propylene glycol and polyethylene glycol.

4. The use of the natural composite acidulant for electronic cigarettes prepared by the process of claim 1, 2 or 3, wherein the natural composite acidulant for electronic cigarettes is added to electronic cigarette liquid.

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