Preparation method and application of lemon micro powder

Abstract

The invention provides a preparation method and application of lemon micro powder, effective components of lemons can be fully obtained, the health-care effect of the lemons on human bodies is improved, whole lemons without stems are peeled, and lemon peels and lemon pulp are obtained; the method comprises the following steps: guiding lemon peel into a first vacuum freeze-drying machine for rapid drying treatment, and then carrying out low-temperature superfine grinding on the lemon peel subjected to vacuum freeze-drying to obtain lemon peel freeze-dried powder; guiding the lemon pulp into a low-temperature cold pressing machine, and sieving to obtain lemonade and lemon seeds respectively; lemonade is guided into a second vacuum freeze-drying machine to be subjected to rapid drying treatment, then the lemonade subjected to vacuum freeze-drying is subjected to low-temperature superfine grinding, and lemonade freeze-dried powder is obtained; lemons are introduced into a supercritical extraction device for rapid extraction, a lemon seed extract is obtained, the lemon seed extract is introduced into a third vacuum freeze-drying machine for rapid drying treatment, a third low-temperature ultrafine grinder is used for low-temperature grinding, and the lemon seed extraction freeze-dried powder is obtained.

Description

Technical Field

[0001] The invention relates to the field of production of whole lemon freeze-dried powder, and in particular to a preparation method of lemon micropowder and application thereof. Background Art

[0002] Anyue is the "Chinese Lemon Capital", with lemon planting scale, output and market share accounting for more than 80% of China. Lemon is rich in vitamins and trace elements necessary for the human body, and has certain effects on strengthening blood vessel toughness, strengthening skin metabolism, enhancing liver and kidney function, expelling gallstones, and lowering cholesterol. It can also prevent hypertension, heart disease, oral ulcers, scurvy, calcium deficiency in children and the elderly, and many other diseases.

[0003] But in fact, when people eat lemons, they usually cut them into slices and soak them in water to drink because lemons taste sour and bitter. The intake of effective ingredients in lemons is small, and the high-quality ingredients in lemons cannot be effectively utilized.

[0004] In response to this problem, the prior art patent number is 201510072679.X, which is a method for preparing natural whole lemon freeze-dried powder. The whole lemon fruit and / or the peel residue after juicing are crushed at low temperature to obtain fruit pulp, which is then quickly frozen and freeze-dried to obtain freeze-dried powder, which can solve the problem of low lemon intake. However, in the preparation process, lemon micropowder is obtained only by conventional methods such as crushing and freeze-drying, and the medicinal components of the lemon seeds cannot be stimulated, so that the health care effect of the lemon micropowder obtained is relatively low. Summary of the invention

[0005] The purpose of the present invention is to provide a preparation method of lemon micropowder, which can fully obtain the effective components of lemon, change people's eating habits of lemons, increase the intake of effective components of lemons, and enhance the health care effect of lemons on the human body.

[0006] The embodiment of the present invention is achieved as follows:

[0007] A method for preparing lemon micropowder, the preparation method comprising:

[0008] Peeling the whole lemon fruit without stems to obtain lemon peel and lemon pulp;

[0009] The lemon peel is introduced into a first vacuum freeze dryer through a first low-temperature conveyor for rapid drying, the output end of the first vacuum freeze dryer is connected to a first low-temperature ultrafine pulverizer, and the vacuum freeze-dried lemon peel is ultrafinely pulverized at low temperatures to obtain lemon peel freeze-dried powder;

[0010] The lemon pulp is introduced into a low-temperature cold press and sieved to obtain lemonade and lemon seeds respectively;

[0011] The lemonade is introduced into a second vacuum freeze dryer for rapid drying, the output end of the second vacuum freeze dryer is connected to a second low-temperature ultrafine pulverizer, and the vacuum freeze-dried lemonade is ultrafinely pulverized at low temperatures to obtain freeze-dried lemonade powder;

[0012] The lemon seeds are introduced into a supercritical extraction device for rapid extraction to obtain a lemon seed extract, and the lemon seed extract is introduced into a third vacuum freeze dryer for rapid drying. The output end of the third vacuum freeze dryer is connected to a third low-temperature ultrafine pulverizer to obtain a lemon seed extract freeze-dried powder.

[0013] In a preferred embodiment of the present invention, the lemon pulp is sliced ​​before being introduced into the low-temperature cold press.

[0014] In a preferred embodiment of the present invention, the above-mentioned lemon peel freeze-dried powder, lemonade freeze-dried powder and lemon seed extract freeze-dried powder are 500-1000 mesh freeze-dried powders.

[0015] In a preferred embodiment of the present invention, the above-mentioned whole lemon fruit without stems is a whole lemon fruit frozen at -10 to -5°C.

[0016] In a preferred embodiment of the present invention, the vacuum freeze dryer is used for pre-freezing at -40 to -30°C for 3 hours, and the vacuum drying time is 24 hours.

[0017] In a preferred embodiment of the present invention, the pulverizing temperature of the above-mentioned low-temperature ultrafine pulverizer is between -10 and -5°C.

[0018] In a preferred embodiment of the present invention, the above-mentioned lemon peel freeze-dried powder, lemonade freeze-dried powder and lemon seed extract freeze-dried powder are sealed and stored in a refrigerator at 0-4°C.

[0019] An application of lemon micropowder, comprising: preparing lemon peel freeze-dried powder, lemonade freeze-dried powder and / or lemon seed extract freeze-dried powder respectively by any of the above-mentioned preparation methods; mixing the lemon peel freeze-dried powder, lemonade freeze-dried powder and lemon seed extract freeze-dried powder in proportion; and directly preparing them into capsules, granules, tablets, powders or pills by conventional processes.

[0020] An application of lemon micropowder, using any of the above-mentioned preparation methods to prepare lemon peel freeze-dried powder, lemonade freeze-dried powder and / or lemon seed extract freeze-dried powder, and adding conventional amounts of edible auxiliary materials to prepare capsules, granules, tablets, powders or pills using conventional processes.

[0021] An application of lemon micropowder, wherein any of the above-mentioned preparation methods is used to prepare lemon peel freeze-dried powder, lemonade freeze-dried powder and / or lemon seed extract freeze-dried powder for preparing functional drinks or health products.

[0022] The beneficial effects of the embodiments of the present invention are:

[0023] This technical solution processes the effective components of the whole lemon fruit in different ways to maximize the acquisition of the effective components of the lemon;

[0024] When processing lemon peel, the first vacuum freeze dryer is used to extract the essence of lemon peel at a low temperature of -40 to -30°C, and then dried in a vacuum environment, which guarantees the activity and stability of the effective ingredients of lemon peel to the greatest extent; then low-temperature ultrafine grinding is used to further ensure the physicochemical, structural, bioactive component dissolution and antioxidant activity of lemon peel powder to obtain lemon peel freeze-dried powder;

[0025] When processing lemon pulp, the lemon pulp is first filtered to separate lemon juice and lemon seeds, and then processed separately; the processing of lemon juice is the same as that of lemon peel, and when processing lemon seeds, a supercritical extraction device is first used for rapid extraction, especially to extract the very precious limonin in lemons, and then the same processing method as lemon juice is used to form lemon seed extract freeze-dried powder;

[0026] The lemon component thus prepared forms a freeze-dried powder, which can be directly compressed into tablets, granules and other forms that are easy for human body to ingest and absorb, so as to enhance the health care effect of lemon on human body. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 The present invention is a flowchart of a method for preparing lemon micropowder according to an embodiment of the present invention. DETAILED DESCRIPTION

[0029] In order to make the purpose, 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 in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0032] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be more comprehensive and complete and fully convey the concept of the example embodiments to those skilled in the art.

[0033] First embodiment

[0034] See also Figure 1 , a method for preparing lemon micropowder, the preparation method comprising:

[0035] S1: Peel the whole lemon fruit without stems to obtain lemon peel and lemon pulp. Furthermore, the whole lemon fruit without stems used in this step is washed and frozen at -10 to -5°C. The fresh lemon fruit containing a large amount of water is quickly frozen at low temperature to quickly freeze the water into a solid state. This process is usually completed in a sub-zero environment to ensure that the particles can be evenly frozen to avoid the loss of volatile components in the lemon peel during the peeling process. The peeling process retains the white lemon fruit pith part of the lemon, which can be achieved by setting a peeling machine;

[0036] S11: Then, the lemon peel is introduced into the first vacuum freeze dryer through the first low-temperature conveyor for rapid drying. The vacuum freeze dryer is pre-frozen at -40 to -30°C for 3 hours, and the vacuum drying time is 24 hours. The principle of the vacuum freeze dryer is that solid ice is directly sublimated into gaseous water vapor under vacuum conditions, thereby removing moisture from the lemon; this step does not involve the presence of liquid water, so the original flavor and nutritional components of the lemon can be retained to the maximum extent;

[0037] The output end of the first vacuum freeze dryer is connected to the first low-temperature ultrafine pulverizer, and the vacuum freeze-dried lemon peel is ultrafinely pulverized at a low temperature of -10 to -5°C, sieved to obtain 500-1000 mesh lemon peel freeze-dried powder, sealed and stored at 0-4°C for later use; the lemon peel freeze-dried powder in this step can maintain its original shape and structure, avoiding the problem of particle breakage that may occur in traditional drying methods.

[0038] Preferably, the freeze-dried powder is 800 mesh micro powder. If the mesh is too small, the internal components of the lemon are not easy to precipitate; if the mesh is too large, the sugar in the lemon is easy to precipitate, which is not convenient for sieving and makes the subsequent freeze-dried powder easy to stick together.

[0039] S2: Slice the lemon pulp. The slicing process is carried out at room temperature to facilitate the thawing of the lemon pulp. At the same time, when the lemon pulp is frozen and thawed, the lemon juice is easy to be squeezed out in the low-temperature cold press process. At the same time, the outer skin, embryo and endosperm of the lemon seeds become soft, which is conducive to the subsequent extraction of limonin and lemon seed oil.

[0040] The lemon pulp is introduced into a low-temperature cold press, and sieved to obtain lemonade and lemon seeds respectively. The lemon seeds in this step include lemon seeds and lemon meridians, which are the places with the highest content of limonin. The content in lemon peel and lemon pulp is very small, so that 90% of the limonin in the lemon can be extracted in a supercritical extraction device;

[0041] S21: introducing the lemonade into a second vacuum freeze dryer for rapid drying, pre-freezing at -40 to -30°C for 3 hours, and vacuum drying for 24 hours; the output end of the second vacuum freeze dryer is connected to a second low-temperature ultrafine grinder, and the vacuum freeze-dried lemonade is ultrafinely grinded at -10 to -5°C, sieved to obtain 500-1000 mesh lemonade freeze-dried powder, sealed and stored, and refrigerated at 0-4°C for later use;

[0042] S22: The lemon seeds are introduced into a supercritical extraction device for rapid extraction to obtain a lemon seed extract. The obtained lemon seed extract contains the most precious limonin in lemon seeds and lemon seed oil. The limonin in lemon seeds is known as the nemesis of cancer cells, can inhibit the occurrence of various cancers, and has a good therapeutic effect on diseases such as hepatitis, ulcers and syphilis; lemon seed oil is used for skin care, anti-oxidation and treatment of defective skin and body parts.

[0043] Specifically, the extraction method of the supercritical extraction device is: set the extraction time to 1h, the CO2 flow rate to 20L / h, the analytical pressure to 5MPa, and the analytical temperature to 60°C. When the predetermined temperature and pressure conditions are reached, the entrainer pump is started, and 95% ethanol is quantitatively injected. The extract is collected from the analyzer during the extraction process. After the experiment, the lemon seed oil is filtered out and the ethanol is recovered under reduced pressure. Compared with the low-temperature freezing extraction method of lemon peel, the addition of this step can extract more than or equal to 90% of limonin, which greatly improves the health care effect of the later lemon freeze-dried powder.

[0044] Then, the lemon seed extract is introduced into the third vacuum freeze dryer, pre-frozen at -40 to -30°C for 3 hours, vacuum dried for 24 hours, and quickly dried to obtain a yellow-green solid. The output end of the third vacuum freeze dryer is connected to the third low-temperature ultrafine pulverizer, and the cell wall breaking technology is used to sieve 500-1000 lemon seed extract freeze-dried powder at a temperature of -10 to -5°C, and the freeze-dried powder is sealed and stored at 0-4°C.

[0045] The lemon micropowder prepared by the lemon micropowder preparation method in this embodiment has the following advantages:

[0046] 1. The lemon peel, lemon seeds and lemon juice are processed separately. In the later product application, the proportions can be adapted according to the different focuses of the products. For example, for the functions of supplementing Vc, the lemon seed freeze-dried powder is relatively weak, such as the proportion of whole fruit lemon powder disclosed in the background technology; for medicinal purposes such as inhibiting cancer, the proportion of lemon seed freeze-dried powder is increased; for the functions of lowering blood lipids and blood pressure, the proportion of lemon peel freeze-dried powder is increased, and the products are more diversified and enriched.

[0047] 2. In terms of preparation and processing, frozen whole lemon fruit is used. Compared with the whole lemon fruit / juiced peel residue crushed under low temperature environment, the nutrients of the whole lemon fruit in this embodiment have been locked by freezing before crushing, which can prevent the loss of volatile substances.

[0048] 3. In the processing of lemon seeds, a supercritical extraction step is added. Compared with the method of using whole fruit quick freezing-freeze drying-preparation of freeze-dried powder, it can further stimulate the extraction of effective ingredients in lemons (especially the medicinal value in lemon seeds). Through the extraction of medicinal ingredients in lemon seeds, the prepared products have better health effects in addition to traditional supplements of VC, so as to increase the value of later lemon micropowder products.

[0049] Second embodiment

[0050] The present embodiment provides an application of lemon micropowder, wherein the lemon micropowder preparation method disclosed in the first embodiment is used to prepare lemon peel freeze-dried powder, lemonade freeze-dried powder and / or lemon seed extract freeze-dried powder, respectively; the lemon peel freeze-dried powder, and / or lemonade freeze-dried powder and / or lemon seed extract freeze-dried powder are mixed in proportion and directly prepared into capsules, granules, tablets, powders or pills by conventional processes.

[0051] In the process of selecting by proportion, one or more of lemon peel freeze-dried powder, lemonade freeze-dried powder and lemon seed extract freeze-dried powder can be selected for reprocessing according to actual conditions. For example, in view of the product's anti-cancer effect, only lemon seed extract freeze-dried powder can be selected to make tablets or pills. If the comprehensiveness of the product is concerned, a mixed powder of the three freeze-dried powders can be selected. The proportion of the mixed powder can also be adaptively selected according to demand. It is not just the same as the micro-powder made from the original whole lemon fruit. The product is not targeted and tastes bitter.

[0052] The capsules, granules, tablets, powders or pills in this embodiment are made of 100% lemon freeze-dried powder, which can increase the lemon content entering the human body during a single intake, and the proportions of lemon peel freeze-dried powder, lemonade freeze-dried powder and lemon seed extract freeze-dried powder are adjustable, thereby improving product diversity and thus improving product value.

[0053] Third embodiment

[0054] This embodiment also provides an application of lemon micropowder, which still adopts the preparation method of the first embodiment to prepare lemon peel freeze-dried powder, and / or lemonade freeze-dried powder, and / or lemon seed extract freeze-dried powder, respectively, and adds conventional amounts of edible auxiliary materials to prepare cakes, desserts, biscuits, jellies and other snacks using conventional processes.

[0055] In this embodiment, in order to further improve the taste of the lemon micropowder, edible auxiliary materials such as flour and milk can be added to the 100% lemon freeze-dried powder to prepare products such as biscuits that people love to eat. Compared with the method in the second embodiment, it can be more easily accepted by users in terms of product appearance and taste. Although the lemon content entering the human body is less in a single intake, it can be accepted for multiple intakes, thereby further improving the health care effect of the lemon micropowder.

[0056] Moreover, the same freeze-dried powder types of lemon peel freeze-dried powder, lemonade freeze-dried powder and lemon seed extract freeze-dried powder are optional and the proportions are adjustable, so they can be made into delicious snacks of different types and values, which are easy for people to accept and ingest.

[0057] Fourth embodiment

[0058] This embodiment also provides an application of lemon micropowder, which still uses the preparation method of the first embodiment to prepare lemon peel freeze-dried powder, lemonade freeze-dried powder and / or lemon seed extract freeze-dried powder for preparing functional drinks or health drinks.

[0059] In this embodiment, another consumption method that is easily accepted by users is provided, that is, lemon peel freeze-dried powder, lemonade freeze-dried powder and / or lemon seed extract freeze-dried powder are used as powder additives in beverages. The amount of freeze-dried powder added is more than that of the traditional brewing method, so that a large amount of lemon active ingredients can be ingested while drinking water.

[0060] The same freeze-dried powder types of lemon peel freeze-dried powder, lemonade freeze-dried powder and lemon seed extract freeze-dried powder are optional and the proportions are adjustable. They can be made into drinks of different types and values ​​to bring out the value of lemons.

[0061] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for preparing lemon micropowder, characterized in that: The preparation method comprises: Peeling the whole lemon fruit without stems to obtain lemon peel and lemon pulp; The lemon peel is introduced into a first vacuum freeze dryer through a first low-temperature conveyor for rapid drying, the output end of the first vacuum freeze dryer is connected to a first low-temperature ultrafine pulverizer, and the vacuum freeze-dried lemon peel is ultrafinely pulverized at low temperatures to obtain lemon peel freeze-dried powder; The lemon pulp is introduced into a low-temperature cold press and sieved to obtain lemonade and lemon seeds respectively; The lemonade is introduced into a second vacuum freeze dryer for rapid drying, the output end of the second vacuum freeze dryer is connected to a second low-temperature ultrafine pulverizer, and the vacuum freeze-dried lemonade is ultrafinely pulverized at low temperatures to obtain freeze-dried lemonade powder; The lemon seeds are introduced into a supercritical extraction device for rapid extraction to obtain a lemon seed extract, and the lemon seed extract is introduced into a third vacuum freeze dryer for rapid drying. The output end of the third vacuum freeze dryer is connected to a third low-temperature ultrafine pulverizer to obtain a lemon seed extract freeze-dried powder.

2. The method for preparing lemon micropowder according to claim 1, characterized in that: The lemon pulp is also sliced ​​before being introduced into the low-temperature cold press.

3. The method for preparing lemon micropowder according to claim 1, characterized in that: The lemon peel freeze-dried powder, the lemonade freeze-dried powder and the lemon seed extract freeze-dried powder are 500-1000 mesh freeze-dried powders.

4. The method for preparing lemon micropowder according to claim 1, characterized in that: The whole lemon fruit without stems is the whole lemon fruit frozen at -10 to -5°C.

5. The method for preparing lemon micropowder according to claim 1, characterized in that: The vacuum freeze dryer is used for pre-freezing at -40°C for 3 hours, and the vacuum drying time is 24 hours.

6. The method for preparing lemon micropowder according to claim 1, characterized in that: The pulverizing temperature of the low-temperature ultrafine pulverizer is between -10 and -5°C.

7. The method for preparing lemon micropowder according to claim 1, characterized in that: The lemon peel freeze-dried powder, lemonade freeze-dried powder and lemon seed extract freeze-dried powder are sealed and stored in a refrigerator at 0-4°C.

8. An application of lemon micropowder, comprising: preparing lemon peel freeze-dried powder, lemonade freeze-dried powder, and / or lemon seed extract freeze-dried powder by the preparation method described in any one of claims 1 to 7, mixing the lemon peel freeze-dried powder, lemonade freeze-dried powder and lemon seed extract freeze-dried powder in proportion, and directly preparing them into capsules, granules, tablets, powders or pills by conventional processes.

9. An application of lemon micropowder, comprising preparing lemon peel freeze-dried powder and / or lemonade freeze-dried powder and / or lemon seed extract freeze-dried powder by the preparation method described in any one of claims 1 to 7, and adding conventional amounts of edible excipients to prepare capsules, granules, tablets, powders or pills by conventional processes.

10. An application of lemon micropowder, wherein the preparation method according to any one of claims 1 to 7 is used to prepare lemon peel freeze-dried powder, and / or lemonade freeze-dried powder, and / or lemon seed extract freeze-dried powder for preparing functional drinks or health products.

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