阅读说明：本技术 一种香榧油的制备方法 (Preparation method of Chinese torreya oil ) 是由 毛董浩 于 2021-09-30 设计创作，主要内容包括：本发明提供了一种香榧油的制备方法,包括以下步骤：A1、收集去壳：将采收的香榧经脱皮、堆制后熟、晒干,得到的香榧子去除籽壳得香榧种仁,同时收集香榧子籽壳,待用；A2、低温干燥：对香榧种仁和香榧子籽壳进行挑选后,对挑选后的香榧种仁进行日晒或低温干燥至含水率≤6％；A3、机械低温压榨；A4、过滤净化：对香榧原油进行压滤,得香榧压榨油,并通过保温箱进行保存；A5、添加调和油,香榧原油与调和油的质量比为8-10：1；A6、冬化,本发明通过在香榧油重加入调和油,在保证香榧油的原本品质的前提下,还能兼具玉米油与米糠油这类调和油的属性,从而抑制血液中胆固醇的升高,提高油脂的氧化稳定性。(The invention provides a preparation method of Chinese torreya oil, which comprises the following steps: a1, collecting and shelling: peeling, stacking, cooking and drying the harvested Chinese torreya to obtain Chinese torreya seeds, removing seed shells of the Chinese torreya seeds to obtain Chinese torreya seed kernels, and collecting the Chinese torreya seed shells for later use; a2, low-temperature drying: selecting Chinese torreya kernels and Chinese torreya seed shells, and sun-drying or low-temperature drying the selected Chinese torreya kernels until the water content is less than or equal to 6%; a3, mechanical low-temperature pressing; a4, filtering and purifying: performing filter pressing on the torreya grandis crude oil to obtain torreya grandis pressed oil, and storing through an insulation can; a5, adding blend oil, wherein the mass ratio of the Chinese torreya crude oil to the blend oil is (8-10): 1; a6, winterization, the invention can also have the properties of blend oil such as corn oil and rice bran oil on the premise of ensuring the original quality of the Chinese torreya oil by adding the blend oil into the Chinese torreya oil, thereby inhibiting the increase of cholesterol in blood and improving the oxidation stability of oil.)

1. A preparation method of Chinese torreya oil is characterized by comprising the following steps:

a1, collecting and shelling: peeling, stacking, cooking and drying the harvested Chinese torreya to obtain Chinese torreya seeds, removing seed shells of the Chinese torreya seeds to obtain Chinese torreya seed kernels, and collecting the Chinese torreya seed shells for later use;

a2, low-temperature drying: selecting Chinese torreya kernels and Chinese torreya seed shells, and sun-drying or low-temperature drying the selected Chinese torreya kernels until the water content is less than or equal to 6%;

a3, mechanical low-temperature pressing: controlling the water content of the torreya grandis seeds to be 3-6%, mixing the torreya grandis seeds and torreya grandis seed shells, conveying to a squeezer, and squeezing at low temperature to obtain torreya grandis crude oil; the mass ratio of the Chinese torreya seed kernels to the Chinese torreya seed shells is 16-20: 1, mixing; the temperature of a pressing chamber of a squeezer is 70-90 ℃;

a4, filtering and purifying: performing filter pressing on the torreya grandis crude oil to obtain torreya grandis pressed oil, and storing through an insulation can;

a5, adding blend oil: adding blending oil into the torreya grandis pressed oil obtained in A4, mixing and stirring uniformly, keeping the temperature of the torreya grandis pressed oil in the heat insulation box at 60-70 ℃ in the process of adding the blending oil, and controlling the mass ratio of the torreya grandis crude oil to the blending oil to be 8-10: 1;

a6, winterization: injecting the squeezed oil into a winterization pot, slowly cooling to 4 ℃ for winterization, filtering the obtained winterized oil, repeating the winterization once, and filtering to obtain torreya grandis finished oil; the cooling rate is controlled to be 1-4 ℃/h, and the winterization time is at least 24 h.

2. The method for preparing torreya grandis oil according to claim 1, wherein in the step A2, the low-temperature drying temperature is controlled to be 30-65 ℃.

3. The preparation method of torreya grandis oil according to claim 1, wherein in the step A4, a filter press is adopted for filter pressing, the filter press temperature is 40-60 ℃, and the pressure is 0.4-0.6 MPa.

4. The preparation method of torreya grandis oil according to claim 1, wherein in the step A6, a filter press is adopted for filter pressing, the filter press temperature is 40-60 ℃, and the pressure is 0.4-0.6 MPa.

5. The method for preparing Chinese torreya oil according to claim 1, wherein in the step A5, the components of the blend oil comprise corn oil and rice bran oil, and the mass ratio of the corn oil to the rice bran oil is in the range of 1/3-1.

6. The method for preparing torreya grandis oil according to claim 1, wherein in the step A6, the cooling rate at the initial stage of cooling is controlled to be 3-4 ℃/h, and when the squeezed oil is cooled to 30-40 ℃, the cooling rate is reduced to be 1-2 ℃/h.

Technical Field

The invention relates to the technical field of Chinese torreya production and processing, and particularly relates to a preparation method of Chinese torreya oil.

Background

Chinese torreya, also known as Feizhu, is a evergreen arbor of Taxiales, Taxaceae and Torreya, and Chinese native tree species are rare economic tree species in the world, the fruit of Chinese torreya is nut, the nutritive value is very high, the dry fruit is called Chinese torreya seed, olive shape, the fruit shell is hard, the interior of the fruit shell is coated with light yellow pulp, the fruit can be eaten, the nutrition is rich, and the harvested Chinese torreya needs to be aired, dried and then stored or processed subsequently.

The torreya grandis oil pressing technology generally comprises the following steps: selecting, shelling, removing impurities, crushing, steaming, frying, extracting oil, finally squeezing to separate oil from oil, squeezing by a squeezer, and purifying by filtering. However, the Chinese torreya fruit shell is abandoned in the oil pressing mode, so that the nutrition utilization rate of the Chinese torreya fruit is not high, and the finally pressed Chinese torreya oil is single in quality and is difficult to adapt to the requirements of people at present.

Therefore, the Chinese torreya oil pressing mode in the prior art needs to be improved.

Disclosure of Invention

In order to solve the technical problems, the embodiment of the invention provides a preparation method of Chinese torreya oil, which comprises the following steps:

a1, collecting and shelling: peeling, stacking, cooking and drying the harvested Chinese torreya to obtain Chinese torreya seeds, removing seed shells of the Chinese torreya seeds to obtain Chinese torreya seed kernels, and collecting the Chinese torreya seed shells for later use;

a2, low-temperature drying: selecting Chinese torreya kernels and Chinese torreya seed shells, and sun-drying or low-temperature drying the selected Chinese torreya kernels until the water content is less than or equal to 6%;

a3, mechanical low-temperature pressing: controlling the water content of the torreya grandis seeds to be 3-6%, mixing the torreya grandis seeds and torreya grandis seed shells, conveying to a squeezer, and squeezing at low temperature to obtain torreya grandis crude oil; the mass ratio of the Chinese torreya seed kernels to the Chinese torreya seed shells is 16-20: 1, mixing; the temperature of a pressing chamber of a squeezer is 70-90 ℃;

a4, filtering and purifying: performing filter pressing on the torreya grandis crude oil to obtain torreya grandis pressed oil, and storing through an insulation can;

a5, adding blend oil: adding blending oil into the torreya grandis pressed oil obtained in A4, mixing and stirring uniformly, keeping the temperature of the torreya grandis pressed oil in the heat insulation box at 60-70 ℃ in the process of adding the blending oil, and controlling the mass ratio of the torreya grandis crude oil to the blending oil to be 8-10: 1;

a6, winterization: injecting the squeezed oil into a winterization pot, slowly cooling to 4 ℃ for winterization, filtering the obtained winterized oil, repeating the winterization once, and filtering to obtain torreya grandis finished oil; the cooling rate is controlled to be 1-4 ℃/h, and the winterization time is at least 24 h.

Further, in the step A2, the low-temperature drying temperature is controlled to be 30-65 ℃.

Further, in the step A4, a filter press is adopted for filter pressing, wherein the filter pressing temperature is 40-60 ℃, and the pressure is 0.4-0.6 Mpa.

Further, in the step A6, a filter press is adopted for filter pressing, wherein the filter pressing temperature is 40-60 ℃, and the pressure is 0.4-0.6 Mpa.

Further, in the step A5, the blend oil comprises corn oil and rice bran oil, and the ratio of the corn oil to the rice bran oil is 1/3-1.

Further, in the step A6, the cooling rate at the initial cooling stage is controlled to be 3-4 ℃/h, and when the squeezed oil is cooled to 30-40 ℃, the cooling rate is reduced to be 1-2 ℃/h.

The invention has the beneficial effects that:

1) according to the invention, a low-temperature drying mode is adopted, so that the water content of the Chinese torreya oil can be effectively reduced, and the oil loss caused by overhigh temperature can be prevented.

2) According to the invention, the blended oil is added into the Chinese torreya oil, so that the properties of the blended oil such as corn oil and rice bran oil can be combined on the premise of ensuring the original quality of the Chinese torreya oil, the increase of cholesterol in blood is inhibited, and the oxidation stability of oil is improved.

3) In the cooling process, the cooling rate is reduced from high to low, and when the pressed oil is cooled to 30-40 ℃, the cooling rate is reduced to 1-2 ℃/h, so that the mixing state of the Chinese torreya oil and the blend oil is more uniform and natural, and the use of the Chinese torreya oil cannot be influenced; the cooling rate in the early stage of cooling is higher than that in the later stage, and the processing efficiency of the product can be improved on the premise of not influencing the product quality.

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

fig. 1 is a process flow diagram of a preparation method of torreya grandis oil in the embodiment of the invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.

Referring to fig. 1, fig. 1 is a process flow diagram of a preparation method of torreya grandis oil in the embodiment of the invention.

Embodiment mode 1

A preparation method of Chinese torreya oil is characterized by comprising the following steps:

a1, collecting and shelling: peeling, stacking, cooking and drying the harvested Chinese torreya to obtain Chinese torreya seeds, removing seed shells of the Chinese torreya seeds to obtain Chinese torreya seed kernels, and collecting the Chinese torreya seed shells for later use;

a2, low-temperature drying: selecting Chinese torreya kernels and Chinese torreya seed shells, and then sun-drying or low-temperature drying the selected Chinese torreya kernels until the water content is less than or equal to 6%, wherein the low-temperature drying temperature is controlled at 30-65 ℃;

a3, mechanical low-temperature pressing: controlling the water content of the Chinese torreya kernels to be 3%, mixing the Chinese torreya kernels with Chinese torreya seed shells, conveying to a squeezer, and squeezing at low temperature to obtain Chinese torreya crude oil; the mass ratio of the Chinese torreya seed kernels to the Chinese torreya seed shells is 16: 1, mixing; the temperature of a pressing chamber of a squeezer is 70-90 ℃;

a4, filtering and purifying: performing filter pressing on the torreya grandis crude oil to obtain torreya grandis pressed oil, storing the torreya grandis pressed oil through an insulation can, and performing filter pressing by using a filter press, wherein the filter pressing temperature is 40-60 ℃, and the pressure is 0.4-0.6 Mpa;

a5, adding blend oil: adding blend oil into the torreya grandis pressed oil obtained in A4, uniformly mixing, and keeping the temperature of the torreya grandis pressed oil in the heat insulation box at 60-70 ℃ in the process of adding the blend oil, wherein the mass ratio of the torreya grandis crude oil to the blend oil is 10: 1, the blend oil comprises corn oil and rice bran oil, and the mass ratio of the corn oil to the rice bran oil is 1;

a6, winterization: injecting the squeezed oil into a winterization pot, slowly cooling to 4 ℃ for winterization, performing filter pressing on the obtained winterized oil, performing filter pressing by using a filter press in practical use, performing repeated winterization once at the filter pressing temperature of 40-60 ℃ and the pressure of 0.4-0.6 Mpa, and filtering to obtain torreya grandis finished oil; the cooling rate is controlled to be 1-4 ℃/h, and the winterization time is at least 24 h; the cooling rate at the initial cooling stage is controlled to be 3-4 ℃/h, and when the squeezed oil is cooled to 30-40 ℃, the cooling rate is reduced to be 1-2 ℃/h.

Embodiment mode 2

A preparation method of Chinese torreya oil is characterized by comprising the following steps:

a1, collecting and shelling: peeling, stacking, cooking and drying the harvested Chinese torreya to obtain Chinese torreya seeds, removing seed shells of the Chinese torreya seeds to obtain Chinese torreya seed kernels, and collecting the Chinese torreya seed shells for later use;

a2, low-temperature drying: selecting Chinese torreya kernels and Chinese torreya seed shells, and then sun-drying or low-temperature drying the selected Chinese torreya kernels until the water content is less than or equal to 6%, wherein the low-temperature drying temperature is controlled at 30-65 ℃;

a3, mechanical low-temperature pressing: controlling the water content of the Chinese torreya kernels to be 3%, mixing the Chinese torreya kernels with Chinese torreya seed shells, conveying to a squeezer, and squeezing at low temperature to obtain Chinese torreya crude oil; the mass ratio of the Chinese torreya seed kernels to the Chinese torreya seed shells is 18: 1, mixing; the temperature of a pressing chamber of a squeezer is 70-90 ℃;

a4, filtering and purifying: performing filter pressing on the torreya grandis crude oil to obtain torreya grandis pressed oil, storing the torreya grandis pressed oil through an insulation can, and performing filter pressing by using a filter press, wherein the filter pressing temperature is 40-60 ℃, and the pressure is 0.4-0.6 Mpa;

a5, adding blend oil: adding blending oil into the torreya grandis pressed oil obtained in A4, uniformly mixing, and keeping the temperature of the torreya grandis pressed oil in the heat insulation box at 60-70 ℃ in the process of adding the blending oil, wherein the mass ratio of the torreya grandis crude oil to the blending oil is 9: 1, the blend oil comprises corn oil and rice bran oil, and the mass ratio of the corn oil to the rice bran oil is 2/3;

a6, winterization: injecting the squeezed oil into a winterization pot, slowly cooling to 4 ℃ for winterization, performing filter pressing on the obtained winterized oil, performing filter pressing by using a filter press in practical use, performing repeated winterization once at the filter pressing temperature of 40-60 ℃ and the pressure of 0.4-0.6 Mpa, and filtering to obtain torreya grandis finished oil; the cooling rate is controlled to be 1-4 ℃/h, and the winterization time is at least 24 h; the cooling rate at the initial cooling stage is controlled to be 3-4 ℃/h, and when the squeezed oil is cooled to 30-40 ℃, the cooling rate is reduced to be 1-2 ℃/h.

Embodiment 3

A preparation method of Chinese torreya oil is characterized by comprising the following steps:

a1, collecting and shelling: peeling, stacking, cooking and drying the harvested Chinese torreya to obtain Chinese torreya seeds, removing seed shells of the Chinese torreya seeds to obtain Chinese torreya seed kernels, and collecting the Chinese torreya seed shells for later use;

a2, low-temperature drying: selecting Chinese torreya kernels and Chinese torreya seed shells, and then sun-drying or low-temperature drying the selected Chinese torreya kernels until the water content is less than or equal to 6%, wherein the low-temperature drying temperature is controlled at 30-65 ℃;

a3, mechanical low-temperature pressing: controlling the water content of the Chinese torreya kernels to be 3%, mixing the Chinese torreya kernels with Chinese torreya seed shells, conveying to a squeezer, and squeezing at low temperature to obtain Chinese torreya crude oil; the mass ratio of the Chinese torreya seed kernels to the Chinese torreya seed shells is 20: 1, mixing; the temperature of a pressing chamber of a squeezer is 70-90 ℃;

a4, filtering and purifying: performing filter pressing on the torreya grandis crude oil to obtain torreya grandis pressed oil, storing the torreya grandis pressed oil through an insulation can, and performing filter pressing by using a filter press, wherein the filter pressing temperature is 40-60 ℃, and the pressure is 0.4-0.6 Mpa;

a5, adding blend oil: adding blending oil into the torreya grandis pressed oil obtained in A4, uniformly mixing, and keeping the temperature of the torreya grandis pressed oil in the heat insulation box at 60-70 ℃ in the process of adding the blending oil, wherein the mass ratio of the torreya grandis crude oil to the blending oil is 8: 1, the blend oil comprises corn oil and rice bran oil, and the mass ratio of the corn oil to the rice bran oil is 1/3;

a6, winterization: injecting the squeezed oil into a winterization pot, slowly cooling to 4 ℃ for winterization, performing filter pressing on the obtained winterized oil, performing filter pressing by using a filter press in practical use, performing repeated winterization once at the filter pressing temperature of 40-60 ℃ and the pressure of 0.4-0.6 Mpa, and filtering to obtain torreya grandis finished oil; the cooling rate is controlled to be 1-4 ℃/h, and the winterization time is at least 24 h; the cooling rate at the initial cooling stage is controlled to be 3-4 ℃/h, and when the squeezed oil is cooled to 30-40 ℃, the cooling rate is reduced to be 1-2 ℃/h.

In practice, any temperature and pressure within the above disclosed ranges may be practiced and the three embodiments are merely a limited list, but are not limited to these three embodiments.

In the description herein, references to the description of the terms "one embodiment," "certain embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.