阅读说明：本技术 一种核桃油加工方法 (Processing method of walnut oil ) 是由 王纯江 于 2019-09-18 设计创作，主要内容包括：本发明属于核桃油制备技术领域,提供了一种核桃油加工方法。该核桃油加工方法包括：(1)将核桃仁原料与水混合得到一次混合料,调节一次混合料；向一次混合料中加入第一复合酶得到第一混合物；(2)将第一混合物微波处理,离心分离得到一次残渣和一次核桃油；(3)将一次残渣与水混合得到二次混合料,调节二次混合料的pH；向二次混合料中加入第二复合酶得到第二混合物；(4)将第二混合物微波处理,离心分离得到二次残渣和二次核桃油；(5)混合一次核桃油和二次核桃油得到核桃油。本发明的目的在于提供一种核桃油加工方法,通过该加工方法提取的核桃油的提取率高、残油率低、得到的核桃油质量稳定、风味好。(The invention belongs to the technical field of walnut oil preparation, and provides a walnut oil processing method. The processing method of the walnut oil comprises the following steps: (1) mixing the walnut kernel raw material with water to obtain a primary mixture, and adjusting the primary mixture; adding a first complex enzyme into the primary mixture to obtain a first mixture; (2) performing microwave treatment on the first mixture, and performing centrifugal separation to obtain primary residue and primary walnut oil; (3) mixing the primary residue with water to obtain a secondary mixture, and adjusting the pH value of the secondary mixture; adding a second complex enzyme into the secondary mixture to obtain a second mixture; (4) performing microwave treatment on the second mixture, and performing centrifugal separation to obtain secondary residue and secondary walnut oil; (5) mixing the primary walnut oil and the secondary walnut oil to obtain the walnut oil. The invention aims to provide a processing method of walnut oil, which has high extraction rate and low residual oil rate of the walnut oil extracted by the processing method, and the obtained walnut oil has stable quality and good flavor.)

1. A processing method of walnut oil is characterized by comprising the following steps: the method comprises the following steps:

(1) mixing walnut kernel raw materials and water according to a mass ratio of 2.2-3: 1, mixing to obtain a primary mixture, and adjusting the pH of the primary mixture to 6.8-10; adding a first complex enzyme into the primary mixture to obtain a first mixture, wherein the mass ratio of the primary mixture to the first complex enzyme is 1: 0.2-0.3; the first complex enzyme comprises cellulase and alkaline protease in a mass ratio of 1: 2-3;

(2) subjecting the first mixture to microwave treatment for 8-12min at 55-60 ℃, 500W/L microwave power and 150rpm stirring speed, wherein the microwave power is 450-;

(3) mixing the primary residue with water according to the mass ratio of 1:0.8-1 to obtain a secondary mixture, and adjusting the pH value of the secondary mixture to 2-4; adding a second complex enzyme into the secondary mixture to obtain a second mixture, wherein the mass ratio of the secondary mixture to the second complex enzyme is 1: 0.2-0.3; the second complex enzyme comprises hemicellulase and acid protease in a mass ratio of 1: 2-3;

(4) subjecting the second mixture to microwave treatment at 58-62 ℃, microwave power of 550-;

(5) and mixing the primary walnut oil and the secondary walnut oil to obtain the walnut oil.

2. The walnut oil processing method of claim 1, further comprising: the walnut kernel raw material is obtained by grinding peeled walnut kernels into slurry.

3. The walnut oil processing method of claim 1, further comprising: in the step (1), the pH of the primary mixture is adjusted by using sodium hydroxide.

4. The walnut oil processing method of claim 1, further comprising: in the step (3), the pH value of the primary mixture is adopted.

5. The walnut oil processing method of claim 1, further comprising: the alkaline protease comprises at least one of bacillus protease, streptomyces protease and subtilisin.

6. The walnut oil processing method of claim 1, further comprising: the acidic protease includes aspergillus niger protease.

Technical Field

The invention belongs to the technical field of walnut oil preparation, and particularly relates to a processing method of walnut oil.

Background

The walnut oil has the following effects: (1) the walnut oil has the functions of body building: this is because walnuts can provide sufficient heat; according to data calculation, each 100 g of walnut kernels can provide about 630 kilocalories of heat, which is 3-4 times of that of rice; (2) the walnut oil has the function of moistening the skin: the walnut oil is rich in squash with excellent affinity with skin and essential fatty acid for human body; the skin care product is quickly absorbed, and effectively keeps the skin elastic and moist; (3) the walnut oil has the functions of maintaining beauty and keeping young: the walnut oil is rich in fatty acid necessary for human bodies and is also rich in squalene with strong affinity with skin; the two substances can be quickly absorbed by the skin, and the elasticity and the luster of the skin can be effectively protected; can eliminate facial wrinkles and prevent skin aging; (4) the walnut oil has the effects of beautifying and protecting hair: the hair of children can be blackened by eating more walnut oil; (5) the walnut oil has the functions of strengthening and nourishing brain: the walnut oil does not contain cholesterol, so that the occurrence of senile dementia can be effectively prevented; the abundant linoleic acid and linolenic acid can remove the impurities metabolized in blood vessels, purify blood and provide fresh blood for brains; (6) the walnut oil has the effect of preventing cardiovascular and cerebrovascular diseases: the walnut oil can prevent arteriosclerosis and arteriosclerosis complications, hypertension, heart disease, heart failure, renal failure, and cerebral hemorrhage; (7) the walnut oil has the function of improving the endocrine system: this is because dha in walnut oil can increase the sensitivity of insulin, and when the content of unsaturated fatty acid in cells is higher, the number of double bonds is more, and the activity is stronger; (8) the walnut oil has the following effects of supplementing calcium to a bone system: the natural antioxidant and omega-3 fatty acid in oleum Juglandis are helpful for human body to absorb minerals such as calcium, phosphorus, zinc, etc., and can promote bone growth and maintain bone density.

The most common method for preparing walnut oil is by pressing. However, the conventional pressing method has the following disadvantages: the active ingredients in the walnut oil are easy to damage, the walnut oil obtained by squeezing needs to be further refined, and the active ingredients of the walnut oil can be further damaged in the refining process. In the prior art, the walnut oil is extracted by adopting an aqueous enzymatic method, although the activity of the walnut oil can be maintained, the treatment time is longer, and the extraction rate is not very high.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide the walnut oil processing method, the walnut oil extracted by the processing method has high extraction rate and low residual oil rate, and the obtained walnut oil has stable quality and good flavor.

In order to achieve the above purpose, the solution adopted by the invention is as follows:

a processing method of walnut oil comprises the following steps: (1) mixing walnut kernel raw materials and water according to a mass ratio of 2.2-3: 1, mixing to obtain a primary mixture, and adjusting the pH of the primary mixture to 6.8-10; adding a first complex enzyme into the primary mixture to obtain a first mixture, wherein the mass ratio of the primary mixture to the first complex enzyme is 1: 0.2-0.3; the first compound enzyme comprises cellulase and alkaline protease in a mass ratio of 1: 2-3; (2) subjecting the first mixture to microwave treatment at 55-60 deg.C, microwave power of 450-; (3) mixing the primary residue with water according to the mass ratio of 1:0.8-1 to obtain a secondary mixture, and adjusting the pH value of the secondary mixture to 2-4; adding a second complex enzyme into the secondary mixture to obtain a second mixture, wherein the mass ratio of the secondary mixture to the second complex enzyme is 1: 0.2-0.3; the second complex enzyme comprises hemicellulase and acid protease in a mass ratio of 1: 2-3; (4) subjecting the second mixture to microwave treatment at 58-62 deg.C with microwave power of 550-; (5) mixing the primary walnut oil and the secondary walnut oil to obtain the walnut oil.

Further, in the preferred embodiment of the present invention, the walnut kernel is obtained by grinding peeled walnut kernels.

Further, in the preferred embodiment of the invention, the pH of the sodium hydroxide primary mix is used.

Further, in the preferred embodiment of the invention, the pH of the primary mix of citric acid or hydrochloric acid is used.

Further, in preferred embodiments of the present invention, the alkaline protease comprises at least one of a bacillus protease, a streptomyces protease, and a subtilisin.

Further, in preferred embodiments of the present invention, the acid protease comprises Aspergillus niger protease.

The invention has the beneficial effects that:

(1) the processing method of the walnut oil provided by the invention adopts a mild enzyme method treatment process, can greatly retain active ingredients in the walnut oil, can fully extract the walnut oil in the residue through two enzyme methods, and greatly improves the extraction rate; the enzymatic treatment is matched with the microwave treatment, so that the enzymolysis time can be greatly shortened, and the production efficiency can be improved.

(2) According to the invention, the first compound enzyme and the second compound enzyme are adopted for enzymolysis, so that the cell walls of the walnut kernels can be fully utilized, the grease in the cells can be more easily extracted, and the extraction rate of the walnut oil can be effectively improved compared with single one-time enzymolysis.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.

The features and properties of the present invention are described in further detail below with reference to examples.