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Walnut oil and preparation method thereof

A technology of walnut oil and walnut, applied in the field of walnut oil processing, can solve the problems of not strong aroma of walnut oil, restricting the development of walnut oil industry, and low nutritional value of walnut oil, so as to retain beneficial nutrients, avoid dark color and reduce aroma the effect of the loss

Pending Publication Date: 2019-10-22
GUANGXI GRAIN & OIL SCI RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The walnut oil squeezed by the existing walnut oil pressing technology generally has low nutritional value, and the fragrance of the walnut oil is not strong, which greatly restricts the development of the walnut oil industry

Method used

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  • Walnut oil and preparation method thereof

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preparation example Construction

[0039] The invention provides a preparation method of walnut oil.

[0040] In one embodiment of the preparation method of walnut oil of the present invention, this preparation method comprises the following steps:

[0041] Step S10, using stack retting and peeling method or chemical peeling method to remove green skin from fresh walnut fruit to obtain walnut fruit, and wash and air-dry the walnut fruit;

[0042] Step S20, peeling the dried walnuts to obtain walnut kernels;

[0043] Step S30, using a high-pressure steam peeling method to remove the seed coat from the walnut kernel;

[0044] In step S40, a hydraulic pressing method is used to squeeze the walnut kernels after removing the seed coat to obtain walnut crude oil;

[0045] In step S50, the walnut crude oil is filtered and impurity-removed by low temperature separation method to obtain walnut crude oil, and the walnut crude oil is degummed, deacidified, decolorized, dewaxed and deodorized to obtain walnut oil.

[00...

Embodiment 1

[0081] In the present embodiment, walnut oil is prepared by the following steps:

[0082] (1) Preparation of walnut fruit: Place the fresh walnut fruit with a thickness of 40cm in a preset environment for stacking and retting for 7 days. The ambient temperature range of the preset environment is 23°C and the relative humidity is 80%. Wooden board knocks the fresh walnut fruit that has been separated from the shell or cracked, and obtains the walnut fruit; % ethephon aqueous solution, wherein the mass ratio of water and ethephon aqueous solution is 750:1, fresh walnuts are completely soaked in the peeling solution for 1 hour, then taken out, and placed in the preset environment with a thickness of less than 40cm Stack retting for 3 days, in which, the ambient temperature range of the preset environment is 23°C, and the relative humidity is 80%. After the green skin of the fresh walnut fruit is separated from the shell or cracked, the fresh walnut fruit that has been separated f...

Embodiment 2

[0088] In the present embodiment, walnut oil is prepared by the following steps:

[0089] (1) Preparation of walnut fruit: fresh walnut fruit is placed in a preset environment with a thickness of 50cm for stacking and retting for 7-8 days. The ambient temperature range value of the preset environment is 26° C., and the relative humidity is 85%. At this time, The fresh walnut fruit that has been separated from the shell or cracked is artificially knocked with a wooden board to obtain the walnut fruit; in one embodiment of the present invention, the fresh walnut fruit is soaked in a peeling solution for de-greening the fresh walnut fruit. The peeling solution is composed of clear water and content It is made of 40% ethephon water agent solution, wherein the mass ratio of clear water and ethephon water agent solution is 750:1. Fresh walnuts are completely soaked in the peeling solution for 1.5 hours, then taken out, and placed in a thickness of less than 40cm Stack retting for 3....

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Abstract

A preparation method of walnut oil comprises the steps of removing green peel of fresh walnuts to walnut fruits by a stack retting peeling method or an agent peeling method, cleaning and airing the walnut fruits, husking the aired walnut fruits to form walnut kernels, removing seed coats from the walnut kernels by a high pressure steam peeling method, pressing the walnut kernels after seed coat removal by a hydraulic pressing method to form raw walnut oil, performing filtration and purification on the raw walnut oil by a low temperature separation method at last to form a crude walnut oil, andperforming degumming, deacidification, decoloration and dewaxing treatment on the crude walnut oil to form the walnut oil. The crude walnut oil is prepared by the hydraulic pressing method and the low temperature separation method; a deep color and a burnt smell of the walnut oil due to a high temperature can be effectively avoided in a pressing process, so that the loss of fragrance of the walnut oil is reduced; at the same time, beneficial nutritional ingredients in the walnut oil are effectively maintained; and the walnut oil with a high nutritive value and an aromatic flavor is formed.

Description

technical field [0001] The invention relates to the technical field of walnut oil processing, in particular to a method for preparing walnut oil and walnut oil prepared by the method for preparing walnut oil. Background technique [0002] The oil content of walnut is as high as 65% to 70%, ranking first among all woody oil plants, and has the reputation of "oil depot on trees". Using modern technology to extract its essence, this is a new generation of walnut product - walnut oil. Walnut oil is a natural fruit juice made from high-quality walnuts as raw materials and using international leading technology. In the international market, walnut oil is known as "Oriental olive oil" and is favored by consumers just like olive oil. [0003] The walnut oil squeezed out by the existing walnut oil pressing technology generally has low nutritional value, and the fragrance of the walnut oil is not strong, which greatly restricts the development of the walnut oil industry. Contents ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B1/04C11B1/06C11B3/00
CPCC11B1/04C11B1/06C11B3/001
Inventor 韦素梅李炜刘运龙徐德林欧朝东黄文欧恺
Owner GUANGXI GRAIN & OIL SCI RES INST CO LTD
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