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Method for preparing oil from whole grains of corns

A technology of corn kernels and corn oil, applied in the direction of edible oil/fat, food science, application, etc., can solve the problems of nutritional value discount, long process route, and loss of corn oil nutrients, so as to simplify the production process and reduce production costs , the effect of reducing adverse effects

Inactive Publication Date: 2015-05-06
南宁市桂福园农业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problems that exist in the method for existing corn oil production are: (1) the freshness of corn germ is poor, can not obtain high-quality corn oil
The main reason is that corn germ is a by-product of corn processing. The extracted germ needs to be accumulated for a period of time to reach a certain amount before it can be squeezed to make oil. If the corn germ is stored for too long, it will not only cause oil loss, but also be hydrolyzed by lipolytic enzymes. As a result, the lipids in the corn germ undergo hydrolysis and rancidity, resulting in a low oil yield. Therefore, the quality of the crude oil obtained is poor, the color of the corn oil becomes darker, the acid value increases, and it produces spicy and peculiar smells. It must be further refined before it can be eaten. , resulting in the loss of a lot of nutrients in corn oil, and the nutritional value is greatly reduced
In addition, when the moisture content of corn germ is high, it is easy to produce mildew, and the moldy corn germ may contain aflatoxin, and the safety of the corn oil obtained from it is not guaranteed.
(2) The process route is long and the process is complicated. The quality of the production technology of each process link also directly affects the quality of corn oil, and at the same time increases the investment cost, production cost and energy consumption of equipment

Method used

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  • Method for preparing oil from whole grains of corns

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] An example of the method for producing oil from corn whole grains of the present invention comprises the steps of:

[0025] Roast the screened plump corn kernels at 90°C for 1.4 hours, and the moisture content of the kernels is 7.2%; press the roasted corn kernels at a temperature of 90°C and a pressure of 45MPa; the squeezed oil juice Use a 150-mesh stainless steel screen to separate the oil residue, mix the separated residue and corn kernels at a ratio of 1:8 and press, heat the separated oil to 90°C at a stirring speed of 60r / min, and keep it warm for 0.5h; After layering, the oil is separated, and then fine-filtered with a 500-mesh filter cloth. The fine-filtered corn oil is cooled to room temperature, and stored away from light in a ventilated, dry, and hygienic environment. The main technical indicators of the corn oil obtained are as follows:

[0026] Color (Lovibond color cell 25.4mm): Y=30, R=4.9; acid value (KOH, mg / g): 2.5; peroxide value (mg / kg): 5.0; solve...

Embodiment 2

[0028] Another example of the method for producing oil from corn whole grains of the present invention comprises the following steps:

[0029] Roast the screened plump corn kernels at 100°C for 1.2 hours, and the moisture content of the kernels is 7.0%; press the roasted corn kernels at a pressing temperature of 100°C and a pressure of 40MPa; the squeezed oil juice Use a 160-mesh stainless steel screen to separate the oil residue, mix the separated residue and corn kernels at a ratio of 1:7 and then press, heat the separated oil to 100°C at a stirring speed of 60r / min, and keep it warm for 0.5h; After layering, the oil is separated, and then fine-filtered with a 500-mesh filter cloth. The fine-filtered corn oil is cooled to room temperature, and stored away from light in a ventilated, dry, and hygienic environment. The main technical indicators of the corn oil obtained are as follows:

[0030] Color (Lovibond color cell 25.4mm): Y=30, R=5.0; acid value (KOH, mg / g): 2.7; perox...

Embodiment 3

[0032] Another example of the method for producing oil from corn whole grains of the present invention comprises the following steps:

[0033] The screened plump corn kernels were roasted at 110°C for 1.1h, and the moisture content of the kernels was 6.6%; the roasted corn kernels were squeezed at a pressing temperature of 110°C and a pressure of 45MPa; the squeezed oil juice Use a 180-mesh stainless steel screen to separate the oil residue, mix the separated residue and corn kernels at a ratio of 1:9 and press, heat the separated oil to 110°C at a stirring speed of 50r / min, and keep it warm for 0.5h; After layering, the oil is separated, and then fine-filtered with a 450-mesh filter cloth. The fine-filtered corn oil is cooled to room temperature, and stored away from light in a ventilated, dry, and hygienic environment. The main technical indicators of the corn oil obtained are as follows:

[0034] Color (Lovibond color cell 25.4mm): Y=30, R=5.0; acid value (KOH, mg / g): 2.7;...

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Abstract

The invention discloses a method for preparing oil from the whole grains of corns. The corn oil is produced by the procedures of as the whole grains of the corns are used as materials, removing impurities, sieving for classification, roasting, squeezing, primarily filtering, carrying out heat treatment, separating, precisely filtering, cooling and storing. The method disclosed by the invention has the advantages that the freshness and the quality of the materials for preparing the corn oil are effectively guaranteed, the sections of extracting germs, pretreating the corn germs, deeply refining and the like in an existing corn-oil preparation technology are omitted, the production process of the corn oil is simplified, the investment for equipment and facilities is greatly reduced, the production process of the corn oil is shortened, and nutritional substances in the corn oil are retained as possible, so that the high-quality corn oil is obtained and the production cost and the energy consumption are reduced.

Description

technical field [0001] The invention relates to the field of oil processing, in particular to a method for producing oil from whole corn kernels. Background technique [0002] Corn oil is corn germ oil. It is an oil made from corn germ. It has a golden color and an aromatic smell. Corn oil is rich in unsaturated fatty acids necessary for the human body. The content of unsaturated fatty acids is more than 80%, mainly linoleic acid and oleic acid. Among them, linoleic acid accounts for more than 50% of the total amount of oil, and the content of oleic acid is about 30%. Corn oil is also rich in physiologically active substances such as phytosterols (content up to 1.1%) and vitamin E (content up to 0.99%), It has high nutritional value, and its absorption rate is as high as 97%. It is a recognized healthy edible oil at home and abroad. Its main functions are to lower human cholesterol, lower blood pressure, soften blood vessels, increase human muscle, heart, and cardiovascular ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23D9/04
Inventor 李秋庭陆顺忠关继华黎贵卿邱米吴建文时胜德谭桂菲唐宾梁剑宋钢廖忠柳苏丽华党中广
Owner 南宁市桂福园农业有限公司
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