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Method for extracting maize germ oil assisted by ethyl alcohol and steam explosion

A corn germ oil and corn germ technology, which is applied in the production of edible oil/fat, fat oil/fat, and fat production, can solve the problems of waste of high-quality protein resources, low extraction rate of free oil, high cost, etc., and achieve shortened oil production. Period, active active ingredient retention, expensive effect

Active Publication Date: 2015-05-20
JIANGNAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for steam explosion and ethanol-assisted extraction of corn germ oil, which solves the problems of traditional oil extraction methods or low extraction rate of free oil or serious environmental pollution, high residual oil in the slag phase, waste of high-quality protein resources, enzyme Problems such as large amount and high cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The dry corn germ is not pretreated, only crushed, crushed with a traditional Chinese medicine grinder to a volume average particle size of about 184 μm, and then crushed with a roller compactor to a volume average particle size of about 35 μm to obtain oil extraction raw materials.

[0029] The oil-extracting raw materials are extracted at 60°C, according to the ratio of material to liquid 1:7 (w / v), the concentration of ethanol aqueous solution is 30% (v / v), and the pH of the system is adjusted to 9.0 for oil extraction, and the reaction time is 2h. Centrifuge at 5000rpm for 15min after the reaction to obtain incompatible four phases—free oil, emulsion, water phase and slag phase, obtain free corn germ oil with a scoop, and weigh it.

[0030] The extraction rate of free oil is only 77.83%, and the fat content of the residue phase accounts for 13.57% of the total oil.

Embodiment 2

[0032] Dry corn germ is not soaked in low-concentration citric acid solution, and the dry material is directly subjected to steam explosion treatment. The steam explosion pressure is set at 1.3MPa±0.1MPa, and the pressure holding time is 30s. After the blasting is over, the steam blasting machine collection bin is opened to collect the steam-exploded corn germ.

[0033] The steam-exploded corn germ is dried in a blast drying oven at 50°C; it is crushed with a traditional Chinese medicine grinder to a volume average particle size of about 170 μm, and then crushed with a roller compactor to a volume average particle size of about 41 μm to obtain oil extraction raw material.

[0034] The obtained raw material was extracted at 60°C with a material-to-liquid ratio of 1:7 (w / v), an ethanol aqueous solution concentration of 30% (v / v), and a system pH of 9.0 for oil extraction, and the reaction time was 2 hours. Centrifuge at 5000rpm for 15min after the reaction to obtain incompatibl...

Embodiment 3

[0037] The dry corn germ 1 was soaked in 0.1M citric acid solution for 3 hours according to the solid-to-liquid ratio of 1:1 (w / v), drained and the filtrate was discarded, and the soaked corn germ 2 was collected.

[0038] The corn germ 2 soaked with citric acid is subjected to steam explosion treatment, the steam explosion pressure is set at 0.5MPa±0.1MPa, and the pressure holding time is 120s. After the blasting is over, the steam blasting machine collection bin is opened to collect the corn germ 3 after the steam explosion.

[0039] The steam-exploded corn germ 3 was dried in a blast drying oven at 60°C; it was pulverized by a traditional Chinese medicine pulverizer to a volume average particle size of about 140 μm, and then crushed by a roller compactor to a volume average particle size of about 38 μm, resulting in improved Oil raw material (I).

[0040] The raw material (I) obtained in step (3) is carried out at 60°C, according to the ratio of material to liquid 1:4 (w / v...

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Abstract

The invention discloses a method for extracting maize germ oil assisted by ethyl alcohol and steam explosion and belongs to the technical field of elaborate processing of the agricultural and sideline products. The method comprises the steps of after using low-concentration citric acid solution to immerse the maize, adopting the steam explosion method to greatly shorten the thermal processing time; adopting ethyl alcohol solution as oil extracting medium and adopting a demulsifier to substitute plenty of enzymes used in the traditional aqueous enzymatic method so as to save the production cost and modify the quality of the product. The method used in the invention has the advantages of high oil extracting efficiency, low cost and high quality, and solves the problems of low oil extracting efficiency, high cost and long period of maize germ oil extracting process in the traditional aqueous enzymatic method.

Description

technical field [0001] The invention relates to a method for steam explosion and ethanol-assisted extraction of corn germ oil, which belongs to the technical field of fine processing of agricultural and sideline products. Background technique [0002] Corn germ is a by-product of the alcohol industry and corn starch industry. China's annual output is about 1.4 million tons. Corn germ contains 35-57% oil, 17-28% crude protein, 7-16% ash, 1.5-5.5% starch and 7.0% cellulose. At present, about 300,000 tons of corn germ are used for oil production in China every year, and the output of corn germ oil is nearly 120,000 tons. The unsaturated fatty acid content of corn germ oil accounts for more than 80%, of which oleic acid is more than 60%, and the VE content ranks first in vegetable oil. Long-term consumption is of great benefit to the human body, and it is known as "nutrition and health oil". [0003] At present, the production methods of corn germ oil include pressing method, ...

Claims

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Application Information

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IPC IPC(8): C11B1/10C11B1/04A23D9/02
CPCC11B1/04C11B1/104A23D9/02C11B1/10
Inventor 杨瑞金倪双双张益奇李鹏飞张文斌赵伟华霄
Owner JIANGNAN UNIV
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