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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  • Summary
  • 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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0027] Example 1

[0028] The dried corn germ is crushed without any pretreatment, and crushed to a volume average particle size of about 184μm with a Chinese medicine pulverizer, and then crushed to a volume average particle size of about 35μm with a roller compactor to obtain the raw material for oil extraction.

[0029] The oil extraction raw materials were adjusted to a pH of 9.0 for oil extraction at a material-to-liquid ratio of 1:7 (w / v) at a ratio of 1:7 (w / v), and the pH of the system was adjusted to 9.0. The reaction time was 2 hours. After the reaction is finished, centrifuge at 5000 rpm for 15 minutes to obtain four incompatible phases-free oil, emulsion, water phase and residue phase. Free corn germ oil is obtained and weighed.

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

Example Embodiment

[0031] Example 2

[0032] Dry corn germs are not soaked in low-concentration citric acid solution, and the dry materials are directly subjected to steam explosion treatment, and the steam explosion pressure is set to 1.3MPa±0.1MPa, and the pressure holding time is 30s. After the blasting is over, open the steam blaster collection bin to collect the corn germ after steam explosion.

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

[0034] The obtained raw materials were adjusted to pH 9.0 for oil extraction at a material-to-liquid ratio of 1:7 (w / v) at a ratio of 1:7 (w / v), and the pH of the system was adjusted to 9.0. The reaction time was 2 hours. After the reaction is finished, centrifuge at 5000 rpm for 15 minutes to obtain four inco...

Example Embodiment

[0036] Example 3

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

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

[0039] The corn germ 3 after steam explosion is dried in a blast drying oven at 60°C; it is crushed to a volume average particle size of about 140μm using a Chinese medicine pulverizer, and then crushed to a volume average particle size of about 38μm using a roller compactor to obtain an extraction Oil feedstock (I).

[0040] The raw material (I) obtained in step (3) is at 60℃, the ratio of material to liquid is 1:4 (w / v), the concentration of ethanol aq...

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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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