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Low-temperature cold-pressing process for crude maize oil

A crude oil, low temperature technology, applied in the direction of oil/fat production, fat production, etc., can solve the problems that have not yet been reported, and achieve the effects of reducing production costs, improving utilization, and preserving nutritional value.

Inactive Publication Date: 2012-10-31
SHANDONG SANXING CORN IND SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the technology of extracting corn oil by cold pressing has not been reported yet.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Selection of corn germs: Select corn germs with full grains, no mildew, 9%-13% corn germ moisture, and 35%-50% oil content, and use a vibrating screen to remove impurities in the corn germs. The sorter removes light impurities and dust in the corn germ to obtain high-quality corn germ;

[0026] (2) Softening of corn germ: The selected corn germ is crushed by a gear crusher, and the crushed particle size is 8 petals. The crushed oil is softened by a drum softening pot. When softening, the water content is 11%, and the softening temperature is 70°C. The softening time is 30 minutes;

[0027] (3) Flaking: use a roller flaking machine to roll the softened corn germ into 0.3mm flakes;

[0028] (4) Drying: The corn germ after flaking is dried with hot air in drying equipment at a drying temperature of 35°C to reduce the moisture content of the corn germ to 2%;

[0029] (5) Pressing: enter the oil press to extract oil, the temperature of the corn germ fed is 30°C, the sc...

Embodiment 2

[0033] (1) The selection of corn germ is the same as in Example 1;

[0034] (2) Softening of corn germ: the selected corn germ is crushed by a gear crusher, and the crushed grains

[0035] The temperature is 6 petals, and the crushed oil is softened by a drum softening pot. When softening, the water content is 10%, the softening temperature is 60°C, and the softening time is 20 minutes;

[0036] (3) Flaking: use a roller flaking machine to roll the softened corn germ into 0.3mm flakes;

[0037] (4) Drying: The corn germ after flaking is dried with hot air in drying equipment at a temperature of 30°C to reduce the moisture content of the corn germ to 3%;

[0038] (5) Pressing: enter the oil press to extract oil, the temperature of the corn germ fed is 35°C, the screw speed is 40 rpm, and the oil output temperature is 70°C;

[0039] (6) Filtration: The squeezed oil is obtained by sedimentation and filtration.

[0040] The oil yield of this embodiment is 38.5%.

Embodiment 3

[0042] (1) The selection of corn germ is the same as in Example 1;

[0043] (2) Softening of corn germ: The selected corn germ is crushed by a gear crusher, and the crushed particle size is 4 petals. The crushed oil is softened by a drum softening pot. When softening, the water content is 12%, and the softening temperature is 80°C. The softening time is 15 minutes;

[0044] (3) Flaking: use a roller flaking machine to roll the softened corn germ into 0.4mm flakes;

[0045] (4) Drying: The corn germ after flaking is dried with hot air in drying equipment at a drying temperature of 40°C to reduce the moisture content of the corn germ to 4%;

[0046] (5) Pressing: enter the oil press to extract oil, the temperature of the corn germ fed is 10°C, the screw speed is 20 rpm, and the oil output temperature is 80°C;

[0047] (6) Filtration: The squeezed oil is obtained by sedimentation and filtration.

[0048] The oil yield of this embodiment is 35.0%.

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Abstract

The invention belongs to the technical field of crude maize oil preparation methods, and provides a low-temperature cold-pressing production process for the crude maize oil. The process comprises the steps of the selection, the softening, the flaking, the stoving, the squeezing and the filtering of maize germs. According to the low-temperature cold-pressing process for the crude maize oil, high-temperature processing is not included in the oil pressing process, damages of the high temperature to active constituents of the crude maize oil in the production process are prevented effectively, nutrition values of the crude maize oil are saved furthest, the crude maize oil flavor is saved, the oil extraction rate is high, the production process is environment-friendly and pollution-free, the process is simple, and the production cost is low.

Description

technical field [0001] The invention belongs to the technical field of corn crude oil preparation methods, and in particular relates to a production process for extracting corn crude oil by low-temperature cold pressing. Background technique [0002] Corn oil is an oil extracted from corn germ. The content of unsaturated fatty acids in corn crude oil is as high as 80% to 85%, of which linoleic acid accounts for 55%, oleic acid accounts for 30%, and also contains vitamin E, phytosterols, lecithin, coenzymes, β-carotene and other nutrients. Unsaturated fatty acids have poor heat resistance, and are prone to oxidative polymerization, hydrolysis, cracking, cyclization and other reactions when heated, and produce harmful substances to the human body. In addition, vitamin E and β-carotene are unstable at high temperature and are easy to oxidize and deteriorate. [0003] Traditional oil-making processes mainly include pressing and pre-pressing leaching, while non-traditional proc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B1/06C11B1/04
Inventor 王明星王月华王萍李珊珊
Owner SHANDONG SANXING CORN IND SCI CO LTD
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