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Method for manufacturing oil from rapeseed by means of cold pressing

The technology of rapeseed and rapeseed oil is applied in the field of cold-pressing oil of rapeseed, which can solve the problems of darkening of rapeseed oil and cake meal, poor quality of edible vegetable oil, easy destruction of nutrients, etc., so as to improve the quality, The effect of improving oil quality, oil yield, and oil extraction efficiency

Pending Publication Date: 2018-12-25
望谟县布依王油脂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the existing high-quality rapeseed processing technology still uses the traditional hot pressing process for processing, such as the pre-pressing-extraction method of oil production process, steaming and frying-pressing method of oil production process, etc., due to the relatively long process of raw rapeseed Steam and stir-fry at high temperature for a long time, and pre-press the crude oil through a screw press at 110-120°C. After degumming, deacidification, de-impurity and dehydration, the crude oil becomes edible fourth-grade finished vegetable oil, and the fourth-grade vegetable oil is then After deacidification, deodorization, decolorization and other refining, it becomes refined oil
These oil production methods are all oil production under high temperature and high moisture conditions, which causes the color of rapeseed oil and cake obtained by hot pressing to deepen and deteriorate in quality, and it is easy to destroy the rich nutrients in this kind of high-quality rapeseed. The quality of edible vegetable oil is still not good, and there is still a lot of room for improvement in the existing technology

Method used

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Examples

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Effect test

Embodiment 1

[0035] This embodiment provides a method for cold oil pressing of rapeseed, the specific process is as follows:

[0036] The first step, rapeseed removal: take the fresh rapeseed produced in the same year, winnow to remove impurities, and expose it to the hot sun for 3 days. In case of cloudy and rainy days, stop the exposure until the total exposure time of rapeseed is 3 days; The sun exposure of two adjacent rapeseeds can be separated by more than 1 day to ensure that the rapeseeds are fully dried; during the suspension of the sun exposure process, the rapeseeds are stored in a dry and ventilated place with an air humidity not exceeding 15%, and after the sun exposure is over, winnow again to remove impurities. The finished rapeseed is stored in a completely dark and dry place for 3 days;

[0037] The second step, rapeseed drying: take the above-mentioned stored rapeseed, put it in a hot air dryer at 50 ℃ and dry until the water content is 10%, take it out and put it in a dr...

Embodiment 2

[0045] This embodiment provides a method for cold oil pressing of rapeseed, the specific process is as follows:

[0046] The first step, rapeseed removal: take the fresh rapeseed produced in the same year, winnow to remove impurities, and expose it to the hot sun for 2 days. The sun exposure of two adjacent rapeseeds can be separated by more than 1 day to ensure that the rapeseeds are fully dried; during the suspension of the sun exposure process, the rapeseeds are stored in a dry and ventilated place with an air humidity not exceeding 15%, and after the sun exposure is over, winnow again to remove impurities. Store the finished rapeseed in a completely dark and dry place for 2 days;

[0047] The second step, rapeseed drying: take the above-mentioned stored rapeseed, put it in a hot air dryer at 63°C and dry it until the water content is 8%, take it out and put it in a dry and ventilated place to cool to room temperature, until the rapeseed is completely cooled Pour it into c...

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Abstract

The invention relates to the technical field of rapeseed processing, in particular to a method for manufacturing oil from rapeseed by means of cold pressing. The method for manufacturing the oil fromthe rapeseed by means of cold pressing includes 5 main oil manufacturing processes of rapeseed cleaning, rapeseed drying, rapeseed cold drying, rapeseed hulling and oil manufacturing and rapeseed oilpurification treatment. The method has the advantages that impurities and abortive rapeseed can be removed by the aid of repeated cleaning procedures, and accordingly the oil manufacturing efficiencycan be effectively improved; the rapeseed is soaked in warm water and then is dried, accordingly, tissues inside the rapeseed can be germinated and activated, and the oil yield of the rapeseed can beeffectively increased; oil is separately manufactured from rapeseed kernels and rapeseed hulls by the aid of rapeseed hulling technologies, impurities in primary rapeseed oil further can be removed bythe aid of freezing and thawing purification treatment, accordingly, the purpose of purifying rapeseed oil can be achieved, the quality of finished rapeseed oil can be improved, and squeezed rapeseedkernel oil and squeezed rapeseed hull oil can be applied to different fields.

Description

technical field [0001] The invention relates to the technical field of rapeseed processing, in particular to a method for cold-pressing rapeseed oil. Background technique [0002] Rapeseed, also known as brassica, is the fruit of rapeseed, a cruciferous crop, with long siliques, many pods, and full grains; herbaceous cruciferous crops, one of the main oil crops and nectar crops in China, its seeds are One of the main varieties of raw materials for dipping oil. The oil content in rapeseed is 37.5% to 46.3%. The oil content varies slightly depending on the type of rapeseed. Rapeseed is cultivated all over China and is divided into two types: winter rapeseed and spring rapeseed. Its planting area accounts for more than 40% of the total oil crop area in China, and its output accounts for more than 30% of China's total oil crop output, ranking first in the world. Rapeseed contains a certain amount of erucic acid, which will affect the quality of rapeseed and rapeseed oil. Ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B1/04C11B1/06C11B3/00C11B3/02
CPCC11B1/04C11B1/06C11B3/001C11B3/02
Inventor 王元银
Owner 望谟县布依王油脂有限公司
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