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Water process of producing edible rape seed protein and oil

A rapeseed protein and water preparation technology is applied to the protein composition of vegetable seeds, production of fat, fat oil/fat production, etc. low cost effect

Inactive Publication Date: 2002-10-16
SOUTHWEST UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The current rapeseed processing methods are as follows: the first one is to extract the oil after heating, steaming and frying. This method will cause protein denaturation and blackening of the color, which will reduce the reuse value of the dry cake; the second is After mechanical pre-pressing, the oil is extracted with a solvent. The initial equipment investment of this method is large, and the use of flammable and explosive solvents has the risk of fire and explosion, which leads to high management costs; the third method is through After mechanical pre-pressing, the dry cake with an oil content of about 10% is obtained, and then the protein and oil in the dry cake are extracted with an aqueous solution. This is a "Ninth Five-Year Plan" research project completed by the inventor in the early stage; the fourth method is After the rapeseed is crushed mechanically, the protein is extracted with acid, and then the oil is extracted with aqueous solution. This is a personal invention patent obtained by the inventor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Weigh 100 kilograms of rapeseed and put it into 500 kilograms of 5 / 10000 sodium sulfite aqueous solution, use a pulp and residue separator equipped with a 50-mesh screen to refine the pulp to remove coarse fibers, repeat the above steps twice, and use a centrifuge to remove the pulp. Residue, the obtained slurry is adjusted to pH 5.5, and the sediment part mainly containing oil and the supernatant containing protein and other water-soluble substances are separated by a suspension separator, and the sediment is subjected to conventional dehydration to make its water content reach 30%. milk, add 100°C hot water with 1 times the weight of the precipitate, use a suspension separator to separate the protein solution from the oil, and use an ultrafilter with a molecular weight cut-off of 5000 to concentrate the protein in the above supernatant and the protein solution obtained later to make After the concentration reaches 2%, the pH is adjusted to 4, the protein precipitate is...

Embodiment 2

[0014] Weigh 200 kilograms of rapeseed and put it into 400 kilograms of 1 / 1000 sodium sulfite aqueous solution, use a slurry separator equipped with a 120-mesh screen to refine the pulp to remove the crude fiber, repeat the above steps 3 times, and use a centrifuge to remove the pulp. Residue, the resulting slurry is adjusted to a pH of 2, and a centrifuge is used to separate the precipitate mainly containing oil and the supernatant containing protein and other water-soluble substances, and the precipitate is vacuum dehydrated to make the water content reach 50% to break the emulsion. Add 80°C hot water five times the weight of the precipitate, and use a cone-shaped static separator to heat for 5 hours to separate the protein solution from the oil, and use ultrafiltration with a molecular weight cut-off of 50,000 to concentrate the protein in the above supernatant and the protein solution obtained later. After the concentration reaches 5%, the pH is adjusted to 11, the protein ...

Embodiment 3

[0016] Weigh 200 kg of rapeseed and put it into 3,000 kg of 5 / 1,000,000 sodium sulfite aqueous solution, use a pulp and residue separator equipped with a 200-mesh screen to remove coarse fibers, repeat the above steps 3 times, and use fine filtration to remove the pulp. Then adjust the pH of the obtained slurry to 11, use a filter to separate the precipitate mainly containing oil and the supernatant containing protein and other water-soluble substances, and vacuum dehydrate the precipitate to make its water content reach 10%. Milk, add 60 ℃ hot water 10 times the weight of the precipitate, use a conical static separator with a heating device to heat for 1 hour to separate the protein solution from the oil, use an ultrafilter with a molecular weight cut-off of 100,000 to concentrate the above supernatant and obtain After the concentration of the protein in the protein solution reaches 1%, the pH is adjusted to 6, the protein precipitate is collected by centrifugation or filtrati...

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Abstract

The present invention is water process of producing edible rape seed protein and oil. Edible rape seed protein and oil are produced through mixing water solution of sodium sulfite with rape seed, grinding in milk-cinder separating machine to eliminate coarse fiber, regulating pH value, depositing oil and partial protein, dewatering to release oil in deposit, adding hot water to separate protein and oil, ultrafiltering and concentration. The present invention has the advantages of low cost, high protein and oil extracting rate and elimination of adverse nutritious factor, and the protein and oil produced reach food standard.

Description

technical field [0001] The invention relates to the field of agricultural and sideline product processing, in particular to a method for producing edible rapeseed protein and oil by water preparation. Background technique [0002] Rapeseed contains relatively unfavorable nutritional factors, including 1.2-2.5% phytic acid, 3-7% glucosinolates (low glucosinolate varieties are about 3.5‰), 0.8-1.6% phenolic compounds, about 2.5% cottonseed Sugar and stachyose, if they are not removed, will hinder the growth and development of animals even if they are used as feed, but if eaten within a safe range, they will have a certain health effect, so it is very necessary to effectively separate them through processing of. [0003] The current rapeseed processing methods are as follows: the first one is to extract the oil after heating, steaming and frying. This method will cause protein denaturation and blackening of the color, which will reduce the reuse value of the dry cake; the seco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23J1/14C11B1/00C11B1/14
Inventor 吴文标
Owner SOUTHWEST UNIVERSITY
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