A method for preparing walnut oil by demulsifying walnut oil body by water method

A walnut oil and demulsification technology, which is applied in the field of vegetable oil and protein processing, can solve the problems of limited application, increased production cost, expensive equipment, etc., and achieve the effect of environmental protection, high efficiency and simple process in the preparation process

Active Publication Date: 2019-08-30
南京爱美倍健生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Supercritical extraction can protect the quality of oil to a great extent, and the extraction rate is high, but the equipment is extremely expensive, which limits its application
Aqueous enzymatic method is a new type of oil extraction process, which has a high oil extraction rate and high oil safety, but the addition of enzyme preparations greatly increases the production cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Preparation of walnut oil I: add 7 times the mass of water to walnut kernels, grind for 2 minutes, filter to obtain walnut pulp and walnut residue; centrifuge walnut pulp at 3000rpm to obtain light phase I walnut oil body, intermediate phase I and heavy phase I ; Collect the light phase I, adjust the pH to 6.0 with hydrochloric acid, stir and incubate at 200 rpm at 50°C for 5 hours, and centrifuge at 4000 rpm to obtain free walnut oil I; the yield can exceed 93%;

[0025] (2) Preparation of walnut protein: adjust the pH of the intermediate phase I to 4.5 with hydrochloric acid, centrifuge at 3000rpm to obtain a precipitate, neutralize pH7.0 with sodium hydroxide, and spray dry to obtain walnut protein I; the heavy phase I is dispersed in 4 times water , use sodium hydroxide to adjust the pH to 8.0, centrifuge at 4000rpm to obtain light phase II, intermediate phase II and heavy phase II; after mixing intermediate phase II and heavy phase II, use sodium hydroxide to ne...

Embodiment 2

[0029] (1) Preparation of walnut oil I: add 5 times the mass of water to walnut kernels, grind for 2 minutes, filter to obtain walnut pulp and walnut residue; add water to walnut residue, walnut residue: water ratio 1:2, repeat grinding 2 times to obtain walnut pulp; mix all walnut pulp and centrifuge at 3000rpm to obtain light phase I (walnut oil body), intermediate phase I and heavy phase I; collect light phase I, adjust pH to 5.0 with hydrochloric acid, 50rpm stirring insulation 3h, 4000rpm is centrifuged to obtain free walnut oil I; Productive rate can exceed 95%;

[0030] (2) Preparation of walnut protein: adjust the pH of the intermediate phase I to 4.5 with hydrochloric acid, centrifuge at 3000 rpm to obtain a precipitate, neutralize the precipitate with sodium hydroxide to pH 7.0, and spray dry to obtain walnut protein I; the heavy phase I is dispersed in 3 times In water, use sodium hydroxide to adjust pH to 7.5, centrifuge at 5000rpm to obtain light phase II, interme...

Embodiment 3

[0034] (1) Preparation of walnut oil I: Dry grind walnut kernels, add 8 times the mass of water, stir and extract for 30 minutes, filter to obtain walnut pulp and walnut residue; centrifuge walnut pulp at 3000rpm to obtain light phase I walnut oil body, intermediate Phase I and heavy phase I; collect the light phase I, adjust the pH to 5.5 with vitamin C, stir and incubate at 100 rpm at 70°C for 3 h, and centrifuge at 4000 rpm to obtain free walnut oil I; the yield can exceed 95%;

[0035] (2) Preparation of walnut protein: adjust the pH of the intermediate phase I to 4.5 with hydrochloric acid, centrifuge at 3000 rpm to obtain a precipitate, neutralize it with sodium hydroxide to pH 7.0, and spray dry to obtain walnut protein I; the heavy phase I is dispersed in 4 times water , using sodium hydroxide to adjust the pH to 8.0, centrifuging at 4000rpm to obtain light phase II, intermediate phase II and heavy phase II; after intermediate phase II and heavy phase II are mixed, neut...

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PUM

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Abstract

The invention discloses a method for preparing walnut oil by performing emulsion breaking on a walnut oil body by a water method, and belongs to the technical field of processing of plant oil and proteins. The walnut oil and walnut proteins are prepared by preparing walnut pulp, the walnut oil body, walnut oil I, walnut protein I, the walnut oil body in a heavy phase and walnut protein II, and combining the prepared materials. According to the method, no thermal treatment is carried out in the process of preparing the walnut pulp (or an extract of a walnut water phase), so that the walnut proteins and other components cannot be affected by thermal treatment; a light phase (the walnut oil body) part obtained by centrifugation can be subjected to efficient emulsion breaking by using the method, so as to obtain clear and fragrant walnut oil; by condition optimization, 98 percent or above of oil, obtained by centrifugation, in the walnut oil body can be released. The method is simple in process, and a centrifugation machine is used as main equipment; no enzyme preparation or organic solvent is used, so that the preparation process is environment-friendly and efficient.

Description

technical field [0001] The invention relates to a method for preparing walnut oil by demulsifying walnut oil body by water method, in particular to a method for separating walnut oil body from walnut kernel by water method, and then demulsifying walnut oil body to extract oil, which belongs to plants Oil and protein processing technology field. Background technique [0002] The oil content in walnut kernel is more than 65%, and the unsaturated fatty acid content in the fatty acid composition is more than 90%, which is a high-end oil with excellent functionality. Walnut oil exists in the form of spherical particles called oil bodies (also known as oil bodies, oil bodies, lipid bodies, oleosomes, and spherosomes) in walnut kernel cells. The surface of the oil body is a layer of protein-phospholipid membrane; Endogenous proteins: mainly include oleosin, and a small amount of caleosin and steroleosin; [0003] At present, the methods of extracting walnut oil mainly include pre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C11B1/04C11B1/00C11B3/16A23L33/185
Inventor 陈业明赵路苹华欲飞孔祥珍张彩猛
Owner 南京爱美倍健生物科技有限公司
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