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Freeze-thawing demulsification based method for extracting tea oil

A technology of demulsification and camellia oil, applied in the direction of fat oil/fat production, fat production, etc., can solve the problem of low oil extraction rate, and achieve the effect of simple process

Pending Publication Date: 2015-11-11
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the emulsified layer produced during the water extraction process causes the oil to be wrapped by the emulsion, and the final oil extraction rate is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Camellia oleifera seeds are manually shelled, dried and crushed.

[0019] (2) Weigh 200g of tea seed powder, extract with distilled water at a mass ratio of 1:5, beat in a colloid mill for 15 minutes, centrifuge at 4200r / min for 12 minutes, repeat 3 times, and collect the emulsion.

[0020] (3) Beat the remaining water phase and residue with a colloid mill for 8 minutes, let it stand, and centrifuge at 5000r / min for 20 minutes, repeat 4 times, and collect the emulsion.

[0021] (4) Combine the emulsions collected twice.

[0022] (5) Freeze the emulsion at -20°C for 18 hours, take it out and thaw it in warm water at 40°C, centrifuge at 4200r / min to separate the supernatant oil layer, repeat 3 times.

[0023] (6) Combine clean oil, vacuum dry, and the oil extraction rate is 80.56%.

Embodiment 2

[0025] (1) Camellia oleifera seeds are manually shelled, dried and crushed.

[0026] (2) Weigh 600g of tea seed powder, extract with distilled water at a mass ratio of 1:3, beat in a colloid mill for 12 minutes, centrifuge at 5000r / min for 15 minutes, repeat 4 times, and collect the emulsion.

[0027] (3) Beat the remaining water phase and residue again with a colloid mill for 12 minutes, let it stand, and centrifuge at 4200r / min for 15 minutes, repeat 4 times, and collect the emulsion.

[0028] (4) Combine the emulsions collected twice.

[0029] (5) Freeze the emulsion at -80°C for 24 hours, take it out and thaw it in warm water at 45°C, centrifuge at 4200r / min to separate the supernatant oil layer, repeat 4 times.

[0030] (6) Combine clean oil and dry it in vacuum, the oil extraction rate is 82.11%.

Embodiment 3

[0032] (1) Camellia oleifera seeds are manually shelled, dried and crushed.

[0033] (2) Weigh 1000g tea seed powder, extract with distilled water at a solid-liquid mass ratio of 1:8, beat in a colloid mill for 13min, centrifuge at 4500r / min for 20min, repeat 4 times, and collect the emulsion.

[0034] (3) Beat the remaining water phase and residue with a colloid mill for 10 minutes, let it stand, and centrifuge at 4200r / min for 15 minutes, repeat 4 times, and collect the emulsion.

[0035] (4) Combine the emulsions collected twice.

[0036] (5) Freeze the emulsion at -20°C for 20 hours, take it out and thaw it in warm water at 50°C, centrifuge at 5000r / min to separate the supernatant oil layer, repeat 3 times.

[0037] (6) Combine clean oil and dry it in vacuum, the oil extraction rate is 81.86%.

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Abstract

A freeze-thawing demulsification based method for extracting tea oil is as follows: (1) artificially removing shells in tea-oil tree seed, drying and crushing; (2) weighing the tea seed powder obtained in the step (1), adding distilled water according to the mass ratio of solid to liquid being 1: 3-1: 8, beating by a colloid mill for 10-15 min, centrifuging at 3000-10000 r / min for 10-30 min, repeating 3-5 times, and collecting the upper layer emulsion; (3) beating the remaining aqueous phase and the residue from the step (2) by a colloid mill again for 5-10 min, allowing to stand, centrifuging at 3000-10000 r / min for 10-30 min, repeating 3-5 times, and collecting the upper layer emulsion; (4) combining the emulsion collected in step (3) and step (4); (5) freezing the emulsion under conditions of -20 to -80 DEG C for 12-24 h, taking out, thawing in warm water at 40-60 DEG C, centrifuging at 2000-5000 r / min, separating the upper supernatant oil layer, and repeating 3-5 times; and (6) merging the collected clear oil into and drying under vacuum. The emulsion of the present invention has oil content rate of 60-70%; freeze-thawing demulsification process is simple and does not use any chemicals; and the extracted tea oil is economic, efficient, safe and nutritious.

Description

technical field [0001] The invention belongs to the technical field of grain and oil processing. Background technique [0002] At present, the extraction techniques of tea seed oil mainly include traditional pressing method, organic solvent leaching method, Soxhlet extraction method, supercritical extraction method, water substitution method and aqueous enzymatic method, etc. The pressing method and organic solvent leaching method are commonly used in industry. [0003] The water substitution method is a newly developed oil extraction method, which replaces the position of oil in the cells with water to free the oil, and meets the "safe, efficient, and green" oil extraction requirements. However, the pressing method has high residual oil and serious damage to nutrients; the solvent leaching method has safety problems such as solvent residues; the supercritical extraction method has problems such as high equipment investment. Therefore, the water substitution method is a gr...

Claims

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Application Information

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IPC IPC(8): C11B1/04C11B1/10
Inventor 李红艳邓泽元杨建远
Owner NANCHANG UNIV
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