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Removing method of free fatty acid in fully-hydrogenated high erucic acid rapeseed oil

A free fatty acid and rapeseed oil technology, which is applied in the direction of fat oil/fat refining and fat production, can solve the problem of high free fatty acid content and achieve the effect of improving product quality

Active Publication Date: 2014-04-09
SOUTHSEAS OILS & FATS INDAL CHIWAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a method for removing free fatty acids in high erucic acid rapeseed oil, aiming at solving the problem that the content of free fatty acids in the existing high erucic acid rapeseed oil is too high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] After extreme hydrogenation of high erucic acid rapeseed oil, add 3.0% (wt% extremely hydrogenated high erucic acid rapeseed oil) clay to the extremely hydrogenated high erucic acid rapeseed oil, and decolorize at 100 ℃ and vacuum conditions for 40min, After the decolorization is completed, the decolorizer is filtered, and the decolorized extremely hydrogenated high erucic acid rapeseed oil enters the deodorization tower, the deodorization temperature is 260°C, the direct steam is 190kg / h, and the stripping time is 3h, and the refined extremely hydrogenated high erucic acid rapeseed oil is obtained Seed oil with an FFA of 0.02%.

Embodiment 2

[0026] After extreme hydrogenation of extremely hydrogenated canola oil, add 4.0% (wt% extremely hydrogenated canola oil) clay to the extremely hydrogenated canola oil, and decolorize it at 130°C and vacuum 40 minutes, after decolorization is completed, filter the decolorant, and the decolorized extremely hydrogenated high erucic acid rapeseed oil enters the deodorization tower, the deodorization temperature is 250°C, the direct steam is 150kg / h, and the stripping time is 5h, and the refined extremely hydrogenated high erucic acid rapeseed oil is obtained Pickled rapeseed oil with an FFA of 0.03%.

Embodiment 3

[0028] After extreme hydrogenation of extremely hydrogenated canola oil, add 2.0% (wt% extremely hydrogenated canola oil) clay to the extremely hydrogenated canola oil, and decolorize it at 110°C and vacuum 40 minutes, after decolorization is completed, filter the decolorant, and the decolorized extremely hydrogenated high erucic acid rapeseed oil enters the deodorization tower, the deodorization temperature is 263°C, the direct steam is 220kg / h, and the stripping time is 2h, and the refined extremely hydrogenated high erucic acid rapeseed oil is obtained Pickled rapeseed oil with an FFA of 0.02%.

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Abstract

The invention discloses a removing method of free fatty acid in fully-hydrogenated high erucic acid rapeseed oil, wherein the removing method comprises the following steps: (i), adding a discoloring agent into the fully-hydrogenated high erucic acid rapeseed oil, discoloring for 20 minutes-60 minutes under a high-temperature vacuum condition; (ii), after the discoloring is completed, filtering the discoloring agent; and (iii), carrying out deodorization treatment onto grease obtained by filtering, wherein deodorization conditions are as follows: a deodorization temperature of 250 DEG C-270 DEG C, steam-stripping direct steam flow rate of 150 kg / hour-300kg / hour, and deodorization time of 2 hours-5 hours. According to the removing method disclosed by the invention, content of the free fatty acid in the fully-hydrogenated high erucic acid rapeseed oil is lowered to less than 0.03% by controlling the deodorization conditions, i.e., setting the deodorization conditions as follows: the deodorization temperature of 250 DEG C-270 DEG C, the steam-stripping direct steam flow rate of 150 kg / hour-300kg / hour, and the deodorization time of 2 hours-5 hours, so that product quality is improved.

Description

technical field [0001] The invention relates to the field of oil refining, in particular to a method for removing free fatty acids in extremely hydrogenated high erucic acid rapeseed oil. Background technique [0002] At present, researchers have found in the refining process of extremely hydrogenated high erucic acid rapeseed oil (extreme hydrogenation is defined as: hydrogenating the oil to an iodine value <3gI / 100g) that its free fatty acid content (FFA) still cannot meet the requirements (FFA≤ 0.05%), FFA is between 0.07-0.10% after many times of production. Under the traditional product refining process, FFA is difficult to reduce to the internal control standard. The analysis shows that the FFA of high erucic acid rapeseed oil is relatively high after extreme hydrogenation, and the long-term High carbon chain C22:0 content (>40%) free fatty acid has a high boiling point, which makes it difficult to control FFA to ≤0.05%, and too high free fatty acid content will ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B3/02
Inventor 柯小侨龙敬敬李学龙熊跃文
Owner SOUTHSEAS OILS & FATS INDAL CHIWAN
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