Method for extracting natural vitamin E through two-step reextraction method

A natural vitamin and extraction technology, which is applied in the field of two-step back extraction to extract natural vitamin E, can solve the problems of large amount of organic solvent, difficult separation, high content of esters, etc., and achieve simple operation, high extraction efficiency, and reduced dosage Effect

Active Publication Date: 2016-03-23
EAST CHINA UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the subsequent separation difficulties in the prior art of using ionic liquids to purify natural vitamin E from deodorized distillates, large amount of organic solvents, high content of esters, and low product purity. A method for extracting natural vitamin E using two-step stripping method was proposed

Method used

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  • Method for extracting natural vitamin E through two-step reextraction method
  • Method for extracting natural vitamin E through two-step reextraction method
  • Method for extracting natural vitamin E through two-step reextraction method

Examples

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Effect test

Embodiment 1

[0033] Contain 86.25% of 1-pentyl-3 methylimidazole acetate [C 5 MIm]Ac ionic liquid, 4.81% α-tocopherol and 8.94% methyl linoleate were deodorized distillate model oil extracts for a two-step stripping operation. n-pentane was used as the organic solvent in the stripping process. In the first step back extraction process, the mass ratio of stripping agent (organic solvent) and extraction phase is 10%, after 3 back extractions and adopting decantation method to separate, the raffinate phase is carried out the second step back extraction, wherein The mass ratio of n-pentane: water: raffinate phase is 0.1:0.3:1, the organic solvent phase is obtained by decantation, and the product of vitamin E is obtained by distillation under reduced pressure at 10KPa and 40°C, and the recovery rate is 97.3% , the concentration is 94.5%, and the concentration of methyl linoleate is 5.5%. The extractant ILs in the aqueous phase is also recovered by vacuum distillation, the operating pressure i...

Embodiment 2

[0035] Contain 81.42% of 1-hexyl-3 methylimidazole acetate [C 6 MIm]Ac ionic liquid, 8.30% α-tocopherol and 10.28% methyl linoleate deodorized distillate model oil extract was subjected to two-step stripping operation. Using n-hexane as the organic solvent in the stripping process. In the first step back extraction process, the mass ratio of back extraction agent (organic solvent) and extraction phase is 20%, after 3 times of back extraction and separation by decantation, the raffinate phase is carried out the second step back extraction, wherein n-Hexane: water: the mass ratio of the raffinate phase is 0.2:0.6:1, the organic solvent phase is obtained by decantation, at 1KPa, under reduced pressure distillation at 40°C, the product of vitamin E is obtained, and the recovery rate is 98.7%. The concentration is 99.2%, and the methyl linoleate concentration is 0.8%. The extractant ILs in the aqueous phase is also recovered by vacuum distillation, the operating pressure is 1KPa,...

Embodiment 3

[0037] Contain 80.65% of 1-heptyl-3 methylimidazole acetate [C 7 MIm]Ac ionic liquid, 4.28% α-tocopherol and 15.07% methyl linoleate deodorized distillate model oil extract was subjected to two-step stripping operation. N-heptane was used as the organic solvent in the stripping process. In the first step back extraction process, the mass ratio of back extraction agent (organic solvent) and extraction phase is 40%, after 2 times of back extraction and separation by decantation, the raffinate phase is carried out the second step back extraction, wherein The mass ratio of n-heptane: water: raffinate phase is 0.4:0.8:1, the organic solvent phase is obtained by decantation, and the product of vitamin E is obtained by distillation under reduced pressure at 1KPa and 70°C, and the recovery rate is 97.5% , the concentration is 98.4%, and the concentration of methyl linoleate is 1.6%. The extractant ILs in the aqueous phase is also recovered by vacuum distillation, the operating press...

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Abstract

The invention discloses a method for extracting natural vitamin E through a two-step reextraction method. The method comprises the following steps that an extract phase of deodorization distillate extracted through ionic liquid is subjected to two-step method reextraction; an extraction agent of reextraction in the first step is an organic solvent, and the use amount of the organic solvent accounts for 10% to 100% of the mass of the extract phase; an extraction agent of reextraction in the second step is an organic solvent and water, and the mass ratio of the organic solvent to the water is (0.1-0.6):(0.3-1.2); the organic solvent is saturated alkane. The method for extracting natural vitamin E has high extracting efficiency, the use amount of the solvent is greatly reduced, the purity of obtained natural vitamin E reaches 99.2% to the maximum degree, meanwhile, the recovery rate of natural vitamin E is 97.5%, and the concentration of methyl linoleate is 0.8%. The method is easy to operate, the related solvent can be recycled, and industrial production is facilitated.

Description

technical field [0001] The invention relates to the field of vitamin E extraction, in particular to a method for extracting natural vitamin E by a two-step stripping method. Background technique [0002] Natural Vitamin E (NaturalVitaminE), also known as Tocopherol (Tocopherol), is a commonly used medicine and health care product. It is widely used as an important fat-soluble vitamin antioxidant and is one of the three pillar products of the vitamin series. Since the biological activity and safety of natural vitamin E, especially α-tocopherol, are much higher than those of synthetic vitamin E, the extraction of natural vitamin E has been paid more and more attention by researchers. Natural vitamin E exists in large quantities in plant seeds and animal viscera, but due to its relatively low content, it lacks the value of direct industrial extraction. An important source of existing natural vitamin E is deodorized distillate, a by-product in the refining process of vegetable ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D311/72
CPCC07D311/72
Inventor 漆志文秦磊陈立芳成洪业
Owner EAST CHINA UNIV OF SCI & TECH
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