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Method for continuously removing dioxin from natural vitamin E

A technology of natural vitamins and dioxins, applied in the direction of organic chemistry, etc., can solve the problem of no solution for dioxins, and achieve the effect of low operating cost and simple process

Active Publication Date: 2013-08-14
ZHONGGU TIANKE TIANJIN BIOENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are no relevant reports and researches on solutions to dioxins in oils

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A method for continuously removing dioxins in natural vitamin E, comprising the steps of: dissolving 100mL natural vitamin E in 400mL methanol, heating to 60°C under nitrogen protection, after mixing uniformly, 5mL under nitrogen protection The speed of / s is continuously passed into the fixed bed of granular activated carbon from the top, the solution stays for 2 hours, the effluent is collected, filtered through a precision filter, the filtrate is concentrated by vacuum distillation, and refined by molecular distillation. The content of dioxin (PCDD+PCDF+PCB) in the molecularly distilled product is 0.82ppt, of which PCDD is 0.23ppt, PCDF is 0.27ppt, and PCB is 0.32ppt. All indicators meet the EU quality standards.

Embodiment 2

[0021] A method for continuously removing dioxins in natural vitamin E, comprising the steps of: dissolving 100mL natural vitamin E in 200mL dehydrated alcohol, heating to 40°C under nitrogen protection, after mixing uniformly, under nitrogen protection Continuously pass into the fixed bed with powdered activated carbon from the top at a speed of 5mL / s. The solution stays for 0.5 hours, collects the effluent, and filters through a precision filter. The filtrate is concentrated by vacuum distillation and refined by molecular distillation. The content of dioxin (PCDD+pCDF+pCB) in the molecularly distilled product is 0.76ppt, of which PCDD is 0.2lppt, PCDF is 0.26ppt, and PCB is 0.2gppt. All indicators meet the EU quality standards.

Embodiment 3

[0023] A method for continuously removing dioxins in natural vitamin E, comprising the steps of: dissolving 100mL natural vitamin E in 100mL isopropanol and 200mL ethyl acetate, heating to 50°C under nitrogen protection, after mixing uniformly, Under the protection of nitrogen, the speed of 5mL / s is continuously passed from the top into the fixed bed of activated clay, the solution stays for 1 hour, the effluent is collected, filtered through a precision filter, the filtrate is concentrated by vacuum distillation, and refined by molecular distillation. Can. The content of dioxin (PCDD+PCDF+PCB) in the molecularly distilled product is 0.93ppt, of which PCDD is 0.28ppt, PCDF is 0.31ppt, and PCB is 0.34ppt. All indicators meet the EU quality standards.

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Abstract

The invention discloses a method for continuously removing dioxin from natural vitamin E. The method comprises the following steps of: dissolving the natural vitamin E in a solvent of which the volume is 2-6 times that of the natural vitamin E; heating to 40-70 DEG C under the protection of nitrogen; uniformly mixing, and then continuously introducing the mixture into a fixed bed in which a filler is filled from the top end of the fixed bed; collecting effluent liquid after the solution stays for 0.5-5 hours; filtering; distilling and concentrating the filtrate; and refining through molecular distillation. The quality of a vitamin E product treated by the method can reach a limit standard to the dioxin by the European Union, the technological process is simple, and the running cost is low, so that the method is a relatively reliable treatment method and is suitable for industrial bulk production.

Description

technical field [0001] The invention relates to a method for continuously removing dioxins in natural vitamin E. Background technique [0002] Dioxin (DioXin) is actually an abbreviation of Dioxin (DioXins), which refers not to a single substance, but two categories that contain many congeners or isomers with similar structures and properties Organic substances, the full names are polychlorinated dibenzodioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs), in addition, some compounds in polychlorinated biphenyls (PCBs) have also been found to have dioxin-like Toxicity, so called dioxin-like compounds. Dioxins are very stable in nature, difficult to degrade and highly enriched. They can be enriched in the food chain through air, water, soil, plants and lipid transfer, and then accumulate in the fat tissue of animals and humans. Hazard to livestock and human health. As a nutrition enhancer, vitamin E is more and more accepted and understood by people. In developed coun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D311/72
Inventor 周学晋曹玉平蒋一鸣陈学兵李鹏安然王静
Owner ZHONGGU TIANKE TIANJIN BIOENG
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