Method and system for low-residue multi-stage stripping of vitamin E by-product fatty acid solvent

A by-product, fatty acid technology, applied in the field of vitamin E preparation, can solve the problems of low purity of vitamin E recovery, serious environmental pollution, difficult reaction control, etc., to achieve high purity and recovery, low environmental pollution, easy to control the reaction Effect

Active Publication Date: 2021-03-16
JIANGSU CONAT BIOLOGICAL PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Domestic production of vitamin E has many unit operations, high residual volume (greater than 5000ppm), high labor intensity, serious environmental pollution, difficult reaction control, low recovery rate and low purity of vitamin E

Method used

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  • Method and system for low-residue multi-stage stripping of vitamin E by-product fatty acid solvent
  • Method and system for low-residue multi-stage stripping of vitamin E by-product fatty acid solvent
  • Method and system for low-residue multi-stage stripping of vitamin E by-product fatty acid solvent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] This embodiment provides one of the implementations of the method for centrifugal separation of 50VE and sterols, which includes:

[0030] Dissolve 1 ton of soybean oil deodorized distillate in 5000 L of acetone-methanol mixed solvent (the volume ratio of acetone to methanol is 1.5:1), and inject the mixed solution into the cooling device 301 of the second heat exchange unit 300 for low-temperature crystallization deal with. During the low-temperature crystallization process, the present invention needs to control the initial temperature in the cooling device 301 to 40°C, then slowly lower the temperature to -5°C within 4 hours, and keep it for 24 hours to obtain a crystallization mixed solution. Then transfer the crystallization mixed solution in the cooling device 301 to the filter unit 700 for filtration, take the filtrate and centrifuge, wash and dry to obtain a deodorized distillate from which sterols have been removed, and centrifuge at 6000rpm for 30min.

[0031...

Embodiment 2

[0066] Dissolve 1 ton of soybean oil deodorized distillate in 6000L of acetone-methanol mixed solvent (the volume ratio of acetone to methanol is 2:1), control the temperature at 35°C, then slowly cool down to -5°C within 5h, and keep 24h, then filter, take the filtrate and centrifuge, wash and dry to obtain the deodorized distillate that removes sterols, and centrifuge at 7000rpm for 35min;

[0067] Distill the deodorized distillate that removes sterols at a distillation temperature of 230°C, a feed temperature of 80°C, and a rotation speed of 120r / min to obtain a distillate and a residual liquid; the distillate is subjected to multi-stage vaporization Extract, and then evaporate the solvent to obtain the vitamin E product.

[0068] The measured content of the vitamin E product in Example 2 is 51.4%, the recovery rate is 82.3%, and the residual volume is 82ppm.

[0069] The "low temperature crystallization" and "filtration" in the above process of this embodiment are realize...

Embodiment 3

[0071] Dissolve 1 ton of corn oil deodorized distillate in 5500L of acetone-methanol mixed solvent (the volume ratio of acetone to methanol is 2:1), control the temperature at 40°C, then slowly cool down to -5°C within 6h, and keep 20h, then filter, take the filtrate and centrifuge, wash and dry to obtain a deodorized distillate that removes sterols, and centrifuge at 6000rpm for 35min;

[0072] The deodorized distillate from which sterols have been removed is distilled at a distillation temperature of 230°C, a feed temperature of 90°C, and a rotation speed of 160r / min to obtain a distillate and a residual liquid respectively; the distillate is subjected to multi-stage vaporization Extract, and then evaporate the solvent to obtain the vitamin E product.

[0073] The measured content of the vitamin E product in Example 3 is 50.3%, the recovery rate is 84.1%, and the residual volume is 83ppm.

[0074] The "low temperature crystallization" and "filtration" in the above process o...

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Abstract

The invention discloses a method and a system for low-residual multi-stage stripping of a vitamin E by-product fatty acid solvent, and the method is as follows: distilling a deodorized distillate fromwhich sterol is removed to respectively obtain a distillate and a residual liquid; performing multi-stage stripping on the distillate, and evaporating a solvent to obtain a vitamin E product. The method has the advantages of extremely low residual capacity, low labor intensity, low environmental pollution, easy control of reaction, and high purity and high recovery rate of the vitamin E.

Description

technical field [0001] The invention belongs to the technical field of vitamin E preparation, and in particular relates to a low-residue multi-stage steam stripping method for fatty acid solvents of vitamin E by-products and a combined system for crystallization and filtration. Background technique [0002] Vegetable oil deodorization distillates are mixtures of fractions obtained during the deodorization of vegetable oils. It mainly contains a large amount of free fatty acids, vitamin E, glycerides and other components. [0003] Vitamin E is a fat-soluble vitamin, and its hydrolysis product is tocopherol, which is one of the most important antioxidants. Soluble in organic solvents such as fat and ethanol, insoluble in water, stable to heat and acid, unstable to alkali, sensitive to oxygen, not sensitive to heat, but the activity of vitamin E is significantly reduced when fried. Tocopherol can promote the secretion of sex hormones, increase the vitality and quantity of spe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D3/14B01D3/38B01D3/32
CPCB01D3/146B01D3/32B01D3/38
Inventor 吴正章方华郭春荣张鹏陈其林
Owner JIANGSU CONAT BIOLOGICAL PROD
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