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Method for extracting diglyceride from tailings of molecular distillation of glyceride

A technology of molecular distillation and diglyceride, which is applied in the recovery of fatty oil/fatty acid from waste, organic chemistry, recovery of fatty substances, etc., can solve the problems of retention, operability and poor control

Inactive Publication Date: 2007-12-26
MASSON GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Domestic published literature has reported a diglyceride refining technology, which is to obtain purified diglyceride and by-product monoglyceride from a mixture of enzymatic diglycerides through liquid extraction technology; in addition, Enzymatic glycerol hydrolysis to synthesize diglycerides, immobilized lipase catalyzed synthesis of diglycerides, glycerol hydrolysis to produce diglycerides, water vapor purification technology of diglycerides, and enzymatic reaction refining technology have also been reported in the literature, but The disadvantage of this enzymatic method is that fatty acids must be separated, purified, and then subjected to selective enzymatic reactions. It is not feasible to use these methods in actual industrial production.
The disadvantage of the current technology is that it cannot carry out industrialized production, and it is still in the research stage of the laboratory, because the raw materials and processes used are unattainable in industrial production, and the operability and control are poor.
At present, there is no relevant technology for extracting diglycerides from the by-products of molecular distillation

Method used

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  • Method for extracting diglyceride from tailings of molecular distillation of glyceride

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Put 100kg of molecular distillation monoglyceride leftovers into a 200L reactor, heat and melt to 100°C, then filter twice through the connected filter press, connect the vacuum system to make the vacuum reach -0.1Mpa, Heat the material to 110° C., add 1 kg of 30% hydrogen peroxide, and keep stirring at this temperature for 30 minutes. Lower the temperature to 100°C, suck in 1 kg of activated carbon and 1 kg of diatomaceous earth by vacuum and stir for 30 minutes. After the temperature is lowered to 80°C, filter repeatedly until it is too clear and there are no impurities. Then enter the three-stage molecular distillation system and keep The vacuum pressure of the first stage molecular distillation is 40Pa, the temperature is 200°C, the vacuum pressure of the second stage molecular distillation is 35Pa, the temperature is 190°C, the vacuum pressure of the third stage molecular distillation is 1.0Pa, and the temperature is 200°C , re-distill the diglyceride distilled in ...

Embodiment 2

[0033]Put 500 kg of molecular distillation monoglyceride leftovers into a 5000L reactor, heat and melt to 100°C, then filter twice through the connected filter press, connect the vacuum system to make the vacuum reach -0.1Mpa, Heat the material to 105° C., add 10 kg of 30% hydrogen peroxide, and keep stirring at this temperature for 60 minutes. Lower the temperature to 85°C, inhale 20kg of activated carbon and 20kg of diatomaceous earth by vacuum, stir for 60 minutes, lower the temperature to 80°C, and then filter repeatedly until it is too clear and free of impurities, then enter the three-stage molecular distillation system, Keep the vacuum pressure of the first stage molecular distillation at 40Pa and the temperature at 200°C, keep the vacuum pressure of the second stage molecular distillation at 35Pa and the temperature at 190°C, keep the vacuum pressure of the third stage molecular distillation at 0.8Pa and the temperature at 198 ℃, reflux and redistill the diglyceride di...

Embodiment 3

[0035] Put 100 kg of molecular distillation monoglyceride leftovers in a 200L reactor, heat and melt to 100°C, then filter twice through the connected filter press, connect the vacuum system to make the vacuum reach -0.001Mpa, Heat the material to 150° C., add 10 kg of 30% hydrogen peroxide, and keep stirring at this temperature for 10 minutes. Lower the temperature to 100°C, inhale 0.1 kg of activated carbon and 0.1 kg of diatomaceous earth by vacuum and stir for 600 minutes. After the temperature is lowered to 50°C, filter repeatedly until it is too clear and there are no impurities. Enter the three-stage molecular distillation system and keep The vacuum pressure of the first stage molecular distillation is 30Pa, the temperature is 250°C, the vacuum pressure of the second stage molecular distillation is 20Pa, the temperature is 250°C, the vacuum pressure of the third stage molecular distillation is 0.1Pa, and the temperature is 250°C , re-distill the diglyceride distilled in...

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Abstract

This invention discloses a method for extracting diglyceride from trash of monoglyceride production by molecular distillation. The method comprises: adding a certain amount of trash into a reaction kettle, adding reductant and decolorant (0.1-10 wt. % of trash) for reduction and decolorization, filtering, and extracting the filtrate by three-stage molecular distillation to obtain diglyceride. The low molecular reductant is H2O2 or ozone compound. The decolorant is activated carbon or diatomite. The content of the obtained diglyceride is higher than 90%.

Description

technical field [0001] The invention relates to a method for producing diglyceride, in particular to a method for extracting diglyceride from leftovers of molecular distillation monoglyceride. Background technique [0002] Chinese patents (application numbers) ZL200310112327.X, ZL03113862.4, ZL200410015348.4, and ZL200610049242.5 all disclose processes for synthesizing diglycerides at low temperatures using solidified lipase. Chinese patent ZL200410015388.9 and Chinese patent ZL200410015388.9 disclose the production process for the production of diglycerides in which unsaturated fatty acids are the majority. The content of diglycerides produced does not reach more than 90%, and no reducing agent is used for decolorization. The method disclosed in PCTWO999119 uses immobilized enzymes to hydrolyze at 240°C, and the source of fatty acids does not include palm oil. PCTWO2003060139 discloses the use of immobilized partial glyceride lipase to produce fatty acids, so that fatty aci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/58C07C69/30C11B13/00
CPCY02W30/74
Inventor 胡勇刚胡道华
Owner MASSON GROUP