Treatment method of palmitic acid residues

A treatment method and technology of palmitic acid, applied in organic chemistry and other directions, can solve the problems of unutilized waste residue, waste of raw materials, environmental pollution, etc., and achieve the effects of reducing pollution, improving product yield and reducing cost.

Active Publication Date: 2014-04-23
GUANGDONG GUANGYI TECH IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of waste residues in the production of existing processes not only leads to waste of raw materials, but also causes environmental pollution

Method used

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  • Treatment method of palmitic acid residues

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The treatment method of palmitic acid residue is firstly put the palmitic acid residue into the first reaction kettle, add ethyl acetate according to the mass ratio of palmitic acid residue:ethyl acetate at 1:10, and fully stir and mix to obtain the mixed slurry I. Then, the obtained mixed slurry I is centrifuged, and the obtained filter cake is air-dried to obtain the material II, and the obtained filtrate is distilled and returned to the first reaction kettle; the material II and ascorbic acid are put into the Fully react in the second reaction tank for 24 hours to obtain the reaction material III, and the reaction temperature is 25°C. Next, mix the reaction material III with ice at a mass ratio of 1:1.35, ice out, and precipitate VC palmitate, then add methyl isobutyl ketone and toluene for stripping for 35 minutes (the temperature is 60 °C ± 2, Stirring speed is 35 rev / min), until the material is completely dissolved, let it stand still, remove the acid liquid, crys...

Embodiment 2

[0030] The treatment method of the palmitic acid residue is firstly put the palmitic acid residue into the first reaction kettle, add ethyl acetate according to the mass ratio of palmitic acid residue:ethyl acetate as 1:7, and fully stir and mix to obtain the mixed slurry I. Then, the obtained mixed slurry I is centrifuged, and the obtained filter cake is air-dried to obtain the material II, and the obtained filtrate is distilled and returned to the first reaction kettle; the material II and ascorbic acid are put into the Fully react in the second reaction tank for 24 hours to obtain the reaction material III, and the reaction temperature is 22°C. Next, mix the reaction material III with ice at a mass ratio of 1:1.3, carry out ice crystallization, and precipitate VC palmitate, then add methyl isobutyl ketone and toluene for stripping for 30 minutes (the temperature is 60°C±2, Stirring speed is 30 rev / min), until the material is completely dissolved, let it stand still, remove ...

Embodiment 3

[0033] The treatment method of the palmitic acid residue is firstly put the palmitic acid residue into the first reaction kettle, add ethyl acetate according to the mass ratio of palmitic acid residue:ethyl acetate as 1:5, and fully stir and mix to obtain the mixed slurry I. Then, the obtained mixed slurry I is centrifuged, and the obtained filter cake is air-dried to obtain the material II, and the obtained filtrate is distilled and returned to the first reaction kettle; the material II and ascorbic acid are put into the Fully react in the second reaction tank for 24 hours to obtain the reaction material III, and the reaction temperature is 20°C. Next, mix the reaction material III with ice at a mass ratio of 1:1.25, carry out ice crystallization, and precipitate VC palmitate, then add methyl isobutyl ketone and toluene to dissolve and extract for 25 minutes (the temperature is 60 ° C ± 2, Stirring speed is 25 rev / min), until the substance is completely dissolved, let it stan...

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Abstract

The invention relates to the technical field of industry engineering, and particularly relates to a treatment method of palmitic acid residues generated in the technological process of ascorbyl palmitate production. The treatment method comprises the following steps: firstly using a solvent for moistening and washing the palmitic acid residues so as remove impurities in the palmitic acid residues, then sequentially carrying out working procedures such as centrifuging, airing, putting ascorbic acids for reaction, purifying, crystallizing and drying, and finally converting the palmitic acid residues to the ascorbyl palmitate, wherein solvent filtrate obtained in the centrifuging working procedure returns to the moistening and washing impurity removal working procedure. The treatment method has the advantages that waste residues generated in a traditional preparation process of the ascorbyl palmitate are treated and prevented from polluting environments on the one hand, useful materials in the waste residues are utilized on the other hand, so that waste is turned into wealth, the yield of products in the ascorbyl palmitate production is increased by above 10%, and the cost is reduced by 10%-20%.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a treatment method for palmitic acid residue generated in the production process of ascorbyl palmitate. Background technique [0002] Ascorbyl palmitate (also known as VC palmitate) is formed by the esterification of palmitic acid and L-ascorbic acid and other natural components, and its molecular formula is C 22 h 38 o 7 , is a high-efficiency oxygen scavenger and synergist, and has been evaluated by the World Health Organization (WHO) Food Additives Committee as a nutritional, non-toxic, efficient and safe food additive. [0003] At present, the preparation methods of food antioxidant ascorbyl palmitate mainly include chemical methods and biological methods, and the chemical methods are mainly prepared from raw materials ascorbic acid and palmitic acid through a series of esterification reactions and purification. In order to achieve the best product yield in the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D307/62
CPCC07D307/62
Inventor 林富强黄凯陈永恒
Owner GUANGDONG GUANGYI TECH IND
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