Method for preparing high-purity food standard product diethyl sebacate
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A technology of diethyl sebacate and standard products, which is applied in the field of preparation of high-purity food standard product diethyl sebacate, can solve problems such as hazards, and achieve the effect of simple process and strong operability
Inactive Publication Date: 2017-01-11
TIANJIN GUANGFU TECH DEV
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Not only is it brought to the human body by packaged food, but it is also dir
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Embodiment 1
[0021] A preparation method of high-purity food standard diethyl sebacate, the steps are as follows:
[0022] (1) The raw material is analyzed by gas chromatography, and the diethyl sebacate content is 98% (GC), and the impurities are mainly sebacic acid and sebacic acid monoester;
[0023] (2) Take 500ml of raw material diethyl sebacate, add 200ml of saturated sodium chloride solution, stir for 20min, and place to separate the water phase;
[0024] (3) Add 250ml of saturated potassium carbonate solution to the organic phase, heat to 45°C and stir for 25 minutes, then heat to 55°C, stir for 25 minutes, stop stirring, let stand to separate the water phase;
[0025] (4) Add 500ml of water to the organic phase, extract and shake for 10 minutes, let stand to separate the water phase;
[0026] (5) Add 500ml of water to the organic phase, extract and shake for 5 minutes, let stand to separate the water phase;
[0027] (6) Add 30 g of desiccant anhydrous potassium carbonate to the ...
Embodiment 2
[0031] A preparation method of high-purity food standard diethyl sebacate, the steps are as follows:
[0032] ⑴The raw materials are the same as the implementation case 1;
[0033] (2) Take 1000ml of raw material diethyl sebacate, add 400ml of saturated sodium chloride solution, stir for 30min, let stand to separate the water phase;
[0034] (3) Add 500ml of saturated potassium carbonate solution to the organic phase, heat to 50°C and stir for 30 minutes, then heat to 60°C, stir for 30 minutes, let stand to separate the water phase;
[0035] (4) Add 1000ml of water to the organic phase, extract and shake for 15 minutes, let stand to separate the water phase;
[0036] (5) Add 1000ml of water to the organic phase, extract and shake for 10 minutes, let stand to separate the water phase;
[0037] (6) Add 65 g of desiccant anhydrous sodium carbonate to the organic phase, shake it, and place it overnight;
[0038] (7) Remove the desiccant, distill under reduced pressure, collect ...
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Abstract
The invention relates to a method for preparing a high-purity food standard product diethyl sebacate. The method comprises the following steps: (1) selecting a raw material diethyl sebacate of which the purity content is not smaller than 98%; (2) adding the raw material diethyl sebacate into a saturated sodium chloride solution, performing stirring for 20-30 minutes, and allowing the stirred material to stand so as to separate a water phase; (3) adding a saturated potassium carbonate solution into the organic phase, performing heating to 40-50 DEG C, performing stirring for 25-30 minutes, performing heating to 50-60 DEG C, performing stirring for 25-30 minutes, and allowing the stirred material to stand so as to separate a water phase; and (4) performing water washing and drying, and performing reduced pressure distillation, thereby obtaining a standard product of which the content is 99.8% (GC), wherein the content of 99% (GC) is analytically pure. The method for preparing the high-purity food standard product diethyl sebacate, which is provided by the invention, is simple in process and good in operability, industrial production of companies can be met, self-operation of a laboratory can be met, the profit can be maximized, and the standard product does not need to be purchased with high price from the market.
Description
technical field [0001] The invention belongs to the technical field of organic chemical industry, relates to the further purification of esters, and specifically provides a preparation method of diethyl sebacate, a high-purity food standard product. Background technique [0002] Diethyl sebacate, colorless to light yellow liquid, with the aroma of wine, fruit and melon GB2760-2007 stipulates that it is a food flavor temporarily allowed, mainly used for the preparation of berry flavors, grape, pear and other flavors and fruit flavors Fragrance solvent. [0003] Diethyl sebacate is also commonly used anti-shrinkage agent, also known as plasticizer. The plasticizer scandal in Taiwan has gradually become an international food safety incident. When people mention plasticizers, they often think of them as phthalates. They don't know that aliphatic dibasic acid esters are also plasticizers that endanger people's health. It is not only brought to the human body by packaged food, b...
Claims
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