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A kind of method that magnetic solid base catalyst synthesizes polyglycerol fatty acid ester

A solid base catalyst and fatty acid ester technology, which is applied in the field of polyglycerol esters, can solve the problems of low life, low high temperature resistance, high cost, etc., and achieve the effect of high catalytic activity

Active Publication Date: 2021-08-17
广东省科学院生物与医学工程研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In view of the lack of performance of homogeneous catalysts in terms of equipment corrosion, product separation, and waste liquid and residue discharge, as well as the fatal defects of enzyme catalysts such as high cost, short life, low high temperature resistance and low stability, we are looking for a high activity, stable Catalysts with good performance and easy separation become necessary

Method used

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  • A kind of method that magnetic solid base catalyst synthesizes polyglycerol fatty acid ester

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The preparation method of magnetic solid base catalyst specifically comprises the steps:

[0034] (1) Preparation of magnetic nanoparticles: 40mL kerosene, 40mL fatty alcohol polyoxyethylene-3-ether (AEO3), 20mL n-butanol, 40mL FeSO 4 , Fe(NO 3 ) 3 The mixed liquid aqueous solution and 0.1g NaOH are mixed uniformly to obtain microemulsion a, FeSO 4 with Fe(NO 3 ) 3 The molar ratio of Fe is 1:1, Fe 2+ The molar concentration is 2mmol / L, 40mL kerosene, 40mL alkylphenol polyoxyethylene ether (TX10), 20mL n-butanol, 40mL FeSO 4 , Fe(NO 3 ) 3 The mixed liquid aqueous solution and 0.1g NaOH are mixed uniformly to obtain microemulsion b, FeSO 4 with Fe(NO 3 ) 3 The molar ratio of Fe is 1:1, Fe 2+ The molar concentration is 2mmol / L. Under uniform stirring, microemulsion a was gradually added to microemulsion b until the pH of the mixed emulsion was > 8. The mixed emulsion was transferred to a blue-necked bottle and sealed, then placed in a water bath and aged at 70°...

Embodiment 2

[0040] The preparation method of magnetic solid base catalyst specifically comprises the steps:

[0041] (1) Preparation of magnetic nanoparticles: 40mL kerosene, 20mL fatty alcohol polyoxyethylene-3-ether (AEO3), 20mL n-butanol, 40mL FeSO 4 , Fe(NO 3 ) 3 The mixed liquid aqueous solution and 0.1g NaOH are mixed uniformly to obtain microemulsion a, FeSO 4 with Fe(NO 3 ) 3 The molar ratio of Fe is 2:1, Fe 2+ The molar concentration is 2mmol / L, 40mL kerosene, 20mL alkylphenol polyoxyethylene ether (TX10), 20mL n-butanol, 40mL FeSO 4 , Fe(NO 3 ) 3 The mixed liquid aqueous solution and 0.1g NaOH are mixed uniformly to obtain microemulsion b, FeSO 4 with Fe(NO 3 ) 3 The molar ratio of Fe is 2:1, Fe 2+ The molar concentration is 2mmol / L. Under uniform stirring, gradually add microemulsion a into microemulsion b until the pH of the mixed emulsion is >8, transfer the mixed emulsion to a blue-necked bottle, seal it, put it in a water bath, and age it at 70°C for 0.5h. Put ...

Embodiment 3-10

[0047] The preparation step of magnetic solid base catalyst is identical with embodiment 1, and the magnetic saturation intensity and base content of different reaction conditions, gained magnetic solid base catalyst of embodiment 1 are as shown in table 1, and step (4) charge ratio in table 1 Refers to the amount ratio of solid C to γ-aminopropyltriethoxysilane.

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Abstract

The invention provides a method for synthesizing polyglycerol fatty acid ester with a magnetic solid base catalyst. The method comprises the steps of placing polyglycerol, fatty acid and magnetic solid base catalyst in a reaction vessel and stirring, raising the temperature to 120-160°C under an inert atmosphere, keeping the temperature, and then directly raising the temperature to 180-220°C, and reacting 2 After ‑4h, stop heating, keep stirring in an inert atmosphere protection, and when the temperature drops below 160°C, use a magnet to recover the magnetic solid alkali catalyst, and naturally cool the product to obtain polyglycerol fatty acid ester. In the present invention, the polyglycerol fatty acid ester is synthesized with a hydrophobic mesoporous magnetic solid base catalyst, the magnetic solid base catalyst is convenient for separation from a high-viscosity reaction system, and the yield of the polyglycerol fatty acid ester is as high as 89%.

Description

Technical field: [0001] The invention belongs to the technical field of polyglycerol esters, in particular to a method for synthesizing polyglycerol fatty acid esters with a magnetic solid base catalyst. Background technique: [0002] Polyglyceryl fatty acid ester is a new type of high-efficiency and high-performance polyhydroxyl ester non-ionic surfactant, which can be used as emulsifier, stabilizer and structure modifier of food additives. [0003] At present, homogeneous catalysts, enzyme catalysts and solid catalysts can be used in the process of preparing polyglycerol fatty acid esters. Commonly used homogeneous catalysts are strong acid (sulfuric acid) and strong base (NaOH, etc.). In view of the lack of performance of homogeneous catalysts in terms of equipment corrosion, product separation, and waste liquid and residue discharge, as well as the fatal defects of enzyme catalysts such as high cost, short life, low high temperature resistance and low stability, we are ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C69/33C07C69/58C07C67/08B01J31/02B01J23/745
CPCC07C67/08B01J23/002B01J23/745B01J31/0274B01J35/23B01J35/33B01J35/396C07C69/58C07C69/33
Inventor 陈骏佳黄俊生胡双岚孟飞黄冬婷
Owner 广东省科学院生物与医学工程研究所