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Method for preparing series of sucrose esters in green solvent

A green solvent and sucrose ester technology, applied in the field of sucrose ester manufacturing, can solve problems such as toxic residues, food safety hazards, and environmental pollution, and achieve the effects of preventing caramelization, excellent antibacterial properties, and high economic value

Active Publication Date: 2021-12-10
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of solvents can greatly improve the reaction efficiency and increase the content of monoester in the product, but these organic solvents are toxic solvents with polarity and high melting point, which easily lead to problems such as toxic residues and environmental pollution
At the same time, the resulting products need to be further refined and purified, otherwise direct application to food may lead to hidden dangers in food safety

Method used

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  • Method for preparing series of sucrose esters in green solvent
  • Method for preparing series of sucrose esters in green solvent
  • Method for preparing series of sucrose esters in green solvent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A kind of method that prepares series sucrose ester in green solvent, carries out as follows:

[0046] Step S1: Put 1Kg of sucrose in a container and add 3.8L of dihydro-levoglucosone solvent, and stir at 60-65°C for 45 minutes;

[0047] Step S2: Add 0.58Kg industrial grade methyl stearate, 0.01Kg potassium carbonate, 5g of ZnTAC to the container 24 , to get the mixture;

[0048] Step S3: Connect the container to a constant temperature circulation pipeline, so that the mixture is circulated and mixed. The pressure in the constant temperature circulation pipeline is 10kPa, and the flow rate is 65mL / min. The mixture is under the action of the constant temperature circulation pipeline. The circulation flows through the constant temperature circulator, the pulse electric field, the condenser and the container, and the mixed material undergoes transesterification reaction in the constant temperature circulation pipeline. The constant temperature circulation pipeline include...

Embodiment 2

[0060] A kind of method that prepares series sucrose ester in green solvent, carries out as follows:

[0061] Step S1: Put 1Kg of sucrose in a container and add 3.5L of dihydro-levoglucosone solvent, and stir at 60-65°C for 45 minutes;

[0062] Step S2: Add 0.87Kg industrial grade methyl stearate, 0.01Kg potassium carbonate, 3g CaO·γ-Fe to the container 2 o 3 , to get the mixture;

[0063]Step S3: Connect the container to a constant temperature circulation pipeline to circulate and mix the mixture. The pressure in the constant temperature circulation pipeline is 8kPa, the flow rate is 58mL / min, and the mixture circulates under the action of the constant temperature circulation pipeline. Flowing through constant temperature circulator, pulse electric field, condenser and described container, mixed material carries out transesterification reaction in described constant temperature circulation pipeline, and described constant temperature circulation pipeline comprises sequentia...

Embodiment 3

[0075] This example is the same as the operation steps in Example 1, but focuses on the feasibility of verifying the recovery of by-products and solvents, the specific differences are as follows:

[0076] (1) The methyl stearate used in step S2 comes from the methanol collected in step S3 of Example 1 carried out several times, and is prepared by sulfuric acid catalyzed esterification with stearic acid; The reclaimed dihydro-L-glucosone solvent of step S4 of embodiment 1; ZnTAC used 24 From the solid catalyst recovered in step S3 of Example 1.

[0077] (2) The organic solvent used in step S5 comes from the ethanol recovered from the organic phase of step S5 in Example 1.

[0078] According to the method for product quality inspection in embodiment 1, the various quality indicators of sucrose ester products 5 and 6 obtained are detected, and the indicators of the series of sucrose ester products 5 and 6 are the same as those of the series of sucrose ester products 1 and 6 obta...

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Abstract

The invention relates to a method for preparing a series of sucrose esters with different monoester contents in a green solvent. The method comprises the following steps: firstly, heating and stirring sucrose and a dihydrolevoglucosenone solvent, adding low alcohol esters of long-chain fatty acid and a catalyst, performing constant-temperature circulating flow mixing to obtain a mixture, and circulating the mixture through a constant-temperature circulator, a pulsed electric field, a condenser and a container, wherein the mixture is subjected to ester-interchange reaction in the constant-temperature circulating flow process, and a condenser is used for removing lower alcohol generated in the reaction process, performing filtering after circulation, performing reduced pressure distillation for the first time to recover dihydrolevoglucosenone, and putting a crude product into a Soxhlet extractor for segmented extraction to obtain a series of sucrose ester products. According to the method, the green solvent, namely the dihydrodextroglucose ketone solvent, is used for replacing traditional organic solvents such as toxic DMF (Dimethyl Formamide) and DMSO (Dimethyl Sulfoxide), so that the production and product safety is greatly improved; and besides, the Soxhlet extraction process realizes efficient and continuous purification of the series of sucrose esters with different monoester contents, and the used solvents can be recovered and recycled, so that the method is green and environment-friendly.

Description

technical field [0001] The invention relates to the field of sucrose ester manufacture, in particular to a method for preparing a series of sucrose esters in a green solvent. Background technique [0002] Sucrose fatty acid esters are often referred to as sucrose esters for short. Their molecules contain both hydrophilic sucrose moieties and lipophilic (hydrophobic) fatty acid chain moieties. Therefore, they are amphoteric molecules and are excellent surfactants. Sucrose ester has the advantages of environmental protection, non-toxic, non-irritating, and biodegradable; and its hydrophilic and lipophilic properties can be adjusted by its fatty acid side chain length and degree of esterification, so sucrose ester has a wide range of hydrophilic Lipophilic Balance (HLB). For nearly fifty years, sucrose esters have been widely used in food, cosmetics, detergents, medicine, agriculture and other fields. Generally speaking, sucrose fatty acid monoester has more ideal properties ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07H13/06C07H1/00C07H1/06A01N43/16A01P1/00A23L2/52A23L2/44A23G3/42A21D2/18A21D15/00A23L29/00A23L29/30A23L3/3562A23L13/40A23B4/20A23B7/154A61K8/60A61Q1/06A61Q5/02A61Q17/00A61Q19/00
CPCC07H13/06C07H1/00C07H1/06A01N43/16A23L2/52A23L2/44A23G3/42A21D2/18A21D15/00A23L29/04A23L29/30A23L3/3562A23L13/42A23B4/20A23B7/154A61K8/60A61Q5/02A61Q19/00A61Q1/06A61Q17/005A23V2002/00A23V2200/10
Inventor 蓝平滕英来马亚茹
Owner JINAN UNIVERSITY
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