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Preparation method of polyglycerol lactate

A technology of polyglycerol lactate and polyglycerol, which is applied to the preparation of carboxylic acid esters, the preparation of organic compounds, chemical instruments and methods, etc., can solve the problems of no large-scale production, reduce operating steps, and improve reaction selectivity , reduce the effect of side effects

Inactive Publication Date: 2013-06-12
HENAN ACADEMY OF SCI CHEM RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no large-scale production of polyglycerol lactate at home and abroad.

Method used

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  • Preparation method of polyglycerol lactate
  • Preparation method of polyglycerol lactate
  • Preparation method of polyglycerol lactate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] In the reactor, add 200 g of polyglycerol with a degree of polymerization of 3 to 8, and under nitrogen protection, add solid superacid SO 4 2- / Fe 2 o 3 Catalyst 0.4g, 80g of lactic acid with a mass percentage of 90% and toluene 55g, heated to reflux temperature for esterification reaction; refluxed until no water was separated, evaporated toluene, cooled to room temperature, and added the crude product of polyglyceryl lactate to 200ml Stir and dissolve in acetone, filter to remove the catalyst, the filtrate is separated by vacuum distillation and molecular distillation to obtain polyglycerol lactate, the ester content is 98.2%, the acid value is 0.6 mgKOH / g, and the saponification value is 217 mgKOH / g.

Embodiment 2

[0038] In the reactor, add 200 g of polyglycerol with a degree of polymerization of 3 to 8, and under nitrogen protection, add solid superacid SO 4 2- / TiO 2 0.2g of catalyst, 75g of lactic acid with a mass percentage of 90% and 55g of toluene, heated to reflux temperature for esterification reaction; refluxed until no water was separated, evaporated toluene, added the crude product of polyglyceryl lactate to 200ml of methanol and stirred to dissolve , Remove the catalyst by filtration, the filtrate is separated by vacuum distillation and molecular distillation to obtain polyglycerol lactate, the ester content is 97.6%, the acid value is 0.5 mgKOH / g, and the saponification value is 223 mgKOH / g.

Embodiment 3

[0040] In the reactor, add 200 g of polyglycerol with a degree of polymerization of 3 to 8, and under nitrogen protection, add solid superacid SO 4 2- / ZrO 2 Catalyst 0.3g, 80g of lactic acid with a mass percentage of 90% and cyclohexane 60g, heated to reflux temperature for esterification reaction; The product was added to 250ml of ethanol and stirred to dissolve, and the catalyst was removed by filtration. The filtrate was subjected to vacuum distillation and molecular distillation to obtain polyglycerol lactate. The ester content was 96.8%, the acid value was 0.7 mgKOH / g, and the saponification value was 215 mgKOH / g. .

[0041] Depend on Figure 4 It can be seen that the synthetic polyglycerol lactate composition of the present invention is as follows:

[0042] Mass Spectrometry Molecular Weight Corresponding substance name 311.78 Tripolyglycerol Monolactate 385.8 tetrapolyglycerol monolactate 459.96 Pentaglycerol Monolactate 533.87 ...

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Abstract

The invention discloses a preparation method of polyglycerol lactate, and belongs to the field of organic chemical synthesis. The method comprises the following steps of: adding a catalyst, lactic acid and a water-carrying agent for esterification reaction under the protection of nitrogen by taking polyglycerol with the polymerization degree of 3-8 as a raw material to obtain a polyglycerol lactate crude product; and processing to obtain a polyglycerol lactate product with high ester content. The method disclosed by the invention has the advantages of simple production process, available raw material and high yield and is suitable for industrialized production.

Description

technical field [0001] The invention relates to a preparation method of a novel safe, multifunctional and nutritious food additive polyglyceryl lactate, which belongs to the field of organic chemical synthesis. Background technique [0002] Polyglycerol ester is a new type of emulsifier developed in the past 30 years. It has a wide range of uses, and new uses are constantly being researched and developed. The Food and Agriculture Organization of the United Nations (FAO) and the World Health Organization (WHO) have confirmed that polyglycerides are high-safety food additives. [0003] Polyglyceryl lactate is a kind of polyglycerol ester. It is a new type of surfactant with unique properties, which is safe, multifunctional and nutritious. Its uniqueness is mainly reflected in several aspects: as an emulsifier, it has the characteristics of good taste, acid and alkali resistance, nutrition, high temperature resistance, excellent emulsification performance, and no foam in water...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/08C07C69/68
Inventor 代本才赵永德刘喆
Owner HENAN ACADEMY OF SCI CHEM RES INST CO LTD
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