Method for extracting polyglycerol from glycerol slag

A technology of polyglycerin and glycerin, which is applied in the direction of recovery of fat oil/fatty acid from waste materials, fatty acid esterification, and recovery of fatty substances. The effect of industrial upgrading

Inactive Publication Date: 2008-01-16
MASSON GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since polyglycerol must be synthesized before polyglycerol esters are synthesized, most of the synthesis of polyglycerol is carried out by using glycerol at high temperature and using a strong base as a catalyst. The polyglycerol synthesized in this way has a high content of free glycerol. , the product has the disadvantages of deep color, high viscosity and strong smell

Method used

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  • Method for extracting polyglycerol from glycerol slag

Examples

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Embodiment 1

[0024] Take 100 grams of glycerin residue produced by molecular distillation ester emulsifier, add 200 grams of ethanol, heat to 60 ° C, stir for 25 minutes for the first stage extraction, and then add 3 grams of activated carbon and 3 grams of silicon to the extract diatomaceous earth and keep the temperature of the extract at 60°C, stir for 30 minutes for the first-stage decolorization treatment, and then filter the extract with a filter cloth to remove impurities such as activated carbon and diatomaceous earth that cannot be dissolved in the extract, Abandon the filter residue to obtain the extract, filter the extract after the first-stage extraction and decolorization, then add 100 grams of ethanol to the filtered extract for heating and stirring and second-stage extraction, wherein the heating temperature is 60°C, the stirring time is 30 minutes to obtain the extract, then add 3 grams of activated carbon and 3 grams of diatomaceous earth to the extract and keep the tempera...

Embodiment 2

[0026]Take 1000 grams of glycerin residue produced by molecular distillation ester emulsifier, add 5000 grams of ethanol, heat to 65 ° C, stir for 100 minutes for the first stage extraction, and then add 80 grams of activated carbon and 80 grams of silicon to the extract diatomaceous earth and keep the temperature of the extract at 60°C, stir for 150 minutes for the first-stage decolorization treatment, and then filter the extract with a filter frame to remove impurities such as activated carbon and diatomaceous earth that cannot be dissolved in the extract, Abandon the filter residue to obtain the extract, filter the extract after the first-stage extraction and decolorization, then add 1000 grams of ethanol to the filtered extract for heating and stirring and second-stage extraction, wherein the heating temperature is 60°C, the stirring time is 100 minutes to obtain the extract, then add 80 grams of activated carbon and 80 grams of diatomaceous earth to the extract and keep th...

Embodiment 3

[0028] Take 300 kilograms of glycerin residues produced from molecular distillation ester emulsifiers, add 1500 kilograms of 80% ethanol, heat to 55 ° C, stir for 70 minutes for the first stage extraction, and then add 20 kilograms of activated carbon and 20 Kilogram diatomaceous earth and keep the temperature of the extract at 50°C, stir for 100 minutes for first-stage decolorization, then filter the extract with a filter to remove insoluble substances such as activated carbon and diatomaceous earth in the extract Impurities, discard the filter residue, obtain the extract, filter the extract after the first-stage extraction and decolorization treatment, and then add 750 kg of 80% ethanol to the filtered extract for heating and stirring and second-stage extraction, wherein The heating temperature is 55°C, and the stirring time is 70 minutes to obtain the extract, then add 20 kg of activated carbon and 30 kg of diatomaceous earth to the extract and keep the temperature of the ex...

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Abstract

Disclosed is a method for extracting polyglycerol from glycerol slag, which comprises the following steps: first, a certain quantity of organic solvent is added into the glycerol slag to have a two-stage heated mixing and extraction and decolouring treatment to obtain the head product with the solvent being recovered. Then, impurities like free glycerol and ester compounds in the head product are removed through a two-stage molecular distillation system to obtain the distillation product polyglycerol. Because the glycerol slag is used as the raw material to have two-stage extraction, decolouring treatment and two-stage molecular distillation, the waste glycerol slag produced during the production of glycerol distillation and molecular distillation of ester emulsifiers is used fully as a valuable material with the cost being saved and the income being increased, the industrial upgrading of polyglycerol ester is improved. The invention can ensure fully that the extracted, separated and purified polyglycerol can be used directly to have esterification reaction with fatty acid to produce the polyglycerol ester used for synthesizing food grade and cosmetic grade.

Description

technical field [0001] The invention relates to a method for extracting polyglycerol from glycerol residue, in particular to a method for extracting, separating and purifying polyglycerol from glycerol residue of molecular distillation ester emulsifier. Background technique [0002] Polyglycerol is an important fine chemical product and synthetic intermediate. Among them, polyglycerol esters synthesized from polyglycerols with different degrees of polymerization and different fatty acids have the functions of emulsification, dispersion, anticorrosion, lubrication, and wetting, and are now widely used in food, medicine, daily chemicals, and industrial surfactants. Since polyglycerol must be synthesized before polyglycerol esters are synthesized, most of the synthesis of polyglycerol is carried out by using glycerol at high temperature and using a strong base as a catalyst. The polyglycerol synthesized in this way has a high content of free glycerol. , The product has shortco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/34C11B13/00C11C3/04
CPCY02W30/74
Inventor 胡勇刚杨菁
Owner MASSON GROUP
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