Purification method of sucrose fatty acid ester

A technology of sucrose fatty acid ester and purification method, applied in the field of purification of sucrose fatty acid ester, can solve the problems of ineffective removal of impurities, difficult removal of impurities, unstable sucrose ester, etc., and achieves short heating time, convenient environmental protection treatment, Good product color

Inactive Publication Date: 2010-07-21
浙江合糖科技有限公司
View PDF2 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the industrial production method of sucrose ester is sucrose ester transesterification method. The synthesis of sucrose ester by transesterification method is divided into solvent method and solvent-free method, but the products produced by these two methods contain sucrose monoester, sucrose diester and sucrose polyester. And impurities such as unreacted sucrose, fatty acid soap, fatty acid, fatty acid methyl ester and/or monoglyceride and/or fatty acid propylene glycol ester, catalyst, a kind of purified sucrose ester described in Chinese patent ZL200510006011.1 and European patent EP0448996 respectively The method is that the crude sucrose ester is dissolved in an organic solvent capable of d

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0018] Example one:

[0019] 1. Solvent-free synthesis of crude sucrose fatty acid ester

[0020] 171 grams of sucrose, 150 grams of methyl stearate, 54 grams of potassium stearate and 22.5 grams of potassium carbonate were heated and stirred for 8 hours at a temperature of 140-145°C and a pressure of 2000 Pa, and then cooled to obtain sucrose fatty acid 372.5 g crude ester

[0021] 2. Pretreatment of crude sucrose fatty acid ester products

[0022] Take 300 g of the above crude sucrose fatty acid ester, add 200 ml of ethyl acetate and 200 ml of water, stir to dissolve it at 50°C; adjust the pH to 3 with a mass concentration of 10% citric acid, stand still, and separate the lower layer Water; add 100 ml of water and wash twice to remove residual sucrose, salt and water-soluble pigments; the upper organic solvent layer is distilled under reduced pressure at 95°C to remove the organic solvent to obtain 176 grams of crude sucrose fatty acid ester. The determined content of crude sucros...

Example Embodiment

[0031] Embodiment two:

[0032] 1. Solvent-free synthesis of crude sucrose fatty acid ester

[0033] Heat and stir 200 grams of sucrose, 150 grams of methyl stearate, 50 grams of potassium stearate and 25 grams of potassium carbonate at a temperature of 140-145°C and a pressure of 2000 Pa for 8 hours, and then cool to obtain a sucrose fatty acid product. 398 grams.

[0034] 2. Pretreatment of the crude sucrose fatty acid ester product: Take 300 g of the crude sucrose fatty acid ester product, add 400 ml methyl ethyl ketone and 200 ml water, stir to dissolve it at 50°C; adjust the pH with 5% hydrochloric acid by mass concentration After it is 4, let stand and separate the lower layer of water; add 200 ml of water and wash twice to remove residual sucrose, salt and water-soluble pigment; distill the upper organic solvent layer at 95°C under reduced pressure to remove the organic solvent to obtain sucrose The crude fatty acid ester is 170 grams. The determined content of the crude suc...

Example Embodiment

[0043] Embodiment three:

[0044] 1. Crude product of sucrose fatty acid ester synthesized with dimethyl sulfoxide as solvent

[0045] Dissolve 250 grams of sucrose in 750 milliliters of dimethyl sulfoxide, and add 75 grams of methyl stearate to it. 4 g of potassium carbonate was added to the mixture, and the reaction was carried out at 85°C for 4.5 hours, while methanol produced during the reaction was distilled off under reduced pressure. At the end of the reaction, 17 g of stearic acid was added immediately, and it was concentrated under reduced pressure at 80° C. and then dried to obtain 345 g of crude sucrose fatty acid ester.

[0046] 2. Pretreatment of the crude sucrose fatty acid ester product: Take 300 grams of the crude sucrose fatty acid ester product, add 3000 ml n-butanol and 200 ml water, stir to dissolve it at 50°C; adjust the pH to 3 with 20% sulfuric acid After that, let it stand to remove the lower layer of water; add 200 ml of water to wash twice to remove the re...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Acid valueaaaaaaaaaa
Acid valueaaaaaaaaaa
Acid valueaaaaaaaaaa
Login to view more

Abstract

The invention relates to a purification method of a mixture containing sucrose fatty acid ester; the mixture containing sucrose fatty acid ester is prepared from a sucrose fatty acid ester crude product which is prepared from the preparation of sucrose fatty acid ester with solvent or without solvent; the sucrose fatty acid ester crude product is pre-treated and prepared, and then is purified to prepare the sucrose fatty acid ester; the purification step is to carry out secondary molecular distillation to the sucrose fatty acid ester crude product; the temperature of primary distillation is 100 to 140DEG C, the distillation pressure is 600 to 800Pa, the temperature of secondary distillation is 100 to 150DEG C and the pressure is 0.01 to 1Pa; light phase and heavy phase of secondary distillation are separated, and the heavy phase prepared is the purified sucrose fatty acid ester product. The purification process of the method of the invention has the advantages of short product heating time, good product color, high vacuum degree, little solvent residue in the product, reasonable production process, wastewater containing sugar and salt produced in the production process, and convenient environmental-friendly treatment.

Description

(1) Technical field [0001] The invention relates to a method for purifying sucrose fatty acid ester, in particular to a method for purifying sucrose fatty acid ester by molecular distillation. (2) Background technology [0002] Sucrose fatty acid ester (sucrose fatty acid ester) is an emulsifier with wide range of HLB (hydrophilic-lipophilic balance), good effect, high safety and wide application range. It is usually used in chemical products and daily chemical products. It is used as an additive in the production and processing of food and medicine. The World Health Organization (WHO), the Food Organization of the United Nations (FAO), the European Community, Japan, China and the United States have all approved sucrose ester as a food additive. [0003] Molecular distillation is a special liquid-liquid separation technology. It is different from traditional distillation which relies on the separation principle of boiling point difference, but relies on the difference in the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C07H13/06C07H1/06
Inventor 姜国平严晓阳朱霄鹏
Owner 浙江合糖科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap