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A method for removing inorganic salts and organic impurities in sucralose chlorinated liquid

A technology for sucralose and organic impurities, which is applied in the fields of organic chemistry, chemical instruments and methods, sugar derivatives, etc., can solve the problems of large production volume, high processing cost and high water content, so as to reduce the difficulty and cost and reduce the follow-up Handle pressure and avoid the effect of difficult crystallization and filtration

Active Publication Date: 2020-01-31
TECHNO (FUJIAN) FOOD INGREDIENTS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If hazardous waste is treated directly, the treatment cost is very high due to its high water content and large amount of production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] In this embodiment, a method for removing inorganic salts and organic impurities in sucralose chlorinated liquid, the steps are as follows:

[0029] (1) 500mL of sucralose-6-acetate mixed solution is concentrated and distilled under reduced pressure at 90°C by a concentrating evaporator to form a viscous syrup; then add 500mL of ethyl acetate at 30°C and stir to precipitate crystals , to obtain the crystallized mixed material;

[0030] (2) The mixed material after the above-mentioned crystallization is cooled to room temperature and carries out suction filtration, obtains 47.5g black filter cake and 518ml ethyl acetate filtrate; Filter cake is washed with 30mL ethyl acetate, and after suction filtration, washing filtrate and ethyl acetate The ester filtrates are combined to concentrate and purify sucralose-6-acetate in subsequent processes;

[0031] (3) Add 100mL of methanol to soak the above-mentioned filter cake for 30min, and suction filter to obtain 35.8g of filter...

Embodiment 2

[0034] In this embodiment, a method for removing inorganic salts and organic impurities in sucralose chlorinated liquid, the steps are as follows:

[0035] (1) 500mL of sucralose-6-acetate mixed solution is concentrated and distilled under reduced pressure at 100°C by a concentrating evaporator to form a viscous syrup; then add 750mL of methyl acetate at 40°C and stir to precipitate crystals , to obtain the crystallized mixed material;

[0036] (2) The mixture material after the above-mentioned crystallization is cooled to room temperature and carries out suction filtration, obtains 43.6g black filter cake and 756mL methyl acetate filtrate; Filter cake is washed with 50mL methyl acetate, and after suction filtration, washing filtrate and methyl acetate The ester filtrates are combined to concentrate and purify sucralose-6-acetate in subsequent processes;

[0037] (3) Add 150mL of ethanol to soak the above-mentioned filter cake for 30min, and suction filter to obtain 32.3g of ...

Embodiment 3

[0040] In this embodiment, a method for removing inorganic salts and organic impurities in sucralose chlorinated liquid, the steps are as follows:

[0041] (1) 500mL sucralose-6-acetate mixed solution, concentrated and distilled under reduced pressure at 100°C by a concentrating evaporator to form a viscous syrup; then add 1000mL butyl acetate at 30°C, stir to precipitate crystals , to obtain the crystallized mixed material;

[0042] (2) The mixture material after the above-mentioned crystallization is cooled to room temperature and carries out suction filtration, obtains 45.1g black filter cake and 1008mL butyl acetate filtrate; Filter cake is washed with 50mL butyl acetate, and after suction filtration, washing filtrate and butyl acetate The ester filtrates are combined to concentrate and purify sucralose-6-acetate in subsequent processes;

[0043] (3) Add 150 mL of n-propanol to soak the above-mentioned filter cake for 30 minutes, and suction filter to obtain 34.5 g of fil...

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PUM

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Abstract

The invention discloses a method for removing an inorganic salt and organic impurities from a sucralose chlorinated liquid. The method comprises the following steps: directly extracting sucralose-6-ethyl ester in the chlorinated liquid by adopting an organic solvent I; filtering to separate the organic solvent containing the sucralose-6-ethyl ester from the inorganic salt and the organic impurities; adding filter residues into an organic solvent II for dissolving; washing and filtering to separate the organic impurities from the inorganic salt; carbonizing the organic impurities to obtain carbon slag which is easy to treat. By adopting the method, the problems of waste water distillation and degradation caused by taking water as a solvent in an extraction process are solved, and the difficulty and cost of waste water treatment are lowered greatly; moreover, the inorganic salt in a system can be separated out by 98 percent or more, and the separated inorganic salt is free from chlorinated sugar organic matters, so that the difficulty in filtering crystals caused by enriching of the organic matters in a mother liquor recycling process is solved; meanwhile, the subsequent treatment pressure is lowered greatly, and the environmental protection treatment difficulty in the degradation of waste slag is lowered effectively; the method can meet the industrial production demand.

Description

technical field [0001] The invention relates to the technical field of chemical production waste treatment, in particular to a method for removing inorganic salts and organic impurities from chlorinated liquid in the production process of sucralose. Background technique [0002] Sucralose, referred to as sucralose, is a synthetic high-intensity sweetener whose sweetness is 500-600 times that of sucrose. Because it is non-toxic and safe, it does not participate in metabolism in the human body and is not absorbed by the human body. Its sweetness is also very similar to sucrose, so it is regarded as an ideal sucrose substitute. [0003] The preparation process of sucralose is obtained by replacing the hydroxyl groups at the specific 4, 1', and 6' positions of sucrose with chlorine atoms using sucrose as the raw material. In the production process, chlorination reagents such as thionyl chloride are usually used to carry out chlorination reaction at high temperature to prepare t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07H13/04C07H1/06
CPCC07H1/06C07H13/04
Inventor 崔灿罗华东陆夏莲赖道健邱语康陈子昂
Owner TECHNO (FUJIAN) FOOD INGREDIENTS CO LTD