Separating, purifying and recycling method of amine substances in sucralose wastewater

A technology for sucralose and amine substances, which is applied in the preparation/separation of ammonia, chemical instruments and methods, purification/separation of amino compounds, etc., can solve the problems of high COD value and poor biodegradability of sucralose wastewater, and achieves Effects of reduced toxicity, improved biodegradability, and lower costs

Inactive Publication Date: 2018-05-18
JIANGNAN UNIV
View PDF3 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sucralose wastewater has a high COD value and poor biodegradability. It belongs to refractory industrial wastewater. The traditional treatment method is to use evaporation to concentrate, and the evaporated liquid is biologically treated and discharged to meet the standard or reused as reclaimed water. However, due to the lack of effective It can only be mixed with plant ash and then landfilled or transported as hazardous solid waste

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

Embodiment 1

[0018] 2000g of sucralose production wastewater with a COD of 90000mg / L, wherein the concentration of ammonium chloride is 3.65%, the concentration of dimethylamine hydrochloride is 6.64%, the concentration of tert-butylamine hydrochloride is 3.51%, and the concentration of N,N-dimethylformamide 0.88%, the concentration of sucralose is 0.49%, the concentration of sucralose-6-ethyl ester is 0.03%, and it also contains a small amount of sucralose, tetrachlorosucrose, sucralose-6-ethyl ester, sucralose-6-ethyl Chlorinated by-products such as esters are first evaporated by thin film evaporation method to obtain 1100g evaporation condensate and 900g concentrate, the COD of the condensate is 5000mg / L, the pollutant is N,N-dimethylformamide, the concentration is 1.58%, It can be directly used as process water in the sucralose synthesis section; the main pollutants of the evaporative condensate are ammonium chloride, dimethylamine hydrochloride, tert-butylamine hydrochloride, three amm...

Embodiment 2

[0020] 1350g of sucralose wastewater was evaporated and concentrated, COD was 198000mg / L, ammonium chloride concentration was 13.0%, dimethylamine hydrochloride concentration was 17.4%, tert-butylamine hydrochloride concentration was 9.2%, and 850g sodium hydroxide saturated solution was added dropwise. Slowly raise the temperature to 95° C. to volatilize the amines in the concentrated solution evenly, and absorb it with 1000 g of pure water to obtain a mixed aqueous solution of amines. Add the aqueous solution to a simulated moving bed chromatography separation system to obtain ammonia solutions, dimethylamine solutions and tert-butylamine solutions with concentrations of 1.8%, 5.1%, and 2.9%, respectively, which can be used as amine solutions in the sucralose synthesis section after proper concentration. First cool down to 5°C to precipitate sodium chloride crystals, filter to obtain 166g sodium chloride crystals, dilute the filtrate with 3 times of tap water, inoculate aerob...

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

No PUM Login to view more

Abstract

The invention provides a separating, purifying and recycling method of amine substances in sucralose wastewater. A resource treating method of the sucralose wastewater comprises the steps of firstly,using an evaporating method to primarily separate the wastewater to obtain evaporation condensate and a concentrated solution, directly using the evaporation condensate as technology water in the sucralose synthesis process, or conducting standard-reaching drainage after biological treatment; adding alkaline into the concentrated solution to be heated to be secondarily separated, so that the aminesubstances in the concentrate solution are volatilized in a gas state and are recycled with acid liquid or water; tertiarily separating volatilization residual liquid according to a cooling and crystalizing method to separate out chlorine salt crystal, after the liquid phase is properly diluted, using a biological method for degrading and harmless treatment and conducting the standard-reaching drainage.

Description

Technical field: [0001] The invention relates to a method for separating, purifying and recovering amines in sucralose wastewater, and belongs to the technical field of industrial wastewater resource treatment and recovery. technical background: [0002] Sucralose is a chlorinated derivative of sucrose in which the 4, 1′, 6′ hydroxyl groups on sucrose are replaced by chlorine atoms, and the configuration of the 4-position carbon atom is reversed. Flavoring agent, which belongs to non-nutritive sweetener, was approved as a food additive by the Food and Agriculture Organization of the United Nations and the World Health Organization (WHO / FAO) in 1990, and was approved as sucralose by the US Federal Drug Administration in 1999. It is currently used in more than 80 countries around the world. countries, more than 4,000 different products are used as sweeteners. Disposal of wastewater generated during the industrial production of this artificial sweetener has become an urgent is...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C07C209/86C07C211/04C07C211/07C01C1/02C02F1/04
CPCC01C1/022C02F1/04C07C209/86C07C211/04C07C211/07
Inventor 魏慧贤
Owner JIANGNAN UNIV
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