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Method and device for oxidation and alkaline hydrolysis of sucralose rectification wastewater

A sucrose and alkali oxide technology, applied in chemical instruments and methods, water pollutants, water/sewage treatment and other directions, can solve the problems of low quality of dilute ammonia water, restrict DMF reuse, affect sales, etc., and achieve convenient operation, The effect of reducing the processing capacity and reducing the material resistance

Inactive Publication Date: 2021-05-04
ANHUI JINGHE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the dilute ammonia water produced by the existing DMF rectification wastewater aeration ammonia is not high in quality, which affects sales, thereby restricting the reuse of DMF in the previous section, and provides a sucralose rectification wastewater oxidation Alkaline hydrolysis method and device

Method used

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  • Method and device for oxidation and alkaline hydrolysis of sucralose rectification wastewater
  • Method and device for oxidation and alkaline hydrolysis of sucralose rectification wastewater

Examples

Experimental program
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Effect test

Embodiment 1

[0022] (1) Send 20,000L of DMF rectification wastewater and 400L of hydrogen peroxide (mass concentration 27.5%) into the mixer, fully stir and mix for 60 minutes, then pour into the mixing tank, and then send the materials into the alkaline hydrolysis reaction tower at an amount of 2000L / h;

[0023] (2) Add liquid caustic soda (sodium hydroxide) to the alkaline hydrolysis reaction tower in an amount of 100L / h, control the pH value of the solution in the alkali hydrolysis reaction tower at 12, the temperature at 103°C, and control the reflux ratio of 1:0.5, the alkali The light phase extracted from the top of the hydrolysis reaction tower is sent to the waste water tank, and then sent to make dilute ammonia water, and the heavy phase extracted from the bottom of the alkali hydrolysis reaction tower enters the heavy phase receiving tank, and then sent to the sewage station for biochemical treatment.

Embodiment 2

[0025] (1) Send 20000L of DMF rectification wastewater and 300L of hydrogen peroxide (mass concentration 30%) into the mixer, fully stir and mix for 70 minutes, then put them into the mixing tank, and then send the materials into the alkaline hydrolysis reaction tower at an amount of 2000L / h;

[0026] (2) Add liquid caustic soda (sodium hydroxide) to the alkaline hydrolysis reaction tower in an amount of 100L / h, control the pH value of the solution in the alkali hydrolysis reaction tower at 12, the temperature at 102°C, and control the reflux ratio of 1:0.8. The light phase extracted from the top of the hydrolysis reaction tower is sent to the waste water tank, and then sent to make dilute ammonia water, and the heavy phase extracted from the bottom of the alkali hydrolysis reaction tower enters the heavy phase receiving tank, and then sent to the sewage station for biochemical treatment.

Embodiment 3

[0028] (1) Send 20,000L of DMF rectification wastewater and 450L of hydrogen peroxide (mass concentration 25%) into the mixer, fully stir and mix for 50 minutes, then put them into the mixing tank, and then send the materials into the alkaline hydrolysis reaction tower at an amount of 2000L / h;

[0029] (2) Add liquid caustic soda (sodium hydroxide) into the alkaline hydrolysis reaction tower in an amount of 100L / h, control the pH value of the solution in the alkali hydrolysis reaction tower at 12, the temperature at 105°C, and control the reflux ratio of 1:1. The light phase extracted from the top of the hydrolysis reaction tower is sent to the waste water tank, and then sent to make dilute ammonia water, and the heavy phase extracted from the bottom of the alkali hydrolysis reaction tower enters the heavy phase receiving tank, and then sent to the sewage station for biochemical treatment.

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Abstract

The invention relates to a method and device for oxidation and alkaline hydrolysis of sucralose rectification wastewater. The method is characterized by comprising the following steps: (1) feeding DMF rectification wastewater and hydrogen peroxide into a mixer according to a volume ratio of (50-60): 1, fully stirring and mixing the mixture for 50-80 minutes, pumping the mixture into a mixing tank, and then feeding the material into an alkaline hydrolysis reaction tower according to the amount of 2000-2500 L / h; and (2) adding liquid caustic soda into the alkaline hydrolysis reaction tower according to the amount of 100-150 L / h, controlling the pH value of the solution in the alkaline hydrolysis reaction tower to be 12-13, the temperature to be 102-105 DEG C and the reflux ratio to be 1: (0.5-1), feeding a light phase extracted from the top of the alkaline hydrolysis reaction tower into a wastewater tank and then sending the light phase to prepare dilute ammonia water, feeding a heavy phase extracted from the bottom of the alkaline hydrolysis reaction tower into a heavy phase receiving tank, and then feeding the heavy phase into a sewage station for biochemical treatment. The method has the advantages of simple process, convenience in operation and low equipment cost; DMF, sulfide and the like in the wastewater can be effectively degraded, odor is removed, transparent and odor-free dilute ammonia water is prepared, the dilute ammonia water can be successfully sold, and the material blocking problem of the previous DMF recycling procedure is reduced; and the treatment capacity of rectification wastewater is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of sucralose production, and relates to a method and a device for oxidation and alkali hydrolysis of sucralose rectification wastewater. Background technique [0002] As a new type of sweet food additive, sucralose has more advantages than sucrose, saccharin, AK sugar, aspartame, stevioside, etc. It has high safety and stable performance, and is a new type of high-quality , non-nutritional high-efficiency sweetener, is the best ideal sweet substitute for food for obesity, cardiovascular disease and diabetes patients; it also belongs to the field of fine chemical products, and is a branch product of food additives. It is not only widely used in health food and medicine, but also widely used in more than 300 kinds of processed products such as baked food, beverage, chewing coffee, dairy products, frozen snacks, ice cream, pudding, jelly, jam, syrup, etc. , has been widely accepted by the market and has become...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/10C02F101/30C02F101/34C02F101/38
CPCC02F1/66C02F1/722C02F2101/101C02F2101/30C02F2101/34C02F2101/38
Inventor 夏家信王东石剑
Owner ANHUI JINGHE IND