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Method for recycling sulfaquinoxaline process wastewater

A technology for sulfaquinoxaline and waste water recovery, applied in chemical instruments and methods, natural water treatment, water/sewage multi-stage treatment, etc., can solve problems affecting the growth and reproduction of coccidia, hindering the synthesis of tetrahydrofolate, and hindering dihydrofolate Synthesis and other issues

Pending Publication Date: 2022-07-12
佛山市南海北沙制药有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Sulfaquinoxaline belongs to the sulfonamide antibacterial drug, which is used for coccidiosis of livestock and poultry. It can compete with the dihydrofolate synthase in the coccidia to hinder the synthesis of dihydrofolate, resulting in the blockage of the synthesis of tetrahydrofolate. As a result, the synthesis of nucleic acid is hindered, which affects the growth and reproduction of coccidia

Method used

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  • Method for recycling sulfaquinoxaline process wastewater
  • Method for recycling sulfaquinoxaline process wastewater

Examples

Experimental program
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Effect test

Embodiment 1

[0027] see attached figure 1 As shown, a method for recycling sulfaquinoxaline process waste water, comprising the following steps:

[0028] S1. 1.0~1.4:1.2~1.7:1.25~1.75 are weighed respectively with molar ratio of sulfonamide: 2-chloroquinoxaline: potassium carbonate, and then sulfonamide, 2-chloroquinoxaline, potassium carbonate are poured into the 2000L reactor respectively Mix and stir in the middle, and carry out condensation reaction after being warming up to 140 degrees Celsius, and the reaction times is 4 hours; Specifically, get sulfonamide: 2-chloroquinoxaline: the mol ratio of potassium carbonate is 1.0: 1.2: 1.25, namely sulfonamide 200kg, 2- Chloroquinoxaline 240kg, potassium carbonate 250kg, sulfonamide is industrial sulfonamide.

[0029] S2. after step S1 completes the reaction, that is, when the mass content of sulfonamide in the material is less than 10%, the condensation reaction is stopped, 1600L of tap water is added for stirring and dissolving, then 20kg...

Embodiment 2

[0035] see attached figure 1 As shown, a method for recycling sulfaquinoxaline process waste water, comprising the following steps:

[0036] S1. 1.0~1.4:1.2~1.7:1.25~1.75 are weighed respectively with molar ratio of sulfonamide: 2-chloroquinoxaline: potassium carbonate, and then sulfonamide, 2-chloroquinoxaline, potassium carbonate are poured into the 2000L reactor respectively Mix and stir in the middle, and carry out condensation reaction after being warming up to 140 degrees Celsius, and the reaction times is 4 hours; Specifically, get sulfonamide: 2-chloroquinoxaline: the mol ratio of potassium carbonate is 1.4: 1.7: 1.75, namely sulfonamide 280kg, 2- Chloroquinoxaline 340kg, potassium carbonate 350kg, sulfonamide is industrial sulfonamide.

[0037] S2. after step S1 completes the reaction, that is, when the mass content of sulfonamide in the material is less than 10%, the condensation reaction is stopped, 1600L of tap water is added for stirring and dissolving, then 20kg...

Embodiment 3

[0043] see attached figure 1 As shown, a method for recycling sulfaquinoxaline process waste water, comprising the following steps:

[0044] S1. 1.0~1.4:1.2~1.7:1.25~1.75 are weighed respectively with the molar ratio of sulfonamide: 2-chloroquinoxaline: potassium carbonate, and then sulfonamide, 2-chloroquinoxaline, potassium carbonate were poured into the 2000L reactor respectively Mix and stir in the middle, and carry out condensation reaction after being warming up to 140 degrees Celsius, and the reaction times is 4 hours; Specifically, get sulfonamide: 2-chloroquinoxaline: the mol ratio of potassium carbonate is 1.2: 1.4: 1.5, namely sulfonamide 240kg, 2- Chloroquinoxaline 280kg, potassium carbonate 300kg, sulfonamide is industrial sulfonamide.

[0045] S2. after step S1 completes the reaction, that is, when the mass content of sulfonamide in the material is less than 10%, the condensation reaction is stopped, 1600L of tap water is added for stirring and dissolving, then ...

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Abstract

The invention discloses a sulfaquinoxaline process wastewater recycling method, which comprises the following steps: firstly, mixing and stirring sulfanilamide, 2-chloroquinoxaline and potassium carbonate, and then sequentially carrying out activated carbon decoloration, filtration, neutralization precipitation and filtration to prepare solid sulfaquinoxaline and process wastewater, adding dichloromethane into the process wastewater to extract organic matters in the process wastewater so as to form a water phase and an organic phase, and finally respectively treating the water phase and the organic phase, the industrial sulfanilamide and sulfaquinoxaline mixture capable of being repeatedly used for condensation reaction, high-purity potassium chloride solid, reusable dichloromethane and recyclable secondary mother liquor are respectively obtained, so that zero discharge of process wastewater is realized, wastes generated in the production process are harmless, the discharge amount of pollutants is reduced, and the production cost is reduced. The environment is effectively protected and resources are saved.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a method for recovering and recycling waste water from a sulfaquinoxaline process. Background technique [0002] Sulfaquinoxaline is a sulfonamide antibacterial drug used for coccidiosis in livestock and poultry. It can compete with the dihydrofolate synthase in the coccidia, hinder the synthesis of dihydrofolate, and cause the synthesis of tetrahydrofolate to be blocked. As a result, the synthesis of nucleic acid is blocked, which affects the growth and reproduction of coccidia. [0003] During the production of sulfaquinoxaline, a large amount of potassium chloride is produced. Reaction equation: [0004] [0005] Potassium chloride is an important raw material for the preparation of nitrogen-potassium fertilizers and has a very good value. Today, potassium chloride and potassium sulfate are the main varieties of potash fertilizers, and the rest are potassium magn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C01D3/04C01D3/14C02F103/36
CPCC02F9/00C01D3/04C01D3/14C02F1/26C02F1/283C02F1/04C02F2103/36Y02A40/20
Inventor 邱伟杰唐艾臣刘来悦徐伟刘明威
Owner 佛山市南海北沙制药有限公司
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