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Phosphorus and impurity removal system and process for glyphosate byproduct high-salt waste salt

A technology of glyphosate and by-products, which is applied in the field of glyphosate by-product high-salt waste salt phosphorus removal and impurity removal system and technology, can solve the problems of high organic matter, complex components, and reduce purification salt, so as to achieve convenient operation and high process efficiency. Low cost, realize the effect of beneficial circulation

Active Publication Date: 2022-01-07
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Patent CN107098360A discloses a method for utilizing glyphosate waste brine to produce raw materials for ion-exchange membrane caustic soda. Microfiltration-nanofiltration membranes are used to intercept organic matter in brine to obtain raw materials for ion-exchange membrane caustic soda. The organic matter in the salt is high and the composition is complex, and it is necessary to further reduce the impurities in the purified salt

Method used

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  • Phosphorus and impurity removal system and process for glyphosate byproduct high-salt waste salt
  • Phosphorus and impurity removal system and process for glyphosate byproduct high-salt waste salt

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Embodiment 1

[0027] The glyphosate by-product high-salt waste salt dephosphorization and impurity removal process of this embodiment comprises the following steps:

[0028] (1) Oxidation and calcination: place the by-product waste salt in a tubular atmosphere furnace, calcinate at a high temperature of 550°C for 2 hours in an oxygen atmosphere, grind the sintered waste salt into fine powder; dissolve 300g of waste salt, and prepare a 30% mass ratio Solution: NaCl concentration in brine is 257.68g / L, TP content is 346.5mg / L, Ca 2+ Content 5.57mg / L, Mg 2+ The content is 3.38mg / L, and the pH is adjusted to 10.12;

[0029] (2) Ultrafiltration and nanofiltration: use an organic 1000Da ultrafiltration membrane to separate the salt solution prepared in step (1) to obtain a clear solution without suspended impurities; wherein, the pressure of the membrane inlet system is 0.4Mpa, and the membrane flux is 492.6 L / h·m 2 ;

[0030] (3) Ultrafiltration and nanofiltration: Utilize organic 150Da nano...

Embodiment 2

[0034] The glyphosate by-product high-salt waste salt dephosphorization and impurity removal process of this embodiment comprises the following steps:

[0035] (1) Oxidation and calcination: place the by-product waste salt in a tubular atmosphere furnace, calcinate at a high temperature of 550°C for 2 hours in an oxygen atmosphere, grind the sintered waste salt into fine powder; dissolve 330g of waste salt, and configure it into a 33% Solution: NaCl concentration in brine is 275.22g / L, TP content is 389.5mg / L, Ca 2+ Content 5.93mg / L, Mg 2+ Content 3.71mg / L, adjust pH to 10.05;

[0036] (2) Ultrafiltration and nanofiltration: use an organic 1000Da ultrafiltration membrane to separate the salt solution prepared in step (1) to obtain a clear solution without suspended impurities; wherein, the pressure of the membrane inlet system is 0.4Mpa, and the membrane flux is 479.5 L / h·m 2 ;

[0037](3) Ultrafiltration and nanofiltration: use an organic 150Da nanofiltration membrane to ...

Embodiment 3

[0041] The glyphosate by-product high-salt waste salt dephosphorization and impurity removal process of this embodiment comprises the following steps:

[0042] (1) Oxidation and calcination: place the by-product waste salt in a tubular atmosphere furnace, and calcine at a high temperature of 550°C for 2 hours in an oxygen atmosphere, and grind the sintered waste salt into fine powder; dissolve 350g of waste salt, and configure it into a 35% Solution: NaCl concentration in brine is 296.64g / L, TP content is 375.5mg / L, Ca 2+ Content 6.45mg / L, Mg 2+ The content is 4.23mg / L, and the pH is adjusted to 9.92;

[0043] (2) Ultrafiltration and nanofiltration: use an organic 1000Da ultrafiltration membrane to separate the salt solution prepared in step (1) to obtain a clear solution without suspended impurities; wherein, the pressure of the membrane inlet system is 0.3Mpa, and the membrane flux is 505.8 L / h·m 2 ;

[0044] (3) Ultrafiltration and nanofiltration: Utilize organic 150Da ...

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Abstract

The invention discloses a phosphorus and impurity removal system and process for glyphosate byproduct high-salt waste salt. The system comprises a purification system for firstly calcining the glyphosate byproduct high-salt waste salt by adopting a tubular atmosphere furnace and then removing phosphorus and impurities from the calcined waste salt. The process comprises the following steps of calcining the byproduct glyphosate high-salt waste salt to prepare a waste salt solution, removing suspended impurities by using an organic ultrafiltration membrane, and intercepting total phosphorus by using an organic nanofiltration membrane, secondly, adding a chemical precipitator to remove residual phosphorus impurities, and finally, adsorbing and removing residual impurities by adopting sodium alginate, and filtering by adopting an inorganic ceramic membrane to prepare purified saline water. According to the system and the process, the total phosphorus content of purified salt water can be 0.25 mg / L or below, the total phosphorus content of purified salt is 0.6 mg / kg or below, and calcium and magnesium ions in a waste salt solution can be removed after sodium alginate adsorption.

Description

technical field [0001] The invention belongs to the field of glyphosate by-product high-salt waste salt treatment, and in particular relates to a system and process for removing phosphorus and impurities from glyphosate by-product high-salt waste salt. [0002] technical background [0003] At this stage, glyphosate is mostly produced by glycine synthesis method, which will generate multiple waste water during production. In China, most of them use evaporation to precipitate waste water to produce crystalline salt. Nowadays, waste glyphosate salt is mostly disposed of through centralized burning, landfill or sale, which cannot achieve the purpose of reuse. Therefore, a series of glyphosate waste salt treatment processes are urgently needed to remove impurities in the waste salt to achieve the purpose of recycling. [0004] Sodium chloride in glyphosate by-product waste salt can be used to prepare caustic soda by electrolysis. If the impurity problem in the glyphosate by-pro...

Claims

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Application Information

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IPC IPC(8): C02F9/04B09B3/10B09B3/40B09B3/70B09B5/00C02F101/10C02F101/30
CPCC02F9/00B09B5/00C02F1/444C02F1/442C02F1/5281C02F1/44C02F1/286C02F2101/105C02F2101/30C02F1/5236Y02P20/10
Inventor 吴其胜张伟健江铭崔咪芬习本军
Owner YANCHENG INST OF TECH
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