Method for treating glyphosate byproduct namely industrial sodium chloride by using fluidized bed

Abstract

The invention discloses a method for treating a glyphosate byproduct namely industrial sodium chloride by using a fluidized bed. The method comprises the following steps: crushing a glyphosate byproduct (industrial sodium chloride), adding crushed sodium chloride into a fluidized bed reactor, taking air as carrier gas, introducing air from the bottom of the fluidized bed reactor, carrying out a solid-phase oxygen cracking reaction on sodium chloride particles and an oxygen cracking catalyst under a fluidized state so as to purify sodium chloride; making the purified sodium chloride into a sodium chloride aqueous solution, carrying out solid-liquid separation to obtain the oxygen cracking catalyst and a sodium chloride aqueous solution, returning the oxygen cracking catalyst to the fluidized bed reactor, removing phosphorus from the sodium chloride aqueous solution, and delivering sodium chloride aqueous solution to a deionized membrane caustic soda production section so as to convert sodium chloride into resources. The glyphosate byproduct (industrial sodium chloride) is subjected to oxygen cracking treatment in the fluidized bed reactor, the treatment time is greatly shortened, the treatment temperature is reduced, the treatment cost of the waste salt is reduced, and no secondary pollution (flue gas) is generated after the oxygen cracking treatment.

Description

technical field [0001] The invention belongs to the field of by-product salt recovery, and relates to a method for treating glyphosate by-product industrial sodium chloride salt with a fluidized bed. The method can greatly reduce the total carbon value of the by-product sodium chloride salt. Background technique [0002] Glyphosate is widely used in genetically modified agriculture, traditional agriculture, and weed control in roads, orchards, gardens, family yards and other occasions, accounting for 30% of the global herbicide market share. During the production of glyphosate, a large amount of by-product salt is produced, and about 1 ton of by-product salt is produced for every ton of glyphosate produced. The main component of glyphosate by-product salt is sodium chloride, containing a small amount of sodium phosphate, bisglyphosate, glyphosate ammonium salt, glyphosate diammonium salt, glyphosate isopropylamine salt, glyphosate potassium salt, grass Glyphosate sodium sal...

AI Technical Summary

Problems solved by technology

[0003] Chinese patent application CN106608648A discloses a treatment method for by-product industrial salt, the industrial salt is purified through deionized water washing, high temperature melting, cooling crystallization and other processes, the Method After high-temperature melting, there are waste gas formed by high-temperature oxidation of organic matter and secondary pollution caused by molten waste, and the cost of discharging the three wastes is relatively high.

[0005] Chinese patent CN106475398A discloses a process for the treatment of industrial salt organic matter, which converts organic matter into carbide salt output by means of drying, decomposition, carbonization, etc., and its high temperature The air heating furnace and other processes involved in carbonization need to control the temperature at 1000°C to 1100°C, and the processing cost is relatively high

[0006] Chinese patent CN1669929A ​​discloses a method for recycling industrial salts containing amines, phenols, ethers and other volatile or easily decomposed organic impurities. Salt production can only meet the requirements of industrial salt, but cannot meet the high requirements of ion membrane caustic soda salt, and the calcination time is 4 to 10 hours, and the processing cost is high

[0007] Chinese patent CN104014578A discloses a process for decomposing waste industrial salt organic matter, which involves the addition of a catalyst. Because the ion-exchange membrane caustic soda is demanding on the salt index, in The added catalyst needs to be removed in the subsequent steps, which increases the treatment process and cost, and the treated salt cannot meet the salt demand for ion membrane caustic soda

[0008] He Zhouchu et al. disclosed a method for the comprehensive utilization of glyphosate by-product salt slag, which was calcined at 470°C for 6 hours and added 1.25% phosphorus removal agent The expansion experiment was carried out on glyphosate by-product salt slag under certain conditions, but the calcination time during the experiment was too long, resulting in low production capacity and high treatment cost, and the treated salt was not refined, and it was not mentioned whether it could be applied to ion Membrane caustic soda, industrial application is still not ideal