A treatment device and method for paraformaldehyde dust in the feeding process of glyphosate production

Abstract

A treatment method and device for paraformaldehyde dust in the feeding process of glyphosate production. The paraformaldehyde feeding port is connected to the dust collection hood. After the dust suction hood is connected to the fan through the pipeline, it is then connected to the bottom of the alcohol washing tower, and the dust exhaust gas The pipeline goes deep into the bottom of the alcohol scrubber; the catalyst pipeline and the methanol pipeline are connected to the lower part of the alcohol scrubber; the top of the alcohol scrubber is connected to the condenser through the pipeline, and the condenser is connected to the non-condensable gas vent. The technical scheme of the present invention uses methanol as an absorbent and uses an alkoxy metal organic compound as a catalyst to absorb paraformaldehyde feeding dust in the glyphosate production process. The absorption speed is fast and the absorption effect is good. The absorbent can be reused, reducing consumption and The row benefit is obvious.

Description

technical field [0001] The invention belongs to the technical field of glyphosate production, in particular to a method and device for controlling paraformaldehyde dust in the glyphosate production and feeding process. Background technique [0002] Glyphosate is a high-efficiency, low-toxicity, broad-spectrum, and herbicide of systemic conduction type. There are two mainstream production methods, one is the production method using iminodiacetic acid (IDA) as the raw material, and the other is the production method using The production method of glycine and alkyl phosphite as raw materials. my country's glyphosate production started in the 1980s, and the glycine-alkyl ester method is the leading method (process) for glyphosate production in my country. The method uses methanol as a solvent and triethylamine as a catalyst, first synthesizes a synthetic liquid with an organic phosphine intermediate as the main component, and then hydrolyzes it under acidic conditions to obtain...

AI Technical Summary

Problems solved by technology

[0012] The traditional process uses water, alkali or glyphosate mother liquor to absorb the dust generated during the paraformaldehyde feeding process. Although it has played a role in eliminating dust, it has the following problems: (1) the absorption liquid is all taken into the mother liquor, and the active ingredient formaldehyde in it is It has not been utilized; (2) Both absorbent and paraformaldehyde / formaldehyde are collected into mother liquor or other production wastewater, and it is extremely difficult to dispose of aldehyde-containing wastewater, which increases the burden on environmental protection; (3) The absorption effect is poor, and the absorption fluid needs to be replaced frequently , the consumption of absorption liquid is large, and the absorption effect is particularly poor at low temperature

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