A hydrolysis device for producing glyphosate by glycine method

Abstract

The invention relates to a hydrolysis and solvent recovery device in a production process of glyphosate employing a glycine method. A synthesis kettle is connected with a methanol removal kettle; the methanol removal kettle is connected with a U-shaped pipe and then connected with a hydrolysis kettle; an acid methanol metering tank and a hydrochloric acid metering tank are connected with the hydrolysis kettle separately; the hydrolysis kettle is connected with a demister; the demister is connected with a condenser I through a pipe; the top of the condenser I is connected with a dechlorinated methane recovery post, and the bottom of the condenser I is connected with a methanol and methylal water solution receiving tank; the methanol and methylal water solution receiving tank is connected with a solvent recovery post and an exhaust absorption tower separately; the bottom of the hydrolysis kettle is connected with a crystallization kettle through a pipe; and the crystallization kettle is connected to a glyphosate washing machine to obtain glyphosate. Compared with an existing hydrolysis and solvent recovery technology for producing the glyphosate employing the glycine method, the hydrolysis and solvent recovery device has the advantages that methanol recovery waste water can be reduced by over 2.5t / t, the amount of a mother liquid is reduced by over 0.3t / t, the steam consumption is reduced by over 1.5t / t, the electricity is saved by over 80KWh / t, the yield of chloromethane is improved by 0.3t / t, the yield of the glyphosate is improved by over 0.3%, and the production cost of the glyphosate is reduced by 15%-20%.

Description

technical field [0001] The invention relates to a device for the hydrolysis process and the solvent recovery process of the glycine-based glyphosate production process, and belongs to the technical field of glyphosate production processes. Background technique [0002] Glyphosate is a systemic, efficient, low-toxic, broad-spectrum, and destructive herbicide. It was first developed by Monsanto in the United States. It has been produced and used for more than 40 years. It is currently the largest pesticide in the world. . my country is one of the major producers of glyphosate. In 2015, the production capacity of the glyphosate industry was about 700,000 tons, and the actual output was about 460,000 tons. Both the production capacity and output rank first in the world. There are two production routes of glyphosate: glycine-alkyl ester method (referred to as glycine method) and iminodiacetic acid method (referred to as IDA method). In my country's glyphosate industry, the glyc...

AI Technical Summary

Problems solved by technology

The introduction of a large amount of water has caused a series of problems such as large amount of process waste liquid such as mother liquor and methanol waste water, waste liquid entrainment and loss of dissolved materials, high pressure on environmental protection, and high process energy consumption.

In addition, due to the large amount of water introduced, and the specific heat capacity and phase change enthalpy of water are high, the energy consumption is high in the processes of heating up, evaporating, cooling down, condensing, rectifying and separating, etc.

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