Device for recycling N-Phosphonomethyl aminodiacetic acid from waste water in N-Phosphonomethyl aminodiacetic acid production process
A production process, the technology of bisglyphosate, applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, compounds of Group 5/15 elements of the periodic table, etc., can solve the problem of high activity catalyst and environmental pollution and other problems, to achieve the effect of reusing bisglyphosate
Inactive Publication Date: 2013-09-11
ZHEJIANG BAIKE KAIPU CHEM
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[0008] At present, there are two main process routes for the production of bisglyphosate in my country: one is the glycine-dimethyl phosphite method, which is the earliest technology developed in my country, and the mature technology is currently the process route adopted by most production enterprises. The disadvantage is serious environmental pollution , requires a highly active catalyst; the second is iminodiacetic acid (IDA method), which is the process route for the production of bisglyphosate that we have developed in recent years, and its products are welcomed by foreign users, especially in the United States, Europe and other places
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[0034] The specific embodiments of the present invention will be described in detail below in conjunction with the drawings.
[0035] Such as figure 1 The method for preparing glyphosate aqua by recovering glyphosate from the waste water of the glyphosate production process is shown, and the method includes the following steps:
[0036] (1) The pH of the wastewater in the wastewater tank is about -0.1, and the content of diglycphosate is 0.7%-1.5%. Add soda ash to adjust the pH appropriately, and then add 27.5% hydrogen peroxide dropwise to remove formaldehyde.
[0037] (2) This waste water enters the neutralization kettle, adjusts the PH value with 98% content soda ash and 32% ion-exchange membrane caustic (control PH=5), enters the three-effect evaporation system, and the three-effect evaporated waste water enters the evaporation kettle (20m 3 ), distill the acidic water into the biochemical treatment system.
[0038] (3) The material in the kettle (filter cake) enters the two-stage...
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The invention relates to a method, application and a device for recycling N-Phosphonomethyl aminodiacetic acid from waste water in an N-Phosphonomethyl aminodiacetic acid production process. The device comprises a waste water tank, a waste water neutralization kettle, a triple effect evaporation system, a first evaporation kettle, a centrifugal machine, a mother liquid tank, a second evaporation kettle and a suction filtration cylinder, wherein an acid water steam outlet of the first evaporation kettle is connected with a biochemical treatment system. Due to the adoption of the device, the content of N-Phosphonomethyl aminodiacetic acid in prepared N-Phosphonomethyl aminodiacetic acid solution is about 13%, so that the subsequent use of the N-Phosphonomethyl aminodiacetic acid can be facilitated. The problem in recycling the N-Phosphonomethyl aminodiacetic acid can be solved, N-Phosphonomethyl aminodiacetic acid and phosphorous acid in the waste water can be treated, so that the phosphorus content in the waste water is reduced, and the discharged waste water can accord with national standards.
Description
[0001] The application for the present invention is the patent number: 201010510542.5, and the patent name is: The method and application and special equipment for the recovery of glyphosate from the waste water of the glyphosate production process. The filing date is: the divisional application of the invention patent application on 2010-10-18 . Technical field [0002] The invention relates to a method, application and special equipment for recovering glyphosate from waste water of a glyphosate production process. Background technique [0003] Glyphosate (N; N-diacetic acid carbamate phosphoric acid) is a clean white powder. [0004] Its molecular formula: C 5 N 10 NO 7 P [0005] Molecular structural formula: [0006] [0007] Glyphosate is the main raw material of the pesticide herbicide glyphosate. Glyphosate is an efficient, low-temperature, residue-free, broad-spectrum herbicide that is widely used in agriculture, forestry, industrial transportation and other industries, inclu...
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IPC IPC(8): C02F9/14C07F9/38
Inventor 陈忠良陈如凤
Owner ZHEJIANG BAIKE KAIPU CHEM