Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Method for treating glyphosate waste water and reducing the emission of carbon dioxide

A glyphosate wastewater and treatment method technology, which is applied in the field of wastewater treatment method manufacturing, can solve the problems of energy and resource consumption, large alkali consumption, and low quality, and achieve the effects of reducing emissions, good quality, and realizing resource utilization

Active Publication Date: 2009-12-02
HANGZHOU TIAN CHUANG ENVIRONMENTAL TECH
View PDF2 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But there are following problems in this method: 1, the pH value of adding alkali to remove formic acid must be more than 5.0, and the alkali consumption is big, simultaneously because the pH is high, the formaldehyde in the waste water after alkali treatment can't generate urotox by adding ammonia 2, remove formaldehyde with the heating method or add hydrogen peroxide method to remove formaldehyde will produce a large amount of carbon dioxide, damage the environment, and consume a lot of energy and resources; 3, the method of removing formaldehyde with ammonia production of urotropine Formic acid is not pre-removed, ammonium formate is mixed in urotropine, the quality is not high

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Example 1: A method for treating glyphosate wastewater that reduces carbon dioxide emissions. Glyphosate wastewater is prepared from glyphosate by the iminodiacetic acid method. After the oxidation of diglyphosate is completed, the extracted glyphosate is Wastewater, (1) add alkali to adjust pH in glyphosate wastewater, control pH=3~5, obtain corresponding formate solution; (2) the solution of step (1) is concentrated and separated by membrane integration method, and the mass fraction obtained is 5% to 25% formate solution and 0.5% to 5% formaldehyde aqueous solution with a mass fraction of ①; (3) The formate solution in step (2) is evaporated and dehydrated by steam and solid-liquid separation to obtain formate wet powder and formaldehyde aqueous solution with a mass fraction of 0.5% to 5% ②, the formate wet powder is dried to obtain the finished product; (4) the formaldehyde aqueous solution is added to ammonia according to 0.15% to 3% of the mixed weight of ① and ② to...

Embodiment 2

[0010] Example 2: On the basis of Example 1, (1) add alkali to the glyphosate wastewater to adjust the pH, control the pH=3, and obtain the corresponding formate solution; (2) the solution of step (1) adopts the membrane integration method Concentrate and separate to obtain a formate solution with a mass fraction of 5% and an aqueous formaldehyde solution with a mass fraction of 0.5% ①; (3) the formate solution in step (2) is evaporated and dehydrated by steam, and separated from solid and liquid to obtain formate Wet powder and formaldehyde solution with a mass fraction of 0.5% ②, the formate wet powder is dried to obtain the finished product; (4) add ammonia to the formaldehyde solution according to 0.15% of the mixed weight of ① and ② to obtain a mass fraction of 0.3% The urotropine aqueous solution, and then the urotropine was concentrated to 10% by membrane separation.

Embodiment 3

[0011] Embodiment 3: On the basis of embodiment 1, (1) add alkali to adjust pH in glyphosate waste water, control pH=5, obtain corresponding formate solution; (2) the solution of step (1) adopts membrane integration method Concentrate and separate to obtain a formate solution with a mass fraction of 25% and a formaldehyde solution with a mass fraction of 5% ①; (3) the formate solution in step (2) is evaporated and dehydrated by steam, and separated from solid and liquid to obtain formate Wet powder and formaldehyde solution with a mass fraction of 5% ②, the formate wet powder is dried to obtain the finished product; (4) Add ammonia to the formaldehyde solution according to 3% of the mixed weight of ① and ② to obtain a mass fraction of 4% The urotropine aqueous solution is then separated by membrane to concentrate the urotropine to 25%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
pore sizeaaaaaaaaaa
quality scoreaaaaaaaaaa
quality scoreaaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for treating glyphosate waste water and reducing the emission of carbon dioxide. The glyphosate waste water is obtained by extracting glyphosate after the N-phosphonomethyliminodiacetic acid is oxidized in the process of preparing the glyphosate by using an iminodiacetic acid method. Urotropine finished products are prepared by the following steps: (1) adding alkali into the glyphosate waste water, and adjusting and controlling the pH value to between 3 and 5 to obtain corresponding formate solution; (2) performing condensing separation on the solution of the step (1) by a film integration method to obtain 5 to 25 percent formate solution and 0.5 to 5 percent obenzaldehyde water solution (1); (3) performing evaporating, dehydration and solid-liquid separation on the formate solution of the step (2) to obtain formate wet powder and 0.5 to 5 percent benzaldehyde water solution (2), and drying the formate wet powder to obtain the finished product; (4) adding ammonia accounting for 1.5 to 3 percent the benzaldehyde water solution (1) and the benzaldehyde water solution (2) to obtain 0.3 to 4 percent urotropine water solution, and improving the concentration of the urotropine to between 10 and 25 percent by film separation; and (5) evaporating, separating and drying the urotropine solution to obtain the urotropine finished product.

Description

technical field [0001] The invention relates to a glyphosate wastewater treatment method for reducing carbon dioxide emissions, and belongs to the field of wastewater treatment method manufacturing. Background technique [0002] The patent with the application number: 200810048470.X provides a method for producing urotropine by reacting the waste water with ammonia, but since the method does not remove formic acid, the waste water needs further biochemical treatment, and the produced urotropine has impurities Most of them need to be refined, which leads to problems such as long processing flow and high cost. The patent with application number 200810212211.6 discloses a treatment method for this wastewater: use alkali to react with formic acid to produce formate to remove formic acid or raise the temperature to 80-250°C to remove formic acid, and use hydrogen peroxide to oxidize or add urea to remove formaldehyde or the method of adding ammonia to produce urotropine to remov...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C07D487/18C02F1/66C02F1/44C02F1/04
Inventor 丁国良赵经纬刘和德邱晖陈健姜新建夏金维
Owner HANGZHOU TIAN CHUANG ENVIRONMENTAL TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products