Method of cleanly recovering and reutilizing glyphosate after inactivation with activated carbon catalyst

An activated carbon and catalyst technology is applied in the field of clean recycling and reuse of activated carbon catalysts for glyphosate after deactivation, which can solve problems such as non-compliance with the concept of clean recycling of resources, secondary pollution, etc. Effects of Solid Hazardous Waste

An activated carbon and catalyst technology is applied in the field of clean recycling and reuse of activated carbon catalysts for glyphosate after deactivation, which can solve problems such as non-compliance with the concept of clean recycling of resources, secondary pollution, etc. Effects of Solid Hazardous Waste

CN108722500APending Publication Date: 2018-11-02辽宁格瑞凯特科技有限公司
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  • Method of cleanly recovering and reutilizing glyphosate after inactivation with activated carbon catalyst
  • Method of cleanly recovering and reutilizing glyphosate after inactivation with activated carbon catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A method for cleaning and reusing glyphosate after being deactivated by an activated carbon catalyst, comprising the steps of:

[0052] 1) Oxidation treatment: put 2 kg of deactivated activated carbon catalyst into the roasting furnace, under 4.75L / min N 2 Under protection, the temperature was raised to 300°C at a rate of 5°C / min, and then oxygen was introduced at a rate of 0.25L / min, and oxidized and roasted for 6h;

[0053] 2) Reduction heat treatment: After the oxidation treatment is completed, stop feeding oxygen, at 4.75L / min N 2 Under protection, the temperature was raised to 700°C at a rate of 5°C / min, kept for 0.5h, and then 0.2L / min of H 2 , 700 ℃ constant temperature roasting 6h, after cooling down to room temperature to obtain regenerated activated carbon Re-1.

Embodiment 2

[0055] A method for cleaning and reusing glyphosate after being deactivated by an activated carbon catalyst, comprising the steps of:

[0056] 1) Oxidation treatment: put 2 kg of deactivated activated carbon catalyst into the roasting furnace, under 4.75L / min N 2 Under protection, the temperature was raised to 350°C at a rate of 5°C / min, and then oxygen was introduced at a rate of 0.25L / min, and oxidized and roasted for 4h;

[0057] 2) Reduction heat treatment: After the oxidation treatment is completed, stop feeding oxygen, at 4.75L / min N 2 Under protection, the temperature was raised to 600°C at a rate of 5°C / min, kept for 0.5h, and then 0.2L / min of H 2 , 600 ℃ constant temperature roasting 8h, after cooling down to room temperature to obtain regenerated activated carbon Re-2.

Embodiment 3

[0059] A method for cleaning and reusing glyphosate after being deactivated by an activated carbon catalyst, comprising the steps of:

[0060] 1) Oxidation treatment: Put 2kg of deactivated activated carbon catalyst into the roasting furnace, under 4.5L / min N 2 Under protection, the temperature was raised to 350°C at a rate of 5°C / min, and then oxygen was introduced at a rate of 0.5L / min, and oxidized and roasted for 6h;

[0061] 2) Reduction heat treatment: After the oxidation treatment is completed, stop feeding oxygen, at 4.5L / min N 2 Under protection, the temperature was raised to 800°C at a rate of 5°C / min, kept for 0.5h, and then 0.3L / min of H 2 , 700 ℃ constant temperature roasting 8h, after cooling down to room temperature to obtain regenerated activated carbon Re-3.

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Abstract

The invention discloses a method of cleanly recovering and reutilizing glyphosate after inactivation with an activated carbon catalyst. The method comprises the following steps of 1) oxidation treatment: heating the inactivated activated carbon catalyst at an atmosphere of oxygen-depleted air, rising the temperature to 100-500 DEG C, and performing oxidizing roasting for 2-12 hours; and 2) reduction heat treatment: heating the activated carbon catalyst after oxidation treatment under inert atmosphere protection, rising the temperature to 300-1,500 DEG C, introducing reducing gas for roasting for 0.5-24 hours, and performing cooling at an inert atmosphere to a room temperature to obtain the regenerated activated carbon catalyst. The use effect of the catalyst regenerated with the method isconsistent to the use effect of a fresh catalyst, the regenerated catalyst can be cyclically used for the process of producing the glyphosate with pmida, other pollution-carrying reagents are not usedin the regeneration process, secondary pollution cannot be caused, and the regeneration cost is low.

Description

technical field [0001] The invention belongs to the field of catalyst preparation, and in particular relates to a method for cleaning, recycling and reusing glyphosate after deactivation of an activated carbon catalyst. Background technique [0002] Glyphosate (chemical name: N-(phosphonomethyl) glycine, English name: glyphosate) was first successfully developed by Monsanto Chemical Company in the United States in 1974. herbicide. With the successful development and large-scale planting of glyphosate transgenic crops, as well as the promotion of biofuel crops caused by the energy crisis, glyphosate has become the largest and fastest growing herbicide variety in the world. [0003] In the international mainstream iminodiacetic acid production route of glyphosate, the key step is the catalytic oxidation of diglyphosate to synthesize glyphosate. Hershman disclosed in US3969398 that commercially available activated carbon (hereinafter referred to as "Norit activated carbon") i...

Claims

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Application Information

Patent Timeline
02 Nov 2018
Publication
CN108722500A
IPC
B01J38/02; B01J38/12; B01J38/10; B01J21/20; B01J21/18; C07F9/38
CPC
B01J21/18; B01J21/20; B01J38/02; B01J38/10; B01J38/12; C07F9/3813; Y02P20/584
Inventors
鲁辰