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Method for preparing pesticide by using biomass hydrothermal carbonization liquid phase and preparing organic fertilizers by using solid phase

A technology of hydrothermal carbonization and solid-phase preparation, applied in botany equipment and methods, chemicals for biological control, biofuels, etc., can solve problems such as air pollution, achieve continuous, mild reaction conditions, and energy The effect of low consumption

Inactive Publication Date: 2016-08-31
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lignin in biomass cannot be decomposed, and it is generally disposed of by field incineration, causing air pollution

Method used

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  • Method for preparing pesticide by using biomass hydrothermal carbonization liquid phase and preparing organic fertilizers by using solid phase
  • Method for preparing pesticide by using biomass hydrothermal carbonization liquid phase and preparing organic fertilizers by using solid phase
  • Method for preparing pesticide by using biomass hydrothermal carbonization liquid phase and preparing organic fertilizers by using solid phase

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Mix 3 g of bagasse and 50 mL of water to obtain a biomass aqueous solution, then add it to a 150 mL high-pressure reactor, close the lid of the kettle, and replace the air in the reactor with nitrogen for 4 times. Then, turn on the condensing device and power supply of the reactor, set the reaction temperature to 225° C., and the stirring speed to 800 rpm. After raising the temperature to 225°C, keep the temperature constant for 5 hours. After the reaction was terminated, the reaction kettle was taken out and cooled to normal temperature, the gas was released, and the lid of the kettle was opened. The solid coke produced by the reaction and the water-phase product rich in stable components such as phenols are taken out, separated with a Buchner funnel, and the solid is dried to obtain organic fertilizer. The liquid-phase product is extracted with ethyl acetate and used to prepare pesticides.

Embodiment 2

[0026] Mix 3 g of bagasse and 50 mL of water to obtain a biomass aqueous solution, then add it to a 150 mL high-pressure reactor, close the lid of the kettle, and replace the air in the reactor with nitrogen for 4 times. Then, turn on the condensing device and power supply of the reactor, set the reaction temperature to 255° C., and the stirring speed to 800 rpm. After heating up to 255°C, keep the temperature constant for 5 hours. After the reaction was terminated, the reaction kettle was taken out and cooled to normal temperature, the gas was released, and the lid of the kettle was opened. The solid coke produced by the reaction and the water-phase product rich in stable components such as phenols are taken out, separated with a Buchner funnel, and the solid is dried to obtain organic fertilizer. The liquid-phase product is extracted with ethyl acetate and used to prepare pesticides.

Embodiment 3

[0028] Mix 3 g of bagasse and 50 mL of water to obtain a biomass aqueous solution, then add it to a 150 mL high-pressure reactor, close the lid of the kettle, and replace the air in the reactor with nitrogen for 4 times. Then, turn on the condensing device and the power supply of the reactor, set the reaction temperature to 265° C., and the stirring speed to 800 rpm. After raising the temperature to 265°C, keep the temperature constant for 5 hours. After the reaction was terminated, the reaction kettle was taken out and cooled to normal temperature, the gas was released, and the lid of the kettle was opened. The solid coke produced by the reaction and the water-phase product rich in stable components such as phenols are taken out, separated with a Buchner funnel, and the solid is dried to obtain organic fertilizer. The liquid-phase product is extracted with ethyl acetate and used to prepare pesticides.

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Abstract

The invention belongs to the technical field of biomass resource utilization, and discloses a method for preparing pesticide by using biomass hydrothermal carbonization liquid phase and preparing organic fertilizers by using solid phase. The method comprises the following steps: uniformly mixing biomass raw materials with water to obtain a biomass aqueous solution; then adding the biomass aqueous solution in a high-pressure reactor; replacing air in the reactor by using inert gas or hydrogen; heating to the temperature of 200-300 DEG C; carrying out constant-temperature hydrothermal carbonization reaction under the condition of stirring; filtering or centrifugally separating a reaction product; extracting the liquid phase with ethyl acetate and then preparing the pesticide; and drying the solid phase and then preparing the organic fertilizers. Compared with the traditional method for preparing pesticide and organic fertilizers by using biological oil water-phase component sugar and sugar derivatives, the method has the advantages of low energy consumption, mild reaction conditions, simple technological process, easiness in separation of the reaction products, environmental friendliness and the like.

Description

technical field [0001] The invention belongs to the technical field of utilization of biomass resources, and in particular relates to a method for preparing pesticide in liquid phase and organic fertilizer in solid phase by hydrothermal carbonization of biomass. Background technique [0002] Citrus bagasse and bagasse are wastes of the food industry. They are cheap and have the advantages of large quantities, concentrated production areas, single components, no need for sorting, and controllable quality. Compared with other types of agricultural and forestry biomass resources, citrus bagasse and bagasse are good raw materials for the biomass refining industry. The present invention develops a new utilization process, adopts the method of hydrothermal carbonization, and does not use catalysts to prepare fertilizers and pesticides, which not only protects the environment, but also realizes the return of biomass waste to the field, increases the fertility of the soil, and overc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N43/08A01N27/00A01N31/08A01N35/06A01N35/04A01N35/02A01N37/02A01N37/42A01N31/14C05D9/00C10B53/02A01P1/00A01P3/00
CPCA01N27/00A01N31/08A01N31/14A01N35/02A01N35/04A01N35/06A01N37/02A01N37/42A01N43/08C05D9/00C10B53/02A01N2300/00Y02E50/10
Inventor 付严官懿余永龙叶振文张飞宏肖阳
Owner SOUTH CHINA UNIV OF TECH
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