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A kind of method for preparing slow-release fertilizer by lignocellulosic ethanol fermentation residue

A lignocellulose and ethanol fermentation technology, applied in the direction of calcium fertilizer, inorganic fertilizer, urea compound fertilizer, etc., can solve the problems of poor slow-release effect, secondary pollution of soil, complicated process, etc., and achieve the promotion of agricultural and forestry fertilization mode, The effect of increasing soil organic matter content and simple preparation method

Active Publication Date: 2019-09-13
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, slow-release fertilizers still have the disadvantages of complex process, high cost and poor slow-release effect. Although polymer-coated slow-release fertilizers have good slow-release effects, they are easy to cause secondary pollution to the soil, etc.

Method used

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  • A kind of method for preparing slow-release fertilizer by lignocellulosic ethanol fermentation residue
  • A kind of method for preparing slow-release fertilizer by lignocellulosic ethanol fermentation residue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Lignocellulosic ethanol fermentation residues are dried and pulverized, and passed through a 100-mesh sieve for later use. Take 20g of dried and pulverized lignocellulose ethanol fermentation residue into a 500mL three-neck flask, add 80mL of pure water for mixing, use NaOH solution to adjust the pH to 8.0, and place it in an ultrasonic cleaner for 6 hours.

[0045] In the three-neck flask containing the lignocellulose ethanol fermentation residue solution, 5 g of formaldehyde solution was slowly added dropwise, and mechanically stirred for 6 hours in a constant temperature water bath at 90°C.

[0046] Slowly add 10 g of polyvinyl alcohol (AH-26, alcoholysis degree: 98%) into 90 mL of pure water, stir rapidly while adding, and gradually raise the temperature from room temperature to 40°C.

[0047] The polyvinyl alcohol solution is slowly added dropwise to the lignocellulosic ethanol fermentation residue and formaldehyde solution, in a water bath at 90° C., and mechanica...

Embodiment 2

[0052]Lignocellulosic ethanol fermentation residues are dried and pulverized, and passed through a 100-mesh sieve for later use. Take 20g of dried and pulverized lignocellulose ethanol fermentation residue into a 500mL three-neck flask, add 80mL of pure water for mixing, use NaOH solution to adjust the pH to 8.0, and place it in an ultrasonic cleaner for 6 hours.

[0053] Add 5 g of acetic anhydride to a three-neck flask containing the solution of lignocellulosic ethanol fermentation residue, and mechanically stir for 6 h in a constant temperature water bath at 90°C.

[0054] Slowly add 10 g of polyvinyl alcohol (AH-26, alcoholysis degree: 98%) into 90 mL of pure water, stir rapidly while adding, and gradually raise the temperature from room temperature to 40°C.

[0055] The polyvinyl alcohol solution is slowly added dropwise to the lignocellulosic ethanol fermentation residue and formaldehyde solution, in a water bath at 90° C., and mechanically stirred for 10 hours to obtain...

Embodiment 3

[0060] Lignocellulosic ethanol fermentation residues are dried and pulverized, and passed through a 100-mesh sieve for later use. Take 20g of dried and pulverized lignocellulose ethanol fermentation residue into a 500mL three-neck flask, add 80mL of pure water for mixing, use NaOH solution to adjust the pH to 8.0, and place it in an ultrasonic cleaner for 6 hours.

[0061] In the three-neck flask containing the lignocellulose ethanol fermentation residue solution, 5 g of formaldehyde solution was slowly added dropwise, and mechanically stirred for 6 hours in a constant temperature water bath at 90°C.

[0062] Slowly add 10 g of polyvinyl alcohol (AH-26, alcoholysis degree: 98%) into 90 mL of pure water, stir rapidly while adding, and gradually raise the temperature from room temperature to 40°C.

[0063] The polyvinyl alcohol solution is slowly added dropwise to the lignocellulosic ethanol fermentation residue and formaldehyde solution, in a water bath at 90° C., and mechanica...

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Abstract

The invention discloses a method for preparing a slow-release fertilizer from lignocellulose ethanol fermentation residues. A completely novel slow-release fertilizer can be prepared by using the method, the lignocellulose ethanol fermentation residues are taken as a raw material for a first time, and the slow-release fertilizer which is good in slow-release effects and improved in soil properties can be prepared. The method is simple and feasible in process, components of the slow-release fertilizer can be all degraded, and the slow-release fertilizer is applicable to ecological fertilization of agriculture and forestry.

Description

technical field [0001] The invention belongs to the field of preparation of slow-release fertilizers, in particular to a method for preparing slow-release fertilizers from lignocellulose ethanol fermentation residues. Background technique [0002] Slow-release fertilizers, also known as long-acting fertilizers, mainly refer to fertilizers that transform into effective nutrients for plants after being applied to the soil at a slower rate than ordinary fertilizers. At present, there are mainly biochemical and physical methods for preparing slow-release fertilizers by adding biochemical inhibitors (such as urease inhibitors and nitrification inhibitors) to nitrogen fertilizers. Among the physical methods, the combination methods of additive materials and common fertilizers mainly include blending type, coating type and adsorption type. [0003] In the way of enhancing the slow release effect of fertilizers, coating is a very effective means. The coating material is a kind of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/08C05G3/04C05G3/00C05G3/80C05G3/90
CPCC05B7/00C05C9/00C05G3/00C05G3/80C05G3/90C05G5/30C05G5/37C05D3/00C05D9/00Y02P60/21
Inventor 陈介南张林闫豪王挥詹鹏刘进窦雪花
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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