Functional sustained or controlled release fertilizer core based on bio-based adhesive and preparation method thereof

A technology of slow and controlled release fertilizers and binders, applied in nitrogen fertilizers, potassium fertilizers, phosphate fertilizers, etc., can solve the problems of unsustainable development, poor cohesiveness, environmental pollution, etc., and achieve improved fluidization performance, strong cohesiveness, and particle size strong effect

Active Publication Date: 2018-09-11
SHANDONG AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It solves the problems of poor adhesion, environmental pollution and unsustainable development of traditional binders, and greatly improves the versatility of slow-release fertilizers

Method used

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  • Functional sustained or controlled release fertilizer core based on bio-based adhesive and preparation method thereof
  • Functional sustained or controlled release fertilizer core based on bio-based adhesive and preparation method thereof
  • Functional sustained or controlled release fertilizer core based on bio-based adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Embodiment 1: the preparation of bio-based binder

[0049] Weigh 70g of lignin, 25g of phenol and 4.6g of transition metal coordination complex catalyst and mix them evenly, then put them into the reactor, set the temperature of the reactor at 150°C, and react for 2h to obtain the lignin bio-based polyol; take 45g The obtained lignin bio-based polyol was reacted with 0.2g of bisphenol A glyceryl diacrylate, 0.2g of 3-aminopropyltrimethoxysilane, and 50g of vinyltriamine at 60°C for 1h to prepare a bio-based binder .

Embodiment 2

[0050] Embodiment 2: the preparation of bio-based binder

[0051] Weigh 70g of tannin, 25g of ethylene glycol and 4.6g of sulfuric acid catalyst and mix them evenly and put them into the reactor; set the temperature of the reactor to 150°C and react for 2h to obtain tannin bio-based polyol; take 45g of the obtained tannin bio base polyol with 0.1 g 3,5 dimethylthio-2,4-diaminotoluene (DMTDA), 0.1 g carboxy-functionalized castor oil (CCE) and 0.1 g hexamethoxymethylcyanuric acid (HMMM) , 0.1g of trimethylolethane, and 50g of vinyltriamine were mixed, and reacted at 100°C for 0.5h to prepare a bio-based binder.

Embodiment 3

[0052] Example 3: Preparation of functional slow-release fertilizer core

[0053] Sieve powdered urea, monoammonium phosphate, potassium chloride and fulvic acid, the fineness of the sieve is 60 mesh, weigh 1.8kg powdered urea, 1.6kg monoammonium phosphate, 1.6kg potassium chloride and 25g Mix the fulvic acid evenly, add it to the heat preservation disc granulator preheated to 50°C; spray 100g of the bio-based binder prepared in Example 1 on the mixed fertilizer under positive pressure, granulate, and sieve the granules 3-5mm diameter granules; dry the sieved 3-5mm granules to obtain a functional slow-release fertilizer core.

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Abstract

The invention discloses a functional sustained or controlled release fertilizer core based on a bio-based adhesive and a preparation method thereof. The bio-based adhesive is prepared through the steps that a biomass material is subjected to a liquidation reaction, bio-based polyalcohol is prepared, and the bio-based polyalcohol, a chain extender, a cross-linking agent and a curing agent are pre-mixed. The bio-based adhesive is prepared from regenerative biomass resources, dependence on petrification-based raw materials is reduced, good degradability is achieved, and meanwhile the bio-based adhesive is high in adhesive performance, good in heat resistance, high in water resistance, easy to spray and easy to dry. The functional sustained or controlled release fertilizer core prepared basedon the bio-based adhesive is high in granulation rate, large in particle strength, excellent in moisture absorption resistance, high in impact resistance, good in roundness, good in storage and transport performance and especially suitable for a coated sustained or controlled release fertilizer production process, the material fluidifying performance can be improved, the specific area of the fertilizer core is reduced, and the coating cost of controlled-release fertilizer is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of slow and controlled release fertilizers, in particular to a bio-based binder-based functional slow and controlled release fertilizer core and a preparation method thereof. Background technique [0002] Chemical fertilizers are important means of production in agricultural production to ensure increased yields. With the increase of human food demand, the amount of chemical fertilizers is also increasing. According to statistics from the Food and Agriculture Organization of the United Nations, chemical fertilizers account for 40%-60% of the effect of increasing crop yields. my country's chemical fertilizer consumption accounts for about 30% of the world's total chemical fertilizer consumption, ranking first in the world, but the average seasonal utilization rate of chemical fertilizers in my country is only 30-35%, which not only causes a huge waste of resources, but also creates a huge waste of resources f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G5/00
CPCC05B7/00C05G5/12C05C9/00C05D1/02C05F11/02C05G3/00
Inventor 张民李泽丽刘之广贾春花赵洪猛田虹雨
Owner SHANDONG AGRICULTURAL UNIVERSITY
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