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High molecular slow-release boric fertilizer and preparation method thereof

A polymer, slow-release technology, applied in fertilization devices, fertilizer mixtures, applications, etc., can solve the problem of no polymer slow-release boron fertilizer, etc., and achieve the effect of improving the effective utilization rate and improving the utilization rate.

Active Publication Date: 2010-06-16
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that there is no polymer slow-release boron fertilizer at present, the present invention provides a polymer slow-release boron fertilizer and a preparation method thereof

Method used

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  • High molecular slow-release boric fertilizer and preparation method thereof
  • High molecular slow-release boric fertilizer and preparation method thereof
  • High molecular slow-release boric fertilizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Polymer slow-release boron fertilizer is a compound with the following general formula:

[0035]

[0036] In the formula: m=1-10, n=0-5, x=5-10.

[0037] In this embodiment, m=1, n=0, x=5, the mass percentage of boron in the molecule is 5.3wt%, the mass percentage of nitrogen is 27.2wt%, and the potassium content is represented by K 2 The mass percentage of O is expressed, and K 2 The mass percent content of O is 22.8wt%. The molecular weight is 1000, and the total nutrient content is 55.3%.

[0038] For specific preparation, add 6.2kg of boric acid and 5.6kg of potassium hydroxide to a 40-liter stainless steel reactor, and heat to 80-100°C (80°C or 85°C or 90°C or 95°C or 100°C) to generate boric acid dihydrogen Potassium, then add 12kg of urea, control the reaction temperature to 110°C ~ 140°C (110°C or 120°C or 130°C or 140°C), keep the reactant in a molten state, then add 2.4kg of formaldehyde, continue to proceed under this condition Polycondensation reactio...

Embodiment 2

[0040] Polymer slow-release boron fertilizer is a compound with the following general formula:

[0041]

[0042] In the formula: m=1-10, n=0-5, x=5-10.

[0043] In this embodiment, when m=1, n=5, and x=10, the mass percentage of boron in the molecule is 1.1 wt%, the mass percentage of nitrogen is 22.7 wt%, and the potassium content is expressed in K 2 The mass percentage of O is expressed, and K 2 The mass percentage of O is 28.2wt%, and the phosphorus content is represented by P 2 o 5 The mass percentage content expressed, P 2 o 5 The mass percentage content of is 35.5wt%. The molecular weight is 10000, and the total nutrient content is 87.5%.

[0044] For specific preparation, add 0.93kg of boric acid and 1.04kg of potassium carbonate to a 40-liter stainless steel reactor, and heat to 80-100°C (80°C or 85°C or 90°C or 95°C or 100°C) to generate potassium dihydrogen borate , then add 10.2kg of potassium dihydrogen phosphate and 10.8kg of urea, control the reaction tem...

Embodiment 3

[0046] Polymer slow-release boron fertilizer is a compound with the following general formula:

[0047]

[0048] In the formula: m=1-10, n=0-5, x=5-10.

[0049] In this embodiment, m=10, n=0, x=10, the mass percentage of boron in the molecule is 8.3wt%, the mass percentage of nitrogen is 23.6wt%, and the potassium content is represented by K 2 The mass percentage of O is expressed, and K 2 The mass percent content of O is 35.7wt%, the molecular weight is 13160, and the total nutrient content is 67.6%.

[0050] For specific preparation, add 7.5kg of boric acid and 6.7kg of potassium hydroxide to a 40-liter stainless steel reactor, and heat it to 80-100°C (80°C or 85°C or 90°C or 95°C or 100°C) to generate boric acid dihydrogen Potassium, then add 8 kg of urea, control the reaction temperature to 110 ° C ~ 140 ° C (110 ° C or 120 ° C or 130 ° C or 140 ° C), keep the reactant in a molten state, then add 0.32 kg of formaldehyde, continue polycondensation under this condition ...

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Abstract

The invention relates to slow-release fertilizer, in particular to high molecular slow-release boric fertilizer and a preparation method thereof. The invention solves the problem that the high molecular slow-release boric fertilizer does not exist at present. The high molecular slow-release boric fertilizer is a compound with the following general formula: in the formula, m is 1-10, n is 0-5, and x is 5-10. The preparation method of the high molecular slow-release boric fertilizer comprises the following steps: generating potassium dihydrobis borate by boric acid, potassium hydroxide or potassium carbonate, then adding urea, controlling the reaction temperature to 110-140 DEG C, enabling a reactant to be kept in a molten state, afterwards adding formaldehyde, carrying out a polycondensation reaction continuously under this condition, stopping the reaction until the viscosity of the system reaches the granulating requirement and then granulating a polycondensation reaction product in a molten state. The high molecular slow-release boric fertilizer can be independently used as special paddy fertilizer, or is mixed with farmyard manure for use, or is applied as the slow-release fertilizer of crops which especially require the replenishment of the boron element.

Description

technical field [0001] The invention relates to a slow-release fertilizer, in particular to a polymer slow-release boron fertilizer and a preparation method thereof. Background technique [0002] Rice is one of the important food crops in my country, and the current output per unit area has reached more than 800Kg / mu. However, rice is different from other crops. In addition to the usual three elements of nitrogen, phosphorus and potassium, its growth and development also requires an appropriate amount of boron. In order to obtain fertilizers that contain all four elements of nitrogen, phosphorus, potassium, and boron, the prior art all adopts a compounding method, such as: compounding urea, potassium dihydrogen phosphate and boric acid or borate. In compound fertilizers, urea, potassium dihydrogen phosphate and borate are water-soluble substances with small molecules, which are prone to leaching and loss, resulting in environmental pollution of eutrophication of water bodie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05D9/02
Inventor 刘亚青赵贵哲孙友谊王燕杜瑞奎曹杨朱福田
Owner ZHONGBEI UNIV
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