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Manufacturing method of urban energy-saving and environmental-friendly cultivation medium

A cultivation substrate, energy-saving and environment-friendly technology, applied in cultivation, soilless cultivation, botany equipment and methods, etc., to achieve good water retention performance and improve water conditions

Inactive Publication Date: 2011-06-22
天津市津鸥化肥有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are many studies on urea-formaldehyde foam at home and abroad, but they mainly focus on industrial applications, and there are few reports on agricultural applications.

Method used

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  • Manufacturing method of urban energy-saving and environmental-friendly cultivation medium
  • Manufacturing method of urban energy-saving and environmental-friendly cultivation medium
  • Manufacturing method of urban energy-saving and environmental-friendly cultivation medium

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Embodiment Construction

[0025] Below in conjunction with the accompanying drawings and preferred embodiments, the specific implementation methods and features provided according to the present invention are described in detail as follows:

[0026] A method for manufacturing an urban energy-saving and environment-friendly cultivation substrate is characterized in that the implementation steps are as follows:

[0027] The first stage is an addition reaction, that is, urea and formaldehyde undergo a methylolation reaction in a neutral or alkaline medium with a pH of 7 to 8. The reaction process is as follows:

[0028] That is, a hydroxymethyl urea;

[0029] That is, dimethylolurea;

[0030] When the molar ratio (F / U) of formaldehyde to urea is large, the further reaction generates trimethylolurea and tetramethylolurea;

[0031] The second stage is the polycondensation reaction. Under the condition of weakly acidic pH=4~6, various methylol ureas are condensed to form a hydrophilic resin. The struct...

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Abstract

The invention relates to a manufacturing method of an urban energy-saving and environmental-friendly cultivation medium, which comprises the following implementation steps: in the first phase of an addition reaction, urea and formaldehyde are allowed to perform a hydroxymethylation reaction in a medium with a neutral or slightly alkaline pH of 7-8 to obtain monomethylol urea and dimethylol urea; further reaction is performed to obtain trimethylol urea and tetramethylol urea when the molar ratio of formaldehyde and urea (F / U) is higher; in the second phase of a polycondensation reaction, various methylol ureas are allowed to perform condensation in a weak acid condition with a pH of 4-6 to obtain a hydrophilic resin, wherein in the molecular structure, the hydroxymethyl group and the hydrogen connected to the nitrogen have a polycondensation capability; with the progress of the above reaction, the molecular weight increases gradually, and the molecular state becomes more complex, and even a network structure is formed, so the resin becomes an elastomer with a stereo configuration. The invention uses urea formaldehyde foam plastics as a novel plant cultivation medium to substitute soil, is environmental-friendly and can effectively save resources.

Description

technical field [0001] The invention relates to a method for manufacturing artificial soil, in particular to a method for manufacturing an urban energy-saving and environment-friendly cultivation substrate. Background technique [0002] As early as the 1960s, British scientists found that the foam layer synthesized by urea-formaldehyde and melamine resin foam was laid below the ground surface to improve the soil. Fertilizer, peat, humus, seeds and plant roots can be added to the foam to form a mixture. . There are many studies on urea-formaldehyde foam at home and abroad, but they mainly focus on industrial applications, and there are few reports on agricultural applications. [0003] Therefore, it is one of the problems that those skilled in the art should start to solve to provide an easy-to-implement and effective urban energy-saving and environment-friendly cultivation substrate manufacturing method. Contents of the invention [0004] The object of the present invent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/24C08J9/30C08G12/12A01G31/00
Inventor 田文海
Owner 天津市津鸥化肥有限责任公司
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