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Environment-friendly multifunctional sustained-release fertilizer

An environmentally friendly, high-quality technology, applied in the chemical industry, can solve problems such as environmental pollution, economic loss of chemical fertilizers, and economic waste of resources.

Inactive Publication Date: 2015-06-10
QINGDAO WATER WORLD ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although chemical fertilizers have played an important role in supporting the growth of agricultural products for a long period of time, with the development of the chemical fertilizer industry and the increasing dependence of farmers on chemical fertilizers, the amount of fertilizer application has increased year by year, and the side effects caused by it have gradually increased. Appeared, forcing people to start to reflect on the disadvantages brought about by the extensive use of chemical fertilizers
First, high fertilization levels lead to low fertilizer use efficiency, resulting in serious waste of resources and economic losses
[0004] Excessive use of chemical fertilizers not only causes serious economic losses, but also brings environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0008] Prepare 0.1M copper sulfate solution and 0.1M potassium pyrophosphate solution respectively. Subsequently, under stirring conditions, the copper sulfate solution was slowly added dropwise to the potassium pyrophosphate solution at a rate of 1 mL / min until Cu 2+ with P 2 o 7 4- The molar ratio reaches 1:1. The reaction temperature was maintained at 25°C throughout the process. After 24 hours of aging, the precipitate in the reaction solution was filtered and washed with distilled water three times, and dried for later use.

[0009] A certain amount of SA was dissolved in 20mL distilled water, and placed in a three-necked flask equipped with a stirrer and an airway. Add 5g of partially neutralized AA, a certain amount of initiator APS and cross-linking agent NNMBA mixed solution into the SA solution drop by drop, and keep stirring. After flowing nitrogen for 15 minutes, the reactor was placed in a water bath at 75°C for 3 hours. After the reaction, the samples were...

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Abstract

The invention pertains to an environment-friendly multifunctional sustained-release fertilizer. The environment-friendly multifunctional sustained-release fertilizer is prepared from the following components in parts by mass: 40-90 parts of SA (sodium alginate), 20-70 parts of AA (acrylic acid), 30-90 parts of APS (ammonium persulfate), 70-120 parts of copper sulfate pentahydrate, 30-80 parts of potassium pyrophosphate trihydrate, 20-60 parts of urea and 60-90 parts of NNMBA (N,N-methylene bisacrylamide), wherein the viscosity of the 2% aqueous solution of SA at the temperature of 25 DEG C is 3,200mPa.s.

Description

technical field [0001] The invention belongs to an environment-friendly multifunctional slow-controlled release fertilizer and belongs to the technical field of chemical industry. Background technique [0002] Crop growth requires mineral nutrients, and sufficient nutrients must be provided in order to obtain high yields. Since the soil can only meet part of the needs of crops, additional nutrients must be added. Based on this theoretical understanding, the chemical fertilizer industry has risen, and at the same time, the world's agriculture has developed rapidly. In the past century, the world's population has grown rapidly, from 1.6 billion at the beginning of the last century to 6 billion at the end of the last century, and now it has reached 7 billion. Relying on the use of new food varieties, pesticides, irrigation, agricultural mechanization and other technologies, especially the application of chemical fertilizers, the global food production continues to increase, pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00
Inventor 孟素芬张森
Owner QINGDAO WATER WORLD ENVIRONMENTAL PROTECTION TECH
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