Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Nanometer apatite phosphate fertilizer and preparation method thereof

An apatite and nanotechnology, which is applied in the field of nano-apatite phosphate fertilizer and its preparation, can solve the problems of not being able to realize and reduce soil fixation well at the same time, and achieve the effect of reducing the fixation of soil to phosphorus

Inactive Publication Date: 2011-02-16
NANJING NORMAL UNIVERSITY
View PDF5 Cites 27 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, the long-acting slow-acting phosphate fertilizers produced by these two types of methods cannot effectively reduce the fixation of phosphorus in the soil and effectively prevent the transfer of phosphorus to water bodies at the same time.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Nanometer apatite phosphate fertilizer and preparation method thereof
  • Nanometer apatite phosphate fertilizer and preparation method thereof
  • Nanometer apatite phosphate fertilizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Prepare 0.835 mol / L Ca(NO 3 ) 2 and 0.5 mol / L (NH 4 ) 2 HPO 4 solution, the pH value is adjusted to 11 with 0.1-1 mol / L ammonia water, and the molar ratio of Ca and P is 1.67, and (NH 4 ) 2 HPO 4 The solution was slowly added dropwise to the Ca(NO 3 ) 2 The solution was stirred with a magnetic stirrer at the same time, and the obtained precipitate was transferred to a tripod flask. After shaking in a horizontal shaker for 12 h, the sample was dried at 110 °C, and finally ground with an agate mortar.

[0039] The nano-apatite phosphate fertilizer that makes, its X-ray diffractogram and transmission electron microscope photograph are respectively as follows figure 1 and figure 2 shown. Depend on figure 1 It can be seen that the nano-apatite phosphate fertilizer has broad diffraction peaks at 2θ values ​​of 26°, 32°, 34°, 40°, 47° and 50° on the X-ray diffraction pattern. Depend on figure 2 It can be seen that the nano-apatite phosphate fertilizer includes n...

Embodiment 2

[0042] Prepare 1.67 mol / L Ca(NO 3 ) 2and 1 mol / L (NH 4 ) 2 HPO 4 solution, the pH value is adjusted to 11 with 0.1-1 mol / L ammonia water, and the molar ratio of Ca and P is 1.67, and (NH 4 ) 2 HPO 4 The solution was slowly added dropwise to the Ca(NO 3 ) 2 The solution was stirred with a magnetic stirrer at the same time, and the obtained precipitate was transferred to a tripod flask. After shaking in a horizontal shaker for 12 h, the sample was dried at 110 °C, and finally ground with an agate mortar.

Embodiment 3

[0044] Prepare 0.835 mol / L Ca(NO 3 ) 2 and 0.5 mol / L Ca(H 2 PO 4 ) 2 solution, the pH value is adjusted to 11 with 0.1-1 mol / L ammonia water, and the molar ratio of Ca and P is 1.67, and Ca(H 2 PO 4 ) 2 The solution was slowly added dropwise to the Ca(NO 3 ) 2 The solution was stirred with a magnetic stirrer at the same time, and the obtained precipitate was transferred to a tripod flask. After shaking in a horizontal shaker for 12 h, the sample was dried at 110 °C, and finally ground with an agate mortar.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
The average particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a nanometer apatite phosphate fertilizer and a preparation method thereof. The nanometer apatite phosphate fertilizer is prepared by the steps of carrying out precipitation reaction or hydro-thermal reaction on a phosphorus base solution and a calcium base solution. The nanometer apatite phosphate fertilizer comprises 33.2-100 percent by weight of nanometer hydroxylapatite with the average grain diameter of 20-50 nanometers. The solid nanometer apatite phosphate fertilizer can not cause aquatic environment pollution by running off with rain water after being fertilized into soil and can obviously increase the content of rapidly available phosphorus contained in the soil in a short time, effectively reduce the fixation of the soil on the rapidly available phosphorus and keep the content of the rapidly available phosphorus contained in the soil at an appropriate (20-40 mg / kg) level and an abundant (more than 40 mg / kg) level for a long time; in addition, the nanometer apatite phosphate fertilizer does not have bad soil ecological effect and can realize the in-situ inactivation of pollutants if fertilized into soil polluted by the pollutants, such as heavy metals and the like.

Description

technical field [0001] The invention belongs to the technical field of chemical fertilizer production, and relates to a phosphate fertilizer and a preparation method thereof, in particular to a nano-apatite phosphate fertilizer and a preparation method thereof. Background technique [0002] Phosphorus (P) is a macronutrient element necessary for the growth and development of crops, and phosphorus is a limiting factor for crop growth in some crop production areas in my country. Rational application and use of phosphorus fertilizers is an important factor to improve crop yield and quality and ensure agricultural production benefits. There are two problems in the application process of quick-acting phosphate fertilizers. On the one hand, this water-soluble phosphate fertilizer will enter the groundwater and water bodies, causing or aggravating eutrophication of water bodies and polluting the environment; After the quick-acting phosphate fertilizer is applied to the soil, it wi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C05B17/00
Inventor 魏正贵王瑜何春建魏巍崔静
Owner NANJING NORMAL UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com