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

A kind of method of producing magnesium ammonium phosphate slow-release fertilizer

A slow-release fertilizer and magnesium ammonium phosphate technology, applied in fertilizer mixtures, fertilization devices, applications, etc., can solve the problems of difficult drying of materials, unqualified quality of agricultural grade monoammonium phosphate products, high drying energy consumption, etc., and achieve low production costs , Low raw material prices, significant economic benefits

Active Publication Date: 2015-12-30
昆明隆祥化工有限公司
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the filter cake is slurried and dried to produce agricultural grade monoammonium phosphate products, there are the following problems: due to the high viscosity of the filter cake material, high moisture content, and low drying softening point, the drying of the material It is very difficult, and at the same time, the drying energy consumption is high. The traditional rotary kiln, air drying, fluidized bed and other equipment cannot process the filter cake. It can only be completed by spray drying equipment or low-temperature rotary flash evaporation with high energy consumption, resulting in The production cost of this link has increased sharply
Otherwise, excessive filter cake will lead to unqualified quality of agricultural grade monoammonium phosphate, which is also the main reason why the scale of wet industrial grade monoammonium phosphate is not large at present

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A, take the ammoniated slurry filter cake produced in the process of producing industrial-grade monoammonium phosphate with wet-process phosphoric acid as described in patent CN102020256B (wherein: total P 2 o 5 23.94%; water-soluble P 2 o 5 13.87%; MgO0.82%; N4.30%;) 100 kg, put it in a stirrer, add 10.5 kg of lightly burned magnesium oxide powder (containing MgO75.40%), and stir at a stirring speed of 30 rpm React for 2 minutes to obtain the reaction material;

[0022] B. Release the material obtained in step A, let it stand and mature for 1 day, make it react completely, and solidify into a loose block.

[0023] C, after drying and crushing the material matured in step B, 66.8 kilograms of magnesium ammonium phosphate slow-release fertilizer products (wherein: effective P 2 o 5 34.73%; MgO12.74%; N6.08%).

Embodiment 2

[0025] A, take the ammoniated slurry filter cake produced in the process of producing industrial-grade monoammonium phosphate with wet-process phosphoric acid as described in patent CN102020256B (wherein: total P 2 o 5 23.94%; water-soluble P 2 o 5 13.87%; MgO0.82%; N4.30%;) 100 kg, put it in a stirrer, add 14.6 kg of lightly burned magnesium oxide powder (containing MgO75.40%), and stir at a stirring speed of 40 rpm React for 3 minutes to obtain the reaction material;

[0026] B. Release the material obtained in step A, let it stand and mature for 1 day, make it react completely, and solidify into a loose block.

[0027] C. After drying and crushing the material matured in step B, 69.6 kilograms of magnesium ammonium phosphate slow-release fertilizer products (wherein: effective P 2 o 5 33.30%; MgO16.66%; N5.70%).

Embodiment 3

[0029] A, get 100 kilograms of ammoniated slurry filter cakes produced in the process of producing industrial grade monoammonium phosphate with wet-process phosphoric acid described in CN102020256B, in this filter cake: P 2 o 5 23.94%; water-soluble P 2 o 5　 13.87%; MgO0.82%; N4.30%; 2 o 5 20.38; N8.49; MgO0.25% CN102020256B described in CN102020256B using wet-process phosphoric acid to produce industrial-grade monoammonium phosphate 10 kg of crystallization mother liquor produced in the process, to obtain a mixed slurry with a liquid content of 66% by mass , then add 12 kilograms of lightly burned magnesia powder (containing MgO75.40%) in the mixed slurry, under the high-speed stirring condition of 960 revs / min at the stirring speed, stir and react for 12 seconds to obtain the mixed material;

[0030] B. Release the mixed material obtained in step A, let it stand and mature for 2 days, make it react completely, and solidify into a loose block;

[0031] C, after routinely...

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

No PUM Login to View More

Abstract

The invention provides a method for producing magnesium ammonium phosphate controlled-release fertilizer by utilizing an ammoniated slurry filtration filter cake produced in a process of producing industrial-grade monoammonium phosphate by adopting wet process phosphoric acid. The filter cake reacts with light calcined magnesia powder to generate the magnesium ammonium phosphate controlled-release fertilizer with magnesium ammonium phosphate as a main active ingredient. The method for producing the magnesium ammonium phosphate controlled release fertilizer product is simple, the magnesium ammonium phosphate controlled release fertilizer can be easily dried, and fertilizer efficiency is high.

Description

technical field [0001] The invention relates to a production method of magnesium ammonium phosphate slow-release fertilizer, in particular to a method for producing ammonium magnesium phosphate slow-release fertilizer by using ammoniated slurry filter cake produced in the process of producing industrial-grade monoammonium phosphate with wet-process phosphoric acid The method belongs to the field of chemical technology. Background technique [0002] The production of industrial grade monoammonium phosphate by wet-process phosphoric acid has become a realistic and effective production method. In the CN102020256B invention patent and other similar wet phosphoric acid ammonification processes, complex precipitates containing various complex components will be formed, and a paste filter cake will be formed after filtration and separation. The paste filter cake contains a large amount of phosphoric acid as the main component. The liquid phase of monoammonium. When the filter cak...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C05G1/00
Inventor 马健李庆
Owner 昆明隆祥化工有限公司
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