A kind of production method of industrial grade ammonium dihydrogen phosphate co-production water-soluble fertilizer

A technology of high-grade ammonium dihydrogen phosphate and its production method, which is applied in the direction of ammonium orthophosphate fertilizer, alkaline orthophosphate fertilizer, phosphate fertilizer, etc., and can solve the problem of low direct utilization rate, poor material uniformity, useless industrial monoammonium phosphate, etc. question

Active Publication Date: 2020-11-20
GUIYANG KAILIN FERTILIZER CO LTD
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, there are similar studies in the United States, but there is no relevant report on the production of industrial monoammonium phosphate
In 2009, Yuntianhua International Chemical Co., Ltd. Zhuang Yanping and others conducted a pilot test on the production process of wet-process phosphoric acid, and finally developed a process for producing industrial-grade monoammonium phosphate by aging wet-process phosphoric acid, but there was no relevant report on industrialization
However, in this technological route, the direct utilization rate of phosphorus pentoxide and nitrogen is low, the average direct utilization rate of phosphorus pentoxide is lower than 60%, the average direct utilization rate of nitrogen is lower than 70%, and the direct utilization rate of phosphorus pentoxide is lower than 70%. Phosphorus and nitrogen are mostly used in the form of industrial monoammonium mother liquor for low-nutrient phosphate fertilizers and compound fertilizers as raw materials
[0004] At present, the production process of water-soluble fertilizer is relatively chaotic, and most of them are produced by physical blending of industrial-grade single nitrogen, phosphorus and potassium source raw materials. Mechanical blending of various materials leads to poor material uniformity and high production raw material costs.
Most of the production equipment is intermittent operation and simple and small, and the stability of product quality is not good

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
  • A kind of production method of industrial grade ammonium dihydrogen phosphate co-production water-soluble fertilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Embodiment 1: Industrial grade ammonium dihydrogen phosphate co-production water-soluble fertilizer production process:

[0050] 1. Production process of ammonium dihydrogen phosphate

[0051] 1.1. Mix wet-process phosphoric acid and phosphate rock powder as a desulfurizing agent evenly, and then enter the desulfurization reactor for desulfurization reaction. The desulfurization reaction temperature is 70°C, and the reaction time is 30 minutes. After the reaction, the desulfurized phosphoric acid slurry is sent to the push material Centrifugal separation in a screw centrifuge, the filtrate is sent to a neutralizer for neutralization reaction with liquid ammonia, the temperature of the first neutralization reaction is 70°C, and the pH value of the neutralization reaction slurry is 4;

[0052]1.2. After the neutralization reaction in step 1.1 is completed, the slurry is sent to a pusher screw centrifuge for centrifugation, and the centrifuged filtrate of the primary neutr...

Embodiment 2

[0058] Embodiment 2: Industrial grade ammonium dihydrogen phosphate co-production water-soluble fertilizer production process:

[0059] 1. Production process of ammonium dihydrogen phosphate

[0060] 1.1. Mix wet-process phosphoric acid and phosphate rock powder as a desulfurizing agent evenly, and then enter the desulfurization reactor for desulfurization reaction. The desulfurization reaction temperature is 85°C, and the reaction time is 40 minutes. After the reaction, the desulfurized phosphoric acid slurry is sent to the push material Centrifugal separation in a screw centrifuge, and the filtrate is sent to a primary neutralizer for neutralization reaction with liquid ammonia. The temperature of the primary neutralization reaction is 80°C, and the pH value of the neutralization reaction slurry is 4.3;

[0061] 1.2. After the neutralization reaction in step 1.1 is completed, the slurry is sent to a pusher screw centrifuge for centrifugation, and the centrifugal filtrate of ...

Embodiment 3

[0067] Embodiment 3: Industrial grade ammonium dihydrogen phosphate co-production water-soluble fertilizer production process:

[0068] 1. Production process of ammonium dihydrogen phosphate

[0069] 1.1. Mix wet-process phosphoric acid and phosphate rock powder as a desulfurizing agent evenly, and then enter the desulfurization reactor for desulfurization reaction. The desulfurization reaction temperature is 90°C, and the reaction time is 50 minutes. After the reaction, the desulfurized phosphoric acid slurry is sent to the push material Centrifugal separation in a screw centrifuge, the filtrate is sent to a neutralizer for neutralization reaction with liquid ammonia, the temperature of the first neutralization reaction is 90°C, and the pH value of the neutralization reaction slurry is 4.6;

[0070] 1.2. After the neutralization reaction in step 1.1 is completed, the slurry is sent to a pusher screw centrifuge for centrifugation, and the centrifugal filtrate of the primary ne...

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 industrial-grade ammonium dihydrogen phosphate and co-producing a water-soluble fertilizer. According to the present invention, based on the characteristics of the industrial monoammonium mother liquor, waste is turned into treasure; the method is used for producing the high-end fertilizer water-soluble fertilizer; and with the method, the high-end utilization rate of nutrients is increased, the added value of the product is increased, the benefits of the industrial-grade ammonium dihydrogen phosphate and water-soluble fertilizer coupled co-production device are maximized, and the coupled production of the industrial-grade ammonium dihydrogen phosphate and the water-soluble fertilizer is finally achieved.

Description

Technical field: [0001] The invention belongs to the technical field of agricultural fertilizers, and in particular relates to a production method of industrial-grade ammonium dihydrogen phosphate for co-production of water-soluble fertilizers. Background technique: [0002] According to the data of the National Agricultural Technology Extension Service Center of the Ministry of Agriculture, my country uses 6% of the world's water resources, 9% of the arable land and 30% of the chemical fertilizers. At the same time, it produces 26% of the agricultural products and feeds 18.84% of the global population. Huge, water shortage is more serious than land shortage. my country's irrigation water is about 3.6×1012m 3 / a, the gap is greater than 3.0 × 1011m3 / a, and the irrigation water production efficiency is 1kg / m 3 , which is only about 50% of that of the United States, Israel and other developed countries; the annual consumption of chemical fertilizers in my country exceeds 5400...

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): C01B25/28C05G1/00
CPCC01B25/28C05B7/00C05C3/00C05C5/02C05C9/00C05D1/00C05D9/00C05D9/02
Inventor 项双龙廖吉星徐圆刘琼潘礼富周勇李豪杰石磊
Owner GUIYANG KAILIN FERTILIZER CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap