Unlock instant, AI-driven research and patent intelligence for your innovation.

Process method for producing ammonium dihydrogen phosphate by using waste phosphoric acid

A technology of ammonium dihydrogen phosphate and process method, which is applied in the field of waste phosphoric acid to produce ammonium dihydrogen phosphate, can solve the problems of high raw material cost, complex process, environmental pollution, etc., and achieve the effect of cost saving and simple process flow

Inactive Publication Date: 2019-01-29
嘉兴市环科环保新材料科技有限公司
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The raw material cost of the existing ammonium dihydrogen phosphate preparation is high, the process is complicated, and a large amount of waste water and waste gas are easily generated during the production process, which is easy to pollute the environment

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
  • Process method for producing ammonium dihydrogen phosphate by using waste phosphoric acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A process method for generating ammonium dihydrogen phosphate from waste phosphoric acid, the process method includes the following steps: (1) Neutralization and pH adjustment: use a mixing pump to pump waste phosphoric acid into the mixing tank, and then feed liquid ammonia (Zhejiang Xinhua Chemical Co., Ltd.), enter the evaporator and ammonia buffer tank through the pipeline, become ammonia gas, and carry out neutralization reaction. The reaction temperature of the neutralization reaction is 100 ° C, and the reaction time is 8 hours. Adjust the pH of the solution value and specific gravity until clear liquid is obtained;

[0020] (2) Concentration: Add the clear liquid to the concentration tank with a clear liquid pump for concentration, the concentration temperature is 85°C, the pressure is -0.06Mpa, the jacket pressure is 0.4Mpa, and the concentration is 3 hours;

[0021] (3) Cooling and crystallization: After the solution is concentrated, it is cooled to about 45°C...

Embodiment 2

[0025] A process method for generating ammonium dihydrogen phosphate from waste phosphoric acid, the process method includes the following steps: (1) Neutralization and pH adjustment: use a mixing pump to drive waste phosphoric acid into the mixing tank, and then open the ammonia water storage tank The valve is configured by feeding ammonia water through the pipeline to carry out the neutralization reaction. The reaction temperature of the neutralization reaction is 100°C, and the reaction time is 8 hours. Adjust the pH value and specific gravity of the solution until the clear liquid is obtained;

[0026] (2) Concentration: Add the clear liquid to the concentration tank with a clear liquid pump for concentration, the concentration temperature is 85°C, the pressure is -0.06Mpa, the jacket pressure is 0.4Mpa, and the concentration is 3 hours;

[0027] (3) Cooling and crystallization: After the solution is concentrated, it is cooled to about 45°C by cooling water, and cooled for ...

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

Provided is a process method for producing ammonium dihydrogen phosphate by using waste phosphoric acid. Waste phosphoric acid is adopted as a raw material for producing ammonium dihydrogen phosphate,and cost saving and full utilization of waste can be achieved. The process has simple process procedures, water vapor and ammonia gas produced throughout the production process are discharged throughupper air, and generated evaporation condensed water is introduced into a sewage treatment station as wastewater for treatment; and exhaust gas volatilized on the surface of a neutralization tank isabsorbed by an acid liquid of a scrubber tower under the action of an induced draft fan, ammonia gas is removed by circulating water, and the water vapor is discharged after cyclone dust removal is conducted, so that no pollution is caused to the environment.

Description

technical field [0001] The invention relates to the technical field of ammonium dihydrogen phosphate preparation, in particular to a process for producing ammonium dihydrogen phosphate from waste phosphoric acid. Background technique [0002] In the process of industrial production, enterprises discharge a large amount of liquid waste and solid waste every day. These wastes are directly discharged, which not only pollutes the environment, but also wastes a lot of resources. For this reason, how to carry out selective and comprehensive recycling of these wastes to realize "turning waste into treasure" is increasingly attracting the attention of the whole society. [0003] The raw material cost of the existing ammonium dihydrogen phosphate preparation is high, the process is complicated, and a large amount of waste water and waste gas are likely to be generated during the production process, which is easy to cause pollution to the environment. Contents of the invention [...

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 Applications(China)
IPC IPC(8): C01B25/28
CPCC01B25/28
Inventor 金月祥
Owner 嘉兴市环科环保新材料科技有限公司