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

A method for producing superphosphate by using industrial waste mixed acid

A technology of superphosphate and waste mixed acid, applied in the directions of superphosphate, separation method, combustion method, etc., can solve the problems that large-scale production can not be carried out normally, can not completely eliminate tail gas odor, tail gas odor residue, etc. Significant economic and environmental benefits, expanding utilization channels, and low-cost effects

Active Publication Date: 2020-03-27
贵州昊华工程技术有限公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the complex harmful components in the purification of waste acetylene sulfuric acid, only the absorption, washing and deodorization of waste gas cannot completely eliminate the odor in the tail gas. In the actual production process, the tail gas has a serious impact on the surrounding environment, so that large-scale production cannot be carried out normally. It can be seen that this treatment method is not suitable for the use of waste sulfuric acid for the purification of acetylene to prepare superphosphate. Exhaust gas treatment
[0007] In summary, there is currently no report on the use of two waste mixed acids to prepare calcium superphosphate at the same time, let alone the use of a combination of purified acetylene waste sulfuric acid / etching waste phosphoric acid to prepare calcium superphosphate; In the reality that high-quality phosphate rock resources are depleting day by day and the cost of beneficiation is getting higher and higher, improving the utilization rate of medium and low-grade phosphate rock has become an urgent technical problem to be solved in the application of phosphorus resources

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 method for producing superphosphate by using industrial waste mixed acid
  • A method for producing superphosphate by using industrial waste mixed acid
  • A method for producing superphosphate by using industrial waste mixed acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A method for producing superphosphate by using industrial waste mixed acid, the reaction material is calculated by: waste phosphoric acid P 2 o 5 =45.7%, waste sulfuric acid content=85%, X=20%, mixed acid dosage is 100%, mixed acid concentration is 62%, including the following steps:

[0045] (1) First turn on the mixer, mixing reactor and the exhaust fan in the chemical formation room, then add 10kg of No. 1 phosphate rock powder, 1.9kg of water and 3.37kg of etching waste phosphoric acid into the mixer and mix them at 52°C Stir and react for 5 minutes to prepare a mixed slurry, and simultaneously use an exhaust fan to introduce waste gas into the waste gas treatment system, and the concentration of the used etching waste phosphoric acid is P 2 o 5 =45.7%; The main chemical composition of No. 1 phosphate rock powder used is as shown in Table 1;

[0046] (2) Slowly add the above mixed slurry, 5.0kg of 85% waste sulfuric acid and 0.15kg of 65% concentrated nitric acid...

Embodiment 2

[0051] A method for producing superphosphate by using industrial waste mixed acid, the reaction material is calculated by: waste phosphoric acid P 2 o 5 =45.7%, waste sulfuric acid content=85%, X=30%, mixed acid dosage is 100%, mixed acid concentration is 64%, including the following steps:

[0052] (1) First turn on the mixer, mixing reactor and the exhaust fan in the chemical formation room, then add 10kg of No. 1 phosphate rock powder, 1.18kg of water and 7.56kg of etching waste phosphoric acid into the mixer, stir and mix them, and heat them at 58°C Mixed slurry was prepared by stirring and reacting for 6min, and the concentration of the used etching waste phosphoric acid was P 2 o 5 =45.7%, and the waste gas is introduced into the waste gas treatment system with an exhaust fan at the same time; the main chemical composition of the No. 1 phosphate rock powder used is shown in Table 1;

[0053] (2) Slowly add the above mixed slurry together with 4.37kg of 85% waste sulfu...

Embodiment 3

[0058] A method for producing superphosphate by using industrial waste mixed acid, the reaction material is calculated by: waste phosphoric acid P 2 o 5 =38.7%, waste sulfuric acid content=85%, X=20%, mixed acid dosage is 100%, mixed acid concentration is 61%, including the following steps:

[0059] (1) First turn on the mixer, mixing reactor and the exhaust fan in the chemical formation room, then add 10kg of No. 2 phosphate rock powder, 1.0kg of water and 7.0kg of waste phosphoric acid into the mixer and stir at 53°C React 8min to make mixed slurry, P in the waste phosphoric acid used 2 o 5 Content is 38.7%; The main chemical composition of used No. 2 phosphate rock powder is as shown in table 1;

[0060] (2) Slowly add the above mixed slurry together with 5.2kg of 85% waste sulfuric acid and 0.18kg of 65% concentrated nitric acid into the mixing reactor and stir, and stir and react at 93°C for 7 minutes to obtain the slurry. Harmful substances are oxidized, decomposed a...

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 discloses a method for producing calcium superphosphate by using industrial waste mixed acid, which comprises the steps of metering, preparation of mixed slurry, chemical formation and aging, granulation, drying, screening, packaging and the like. This application provides a phosphorus source by adding a certain amount of waste phosphoric acid when using waste sulfuric acid to decompose phosphate rock, and successfully realizes the preparation of phosphate fertilizer with relatively high superphosphate content from medium-grade phosphate rock. At the same time, waste acid can produce phosphate fertilizer products with certain competitiveness, which expands the utilization rate of phosphate rock resources, creates economic value, realizes the creation of economic benefits and reduces environmental impact; and the waste gas produced is absorbed, washed, deodorized, incinerated, Dust removal and multi-process treatment, tail gas emissions meet national standards, and the production process fully meets the conditions for production transformation. It can be converted from the existing ordinary calcium production line. The production investment is small, the process is simple, the cost is low, and the economic and environmental benefits are significant.

Description

technical field [0001] The invention belongs to the technical field of waste acid treatment, and in particular relates to a method for producing superphosphate by using industrial waste mixed acid. Background technique [0002] Waste sulfuric acid for purification of acetylene is the waste acid (w=80-90%) produced by refining and purifying acetylene in the production process of chemical raw material acetylene, which is black and sticky, containing phosphine, hydrogen sulfide and various organic and inorganic Hazardous substances have a foul smell, and their output is huge, which has a serious impact on the environment; etching waste phosphoric acid is a phosphoric acid-containing waste liquid produced during wet etching and pickling in the photoelectric industry, which is highly corrosive and is a hazardous waste. With the rapid development of the semiconductor industry, the output of etching waste phosphoric acid is increasing day by day. Unreasonable recycling and disposal...

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): C05B1/02B01D53/75B01D50/00F23G7/06
CPCB01D53/75F23G7/06C05B1/02B01D50/10
Inventor 朱通燃张延顺梁华英李洁聂燕春游龙江
Owner 贵州昊华工程技术有限公司
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