Check patentability & draft patents in minutes with Patsnap Eureka AI!

Phosphorus-containing desulfurized gypsum recycling treatment method

A technology of desulfurization gypsum and treatment method, which is applied in the direction of chemical instruments and methods, single crystal growth, polycrystalline material growth, etc. It can solve the problems that desulfurization gypsum cannot perform well, restricts the application of engineering raw materials, and has a dark yellow color. Achieve the effect of realizing sustainable development, promoting development, and simple methods

Pending Publication Date: 2021-05-07
HAINAN LANDAO ENVIRONMENTAL PROTECTION IND
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, desulfurized gypsum contains a lot of impurities, and the color is dark yellow (see attached figure 1 ), showing irregular granular shape (see attached figure 2 ), phosphogypsum (see attached image 3 ) makes desulfurization gypsum unable to play its performance well in reuse, which limits its application as engineering raw material

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
  • Phosphorus-containing desulfurized gypsum recycling treatment method
  • Phosphorus-containing desulfurized gypsum recycling treatment method
  • Phosphorus-containing desulfurized gypsum recycling treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 2. A method for reusing phosphorus-containing desulfurized gypsum, comprising a method for removing impurities from phosphorus-containing desulfurized gypsum and a method for preparing calcium sulfate hemihydrate whiskers;

[0031] The method for removing impurities from phosphorus-containing desulfurized gypsum comprises the following steps:

[0032] S1, the phosphorus-containing detached gypsum is dried in an oven and crushed into powder,

[0033] S2. Configure 100ml of 3mol / L hydrochloric acid solution in a beaker, place it in an oil bath at 95°C and stir for 5 minutes, then add 10g of phosphorus-containing desulfurized gypsum, add 80ml of 0.9mol / L sodium sulfate solution dropwise, and wait for the solution in the beaker to heat up After reaching 95°C, stir for 3 hours, filter the solution after the reaction, and place the filtrate at room temperature to cool until calcium sulfate dihydrate whiskers are precipitated;

[0034] S3. Filter the solution again to obtain ...

Embodiment 2

[0041] A method for reusing phosphorus-containing desulfurized gypsum, including a method for removing impurities from phosphorus-containing desulfurized gypsum and a method for preparing calcium sulfate hemihydrate whiskers;

[0042] Wherein said phosphorus-containing desulfurization gypsum impurity removal method comprises the following steps:

[0043] S1, the phosphorus-containing detached gypsum is dried in an oven and crushed into powder,

[0044] S2. Configure 120ml of 2.5mol / L hydrochloric acid solution in a beaker, place it in an oil bath at 98°C and stir for 5 minutes, then add 10g of phosphorus-containing desulfurized gypsum, add 75ml of 1mol / L sodium sulfate solution dropwise, and wait for the solution in the beaker to heat up Stir for 3.5 hours after reaching 98°C, filter the solution after the reaction, and place the filtrate at room temperature to cool until calcium sulfate dihydrate whiskers are precipitated;

[0045] S3. Filter the solution again to obtain cal...

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 relates to a phosphorus-containing desulfurized gypsum recycling treatment method which comprises the following steps: adding phosphorus-containing desulfurized gypsum, hydrochloric acid with a certain concentration and a sodium sulfate solution into an oil bath pan according to a certain sequence, keeping a certain temperature, fully stirring for a period of time, filtering and drying to obtain dephosphorized calcium sulfate dihydrate whiskers; and adding the prepared dephosphorized calcium sulfate dihydrate whisker, a certain amount of deionized water and a mixture of L-glutamic acid and amino polyethylene glycol carboxyl into a three-necked flask, stirring for a period of time at a certain temperature, filtering and drying to obtain the calcium sulfate hemihydrate whisker with the length-diameter ratio of (80:1)-(120:1). According to the phosphorus-containing desulfurized gypsum recycling treatment method, the phosphorus-containing desulfurized gypsum which is difficult to treat is prepared into the calcium sulfate hemihydrate crystal whiskers with wide industrial application, and the method is simple and low in cost.

Description

technical field [0001] The invention relates to the field of reusing phosphorus-containing desulfurized gypsum, in particular to a method for reusing phosphorus-containing desulfurized gypsum. Background technique [0002] SO produced by human life, production, and combustion of sulfur-containing fuels and emitted into the air 2 Up to more than 200 million tons per year, of which the flue gas SO produced by coal-fired power plants 2 Emissions accounted for SO 2 About half of the total emissions, a large amount of SO 2 The severe acid rain problem has brought great damage to the environment and economic development. In order to reduce emissions and reduce SO 2 In order to further pollute the country, it began to install flue gas desulfurization devices in coal-fired power plants. [0003] In my country's energy structure, coal accounts for about 70% of the amount used. And our country is currently in and will be in a period of coal as the main energy source for quite a l...

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): C30B29/46C30B29/62C30B7/10
CPCC30B29/46C30B29/62C30B7/10
Inventor 刘明旺陆平庄永卿张桃陈亮丹沙马什布徐祖睿傅人道
Owner HAINAN LANDAO ENVIRONMENTAL PROTECTION IND
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com