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Preparation method of high-performance calcium sulfate whisker based on inorganic-organic hybrid modification

A calcium sulfate whisker, organic hybrid technology, applied in chemical instruments and methods, crystal growth, single crystal growth and other directions, can solve problems such as lack of research

Pending Publication Date: 2021-09-14
黔南高新区绿色化工技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be known from the above prior art that calcium sulfate whiskers can be prepared by using pretreated phosphogypsum as raw material by atmospheric acidification and hydrothermal methods, but how to modify the prepared calcium sulfate whiskers to improve their application performance no research

Method used

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  • Preparation method of high-performance calcium sulfate whisker based on inorganic-organic hybrid modification

Examples

Experimental program
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Embodiment 1

[0024] Grind phosphogypsum and mix with water to control the ratio of material to liquid to 1:4, stir and wash for 10 minutes, then let it settle for precipitation, remove the upper impurity solution, continue to add water to the precipitation for washing, and repeat this for 3-5 times to obtain purified phosphorus Gypsum: Add 100g of purified phosphogypsum to 500g of hot sodium chloride solution at a temperature of 95°C and a concentration of 15wt%, add dropwise a 1mol / L hydrochloric acid solution to adjust the pH of the solution to 2.2, react at a constant temperature for 2 hours, and filter while hot after the reaction , and washing the filtered solid to neutrality, and drying in vacuum to obtain calcium sulfate whiskers;

[0025] Add 2g of zein and 0.65g of gelatin to 10ml of 75wt% acetic acid solution and stir until the solid dissolves, then add 4g of calcium sulfate whiskers, stir at 2000rpm for 30min, filter, and dry the solid to obtain zein alcohol Calcium sulfate whis...

Embodiment 2

[0028] Grind phosphogypsum and mix it with water to control the ratio of material to liquid to 1:4, stir and wash for 20 minutes, then let it settle for precipitation, remove the upper impurity solution, continue to add water to the precipitation for washing, and repeat this for 3-5 times to obtain purified phosphorus Gypsum: Add 200g of purified phosphogypsum to 500g of hot sodium chloride solution at a temperature of 95°C and a concentration of 20wt%, add dropwise 1mol / L hydrochloric acid solution to adjust the pH of the solution to 2.2, react at a constant temperature for 4 hours, and filter while hot after the reaction , and washing the filtered solid to neutrality, and drying in vacuum to obtain calcium sulfate whiskers;

[0029] Add 3g of zein and 0.85g of gelatin to 15ml of 80wt% acetic acid solution and stir until the solid dissolves, then add 4-5g of calcium sulfate whiskers, stir at 5000rpm for 60min, filter, and dry the solid to obtain Calcium sulfate whiskers modif...

Embodiment 3

[0032]Grind phosphogypsum and mix it with water to control the ratio of material to liquid to 1:4, stir and wash for 20 minutes, then let it settle for precipitation, remove the upper impurity solution, continue to add water to the precipitation for washing, and repeat this for 3-5 times to obtain purified phosphorus Gypsum: Add 180g of purified phosphogypsum to 500g of hot sodium chloride solution at a temperature of 95°C and a concentration of 15wt%, add dropwise 1mol / L hydrochloric acid solution to adjust the pH of the solution to 2.2, react at a constant temperature for 3 hours, and filter while hot after the reaction , and washing the filtered solid to neutrality, and drying in vacuum to obtain calcium sulfate whiskers;

[0033] Add 2.5g of zein and 0.7g of gelatin to 15ml of 75wt% acetic acid solution and stir until the solid dissolves, then add 4.5g of calcium sulfate whiskers, stir at 3000rpm for 3h, filter, and dry the solid to obtain Calcium sulfate whiskers modified...

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Abstract

The invention discloses a preparation method of a high-performance calcium sulfate whisker based on inorganic-organic hybrid modification, which comprises the following steps: carrying out purification treatment on phosphogypsum to obtain purified phosphogypsum; adding the purified phosphogypsum into a hot sodium chloride solution, and conducting reacting at a constant temperature to prepare calcium sulfate whiskers; dissolving zein and gelatin in an acetic acid solution, adding calcium sulfate whiskers, conducting stirring, conducting filtering, and drying solids to obtain zein / gelatin composite modified calcium sulfate whiskers; and uniformly mixing an acrylamide monomer, N,N-methylene bisacrylamide, potassium persulfate and deionized water, dropwise adding a boron nitride nanosheet dispersion liquid, carrying out a heating reaction, cooling the reaction liquid to room temperature after the reaction is finished, adding the zein / gelatin composite modified calcium sulfate whisker, carrying out stirring treatment, carrying out filtration, and drying the solid to obtain the high-performance calcium sulfate whisker. The prepared calcium sulfate whisker is good in stability and excellent in performance.

Description

technical field [0001] The invention relates to the field of preparation of inorganic materials, in particular to a method for preparing high-performance calcium sulfate whiskers based on inorganic-organic hybrid modification. Background technique [0002] At present, my country is facing the problem of phosphogypsum to be used. The phosphoric acid industry in my country will produce a large amount of phosphogypsum by-products, which will reach 4 to 5 times the production of phosphoric acid. A large amount of phosphogypsum stockpiling has caused serious social and environmental issues. At present, the dihydrate method is commonly used for the production of wet-process phosphoric acid, but the impurities in the by-product phosphogypsum produced by this process are relatively complicated. In order to make good use of dihydrate gypsum, researchers at home and abroad have mainly focused on dihydrate gypsum in the research on the utilization of phosphogypsum. A large amount of p...

Claims

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Application Information

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IPC IPC(8): C30B29/62C30B33/00B05D1/02B05D1/18B05D1/36B05D7/00B05D7/24C30B7/10C30B29/46
CPCC30B29/62C30B29/46C30B7/10C30B33/00B05D7/24B05D7/54B05D1/18B05D1/02B05D1/36
Inventor 周春松
Owner 黔南高新区绿色化工技术研究院有限公司
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