CN102965722B - By-product aqueous sodium persulfate solution micro emulsion method produces calcium sulfate whisker - Google Patents
By-product aqueous sodium persulfate solution micro emulsion method produces calcium sulfate whisker Download PDFInfo
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- CN102965722B CN102965722B CN201210426956.9A CN201210426956A CN102965722B CN 102965722 B CN102965722 B CN 102965722B CN 201210426956 A CN201210426956 A CN 201210426956A CN 102965722 B CN102965722 B CN 102965722B
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- China
- Prior art keywords
- calcium sulfate
- aqueous sodium
- sodium persulfate
- persulfate solution
- sulfate whisker
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Abstract
The invention discloses a kind of by-product aqueous sodium persulfate solution micro emulsion method and produce calcium sulfate whisker, concrete steps are as follows: be first metered into aqueous sodium persulfate solution, measure degree Beaume; Add calcium salt to metabisulfite solution moderate again, stir 20-30min, still aging 5-6 hour, is precipitated thing, with distilled water diluting, and add sulfuric acid dissolution, filter immediately after being then heated to boiling, namely filtrate crystallisation by cooling is obtained calcium sulfate crystal whiskers, dries, pack.The present invention utilizes NaSO
4waste water, makes calcium sulfate whisker, has both solved discharge of wastewater problem, has created benefit again, and its quality making calcium sulfate whisker is equal to hydrothermal method, and its processing requirement simplifies greatly, Be very effective.
Description
Technical field
The present invention relates to a kind of by-product aqueous sodium persulfate solution micro emulsion method and produce calcium sulfate whisker, belong to chemical technology field.
Background technology
By-product sodium sulfate cost recovery in zinc subcarbonate production annoyings the development of enterprise always, and for solving this difficult problem, my company successfully develops the novel method utilizing by-product aqueous sodium persulfate solution micro emulsion method to produce calcium sulfate whisker.At present, the method for extracting sulfuric acid calcium pyroborate generally has water autoclave process and normal pressure acidization, and hydrothermal method is added in water autoclave by the dihydrate gypsum suspension being less than 2%, under saturated vapour pressure, dihydrate gypsum is converted into needle-like semi-hydrated gypsum, and the method cost is high, applies restricted.Normal pressure acidization is that high density dihydrate gypsum suspension changes needle-like hemihydrate calcium sulfate crystal whisker in an acidic solution at ambient temperature, although this method is better than hydrothermal method, can produce acid waste water.Our company's micro emulsion method produces the exploitation of calcium sulfate whisker, well solves a recovery difficult problem for enterprise and creates considerable economic benefit.
Summary of the invention
The object of the invention is to for the deficiencies in the prior art, provide a kind of by-product aqueous sodium persulfate solution micro emulsion method to produce calcium sulfate whisker, solve process NaSO
4the problems such as during waste water, cost is high, and added value is low.
The technical solution used in the present invention is as follows:
A kind of by-product aqueous sodium persulfate solution micro emulsion method produces calcium sulfate whisker, comprises the following steps:
(1) aqueous sodium persulfate solution is measured in input processing pond, measure degree Beaume;
(2) add calcium chloride to metabisulfite solution moderate and carry out desulphurization reaction, control PH is at 7.5-8.0, and stir 20-30min, stirring velocity controls at 30-60r/min;
(3), after still aging 5-6h, upper clear supernate delivers to crystallizing pond for multiple solarization Industrial Salt processed, and bottom throw out is for the preparation of calcium sulfate crystal whiskers;
(4) by the throw out of step (3) gained with distilled water diluting 5-8 doubly, and add 2-3mol/L sulfuric acid dissolution, controls PH, at 2-3, filters immediately after being heated to boiling, namely filtrate crystallisation by cooling is obtained calcium sulfate crystal whiskers, and oven dry, packs.
Aforesaid method reaction equation is as follows:
NaSO
4+Ca
2+-----→CaSO
4+Na
2+
Beneficial effect of the present invention:
The present invention utilizes NaSO
4waste water, makes calcium sulfate whisker, has both solved discharge of wastewater problem, has created benefit again, and its quality making calcium sulfate whisker is equal to hydrothermal method, and its processing requirement simplifies greatly, Be very effective.
Embodiment
Embodiment
A kind of by-product aqueous sodium persulfate solution micro emulsion method produces calcium sulfate whisker, comprises the following steps:
(1) by 5L aqueous sodium persulfate solution metering input processing pond, measure degree Beaume 24 ° of B é, then the proportion of aqueous sodium persulfate solution is 1.2g/cm
3;
(2) in metabisulfite solution, add 4.6kg calcium chloride and carry out desulphurization reaction, control PH is 7.6, and stir 30min, stirring velocity controls at 50r/min;
(3), after still aging 6h, upper clear supernate delivers to crystallizing pond for multiple solarization Industrial Salt processed, and bottom throw out is for the preparation of calcium sulfate crystal whiskers;
(4) by the throw out of step (3) gained distilled water diluting 8 times, and add 2.5mol/L sulfuric acid dissolution, control PH, 3, filters immediately after being heated to boiling, namely filtrate crystallisation by cooling is obtained calcium sulfate crystal whiskers, dries, packs.
The obtained calcium sulfate whisker diameter of the inventive method is 1-20um, length between 200-300mm, complete conformance with standard.
Claims (1)
1. by-product aqueous sodium persulfate solution micro emulsion method produces a calcium sulfate whisker, it is characterized in that comprising the following steps:
(1) aqueous sodium persulfate solution is measured in input processing pond, measure degree Beaume;
(2) add calcium chloride to metabisulfite solution moderate and carry out desulphurization reaction, control PH is at 7.5-8.0, and stir 20-30min, stirring velocity controls at 30-60r/min;
(3) after still aging 5-6h, upper clear supernate delivers to crystallizing pond for multiple solarization Industrial Salt processed, and bottom throw out is used
In preparing calcium sulfate crystal whiskers;
(4) through step (3) gained throw out with distilled water diluting 5-8 doubly, and add 2-3mol/L sulfuric acid dissolution, controls PH, at 2-3, filters immediately after being heated to boiling, namely filtrate crystallisation by cooling is obtained calcium sulfate crystal whiskers, and oven dry, packs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210426956.9A CN102965722B (en) | 2012-10-31 | 2012-10-31 | By-product aqueous sodium persulfate solution micro emulsion method produces calcium sulfate whisker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210426956.9A CN102965722B (en) | 2012-10-31 | 2012-10-31 | By-product aqueous sodium persulfate solution micro emulsion method produces calcium sulfate whisker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102965722A CN102965722A (en) | 2013-03-13 |
| CN102965722B true CN102965722B (en) | 2015-12-09 |
Family
ID=47796149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210426956.9A Expired - Fee Related CN102965722B (en) | 2012-10-31 | 2012-10-31 | By-product aqueous sodium persulfate solution micro emulsion method produces calcium sulfate whisker |
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| CN (1) | CN102965722B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106745154A (en) * | 2016-11-24 | 2017-05-31 | 上海大学 | A kind of method that high length-diameter ratio calcium sulfate nano wire is prepared under cryogenic conditions |
| CN112011830A (en) * | 2020-08-31 | 2020-12-01 | 湖北工业大学 | Method for preparing anhydrous calcium sulfate nanowhiskers at room temperature |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1297874A (en) * | 1999-11-30 | 2001-06-06 | 山东省农药研究所 | Preparation of benzaldehyde dialkyl acetal or substituted benzaldehyde dialkyl acetal |
| CN101550585A (en) * | 2009-04-16 | 2009-10-07 | 北京矿冶研究总院 | Preparation method of dehydrated calcium sulfate whisker |
| CN102352535A (en) * | 2011-09-22 | 2012-02-15 | 东莞上海大学纳米技术研究院 | Method for preparing calcium sulfate crystal whiskers from desulfurized gypsum under normal pressure |
-
2012
- 2012-10-31 CN CN201210426956.9A patent/CN102965722B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1297874A (en) * | 1999-11-30 | 2001-06-06 | 山东省农药研究所 | Preparation of benzaldehyde dialkyl acetal or substituted benzaldehyde dialkyl acetal |
| CN101550585A (en) * | 2009-04-16 | 2009-10-07 | 北京矿冶研究总院 | Preparation method of dehydrated calcium sulfate whisker |
| CN102352535A (en) * | 2011-09-22 | 2012-02-15 | 东莞上海大学纳米技术研究院 | Method for preparing calcium sulfate crystal whiskers from desulfurized gypsum under normal pressure |
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|---|---|
| CN102965722A (en) | 2013-03-13 |
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Granted publication date: 20151209 Termination date: 20161031 |