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Single-State Process for Manufacturing of Potassium Sulphate from Sodium Sulphate
Grzmil, B. U. and Kic, B. Single-State Process for Manufacturing of Potassium Sulphate from Sodium Sulphate Chemical Papers, Vol.59, No. 6b, 2005, 476-480
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Document type:
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Článok z časopisu / Journal Article |
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Collection:
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Chemical papers
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| Attached Files |
| Name |
Description |
MIMEType |
Size |
Downloads |
n596ba476.pdf
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596ba476.pdf |
application/pdf |
155.07KB |
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| Author(s) |
Grzmil, B. U.
Kic, B.
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| Title |
Single-State Process for Manufacturing of Potassium Sulphate from Sodium Sulphate
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| Journal name |
Chemical Papers
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| Publication date |
2005
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| Year available |
2005
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| Volume number |
59
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| Issue number |
6b
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| ISSN |
0366-6352
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| Start page |
476
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| End page |
480
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| Place of publication |
Poland
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| Publisher |
Versita
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| Collection year |
2005
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| Language |
english
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| Subject |
290000 Engineering and Technology
291100 Environmental Engineering
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| Abstract/Summary |
A single-stage process for the conversion of sodium sulphate (anhydrous or hydrated, of natural or anthropogenic origin) with potassium chloride in aqueous solution at 20—25◦C to potassium sulphate was developed. Both reagent grade sodium sulphate and that formed as a by-product during trimethylolpropane synthesis were used as raw material. Initial reaction mixture contained less than 30 mass % of salts with the calculated mole ratios n(KCl) : n(Na2SO4) ≥ 6; n(K2SO4 : n(NaCl) ≥ 1. Resulting potassium sulphate contained about 96 mass % of K2SO4, 0.5 mass % of Cl−, and 0.2 mass % of Na+. At the first stage, a mixture of potassium chloride with glaserite was separated from the mother liquor after the separation of K2SO4 through solvent evaporation followed by crystallization at temperatures ≤ 2◦C. During the second stage, sodium chloride was separated from the solution obtained after the solvent evaporation and crystallization at 110◦C. Both, the mixture of KCl and K3Na(SO4)2 and the remaining end-liquor were recycled to the conversion stage. Raw sodium chloride was a by-product formed in the process.
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