Production of potassium sulfate from potassium hydrosulfate solutions using alcohols

Mientka, Agnieszka, Grzmil, Barbara and Tomaszewska, Maria Production of potassium sulfate from potassium hydrosulfate solutions using alcohols Chemical Papers, Vol.62, No. 1, 2008, 123-126

Document type: Článok z časopisu / Journal Article
Collection: Chemical papers  

Author(s) Mientka, Agnieszka
Grzmil, Barbara
Tomaszewska, Maria
Title Production of potassium sulfate from potassium hydrosulfate solutions using alcohols
Journal name Chemical Papers
Publication date 2008
Year available 2008
Volume number 62
Issue number 1
ISSN 0366-6352
Start page 123
End page 126
Place of publication Poland
Publisher Versita
Collection year 2008
Language english
Subject 290000 Engineering and Technology
291100 Environmental Engineering
Abstract/Summary Potassium sulfate is used to produce multicomponent fertilizers, free of chlorides. The desalting out of potassium sulfate from an aqueous solution of potassium hydrosulfate was conducted using 40 mass %, 45 mass %, or 50 mass % aqueous solutions of either methanol or propan-2-ol. Composition of the resultant precipitate was analyzed using chemical methods and XRD analysis. The results of the XRD analysis revealed that the main precipitate phase is K2SO4. Small amounts of K5H3(SO4)4 were detected when the desalting out was carried out from 2.5 M KHSO4 solution using 40 mass % and 50 mass % methanol solution. When the amount of potassium bisulfate in the solution increased to 3.5 M and 3.8 M, the main phase consisted of K3H(SO4)2. Generally, the desalting out process using propan-2-ol caused the formation of K3H(SO4)2. Potassium sulfate was obtained only by desalting out the 2.5 M KHSO4 solution using 50 mass % aqueous propan-2-ol.
 
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