Production of potassium sulfate from potassium hydrosulfate solutions using alcohols
-
Agnieszka Mientka
,
Barbara Grzmil
Abstract
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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© 2008 Institute of Chemistry, Slovak Academy of Sciences
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Articles in the same Issue
- Photocatalytic reduction of CO2 over TiO2 based catalysts
- Modeling of enzymatic reaction in an airlift reactor using an axial dispersion model
- Hydrolysis of titanium sulphate compounds
- Mathematical modelling of selected characterisation procedures for oil fractions
- High gravity batch and continuous processes for beer production: Evaluation of fermentation performance and beer quality
- Liquid-liquid equilibria of butyric acid for solvents containing a phosphonium ionic liquid
- HAZOP study of a fixed bed reactor for MTBE synthesis using a dynamic approach
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- Mixing time of a non-Newtonian liquid in an unbaffled agitated vessel with an eccentric propeller
- Heat transfer coefficient and pressure drop during refrigerant R-134a condensation in a plate heat exchanger
- Pore structure of pyrolyzed scrap tires
- Distribution of local heat transfer coefficient values in the wall region of an agitated vessel
- Chemical pretreatment of feed water for membrane distillation
- Selective methane oxidation to formaldehyde using polymorphic T-, M-, and H-forms of niobium(V) oxide as catalysts
- Validation of the Tessier scheme for speciation of metals in soil using the Bland and Altman test
- Production of potassium sulfate from potassium hydrosulfate solutions using alcohols
