Methods for improving solvent properties
This publication is copyrighted. You may download, display and print it for Your own personal use. Commercial use is prohibited.
In hydrometallurgical processes, the separation of nickel and cobalt is challenging. Cyanex272 dialkyl phosphinic acid is generally used to separatet hese elements. The most eﬀective separation requires that the reaction mixture be as pure as possible from various interferences such as carboxylic acids. This thesis investigates various possibilities for removing carboxylic acids from the extraction mixture. Possibility of utilizing diﬀerent pH isotherms and diﬀerent water solubilities of carboxylic acids and Cyanex 272 for separation was investigated. Normal phase chromatography was attempted with one minute fractioning and ﬁnally molecular catcher was tested. Separation of extractants in these experiments, with these parameters failed.Possibility of utilizing diﬀerent pH isotherms and diﬀerent water solubilities of carboxylic acids and Cyanex 272 for separation was investigated. Normal phasechromatographywasattemptedwithoneminutefractioningandﬁnally molecular catcher was tested. Separation of extractants in these experiments, with these parameters failed ...
MetadataShow full item record
- Pro gradu -tutkielmat 
Showing items with similar title or keywords.
A multiresidue analytical method for trace level determination of antibiotics and antiretroviral drugs in wastewater and surface water using SPE-LC-MS/MS and matrix-matched standards Ngumba, Elijah; Kosunen, Päivi; Gachanja, Anthony; Tuhkanen, Tuula (RSC Publications, 2016)An analytical method for simultaneous determination of seven commonly used antibiotics and three antiretrovirals in surface water and urban wastewater at the ng L−1 level has been developed. The method involves concentration ...
Valto, Piia (University of Jyväskylä, 2011)A fast analysis method with an online sample enrichment technique for the analysis of resin and fatty acids present in papermaking process waters was developed. This method was based on atmospheric pressure chemical ...
Coordination Complexes of a Neutral 1,2,4-Benzotriazinyl Radical Ligand: Synthesis, Molecular and Electronic Structures, and Magnetic Properties Morgan, Ian; Mansikkamäki, Akseli; Zissimou, Georgia A.; Koutentis, Panayoitis A.; Rouzières, Mathieu; Clérac, Rodolphe; Tuononen, Heikki (Wiley - VCH Verlag GmbH & Co. KGaA, 2015)A series of d-block metal complexes of the recently reported coordinating neutral radical ligand 1-phenyl-3-(pyrid-2-yl)-1,4-dihydro-1,2,4-benzotriazin-4-yl (1) was synthesized. The investigated systems contain the ...
Halmemies, Eelis S.; Brännström, Hanna E.; Nurmi, Juha; Läspä, Otto; Alén, Raimo (MDPI, 2021)Increasing the net value of forestry side-streams has both ecological as well as economic benefits for emerging biorefining industries. Spruce bark represents one of the nature’s abundant sources of valuable extractives. ...
Advancements in Sustainable PVDF Copolymer Membrane Preparation Using Rhodiasolv® PolarClean As an Alternative Eco-Friendly Solvent Russo, Francesca; Ursino, Claudia; Sayinli, Burcu; Koyuncu, Ismail; Galiano, Francesco; Figoli, Alberto (MDPI AG, 2021)In this work, Rhodiasolv® PolarClean was employed as a more sustainable solvent for the preparation of poly(vinylidene fluoride-hexafluoropropylene) (PVDF-HFP) flat sheet membranes via phase inversion technique by coupling ...