Preparation of potassium
Usually potassium is prepared by electrolyzing molten potassium chloride. However, there is very interesting synthesis for preparation of metallic potassium without electrolysis [1,2]
To the 250 ml round bottom flask fitted with reflux condenser, dropping 100 ml Shellsol D70 (which is alkanes and cycloalkanes of average molecular weight 174 g/mol with boiling point 200–240°C, d=0.79 g/l), 12.6 g potassium hydroxide, and 6.4 g magnesium powder are placed. The reaction flask is heated, and at 150° C, the magnesium reacts with the molten potassium hydroxide, generating hydrogen and magnesium oxide. From the dropping funnel 1.2 g tert-butyl alcohol in 5 ml D70 are slowly added and the temperature raised to 220° C, generating 5.6 g potassium (82% yield) in 4 hours. During the reaction the potassium is coalesced by the regeneration of tert-butyl alcohol and this can be completed by swirling the solids at 65° C in a stoppered flask with 50 ml dioxan to which 0.2 g tert-butyl alcohol have been added. The initiation stage is very sensitive to K-reactive species in the paraffin, and equivalent reactions with sodium are much slower due to the lower solubility of sodium tert-butoxide.
 Small-scale synthesis of laboratory reagents with reaction modeling, L. Lerner, 48, 2011
 Krennrich, O., Process for producing alkali metals in elemental form, U.S. Patent No. 4725311, 1988
potassium ion, potassium(1+), Potassium cation, Potassium(+), Potassium (ion), Potassium ion(+), Potassium monocation, Potassium (K+), Potassium ion(1+), Potassium ion (K+), 24203-36-9, UNII-295O53K152, K+, Potassium, ion (K1+), potassium(I) cation, Nabumeton A (TN), Potassium (1+), potassium(1+) ion, Potassium ion (K1+), AC1Q1TQB, AC1L1A2Z, 385883_ALDRICH, CHEBI:29103, HMDB00586, AR-1L1630, MCULE-5932450224, Potassium, ion (K1+) (8CI,9CI), AN-19412, K(+), 295O53K152, C00238, D08403, I14-57515, I14-115302, I14-115303, UNII-87GE52P74G component NPYPAHLBTDXSSS-UHFFFAOYSA-N, K1+
POTASSIUM, Kalium, CID813, 7440-09-7, 4-(2,3-Dihydroxypropyl)-2-(2-methylene-4,4-dimethylpentyl)succinate potassium salt solution, 52938-97-3