Oxybispotassium
Potassium oxide
CAS: 12136-45-7
Molecular Formula: K2O
Oxybispotassium - Names and Identifiers
| Name | Potassium oxide |
| Synonyms | Kaliumoxid Oxybispotassium Potassium oxide POTASSIUM OXIDE dipotassium oxide Potassium monoxide Potassium oxide (K2O) |
| CAS | 12136-45-7 |
| EINECS | 235-227-6 |
Oxybispotassium - Physico-chemical Properties
| Molecular Formula | K2O |
| Molar Mass | 94.196 |
| Density | 2.350 |
| Melting Point | decomposes at 350℃ [HAW93] |
| Boling Point | 691.46℃[at 101 325 Pa] |
| Water Solubility | soluble H2O, forming KOH; soluble alcohol and ether [HAW93] |
| Vapor Presure | 0Pa at 25℃ |
| Appearance | gray cubic crystals |
Oxybispotassium - Risk and Safety
| UN IDs | 2033 |
| Hazard Class | 8 |
| Packing Group | II |
Oxybispotassium - References
| LogP | -5.08 at 25℃ |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Overview | potassium oxide is an alkali metal oxide and does not exist alone in nature. In the ceramic industry, the introduction of feldspar, the role of sodium oxide similar. |
| Application | potassium oxide is mainly used in inorganic industry, is the manufacture of various potassium salts such as potassium hydroxide, potassium sulfate, potassium nitrate, potassium chlorate, the basic raw materials of potassium and so on. |
| production method | potassium oxide can be prepared by controlled oxidation of metallic potassium. First of all, to remove the difficult volatile oil substances on the surface of the metal potassium, the metal potassium must be repeatedly melted in xylene for several times, and then placed in a hard glass tube and pumped for distillation twice to remove the gas, the surface of the thus-treated metallic potassium is smooth. It is filtered through a capillary tube in a high vacuum into a container made of high-silica glass, which is heated slightly and passed into dry pure air in a small amount, microgranular potassium oxide was generated when the potassium oxide was introduced several times. The unreacted potassium metal melts due to the reaction heat and is adsorbed on the surface of the sponge-like potassium oxide to form an aggregate having a metallic luster, so that the formation of potassium peroxide can be avoided. Finally, the excess potassium metal was removed by vacuum distillation at 350 ° C., and the potassium oxide remaining in the vessel was up to 99.5 pure. |
Last Update：2024-04-10 22:29:15
