Ozokerite 1530838 211784188 2008-05-12T02:17:11Z Tillman 1663062 Quick-adding category "Hydrocarbons" (using [[WP:HOTCAT|HotCat]]) [[Image:Ozokerite-byu.jpg|thumb]] [[Image:Ozokerite natural Paraffin wax Soldier Summit Minnind District - Colton - Wasatch County Utah 1963.jpg|thumb|right||Ozokerite, [[Wasatch County, Utah]] ]] '''Ozokerite''' or '''ozocerite''' (Gr. ''oze'', stench, and ''kero'', wax) is a naturally-occurring odoriferous [[mineral wax]] or [[paraffin]] found in many localities. ==Sources== Specimens have been obtained from [[Scotland]], [[Northumberland]] and [[Wales]], as well as from about thirty different countries. Of these occurrences the ozokerite of the island (now peninsula) of [[Cheleken]], near [[Turkmenbashi]], and the deposits of [[Utah]] in the US, deserve mention, though the last-named have been largely worked out. The sole sources of commercial supply are in [[Galicia (Central Europe)|Galicia]], at [[Boryslaw]], [[Dzwiniacz]] and [[Starunia]], though the mineral is found at other points on both flanks of the [[Carpathian Mountains|Carpathians]]. Ozokerite deposits are believed to have originated in much the same way as mineral veins, the slow evaporation and oxidation of [[petroleum]] having resulted in the deposition of its dissolved paraffin in the fissures and crevices previously occupied by the liquid. As found native, ozokerite varies from a very soft wax to a black mass as hard as [[gypsum]]. ==Properties== Its specific gravity ranges from 0.85 to 0.95, and its melting point from 58 to 100 °C. It is soluble in [[diethyl ether|ether]], petroleum, [[benzene]], [[turpentine]], [[chloroform]], [[carbon disulfide]], &c. Galician ozokerite varies in color from light yellow to dark brown, and frequently appears green owing to dichroism. It usually melts at 62 °C. Chemically, ozokerite consists of a mixture of various [[hydrocarbon]]s, containing 85-7% by weight of carbon and 14-3% of hydrogen. ==Mining== The mining of ozokerite was formerly carried on in Galicia by means of hand-labor, but in the ozokerite mines owned by the [[Boryslaw Actien Gesellschaft]] and the [[Galizische Kreditbank]], the workings of which extend to a depth of 200 metres, and 225 metres respectively, electrical power is employed for hauling, pumping and ventilating. In these mines there are the usual main shafts and galleries, the ozokerite being reached by levels driven along the strike of the deposit. The wax, as it reaches the surface, varies in purity, and, in new workings especially, only hand-picking is needed to separate the pure material. In other cases much earthy matter is mixed with the material, and then the rock or shale having been eliminated by hand-picking, the " wax-stone " is boiled with water in large coppers, when the pure wax rises to the surface. This is again melted without water, and the impurities are skimmed off, the material being then run into slightly conical cylindrical [[molding (process)|moulds]], and thus made into blocks for the market. The crude ozokerite is refined by treatment first with [[oil of vitriol]], and subsequently with [[charcoal]], when the [[ceresine]] or cerasin of commerce is obtained. The refined ozokerite or ceresine, which usually has a melting-point of 61 to 78 °C, is largely used as an [[adulterant]] of [[beeswax]], and is frequently colored artificially to resemble that product in appearance. On distillation in a current of superheated steam, ozokerite yields a [[candle]]-making material resembling the paraffin obtained from petroleum and shale-oil but of higher melting-point, and therefore of greater value if the candles made from it are to be used in hot climates. There are also obtained in the distillation light oils and a product resembling [[vaseline]]. The residue in the stills consists of a hard, black, waxy substance, which in admixture with [[India-rubber]] was employed under the name of [[okonite]] as an [[electrical insulator]]. From the residue a form of the material known as [[heel-ball]], used to impart a polished surface to the heels and soles of boots, was also manufactured. Mining of ozokerite fell off after 1940 due to competition from [[paraffin]]s manufactured from [[petroleum]], but as it has a higher melting point than most petroleum waxes, it is still favored for some applications, such as electrical insulators and candles, or in extra-soft paper tissues. ==References== {{1911}} [[Category:Waxes]] [[Category:Hydrocarbons]] [[de:Ozokerit]] [[it:Ozokerite]] [[pl:Ozokeryt]] [[ru:Озокерит]] [[uk:Озокерит]]