Naslov
Boric oxide in seawater derived magnesia

Autori
Martinac, Vanja ; Labor, Miroslav ; Petric, Nedjeljka

Izvornik
Indian Journal of Marine Sciences (0379-5136) 33 (2004), 3; 226-230

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
substoichiometric precipitation; rinsing method; boric oxide; seawater; magnesia

Sažetak
The study has examined the possibility of application of the combined rinsing method used to rinse the precipitate of magnesium hydroxide obtained from seawater by substoichiometric precipitation with the addition of 80 percentage of the stoichiometric quantity of the dolomite lime as the precipitation agent. The rinsing agent was distilled water with pH=6.25 and alkalised distilled water with pH=12.50. The product quality was established by determining the concentrations of MgO, CaO and B_2O_3 in the calcined magnesium oxide. The purpose of the study was to determine the operating conditions that might be used for production of good quality caustic magnesia from seawater, i.e. caustic MgO with a low B_2O_3 and CaO content. It has been noted that the contents of B_2O_3 and CaO in caustic magnesia from seawater are significantly reduced by this rinsing method, which is of considerable importance as the substoichiometric precipitation is much more economical than the overstoichiometric one in the so-called "wet phase".

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

POVEZANOST RADA