Naslov
Efficiency of the rinsing agent on reduction of the B2O3 mass fraction in seawater-derived magnesium oxide

Autori
Martinac, Vanja ; Labor, Miroslav ; Jakić, Jelena

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
13th Ružička Days "Today Science - Tomorrow Industry" - Book of Abstracts / Šubarić, Drago - Osijek : Prehrambeno tehnološki fakultet Sveučilišta Josipa Jurja Strossmayera u Osijeku ; Hrvatsko društvo kemijskih inženjera i tehnologa (HDKI), 2010

ISBN
978-953-7005-22-1

Skup
13th Ružička Days

Mjesto i datum
Vukovar, Hrvatska, 16.09.2010. - 17.09.2010

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
rinsing agent; B2O3 content; magnesium oxide; seawater

Sažetak
This study has examined the combined method of rinsing the magnesium hydroxide precipitate (3+2) in which alkalized distilled water with pH = 12.50 is used in the decanting procedure in the first phases, followed by fresh distilled water with pH = 5.30. In multiple rinsing on filter paper (up to three times) the alkalized distilled water with pH = 12.5 and/or combined rinsing method (2+3) was applied, i.e. after the precipitate had been rinsed 2 times by alkalized distilled water, it was rinsed with fresh distilled water (up to 3 times). The purpose of the study was to establish the efficiency of these methods of rinsing the seawater-derived magnesium hydroxide precipitate on reduction of the mass fraction of boron (III) oxide in calcined magnesium oxide, as the properties of seawater-derived high-temperature sintered magnesium oxide are greatly affected by the B2O3 fraction. The experimental results indicate that it suffices to perform the rinsing on filter paper by alkalized distilled water with pH = 12.50 two times. This method of rinsing attains the total reduction of the B2O3 fraction by approx. 61 % relative to the B2O3 fraction in samples prepared without rinsing of the magnesium hydroxide precipitate (B2O3 = 0.2533 mass %). If, together with rinsing on filter paper, the combined method (2+3) is applied, the mass fraction of B2O3 in calcined magnesium oxide is reduced by approx 69 % relative to the not-rinsed sample.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

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