Determination of low sulfur concentrations in oils and organic solids

✍ Scribed by E.W. Seefield; J.W. Robinson

• Publisher: Elsevier Science
• Year: 1960
• Tongue: English
• Weight: 386 KB
• Volume: 22
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/s0003-2670(00)88242-2

✦ Synopsis

l'hc

pctrolcum industry has long recognized sulfur as one of the most troublesome contaminants in yctrolcum streams. It dcactivatcs some catalysts and usually imparts an offensive odor to products; thus, it is important to know and control the sulfur concentration in feeds and product. Recently, the need arose for knowing sulfur concentrations below zoo p.p.m. in waxes and heavy gas oils. Traditional high tcmpcrature combustion methods arc inadequate at this concentration bccausc of the rclatlvcly inscnsitivc titrimctrrc fimshing teclmiqucs cmploycd. Lamp sulfur proccdurcs which arc normally employed in this range arc not applicable to these types of samples; thus, it became necessary to develop a new m&hod.

'l'hc flrqt method invcstigatcd was based on combustion-ncplrclometry and involvctl prccqitation of sulfur as barium sulfate. However, poor precision was cxpericnccd with this technique. A survey of the litcraturc revealecl a colorimctric mctllod by

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