Identification of alkyl carbazoles and alkyl benzocarbazoles in Brazilian petroleum derivatives

Introduction to Oil Chemistry and Properties Related to Oil Spills

“…Alkanes, an important part of saturate composition, are hydrocarbons with a chainlike structure and without double bonds or atoms of other elements such as sulfur, nitrogen, or oxygen attached (Neumann et al 1981). Alkanes, sometimes called paraffins, are typically the most abundant compounds in crude oils as well as in most fuels such as diesel fuel and gasoline.…”

“…The branching potential for alkanes increases as the size of the alkane increases. Table 4 shows the typical alkanes contained in crude oils and some fuels (Wang et al 1993(Wang et al : 2003CRC 2016CRC -2017Yalkowsky et al 2010;Mackay et al 1992;Verchueren 2001;Faksness et al 2010;Wang and Brown 2008). Some properties and content of n-alkanes in some crude oils are also shown in this table.…”

“…Sulfur compounds constitute a significant percentage of some crude oils and are also found in petroleum products as an unwanted contaminant (Neumann et al 1981).…”

Phase behaviour of heavy petroleum fractions in pure propane and n-butane and with methanol as co-solvent

“…The other one is the residue of such distillation (RAT), and to completeness, crude petroleum Marlim samples were also employed in phase equilibrium. petroleum samples utilized in this work can be found in the literature [4,6,17,18]. …”

Síntese De 11a-N-Arilsulfonil-Tetrahidro-5h-Benzo[a]carbazóis Com Ação Antitumoral

“…Os benzocarbazóis pertencem à classe de alcaloides indólicos sendo identificados em derivados de petróleo, rochas e carvão (OLIVEIRA et al, 2006;CAO et al, 2010;FABOYA et al, 2014 JOHANSSON SEECHURN et al, 2012 ;YANG et al, 2013).…”