000			02077nam a2200205 4500
005			20260520010229.0
008			260224s xxu
082			_aCD I116 43 0014775
100	1		_aMerino, Jerónimo _949416
111	2		_aCongreso de Producción (3er : 2006 sept. 19 al 22 : Mendoza) _937249
245	0	0	_aEffect of ß-Cholanic acid and ph on stability of water-in-model oil emulsions
260			_bInstituto Argentino del Petróleo y del Gas, IAPG
270			_a14/06/2012 ; 24/11/2006
300			_a13 p.
520			_aAsphaltenes fractionated from Hondo Crude Oil (a heavy crude from off-shore California) were dissolved in mixtures of toluene and heptane to create model oils. The emulsion stability of water-in-model oils was investigated over a range of pH. High pH (around 12) gave rise to water-in- oil emulsions with very high stability. However, the addition of 5-ß -Cholanic Acid (ß -CA), a carboxylic acid very similar to naphthenic acids found in petroleum fluids, to the model oil reduced dramatically the emulsion stability. This effect was more significant at higher pH (pH 12). Moreover, the amount of ß -CA that destabilized the water-in-oil emulsion at pH 12 was around 500 ppm. These results suggested that the presence of ß -Cholanic Acid or other naphthenic acids with similar structure could prevent the formation of stable W/O emulsions. With this in mind, water-in-petroleum emulsions were prepared in order to study the addition of ß -CA to different whole crude oils and evaluate the stability of the emulsion formed at high pH. The results from the later study were very satisfactory and demonstrate that carboxylic acids with a similar molecular structure to ß -CA (that is, a carboxylic acid for which its hydrophobic moiety is largely aliphatic) could break asphaltenic-film-stabilized emulsions.
650		0	_aEmulsiones petróleo - agua _91614
856			_uhttps://biblioteca.iapg.org.ar/cgi-bin/koha/opac-retrieve-file.pl?id=4df2fddbcf3c8fe8d2367067719ca2f8
942			_cCONGTP
999			_c180833 _d180833