Un schetticr d'antilyse chiwigtie complete des residus tourds de petrole et des bitutties U ete etabli. Grcice ii l'utilisation de ce schitna et des nouvelles techniques de fractionnement, plusieurs classes tlistinctes de constittiants de ces produits ont PtP skparees et identiflees. En particulier les methodes de precipitation graduelle, de chromatographie, de crastQllisation fractionnie ont et6 perfectionntes. La presente etude donne de nombreur esemples de traitement. IJa separation ties composes sulfiires a et& egalement 6tudii.e. Des combinaisons sulfuries cristallines ont cte dkouvertes et isoltes ti partir des milanges d'hydrocarbures solides provenant de rksidus de petrole dti Moyen Orient. Enpn me etude pr6- l iminaire des spectres iiftra-violets et infra-rouges (6 - 1 5 p. I des constituants les plus compleres a ete P/Jecttiec.
L schetue o/ cottiplete chemical unalijsis for heacu petroleum residues iind for Oitiiirietis has been deceloped. Rv employing this method and new fractionating techniques it has been possible to separate and identify several dastinct classes of components of these products. In particular, the method of gradual precipitation, the chromatographic and the fractional crustallisation techniques have been improved. The paper gives several eaaniples of processes used. Separation 01 sulphur compounds has also been studied. Crystalline sulphur cornpounds have been discorwed and separated, startang from solid hydrocarbon mixtures from Middle East petroleum residues. A preliminary study has beeir made of the ultra-violet and infra -red spectra (6 - 1 5 pj of the most complex components.
I? stato messo a punto un sistenla cli ana4isi chimica cotnpleta dei residui pesanti del petrolio e dei bitumi. Grazie a questo sistema e ad alcune nuove tecniche rli frasaonamento, .? stato possibile scindere ed iilentiflcare nurnerose classi distinte di costitshenti di tali prodotti. Sono stati in particolare perfezionati i metodi di precipitazione graduale, di crornatogrnfia edi distillazione frazion ata, come risulta dui nunzerost esempa descritti in quesla memoria. B statu pure oggetto di studio la scissione (lei coinposti solforati; anfatti, pnrtendo da miscugli d'idrocarburi solidi procenienti da residui petroliferi del Mpdio Orimte, sono stati scoperti ed isolati alcuni composti solfornti cristallini. J? stato inpne compiuto uno studio preliminare degli sprttri ultra-violetti ed infrarossi (6 - 1 5 *L) dei costituenti dei residui pith complessi. (*) Compagnie Francaise de Raffinage, France. 214 PROCEEDINGS FOURTH WORLD PETROLEUM CONGRESS-SECTION V/B Introduction une nouvelle serie de combinaisons soufrkes cristallines.
Dans une des communications presentees au Les mbthodes spectrales doivent attirer une IIL" Congres Mondial du Petrole,
