PROCESSING OF STABILISED COMPOSITIONS COMPRISING OLEFINS

• Main Authors: THORET-BAUCHET, JEAN-PIERRE, ADAM, CINDY, GUERIN, THIERRY, CHOFFAT, ALEXANDRINE
• Format: Patent
• Language: English; French
• Published: 20.07.2023
• Subjects: CHEMISTRY; CRACKING HYDROCARBON OILS; FUELS; LUBRICANTS; METALLURGY; MINERAL WAXES; PEAT; PETROLEUM, GAS OR COKE INDUSTRIES; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVEHYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, ORGASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; TECHNICAL GASES CONTAINING CARBON MONOXIDE

The present invention is a composition stabilized against premature polymerization comprising a) a hydrocarbon stream having a diene value of at least 0.5 g I2/100 g as measured according to UOP 326, a bromine number of at least 5 g Br2/ 100g as measured according to ASTM D1159, and containing at least 2 wt% of plastic liquefaction oil which is containing contaminants, wherein said contaminants comprise constituents which are not boiling below 700°C, preferably not below 600°C, such as gums in the form of plastic oligomers and residues of liquefaction of plastic, optionally metals and optionally solids, the remaining part of said hydrocarbon stream being a diluent, b) at least one additive capable to reduce gums formation or buildup, c) optionally at least one additive which is a dispersant agent, d) optionally at least one other additive which is a metal passivator and/or a metal chelating agent. La présente invention concerne une composition stabilisée contre la polymérisation prématurée comprenant a) un flux d'hydrocarbures ayant une valeur de diène d'au moins 0,5 g I2/100 g telle que mesurée selon UOP 326, un indice de brome d'au moins 5 g Br2/ 100g tel que mesuré selon la norme ASTM d1159, et contenant au moins 2 % en poids d'huile de liquéfaction de plastique qui contient des contaminants, lesdits contaminants comprenant des constituants qui ne bougent pas à moins de 700°C, de préférence à moins de 600°C, la partie restante dudit flux d'hydrocarbures étant un diluant, b) au moins un additif pouvant réduire la formation ou l'accumulation de gommes, c) éventuellement au moins un additif qui est un agent dispersant, d) éventuellement au moins un autre additif qui est un agent de passivation métallique et/ou un agent de chélation métallique.