C - Chemistry – Metallurgy – 10 – M
Patent
C - Chemistry, Metallurgy
10
M
C10M 175/00 (2006.01)
Patent
CA 2274831
The invention concerns a method and a plant for regenerating lubricating waste oil with low content of fuel, fatty acids and chloric products. The lubricating waste oil is subjected to the following steps successively: adding strong bases in aqueous solution at the rate of 0.5 to 3 % of pure bases by mass of waste oil; dehydrating and extracting the light hydrocarbons, extracting and recuperating the gas oil (stripping); extracting the impurities. The invention is characterised in that a complementary addition of a strong base in aqueous solution at the rate of 0.1 to 1 % by mass of waste oil is carried out following the dehydrating and extracting of light hydrocarbons. The treated lubricating waste oil are rid of their impurities by distillation.
La présente invention concerne un procédé et une installation de régénération d'huiles lubrifiantes usagées ayant une faible teneur en fuel, acides gras et produits chlorés. Les huiles lubrifiantes usagées sont soumises aux étapes successives dans l'ordre: adjonction de bases fortes en solution aqueuse à raison de 0,5 à 3% de bases pures en masse d'huiles usagées, déshydratation et extraction des hydrocarbures légers, extraction et récupération de gasoil (stripping), extraction des impuretés. Selon l'invention, une adjonction complémentaire d'une base forte en solution aqueuse en raison de 0,1 à 1% de bases pures en masse d'huiles usagées est réalisée postérieurement à l'étape de déshydratation et extraction des hydrocarbures légers. Les huiles lubrifiantes usagées ainsi traitées sont débarrassées de leurs impuretés par distillation.
Boufahja Med Ali
Dhaouadi Mohamed
Jaafar Abdelhafidh
Meziou Salah
Ouazzane Achour
Gowling Lafleur Henderson Llp
Societe Tunisienne de Lubrifiants-Sotulub
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