Reclamation of used lubricating oil

Used lubricating oil comprising organometallic cpds. including zinc dithiophosphate (A) is reclaimed by (a) heating the oil to an additive decomp. temp. of 400-1000 deg.F; and (b) maintaining the temp. for 10-120 min. Concn. of (A) is reduced to 0.001 wt.% or less, in absence of chemical demetallisi...

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Bibliographische Detailangaben
Hauptverfasser:	GORNEAU, ARTHUR GERALD, STEINBERG, ROBERT MICHAEL, BOND, BRUCE ROY, HARRISON, CHARLES WESLEY
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BLASTING CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION COMBUSTION ENGINES COMBUSTION ENGINES IN GENERAL FUELS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATINGCOMPOSITIONS INTERNAL-COMBUSTION PISTON ENGINES LIGHTING LUBRICANTS LUBRICATING COMPOSITIONS MECHANICAL ENGINEERING METALLURGY PEAT PERFORMING OPERATIONS PETROLEUM, GAS OR COKE INDUSTRIES PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION TECHNICAL GASES CONTAINING CARBON MONOXIDE TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TRANSPORTING USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATINGINGREDIENTS IN A LUBRICATING COMPOSITION WEAPONS
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Beschreibung
Zusammenfassung:	Used lubricating oil comprising organometallic cpds. including zinc dithiophosphate (A) is reclaimed by (a) heating the oil to an additive decomp. temp. of 400-1000 deg.F; and (b) maintaining the temp. for 10-120 min. Concn. of (A) is reduced to 0.001 wt.% or less, in absence of chemical demetallising. Pref. steps (a) and (b) are followed by (c) vacuum distilling at 500-1050 deg.F, 20-500 mm Hg, esp. 500-750 deg.F, 50-150 mm Hg; and (d) recovering a distillate product containing 0.001 wt.% or less (A), and an asphaltic bottoms product comprising zinc and degradation products. Step (a) is carried out by direct heat exchange by admixing used oil, e.g. at 32-120 deg.F, with a heated product oil. After step (b), the product is heated to additive decomposition temp. by indirect heat exchange. Vol. ratio used oil to heated product oil in step (a) is 1:1 to 1:120. The process may be carried out continuously.