Anti-corrosive treatment of pyrolysis gasoline - with alkali-contg. bisulphite soln

Pyrolysis gasoline is rendered non-corrosive by contacting with an aqs. alkali-contg. alkali metal bisulphite soln. The treatment prevents corrosion of tanks and pipelines in contact with pyrolysis gasoline; this cannot be prevented by a single alkali wash. The treatment soln. pref. contains 5-100 g...

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Bibliographische Detailangaben
Hauptverfasser:	KAMIN,PAUL, KUNZE,DIETER, BOHLENDER,HEINRICH,DR
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	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
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Beschreibung
Zusammenfassung:	Pyrolysis gasoline is rendered non-corrosive by contacting with an aqs. alkali-contg. alkali metal bisulphite soln. The treatment prevents corrosion of tanks and pipelines in contact with pyrolysis gasoline; this cannot be prevented by a single alkali wash. The treatment soln. pref. contains 5-100 g/l bisulphite and has a pH of 5-9 (esp. 6.5-7.5). The bisulphite is pref. NaHSO3 or KHSO3. The alkali can be NaOH, KOH, Na2CO3 or K2CO3. The gasoline is pref. contacted with the soln. in countercurrent with a soln./gasoline vol. ratio of 0.05-0.2:1. The spent soln. can be regenerated by heat treatment (esp. steam stripping) and recycled.