Reduction of the coking in cracking reactors

• Main Authors: BRUN, CLAUDE, WOERDE, HARRY M, HUMBLOT, FRANCIS, VAN DEN OOSTERKAMP, PAUL F
• Format: Patent
• Language: English
• Published: 11.09.2007
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; APPARATUS THEREFOR; CHEMISTRY; CRACKING HYDROCARBON OILS; FUELS; GENERAL METHODS OF ORGANIC CHEMISTRY; LUBRICANTS; METALLURGY; MINERAL WAXES; ORGANIC CHEMISTRY; 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 relates to the cracking of hydrocarbons or other organic compounds. According to the invention there is provided a process for reducing coking on the metal wall of a reactor for cracking a hydrocarbon or other organic compound and on the metal wall of a heat exchanger placed subsequent to the cracking reactor, wherein the metal surface which comes into contact with the organic compound to be cracked is pretreated with steam comprising at least one silicon compound and at least one sulphur compound at between 300 and 1100 DEG C for 0.5 to 12 hours. The process according to the invention significantly reduces the coking on metal walls of cracking reactors and heat exchangers.