EP 0858494 A1 19980819 - PROCESS FOR REDUCING THE FORMATION OF CARBON DEPOSITS
Title (en)
PROCESS FOR REDUCING THE FORMATION OF CARBON DEPOSITS
Title (de)
VERFAHREN ZUR VERRINGERUNG VON KOHLENSTOFFABLAGERUNGEN
Title (fr)
PROCEDE DE REDUCTION DE LA FORMATION DE DEPOTS DE CARBONE
Publication
Application
Priority
- DE 19542219 A 19951031
- EP 9604728 W 19961031
- US 1140196 P 19960209
Abstract (en)
[origin: WO9716507A1] The invention relates to a process for reducing the formation of catalytically induced carbon deposits (coking) on the surfaces of components designed as heat exchangers, conduits or containers and made of a heat-resistant material that consists of a heat-resistant alloy containing Cr and at least one of the two elements Fe and Ni, whereas the components are exposed to hot carbonaceous process gases in process plants for producing chemical substances, especially plants for converting hydrocarbons or other substances containing C through thermal or catalytic cracking or through steam reforming or plants for producing a CO-rich reduction gas, wherein an Al-enrichment is carried out in the surface region by means of diffusion annealing in an atmosphere containing Al. Diffusion annealing is carried out in the temperature range of 900 to 1200 DEG C at least for a part of the treatment time in an atmosphere containing Cr, until a Cr-enrichment having a penetration depth of at least 20 mu m is achieved.
IPC 1-7
IPC 8 full level
B01J 19/00 (2006.01); C10G 9/16 (2006.01); C10G 9/20 (2006.01); C10G 11/20 (2006.01)
CPC (source: EP KR)
C10G 9/16 (2013.01 - EP KR); C10G 9/20 (2013.01 - KR); C10G 9/203 (2013.01 - EP)
Citation (search report)
See references of WO 9716507A1
Designated contracting state (EPC)
AT BE DE ES FI FR GB IT NL PT SE
DOCDB simple family (publication)
WO 9716507 A1 19970509; AT E189693 T1 20000215; AU 719778 B2 20000518; AU 7496296 A 19970522; CA 2236091 A1 19970509; CN 1201480 A 19981209; EP 0858494 A1 19980819; EP 0858494 B1 20000209; HU P9900820 A1 19990628; HU P9900820 A3 20010228; JP H11514681 A 19991214; KR 19990067141 A 19990816; NO 981943 D0 19980429; NO 981943 L 19980429; PL 326370 A1 19980914
DOCDB simple family (application)
EP 9604728 W 19961031; AT 96937304 T 19961031; AU 7496296 A 19961031; CA 2236091 A 19961031; CN 96198011 A 19961031; EP 96937304 A 19961031; HU P9900820 A 19961031; JP 51707297 A 19961031; KR 19980703087 A 19980428; NO 981943 A 19980429; PL 32637096 A 19961031