Title:
METHOD OF PROTECTING HEAT-RESISTANT ALLOY SURFACE CONTACTED WITH DRUG IN PYROLYSIS FURNACE FROM MAINLY COKE SETTLING AND FURNACE PROTECTED THEREBY
Document Type and Number:
Japanese Patent JPS57172982
Kind Code:
A
Abstract:
1. Method of protecting, especially against coking, refractory alloy surfaces in contact with the reagents within ovens, especially tubular ovens operating at an elevated temperature, e.g. for pyrolytically cracking hydrocarbons or other organic substances, wherein the refractory alloy used is of the iron-chrome-nickel type, characterized in that the components of the oven which are in contact with the reagents are made of an inner refractory alloy layer and an outer refractory alloy layer, said inner refractory alloy layer containing an oxide forming element, while said outer refractory alloy layer does not contain said oxide forming element, said layers being jointed without separation, by any convenient method, and in that said oxide forming element is used in an amount of about 6% (by weight with reference to the refractory alloy) so as to form a homogenous continuous catalytic layer, the said oxide forming metal being selected from the group comprising aluminium, titanium, zirconium, thornium or combinations thereof.
Inventors:
HUGO MICHEL (FR)
PONS FERNAND (FR)
THUILLIER JACQUES (FR)
MONNIER GILBERT (FR)
GRAMBES MICHEL (FR)
PAPAPIETRO MICHEL (FR)
PONS FERNAND (FR)
THUILLIER JACQUES (FR)
MONNIER GILBERT (FR)
GRAMBES MICHEL (FR)
PAPAPIETRO MICHEL (FR)
Application Number:
JP20601681A
Publication Date:
October 25, 1982
Filing Date:
December 19, 1981
Export Citation:
Assignee:
MANOIR FONDERIES ACIERIES (FR)
ELF FRANCE (FR)
ELF FRANCE (FR)
International Classes:
B01J19/00; B01J19/02; C10B43/00; C10G9/16; C10G9/20; F27D1/16; (IPC1-7): C10G9/16; F27D1/00
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