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Publication numberUS2263366 A
Publication typeGrant
Publication dateNov 18, 1941
Filing dateJun 24, 1939
Priority dateJun 24, 1939
Publication numberUS 2263366 A, US 2263366A, US-A-2263366, US2263366 A, US2263366A
InventorsEdward B Peck, Peter J Gaylor
Original AssigneeStandard Oil Dev Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Suppressing coking on surfaces
US 2263366 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)

Patented Nov. 18, 1941 surrasssmo ooxme N summons Edward B. Peck, Elizabeth, and Peter J. Gaylor,

Union; N. J assignors to Standard Oil Development Company, a corporation of Delaware No Drawing. Application June 24, 1939,

Serial No. 281,052

2 Claims.

Thisinvention deals with a method for inhibiting or retarding the formation of coke and tarry matter upon heated surfaces in contact with organic materials.

Coking and carbonization difllculties have been encountered in industrial equipment such as cracking coils, vacuum distillation towers, combustion chambers of automotive engines, heat transfer equipment and the like. An object of the present invention is to retard or eliminate such coking or deposition of tarry materials which hinder and interfere with the operation of the equipmentemployed for commercial uses.

The present invention involves the coating of the surface in contact with the organic substance with a layer comprising zinc oxide. A large number of elements and compounds have been tried,

possible to obtain a homogeneous adherent coating of zinc oxide which will withstand vibration and mechanical handling without loss of the protective coating.

Such coatings may be applied to the metallic or other surfaces which have a tendency to coke or collect tarry deposits. Ferrous and nickel surfaces are especially noted for their coke-collecting tendencies. 1

Zinc oxide also tends to suppress the cracking of organic compounds, and in this respect it is valuable where cracking is to be avoided. Hence, it may be employed as a coating or ingredient for a catalyst employed in thermal reactions such as cracking, dehydrogenation, reforming, isomerization, polymerization, etc. Zinc compounds readbut it has been found that only zinc oxide ex 7 hibits a strong enough inhibiting effect agains;

coking to justify its commercial use. Although "it is possible to coat surfaces with zinc oxide by the use of paints, varnishes or lacquers. containing at least or preferably 50% or more zinc presence of air or oxygen for a limited length of time. The second method involves the treatment of the metal surface with zinc vapors in presence of reducing gases for such a period of time as to allow the zinc to penetrate into the metal to such an extent as to form a bonded surface, after which oxidation of the zinc surface is carried out as set forth above.

face orspraying the surface with the molten metal inv a reducing atmosphere followed by the The third method consists in galvanizing the metallic suring hydrocarbons.

oxidation procedure. With these processes, it is ily convertible into zinc oxide on oxidation may also be employed dissolved or dispersed in lubricants and fuels so as to prevent deposition of "made substantially free of carbon be coated with zinc oxide to obtain the best results.

We claim:

l. A method of thermally cracking hydrocarbons to produce gasoline in a reaction container made of metal containing iron and nickel which have coke forming characteristics, which comprises coating the'-internal surface of said metal reaction container with a homogeneous adherent protective coating of zinc oxide and then heating hydrocarbons in said reaction container having an internal zinc oxide coating to a cracking temperature for a sufficient time to effect the desired extent of cracking. I ,2. A method according to claim 1 wherein the .zinc is deposited as a thin film of metal on the internal surface of said reaction container and then is oxidized to form an adherent layer of zinc oxide before said container is used for crack- EDWARD B. PECK.


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US2419252 *Sep 27, 1943Apr 22, 1947Gen Motors CorpPrevention of seizure of metal parts
US2842470 *Feb 2, 1954Jul 8, 1958DegussaProcess for increasing the scaling resistance of titanium base metals
US3530013 *Aug 24, 1966Sep 22, 1970Cominco LtdProcess for the production of coloured coatings
US3630792 *Apr 28, 1969Dec 28, 1971Cominco LtdProcess for the production of colored coatings
US4343658 *Apr 14, 1980Aug 10, 1982Exxon Research & Engineering Co.Depositing tungsten or tantalum
US5575902 *Jul 1, 1994Nov 19, 1996Chevron Chemical CompanyHydrocarbons
US5593571 *Dec 19, 1994Jan 14, 1997Chevron Chemical CompanyTreating oxidized steels in low-sulfur reforming processes
US5674376 *Jun 7, 1995Oct 7, 1997Chevron Chemical CompanyLow sufur reforming process
US5676821 *Jun 7, 1995Oct 14, 1997Chevron Chemical CompanyCatalytic reforming of hydrocarbons; protective coating on furnace
US5723707 *Dec 12, 1994Mar 3, 1998Chevron Chemical CompanyDehydrogenation processes, equipment and catalyst loads therefor
US5849969 *Jun 7, 1995Dec 15, 1998Chevron Chemical CompanyHydrodealkylation processes
US5863418 *Feb 9, 1996Jan 26, 1999Chevron Chemical CompanyLow-sulfur reforming process
US5866743 *Jan 11, 1996Feb 2, 1999Chevron Chemical CompanyHydrodealkylation processes
US6139909 *Oct 31, 1996Oct 31, 2000Chevron Chemical CompanyMaintenance; reducing using mixture of hydrogen and hydrocarbons
US6258256Jan 4, 1994Jul 10, 2001Chevron Phillips Chemical Company LpCracking processes
US6274113Jul 28, 1999Aug 14, 2001Chevron Phillips Chemical Company LpOperating steam reforming in steam reforming reactor system at a first steam to carbon ratio; providing protective layer to portion of steam reforming reactor system to reduce by-products; operating steam reforming
US6419986Jan 10, 1997Jul 16, 2002Chevron Phillips Chemical Company IpSupplying getter; removal; fixing
US6548030Sep 10, 2001Apr 15, 2003Chevron Phillips Chemical Company LpProtective coating on interior surface of chemical reactor
US6551660Apr 18, 2001Apr 22, 2003Chevron Phillips Chemical Company LpMethod for removing reactive metal from a reactor system
US6602483Jun 21, 2001Aug 5, 2003Chevron Phillips Chemical Company LpIncreasing production in hydrocarbon conversion processes
US8173010May 19, 2006May 8, 2012Massachusetts Institute Of TechnologyMethod of dry reforming a reactant gas with intermetallic catalyst
USRE38532Dec 6, 1999Jun 8, 2004Chevron Phillips Chemical Company LpHydrodealkylation processes
U.S. Classification208/47, 428/469, 148/243, 208/48.00R, 427/343, 196/133, 585/920
International ClassificationB01J19/00
Cooperative ClassificationB01J19/0026, Y10S585/92
European ClassificationB01J19/00B4B