Erosion Resistant Alloy for Thermal Cracking Reactors

Patent metadata

Field	Value
Publication number	US-2022017827-A1
Application number	US-201917311132-A
Country	US
Kind code	A1
Filing date	Dec 13, 2019
Priority date	Dec 20, 2018
Publication date	Jan 20, 2022
Grant date	—

Abstract

Reactor components formed using an erosion resistant alloy having desirable high temperature mechanical strength are provided. The erosion resistant components can include, but are not limited to, tubes, re-actors walls, fittings, and/or other components having surfaces that can be exposed to a high temperature reaction environment in the presence of hydrocarbons and/or that can provide pressure containment functionality in processes for upgrading hydrocarbons in a high temperature reaction environment. The erosion resistant alloy used for forming the erosion resistant component can include 42.0 to 46.0 wt. % nickel; 32.1 to 35.2 wt. % um; 0.5 to 2.9 wt. % carbon; 0 to 2.0 wt. % titanium; 0 to 4.0 wt. % tungsten, and iron, with at least one of titanium and tungsten is present in an amount of 1.0 wt. % or more. The iron can correspond to the balance of the composition. Optionally, the erosion resistant alloy can provide further improved properties based on the presence of at least one strengthening mechanism within the alloy, such as a carbide strengthening mechanism, a solid solution strengthening mechanism, a gamma prime strengthening mechanism, or a combination thereof.

First claim

What is claimed is:

1 . A furnace component composed of an erosion resistant alloy, the erosion resistant alloy comprising a) 42.0 to 46.0 wt. % nickel (Ni); b) 32.1 to 35.2 wt. % chromium (Cr); c) 0.5 to 2.9 wt. % carbon (C); d) 0 to 2.0 wt. % titanium (Ti); e) 0 to 4.0 wt. % tungsten (W); 0 balance iron (Fe), wherein the erosion resistant alloy comprises 1.0 wt. % or more of at least one of Ti and W.

2 . The furnace component of claim 1 , wherein the erosion resistant alloy comprises at least one strengthening mechanism, the at least one strengthening mechanism comprising:
(i) a carbides strengthening mechanism, wherein the erosion resistant alloy comprises carbides of at least one of titanium, tungsten, and chromium; (ii) a gamma prime (γ′) strengthening mechanism, wherein the erosion resistant alloy comprises Ni 3 Ti; (iii) a solid solution strengthening mechanism; or (iv) a combination of two or more of (i), (ii), and (iii).

3 . The furnace component of claim 1 , wherein the erosion resistant alloy is substantially free of aluminum.

4 . The furnace component of claim 1 , wherein the erosion resistant alloy comprises 14 wt. % or more of Fe.

5 . The furnace component of claim 1 , wherein the furnace component comprises a feed conduit, a dilution steam conduit, a convection tube, a radiant tube, a radiant coil, a pipe, a transfer line exchanger, a quench zone conduit, or a combination thereof.

6 . The furnace component of claim 1 , wherein the furnace component comprises a steam cracker furnace component.

7 . The furnace component of 6 claim 1 , wherein the furnace component comprises 1.0 wt. % carbon or more.

8 . The furnace component of claim 1 , wherein the furnace component comprises a monolithic structure.

9 . A method for producing a furnace component, comprising:
forming a furnace component comprising an erosion resistant alloy via hot-isostatic-pressing, sintering, centrifugal casting, static casting, extrusion, forging, rolling, joining, machining, or a combination thereof, wherein the erosion resistant alloy comprises a) 42.0 to 46.0 wt. % nickel (Ni); b) 32.1 to 35.2 wt. % chromium (Cr); c) 0.5 to 2.9 wt. % carbon (C); d) 0 to 2.0 wt. % titanium (Ti); e) 0 to 4.0 wt. % tungsten (W); f) balance iron (Fe), wherein the erosion resistant alloy comprises 1.0 wt. % or more of at least one of Ti and W

10 . The method of claim 9 , wherein the erosion resistant alloy comprises at least one strengthening mechanism, the at least one strengthening mechanism comprising:
(i) a carbides strengthening mechanism, wherein the erosion resistant alloy comprises carbides of at least one of titanium, tungsten, and chromium; (ii) a gamma prime (γ′) strengthening mechanism, wherein the erosion resistant alloy comprises Ni 3 Ti; (iii) a solid solution strengthening mechanism; or (iv) a combination of two or more of (i), (ii), and (iii).

11 . The method of claim 9 , wherein forming the furnace component comprises:
forming a billet comprising the erosion resistant alloy; and forming the furnace component from the billet.

12 . The method of claim 9 , wherein forming the furnace component comprises forming the furnace component via hot-isostatic pressing.

13 . The method of claim 9 , wherein the erosion resistant alloy is substantially free of aluminum.

14 . The method of claim 9 , wherein the erosion resistant alloy comprises 14 wt. % or more of Fe.

15 . The method of claim 9 , wherein the furnace component comprises 1.0 wt. % carbon or more.

16 . The method of claim 9 , wherein the furnace component comprises a feed conduit, a dilution steam conduit, a convection tube, a radiant tube, a radiant coil, a pipe, a transfer line exchanger, a quench zone conduit, or a combination thereof.

17 . The method of claim 9 , wherein the furnace component comprises a monolithic structure.

18 . A method for producing olefins, comprising pyrolyzing a hydrocarbon feed in a pyrolysis environment comprising a furnace component, the furnace component comprising an erosion resistant alloy,
wherein the erosion resistant alloy comprises a) 42.0 to 46.0 wt. % nickel (Ni); b) 32.1 to 35.2 wt. % chromium (Cr); c) 0.5 to 2.9 wt. % carbon (C); d) 0 to 2.0 wt. % titanium (Ti); e) 0 to 4.0 wt. % tungsten (W); f) balance iron (Fe), wherein the erosion resistant alloy comprises 1.0 wt. % or more of at least one of Ti and W

19 . The method of claim 18 , wherein the erosion resistant alloy comprises at least one strengthening mechanism, the at least one strengthening mechanism comprising:
(i) a carbides strengthening mechanism, wherein the erosion resistant alloy comprises carbides of at least one of titanium, tungsten, and chromium; (ii) a gamma prime (γ′) strengthening mechanism, wherein the erosion resistant alloy comprises Ni 3 Ti; (iii) a solid solution strengthening mechanism; or (iv) a combination of two or more of (i), (ii), and (iii).

20 . The method of claim 18 , wherein the method of pyrolyzing a hydrocarbon feed comprises steam cracking, or wherein the pyrolysis environment comprises a steam cracking environment, or a combination thereof.

21 . The method of claim 18 , wherein the erosion resistant alloy is substantially free of aluminum.

22 . The method of claim 18 , wherein the erosion resistant alloy comprises 14 wt. % or more of Fe.

23 . The method of claim 18 , wherein the furnace component comprises 1.0 wt. % carbon or more.

24 . The method of claim 18 , wherein the furnace component comprises a feed conduit, a dilution steam conduit, a convection tube, a radiant tube, a radiant coil, a pipe, a transfer line exchanger, a quench zone conduit, or a combination thereof.

25 . The method of claim 18 , wherein the furnace component comprises a monolithic structure.

Assignees

• Exxonmobil Chemical Patents Inc

Inventors

• Perdomo Jorge J
• Morales Ivan A
• Chun Changmin

Classifications

• C22C30/00

  Alloys containing less than 50% by weight of each constituent · CPC title

• C10G9/203 Primary

  chemical composition of the tubes · CPC title

• C22C19/053

  with the maximum Cr content being at least 30% but less than 40% · CPC title

• C22C19/05

  with chromium · CPC title