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Additives for reducing coking of furnace tubes

a technology of additives and furnace tubes, applied in the field of additives, can solve the problems of increasing operational costs and increasing energy costs, and achieve the effects of reducing furnace fouling, reducing furnace fouling comprising sulfurized oil, and reducing furnace fouling

Inactive Publication Date: 2011-02-24
BAKER HUGHES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0007]In one aspect the invention is a process for reducing furnace fouling comprising treating a furnace feed stream with an antifouling agent wherein the antifouling agent comprises sulfurized oil.
[0008]In another aspect, the invention is an additive useful for reducing furnace fouling comprising sulfurized oil.
[0009]In still another aspect the invention is an admixture of a furnace feed material and an additive useful for reducing furnace fouling comprising sulfurized oil. Exemplary of such an admixture is a hydrocarbon feed stream for a coking or visbreaking process and a sulfurized oil antifouling additive.

Problems solved by technology

The deposit of any insulating material on the heat exchange surfaces of the flow path can be undesirable in that it can result in increased energy costs as temperatures are increased to overcome the effect of the insulating deposits and increase operational costs when the furnaces are shut down for periodic cleaning of the heat exchanging surfaces.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

examples

[0029]The following examples are provided to illustrate the present invention. The examples are not intended to limit the scope of the present invention and they should not be so interpreted. Amounts are in weight parts or weight percentages unless otherwise indicated.

Experimental High Temperature Fouling Test (HTFT) Procedure

[0030]Samples of heated coker feed were poured out in pre-weighed 100 mL beakers. The amount of the sample was weighed and recorded. Prior to a HTFT run, the preweighed beaker with coker feed was heated to about 400° F. (204° C.). The base of a Parr pressure vessel was preheated to about 250° F. (121° C.).

[0031]The HTFT furnace was heated to the desired temperature, normally 890° F. (477° C.) to 950° F. (510° C.), dependent on the furnace outlet temperature in which the coker feed was processed. When the coker sample, autoclave base, and HTFT furnace had all reached the appropriate test temperature, the sample beaker was placed into the autoclave base and the a...

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PUM

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Abstract

Fouling of hot furnace surfaces in selected refinery processes can be stopped or at least mitigated using an antifouling agent. The antifouling agents include sulfurized oil and may include other components selected from the group consisting of magnesium and aluminum overbases, a-olefin copolymers, and combinations thereof. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. 37 CFR 1.72(b)

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application claims priority from U.S. Provisional Patent Application Ser. No.: 61 / 235957, filed Aug. 21, 2009.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to additives useful for reducing fouling in furnaces. The present invention particularly relates to sulfur based additives useful for reducing fouling in furnaces.[0004]2. Background of the Art[0005]Petrochemical plants, which include both Chemical Production Installations as well as Oil Refineries, are known to employ two basic types of furnaces. The first of these is a steam cracker furnace. Steam crackers are used in applications including the production of ethylene. The second of these is a “steam reformer” furnace, which can be used to make hydrogen. Both types of furnaces include a number of tubes, generally arranged vertically, that form a continuous flow path, or coil, through the furnace. The flow path or coil includes an in...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C10G7/10
CPCC10G2300/4075C10G75/04
Inventor STARK, JOSEPH L.FALKLER, THOMAS J.
Owner BAKER HUGHES INC
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