Reduced fouling of hydrocarbon oil
AssigneeGeneral Electric Company
InventorsGuangzhe Yu, Xiomara Price, Roberto M. Gutierrez, Anthony Fields, Bryan Crom, Guoliang Wang, Nimeshkumar Kantilal Patel, Xiaoan Xie
Life of this patent
Estimating the term…
Abstract
Antifoulant compositions and methods are used for inhibiting fouling on structural parts of a system exposed to a fluid hydrocarbon or petrochemical stream. Polyamine antifoulants are added to such systems. The polyamine antifoulants may be conjointly used with dispersants and/or fatty acids. The fatty acids have been found to reduce thermal degradation of the polyamine antifoulants.
Claims39
A method of reducing fouling on at least one structural part of a system exposed to a fluid hydrocarbon or petrochemical stream comprising adding a polyamine to said fluid hydrocarbon or petrochemical stream,
- wherein said polyamine is an alkylene polyamine represented by the formula:
- ZNH−R1nX
- wherein R1 is an alkylene group having from about 1 to about 10 carbon atoms;
- n is from about 1 to about 200,000;
- X is H, NH2, or a hydrocarbyl group having up to about 30 carbon atoms and Z is H, NH2 or a hydrocarbyl group having up to about 30 carbon atoms.
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5-8. (canceled)
10-12. (canceled)
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17-21. (canceled)
An antifoulant composition for inhibiting fouling on structural parts of a system exposed to a fluid hydrocarbon or petrochemical stream, said antifoulant composition comprising:
- (1) a polyamine and (2) a dispersant or a fatty acid,
- wherein said polyamine (1) is an alkylene polyamine represented by the formula
- ZNH−R1nX
- wherein R1 is an alkylene group having from about 1 to about 10 carbon atoms;
- n is from about 1 to about 200,000;
- X is H, NH2, or a hydrocarbyl group having up to about 30 carbon atoms and Z is H, NH2 or a hydrocarbyl group having up to about 30 carbon atoms, said polyamine having a linear, branched, or dendrimetric structure and said dispersant (2) is a member selected from group consisting of formaldehyde resins, alkyl phenol sulfides, Ca/Mg/Al salt of phosphonate phenates, polyalkylene succinimides and alkylene thiophosphonic acid esters.
26-27. (canceled)
An antifoulant composition for inhibiting fouling on structural parts of a system exposed to a fluid hydrocarbon or petrochemical stream, said antifoulant composition comprising a reaction product of i) a polyamine reactant and a ii) second reactant selected from a fatty acid, tall oil fatty acid, carboxylic acid or anhydride and an aldehyde,
- wherein said polyamine reactant i) is selected from polyethylenepolyamine, polyethylenimine, ethoxylated polyethylene polyamine, or polypropylenimine;
- and
- wherein said reactant ii) is tall oil fatty acid and i) is polyethylenimine.
29-30. (canceled)
A method of treating a crude oil to improve flow characteristics thereof comprising adding a polyamine to said crude oil, wherein said polyamine is an alkylene polyamine represented by the formula:
- ZNH−R1nX
- wherein R, is an alkylene group having from about 1 to about 10 carbon atoms;
- n is from about 1 to about 200,000;
- X is H, NH2, or a hydrocarbyl group having up to about 30 carbon atoms and Z is H, NH2 or a hydrocarbyl group having up to about 30 carbon atoms.
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44-46. (canceled)
A method of reducing metal content in a liquid hydrocarbonaceous or petrochemical media having iron therein, said method comprising contacting said liquid hydrocarbonaceous or petrochemical media with polyethylenimine
- wherein said liquid hydrocarbonaceous or petrochemical media is crude oil and said metal is iron, and
- wherein about 0.1-10,000 ppm of said PEI is added to said crude oil based upon one million parts by volume of said crude oil.
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54-55. (canceled)
57-59. (canceled)
Dependencies are inferred from the claim text.