Chemical products for surface protection
Some implementations of the present disclosure prevent, reduce or at least slow equipment fouling using passivation as a treatment prior to contacting metallic components with hydrocarbon containing fluid, that is, an environment where fouling occurs. For example, one implementation includes a method of passivating heat exchangers in a SAGD process or system using the compositions and compounds of the present disclosure. The composition may be applied to a component prior to its first inclusion in an online system or following placing the system offline for maintenance. The composition may be used to treat metallic equipment surface(s), for example, via contacting them with a suspension or solution of the composition described herein, prior placing the system online. The method may further include treatment of the process fluid, for example, via injection or batch treatment of the composition with the compositions described herein into the process fluid.
1. A composition, comprising:
a surfactant;
a corrosion inhibitor;
a solvent; and
at least one compound selected from the group consisting of:
and optionally salts thereof,
and optionally salts thereof, and combinations thereof.
2. The composition of claim 1 , further comprising:
an additive selected from the group consisting of: acids, film forming agents, freeze point depressors, scale inhibitors, and wetting agents.
3. The composition of claim 1 , further comprising a scale inhibitor selected from the group consisting of: phosphate esters, acetylenic alcohols, fatty acids and/or alkyl-substituted carboxylic acids and anhydrides, quaternary amines, sulfur-oxygen phosphates and/or polyphosphate esters, and combinations thereof.
4. The composition of claim 1 , wherein the surfactant is selected from the group consisting of: quaternary alkyl amines, tetrabutylammomium acetate, tetrabutylammonium bromide, tetrabutylammonium nitrate, sodium lauryl sulfate, sodium lauryl ether sulfate, polyamines, as polymers or copolymers comprising ethylene oxide, propylene oxide, alkoxylates of alkylphenol or alkylphenol based resins, and combinations thereof, and combinations thereof.
5. The composition of claim 1 , wherein the solvent is selected from the group consisting of: formamide, propylene carbonate, tetrahydrofuran, alcohols, glycols, methanol, isopropanol, ethanol, acetone, toluene, xylene, monobutyl ether, dimethoxyethane, diglyme, naphtha, dimethyl amine, n-methyl pyrrolidone, biodegradable solvents, or renewable solvents, and mixtures thereof alone or without water.
6. A method of treating fouling of a metallic component, the method comprising:
contacting a metallic component with the composition of claim 1 ; and
contacting the metallic component with a hydrocarbon-containing process fluid stream.
7. The method of claim 6 , wherein contacting the metallic component comprises continuously injecting the composition into the process fluid stream during operation.
8. The method of claim 6 , wherein the metallic component is a heat exchanger.
9. The method of claim 6 , wherein hydrocarbon-containing process fluid stream is a steam assisted oil recovery system.
10. The method of claim 7 , wherein between about 1 ppm and about 1000 ppm of the composition is injected into the process fluid stream.
11. The method of claim 10 , wherein between about 5 ppm and about 750 ppm of the composition is injected into the process fluid stream.