929results about "Treatment apparatus corrosion/fouling inhibition" patented technology

Graft polymers are used as gas hydrate inhibitors.

The present invention provides a method for reducing fouling, including particulate-induced fouling, in a hydrocarbon refining process including the steps of providing a crude hydrocarbon for a refining process; adding at least one polyalkyl succinic anhydride derivative additive disclosed herein. The additive can be complexed with a boronating agent, such as boric acid, to yield a boron-containing polyalkyl succinic anhydride derivative.

Provided is a process for the supercritical upgrading of petroleum feedstock, wherein the process includes the use of a start-up agent, wherein the use of the start-up agent facilitates mixing of the petroleum feedstock and water, thereby reducing or eliminating the production of coke, coke precursor, and sludge.

The present invention provides a method, an apparatus and chemical products for treating petroleum equipment wherein a fluid is flowing, preferably of the hydrocarbon type, and wherein treating is performed by establishing a closed or semi-closed flow circulation loop, during the normal production operations of the equipment. The treatment can refer to the cleaning of equipment, to yield improvement as compared to normal run conditions and/or to a reduction of coke formation and/or to coke removal on catalysts.

A process for producing a gasoline with a low sulphur content comprises: separating a sulphur-containing gasoline into a light fraction and a heavy fraction, hydrodesulphurising the light gasoline on a nickel-based catalyst, hydrodesulphurising the heavy fraction on a catalyst comprising at least one group VIII metal and/or at least one group VIB metal, and mixing the desulphurised fractions.

This invention provides a method of treating a dry or processed fluid pipe line susceptible to the build-up of iron sulfide deposits by complexing the iron sulfide in the pipe lines. The method of the present invention introduces the composition on a continuous or a batch basis to a gas pipe line. The composition is made of a solution of 1) water, 2) [tetrakis(hydroxymethyl)phosphonium]sulfate or chloride, and 3) a soluble ammonium salt, such as ammonium chloride or the like.

The invention discloses a composite inhibiter and a preparation method and an application thereof. The composite inhibitor is a composition with the components and contents being as follows: (A) 10wt%-60wt% of auaternary ammonium bis-imidazoline; (B) 1wt%-10wt% of pyridine derivatives; (C) 1wt%-30wt% of corrosion inhibition assistant; and (D) 10wt%-50wt% of solvent. The inhibitor in the invention has fine effect on preventing low-temperature lightweight oil part equipment from being corroded in an oil refinery.

Disclosed herein are cleaner/corrosion inhibiting compositions useful in applications relating to the production, transportation, storage, and separation of crude oil and natural gas. Also disclosed herein are methods of using the compositions as cleaners/corrosion inhibitors, particularly in applications relating to the production, transportation, storage, and separation of crude oil and natural gas.

Methods of separating components of a mixture, such as crude oil, are disclosed which increase the yield of individual components while decreasing the yield of residue. In one method, a heated mixture is fed to a column, a vapor stream is withdrawn from the column and separated, and a portion of the vapor stream is recycled back to the column. In another method, a mixture is separated into streams composed substantially of components having light, intermediate or heavy molecular weight and/or low, intermediate or high boiling point, respectively, and the streams are fed into the column at different positions. In both methods, individual light, intermediate and/or heavy molecular weight and/or low, intermediate and/or high boiling point component streams are then selectively withdrawn from the column.

The invention discloses a water soluble corrosion inhibitor, the preparation method and the application of the corrosion inhibitor, solving the defect of narrow application range of the corrosion inhibitor pH in the prior art; the water soluble corrosion inhibitor is composed of 20-70 weight proportion of imidazolines derivates, 1-10 weight proportion of pyridine derivates, 1-20 weight proportion of corrosion inhibition auxiliary agent and 10-50 weight proportion of solvent, based on the total weight of the corrosion inhibitor as the reference. The water soluble corrosion inhibitor in the invention has corrosion inhibition effect on the metal material in the medium with wide PH variation range (pH equals to 1-10) and good metal surface film formation property.

The invention relates to a butter inhibitor used for an ethylene unit alkaline washing tower. Problems of the background technology are solved, so the butter inhibitor has the performance of oxidation resistance, polymerization inhibition, cleanness, dispersion, metallic ion passivation and a better inhibition effect. The butter inhibitor is prepared from the following raw materials of: 1 to 30 percent of antioxidant, 5 to 40 percent of polymerization retarder, 2 to 30 percent of dispersant, 5 to 25 percent of metallic ion passivating agent and the balance of solvent; and the butter inhibitor is prepared by heating, uniformly mixing and cooling the materials.

The present disclosure describes a method and system for estimating the onset of salt formation in an overhead fluid system. The method may include measuring parameters of a process stream by collecting data from one or more sensor arrays on an overhead line, such as from a distillation column, and then estimating the onset of salt formation corrosion using the data from the sensor arrays. The method may be implemented in real-time. The method may include transmitting data to monitoring facilities and/or sending instructions to alarms and/or regulators. Also described is a system for performing the method.

A method of dispersing, dissolving, or reducing the viscosity of hydrocarbon foulants including heavy oil, tars, asphaltenes, polynuclear aromatic hydrocarbons, coke, polymers, light oil, oxidized hydrocarbon and thermal decomposition products, and the like in fluids in contact with hydrocarbon processing equipment comprising contacting the foulant with an effective amount of a halogen-free organic solvent having a density greater than water at the processing temperature.

Compositions comprising at least one C₄-C₃₀ olefin or oxidation product thereof and kerosene or an aromatic solvent are particularly effective for use in removing asphaltene and asphaltene-containing organic deposits and in preventing or reducing the precipitation and deposition of asphaltenes from hydrocarbon fluids. When added to heavy oils comprising asphaltenes, alone or in combination with dispersants and further inhibitors, the invented compositions lower viscosity and pour point, and aid in preventing asphaltene precipitation during transport and in combustion.

A high solvency dispersive power (HSDP) crude oil is added to a blend of incompatible oils to proactively address the potential for fouling heat exchange equipment. The HSDP component dissolves asphaltene precipitates and maintains suspension of inorganic particulates before coking affects heat exchange surfaces. An HSDP oil is also flushed through heat exchange equipment to remove any deposits and/or precipitates on a regular maintenance schedule before coking can affect heat exchange surfaces.

Disclosed herein is a method involving the steps of (a) precipitating an amount of asphaltenes from a liquid sample of a first hydrocarbon-containing feedstock having solvated asphaltenes therein with one or more first solvents in a column; (b) determining one or more solubility characteristics of the precipitated asphaltenes; (c) analyzing the one or more solubility characteristics of the precipitated asphaltenes; and (d) correlating a measurement of feedstock reactivity for the first hydrocarbon-containing feedstock sample with a mathematical parameter derived from the results of analyzing the one or more solubility characteristics of the precipitated asphaltenes.

The invention provides oil slurry scale inhibitor which is used for inhibiting an oil slurry system from being coked, increasing steam yield of a steam generating system, and reducing the dismounting and cleaning frequency of an oil slurry heat exchanger, as well as a preparation method of the oil slurry scale inhibitor. The scale inhibitor mainly comprises a purification dispersant, an antioxidant, a polymerization inhibitor, an emulsifier, a surface active agent and a co-solvent. The scale inhibitor adopting the proportion can be used for reducing the oil slurry specific gravity, viscosity and external throwing amount, effectively inhibiting the devices including the oil slurry system, a pipeline, a heat exchanger and the like from being coked, and ensuring the safe and stable operation of the device. Meanwhile, the steam generating amount is increased and the yield of light oil is improved.

A method for determining asphaltene stability in a hydrocarbon-containing material having solvated asphaltenes therein is disclosed. The method involves the steps of: (a) precipitating an amount of the asphaltenes from a liquid sample of the hydrocarbon-containing material with an alkane mobile phase solvent in a column; (b) dissolving a first amount and a second amount of the precipitated asphaltenes by gradually and continuously changing the alkane mobile phase solvent to a final mobile phase solvent having a solubility parameter at least 1 MPa^0.5 higher than the alkane mobile phase solvent; (c) monitoring the concentration of eluted fractions from the column; (d) creating a solubility profile of the dissolved asphaltenes in the hydrocarbon-containing material; and (e) determining one or more asphaltene stability parameters of the hydrocarbon-containing material.

A composition and method of inhibiting corrosion caused by naphthenic acid in fluids includes using a combination of a thiophosphorus compound and a hydrogen sulfide scavenging compound. The hydrogen sulfide scavenging compound significantly enhances the performance of the thiophosphorus compound and may be included at relatively low levels in the composition. The treatment may be applied to fluids including crude oils and lighter fractions thereof.

This invention relates to corrosion inhibitor additive combinations giving long acting performance in oxygenated gasoline blends comprising either low carbon number (<3) or high carbon number (greater than or equal to 4) alcohols or mixtures thereof and adapted for use in fuel delivery systems and internal combustion engines. The invention also is concerned with a process for conferring anti-corrosion properties to oxygenates in gasoline fuel mixtures wherein the oxygenate comprises biologically-derived butanol.

A process for refining crude oil can be controlled to mitigate fouling by deploying a refractive index probe at a location suitable for making a crude oil stability determination, wherein the crude oil stability determination is relevant to controlling the refining process; making a measurement of crude oil stability; and then controlling the process for refining crude oil by maintaining the process or implementing a change to the process, based upon the determination of crude oil stability. This concept can also be applied to transporting, blending, and storing crude oil.

The invention discloses a scale inhibitor, in particular a scale inhibitor for a catalytic cracking slurry system, which is characterized by being a composition consisting of 2 to 6 weight percent of antioxidant, 2 to 18 percent of polymerization inhibitor, 10 to 25 percent of detergent dispersant, 1 to 5 percent of metal passivator, 20 to 45 percent of dispersant and 16 to 40 percent of solvent. The scale inhibitor for the catalytic cracking slurry system has high pertinency and desirable scale inhibiting effect, and can help to solve the sintering and scaling problems of the slurry system and prolong the operation period of the device. The dosage of scale inhibitor is small, so the scale inhibitor is economic. The scale inhibitor can solve the scaling problem of a catalytic cracking device effectively and is the first scale inhibitor for the catalytic cracking slurry system. Thus, the scale inhibitor has high promotion and application values and a very good market prospect.

The present invention provides a method for reducing fouling, including particulate-induced fouling, in a hydrocarbon refining process including the steps of providing a crude hydrocarbon for a refining process and adding an antifouling agent containing a polymer base unit and a polyamine group to the crude hydrocarbon. The antifouling agent can be obtained by reacting an epoxidation reagent with a vinyl-terminated polymer, such as polypropylene or poly(ethylene-co-propylene), to form a terminal epoxy group, followed by reacting a polyamine with the epoxy group.

The present invention is a method for mitigating the fouling from thermally cracked oils by minimizing the residence time at the temperature when the fouling is highest.