摘要:
The present invention provides a method for decreasing the Conradson carbon ("Concarbon") number of petroleum feedstreams by passing an electric current through a mixture of a petroleum stream, typically having a Conradson carbon residue of at least about 0.1% and an aqueous electrolysis medium at a pH and cathodic voltage for a time sufficient to decrease the Conradson carbon number of the petroleum stream. The electrolysis medium contains quaternary carbyl or hydrocarbyl onium salts; inorganic hydroxides such as NaOH or KOH, or mixtures thereof. A cathodic voltage of 0 V to -3.0 V vs. Saturated Calomel Electrode (SCE) and a pH of 6-14, preferably 7 to 14, more preferably above 7 to 14 are used.The invention has utility for converting less economically desirable refinery feeds to feeds that are more valuable.
摘要:
In accordance with this invention, there is provided a lubricating composition comprising a major amount of an oil of lubricating viscosity and a minor amount of an additive having the formula MoL.sub.4 wherein L is a ligand selected from thioxanthates and mixtures thereof and, in particular, thioxanthates having a sufficient number of carbon atoms to render the additive soluble in the oil. In general, the thioxanthate ligand, L, will have from about 2 to about 30 carbon atoms.
摘要:
This invention provides a process for separating solute material from an algal cell feed stream. The algal cell feed stream, which contains the solute material, can be introduced into on portion of a mixer-settler vessel, and a solvent feed stream can be introduced into another portion of the vessel to mix with the algal cell feed stream, with a goal of separating at least a portion of the solute material from the algal feed stream.
摘要:
Targeted application of anti-fouling mechanisms in a heat exchange system produces higher rates of energy recovery. The anti-fouling mechanisms with high mitigation rates can be deployed at only the hottest portions of a pre-heat train that experience the highest rates of fouling and heat loss. In application, bundles of corrosion resistant smoothed tubes are deployed in the late pre-heat train to significantly reduce the formation of harder deposits. Vibration can be used as an adjunct approach in conjunction with the corrosion resistant, smooth tubes, or deployed alone on existing bundles. The use of high performing, more durable exchangers in select locations justifies the increased cost of these components.
摘要:
A heat transfer component that is resistant to both corrosion and fouling is disclosed having a heat exchange surface formed from a silicon containing steel composition including an alloy and a non-metallic film formed on a surface of the alloy. The alloy is formed from the composition η, θ, and τ, in which η is a metal selected from the group consisting of Fe, Ni, Co, and mixtures thereof, θ is Si, and τ is at least one alloying element selected from the group consisting of Cr, Al, Mn, Ti, Zr, Hf, V, Nb, Ta, Mo, W, Sc, La, Y, Ce, Ru, Rh, Ir, Pd, Pt, Cu, Ag, Au, Ga, Ge, As, In, Sn, Sb, Pb, B, C, N, P, O, S and mixtures thereof. The non-metallic film comprises sulfide, oxide, carbide, nitride, oxysulfide, oxycarbide, oxynitride and mixtures thereof. The surface roughness of the heat transfer component is less than 40 micro inches.
摘要:
A method and device for reducing sulfidation corrosion and depositional fouling in heat transfer components within a refining or petrochemical facility is disclosed. The heat transfer components are formed from a corrosion and fouling resistant steel composition containing a Cr-enriched layer and having a surface roughness of less than 40 micro inches (1.1 μm).
摘要:
The instant invention relates to a method for producing low-sulfur, low-nitrogen diesel boiling range products involving contacting a diesel boiling range feedstream with an acidic solution to selectively remove heterocyclic nitrogen-containing compounds before hydrotreating.
摘要:
The instant invention relates to a multi-stage process for producing low-nitrogen hydrocarbonaceous boiling range products involving contacting a hydrocarbonaceous feedstream with an acidic solution to selectively remove heterocyclic nitrogen-containing compounds, recovering the used sulfuric acid solution, and cascading the used sulfuric acid solution to another downstream contacting stage.
摘要:
The invention relates to a composition and method for treating liquid hydrocarbons in order to remove acidic impurities, such as mercaptans, particularly mercaptans having a molecular weight of about C4 (C4H10S=90 g/mole) and higher, such as recombinant mercaptans.
摘要翻译:本发明涉及一种用于处理液体烃以除去酸性杂质的组合物和方法,例如硫醇,特别是分子量约为C 4的硫醇(C 4 H 4) H 10 S = 90克/摩尔)和更高,如重组硫醇。
摘要:
The invention relates to a method for treating naphtha, such as catalytically cracked naphtha, in order to remove acidic impurities, such as mercaptans. In particular, the invention relates to a method for mercaptans having a molecular weight of about C4 (C4H10S=90 g/mole) and higher, such as recombinant mercaptans.