摘要:
The invention relates to a method for monitoring a process for refining a feedstock of hydrocarbons, in which: a) a signal representative of the transverse relaxation time of the different entities of an effluent resulting from said refining process, in particular an effluent comprising solid entities, is acquired by proton NMR, b) the signal measured is modeled using a mathematical function comprising several components, each component corresponding to a dynamic range of the entities of said effluent, c) the following are extracted from each of the components of the mathematical function: the transverse relaxation time of each of the components, the intensity of each of the components, d) a value of parameter characteristic of said effluent is determined from at least one intensity determined in stage c), e) a signal for controlling the refining process is generated as a function of said characteristic parameter.
摘要:
A process for upgrading oil including optionally pre-treating a heavy oil including at least one dissolved gas, asphaltenes, water, and mineral solids; reducing at least one dissolved gas content from said heavy oil, optionally further reducing water content from said heavy oil; adding a paraffinic solvent to said heavy oil, at a predetermined paraffinic solvent:heavy oil ratio, facilitating separation of asphaltenes, water, and mineral solids from the heavy oil resulting in a de-asphalted or partially de-asphalted oil (“DAO”)-paraffinic solvent stream, comprising a low asphaltenes content DAO-paraffinic solvent stream and an asphaltenes-mineral solids-paraffinic solvent-water slurry stream; optionally separating the paraffinic solvent and water from the asphaltenes-mineral solids-paraffinic solvent-water slurry stream; optionally separating the DAO-paraffinic solvent stream into a paraffinic solvent rich stream and a DAO stream; and optionally adding diluent to the DAO stream resulting in transportable oil.
摘要:
This invention relates to systems and methods for catalytic steam cracking of non-asphaltene containing heavy hydrocarbon fractions. The method enables upgrading heavy hydrocarbons to hydrocarbons capable of being transported through pipelines and/or a pretreated step before further treatment in an upgrading refinery, including the steps of separating the heavy hydrocarbon mixture into a light fraction, a full gasoil fraction and a vacuum residue fraction with or without at least partial reduction or asphaltenes; adding a catalyst to the full gasoil and/or to the blend of this with a reduced asphaltenes fraction and subjecting the catalyst-full gasoil and/or deasphalted oil fraction to catalytic steam cracking to form an effluent stream; separating the effluent stream into a gas stream and a liquid stream; and mixing the liquid stream with the light fraction and the vacuum residue fraction to form an upgraded oil. The system includes hardware capable of performing the method.
摘要:
Methods are provided for processing deasphalted gas oils derived from thermally cracked resid fractions to form Group I, Group II, and/or Group III lubricant base oils. The yield of lubricant base oils (optionally also referred to as base stocks) can be increased by thermally cracking a resid fraction at an intermediate level of single pass severity relative to conventional methods. By performing thermal cracking to a partial level of conversion, compounds within a resid fraction that are beneficial for increasing both the viscosity and the viscosity index of a lubricant base oil can be retained, thus allowing for an improved yield of higher viscosity lubricant base oils from a thermally cracked resid fraction.
摘要:
The invention provides synergistic biofuel blends comprising a petroleum distillate and two or more fatty acid alkyl ester-containing biofuels. Methods for making synergistic biofuel blends are also provided.
摘要:
The present invention provides a hydrodesulfurization catalyst that exhibits a high desulfurization activity when used in hydrotreatment of hydrocarbon oil, in particular straight-run gas oil. The catalyst includes at least one type of metal component selected from Groups VIA and VIII in the periodic table, supported on a silica-titania-alumina support where the total of the diffraction peak area indicating the crystal structure of anatase titania (101) planes and the diffraction peak area indicating the crystal structure of rutile titania (110) planes is ¼ or less of the diffraction peak area indicating the aluminum crystal structure ascribed to γ-alumina (400) planes, as measured by X-ray diffraction analysis. The catalyst has (a) a specific surface area (SA) of 150 m2/g or greater, (b) a total pore volume (PVo) of 0.30 ml/g or greater, (c) an average pore diameter (PD) of 6 to 15 nm (60 to 150 Å), and (d) the ratio of the pore volume (PVp) of pores having diameters within ±30 percent of the average pore diameter (PD) being 70 percent or greater of the total pore volume (PVo).
摘要:
Undesirable gas oil components are selectively cracked or coked in the coking vessel by injecting an additive into the vapors of traditional coking processes in the coking vessel prior to fractionation. The additive contains catalyst(s), seeding agent(s), excess reactant(s), quenching agent(s), carrier(s), or any combination thereof to modify reaction kinetics to preferentially crack or coke these undesirable components that typically have a high propensity to coke. These undesirable gas oil components are often precursors to coke in the coking process and as coke on catalyst in downstream catalytic cracking processes. These components often contain elements that cause catalyst deactivation in downstream catalytic units, as well. Exemplary embodiments of the present invention also provide methods to control the (1) coke crystalline structure and (2) the quantity and quality of volatile combustible materials (VCMs) in the resulting coke. That is, by varying the quantity and quality of the catalyst, seeding agent, and/or excess reactant the process may effect the quality and quantity of the coke produced, particularly with respect to the crystalline structure (or morphology) of the coke and the quantity & quality of the VCMs in the coke. For example, anode grade, sponge coke production may be maintained in delayed cokers, despite higher levels of heavy, sour crudes in the refinery crude blend. In addition, the quantity and quality of the VCMs may be controlled to address the needs and specifications for certain coke markets. Pet coke from this process may have unique characteristics with substantial utility.
摘要:
The invention relates to the integration of a process for hydrotreatment of distillates (light and/or middle), that operates under a hydrogen partial pressure of 0.5 to 6.0 MPa, with a process for hydrotreatment/hydroconversion of middle and/or heavy distillates that operates at a hydrogen partial pressure that is at least 4.0 MPa higher than the hydrogen partial pressure of the process for hydrotreatment of distillates (light and/or middle). The integration resides in the use of the hydrogen-rich gas, obtained from the hydrotreatment/hydroconversion effluents, in the process for hydrotreatment of distillates (light and/or middle) and in the adjustment of the pressure level of this hydrogen-rich gas removed from the hydrotreatment/hydroconversion. This invention makes it possible to considerably reduce the net consumption of make-up hydrogen in the process for hydrotreatment of distillates (light and/or middle).
摘要:
A process for the hydroprocessing of a gas oil (GO) hydrocarbon feed to provide high yield of a diesel fraction. The process comprises a liquid-full hydrotreating reaction zone followed by a liquid-full hydrocracking reaction zone. A refining zone may be integrated with the hydrocracking reaction zone. Ammonia and other gases formed during the hydrotreatment are removed in a separation step prior to hydrocracking.
摘要:
A process of upgrading a highly aromatic hydrocarbon feedstream comprising (a) contacting a highly aromatic hydrocarbon feedstream, wherein, a major portion of the feedstream has a boiling range of from about 300° F. to about 800° F., under catalytic conditions with a catalyst system, containing a hydrotreating catalyst and a hydrogenation/hydrocracking catalyst in a single stage reactor system, wherein the active metals in the hydrogenation/hydrocracking catalyst comprises from about 5%-30% by weight of nickel and from about 5%-30% by weight tungsten; and (b) wherein at least a portion of the highly aromatic hydrocarbon feedstream is converted to a product stream having a boiling range within jet or diesel boiling ranges.