The furnace of a delayed coking unit which is utilized for heating residue feeds to high temperatures can suffer from decrease in run length and fouling caused by caustic carryover from the upstream desalter unit. An antifoulant additive for preventing caustic induced fouling of thermal cracker furnace tubes is disclosed. The described antifoulant additive acts by converting the inorganic caustic compound such as NaOH to naphthenate salt of the metal as well as by reducing the fouling tendency of the whole feedstock, thereby making it ineffective in causing coking reaction. The additive finds application in thermal residue upgradation furnaces such as delayed coking unit, visbreaker, etc.

The present disclosure relates to methods and compositions for reducing fouling by natural and synthetic foulants that tend to precipitate during hydrocarbon collecting, processing, transporting, and storing. The method includes applying a composition to a hydrocarbon containing the foulant. The composition includes an effective amount of a reaction product of an α-olefin/maleic anhydride copolymer and an amino-hydroxy compound. The foulants may include wax and asphaltenes, for example.

A process for reducing the environmental contaminants in a ISO 8217 compliant Feedstock Heavy Marine Fuel Oil, the process involving: mixing a quantity of the Feedstock Heavy Marine Fuel Oil with a quantity of Activating Gas mixture to give a feedstock mixture; contacting the feedstock mixture with one or more catalysts to form a Process Mixture from the feedstock mixture; separating the Product Heavy Marine Fuel Oil liquid components of the Process Mixture from the gaseous components and by-product hydrocarbon components of the Process Mixture and, discharging the Product Heavy Marine Fuel Oil. The Product Heavy Marine Fuel Oil is compliant with ISO 8217 for residual marine fuel oils and has a sulfur level has a maximum sulfur content (ISO 14596 or ISO 8754) between the range of 0.05 % wt. to 0.5 % wt.. The Product Heavy Marine Fuel Oil can be used as or as a blending stock for an ISO 8217 compliant, IMO MARPOL Annex VI (revised) compliant low sulfur or ultralow sulfur heavy marine fuel oil. A device for conducting the process is also disclosed.

A process for treating plastics pyrolysis oil by a) selectively hydrogenating a feedstock in the presence hydrogen and a selective hydrogenation catalyst, at a temperature between 100 and 150° C., a hydrogen partial pressure between 1.0 and 10.0 MPa abs. and an hourly space velocity between 1.0 and 10.0 h.sup.−1, to obtain a hydrogenated effluent; b) hydrotreating the hydrogenated effluent in the presence of hydrogen and a hydrotreating catalyst, at a temperature between 250 and 370° C., a hydrogen partial pressure between 1.0 and 10.0 MPa abs. and an hourly space velocity between 0.1 and 10.0 h.sup.−1, to obtain a hydrotreating effluent; c) separating the hydrotreating effluent in the presence of an aqueous stream, at a temperature between 50 and 370° C., to obtain at least one gaseous effluent, a liquid aqueous effluent and a liquid hydrocarbon effluent; e) recycling at least one fraction of the product obtained.

The invention concerns a method for converting heavy hydrocarbon feedstocks of which at least 50% by weight boils at a temperature of at least 300° C., and in particular vacuum residues. The feedstocks are subjected to a first step a) of deep hydroconversion, optionally followed by a step b) of separating a light fraction, and a heavy residual fraction is obtained from step b) of which at least 80% by weight has a boiling temperature of at least 250° C. Said fraction from step b) or the effluent from step a) is then subjected to a second step c) of deep hydroconversion. The overall hourly space velocity for steps a) to c) is less than 0.1 h.sup.−1. The effluent from step c) is fractionated to separate a light fraction. The heavy fraction obtained, of which 80% by weight boils at a temperature of at least 300° C., is sent to a deasphalting step e). The deasphalted fraction DAO is then preferably converted in a step f) chosen from ebullated bed hydroconversion, fluidised bed catalytic cracking and fixed bed hydrocracking.

A multi-stage process for the production of a Product Heavy Marine Fuel Oil compliant with ISO 8217: 2017 as a Table 2 residual marine fuel from a high sulfur Feedstock Heavy Marine Fuel Oil compliant with ISO 8217: 2017 as a Table 2 residual marine fuel except for the sulfur level, involving hydrotreating under reactive distillation conditions in a Reaction System composed of one or more reaction vessels. The reactive distillation conditions allow more than 75% by mass of the Process Mixture to exit the bottom of the reaction vessel as Product Heavy Marine Fuel Oil. The Product Heavy Marine Fuel Oil has a maximum sulfur content (ISO 14596 or ISO 8754) less than 0.5 mass %. A process plant for conducting the process for conducting the process is disclosed.

Combined hydroprocessing and solvent deasphalting with sequential addition of a dispersed catalyst to process heavy oil without increasing equipment fouling. An example method includes: hydroprocessing heavy oil containing dispersed catalyst particles to yield upgraded heavy oil; subjecting a resid portion of the upgraded heavy oil to solvent deasphalting to produce DAO and pitch; and hydroprocessing the deasphalted oil containing dispersed catalyst particles to yield upgraded deasphalted oil. An example system includes: mixer(s) for blending catalyst precursor with heavy oil to form conditioned feedstock; heater to decompose catalyst precursor and form dispersed catalyst particles in situ; hydroprocessing reactor(s) for hydroprocessing heavy oil to yield upgraded heavy oil; solvent deasphalting system to separate DAO from pitch; mixer(s) for blending catalyst precursor with deasphalted oil to form conditioned deasphalted oil; heater to decompose catalyst precursor and form dispersed catalyst particles in situ; and hydroprocessing reactor(s) for hydroprocessing deasphalted oil yield upgraded deasphalted oil.

Technologies for reducing the viscosity of heavy crude oil are disclosed. In embodiments the technologies utilize a combination of a processing additive composition (PAC) and hydrodynamic cavitation to produce an oil composition having a viscosity V2, wherein V2 is at least 40% less than a viscosity V1 of untreated heavy crude oil. PACs, systems for reducing the viscosity of heavy crude oil using a combination of a PAC and hydrodynamic cavitation, and methods for reducing the viscosity of heavy crude oil with a combination of a PAC and hydrodynamic cavitation are also disclosed.

An improved process for making a base oil and for improving base oil yields by combining an atmospheric resid feedstock with a base oil feedstock and forming a base oil product via hydroprocessing. The process generally involves subjecting a base oil feedstream comprising the atmospheric resid to hydrocracking and dewaxing steps, and optionally to hydrofinishing, to produce a light and heavy grade base oil product. A process is also disclosed for making a base oil having a viscosity index of 120 or greater from a base oil feedstock having a viscosity index of about 100 or greater that includes a narrow cut-point range vacuum gas oil. The invention is useful to make Group II and/or Group III/III+ base oils, and, in particular, to increase the yield of a heavy base oil product relative to a light base oil product produced in the process.

Disclosed herein are carbon molecular sieves and methods of making the same through the pyrolysis of a polymer precursor in the presence of a reactive gas stream including a hydrogen source.