Abstract:
Processes for the treating of sulfur-containing petroleum oil feedstocks employing alkali metal compounds, alkaline earth metal compounds, and mixtures thereof are disclosed. Specifically, processes for hydrotreating feedstocks which have been previously partially desulfurized using conventional hydrodesulfurization catalysts by contacting such feedstocks with alkali metal compounds, alkaline earth metal compounds, and mixtures thereof, are disclosed. Preferably, the products of such a treatment are employed as feeds for catalytic cracking processes. In addition, processes for the combined hydrotreating and hydroconversion of various sulfur-containing petroleum oil feeds are disclosed, employing at least two hydroconversion agents selected from the group consisting of the alkali metal compounds and alkaline earth metal compounds, in the presence of added hydrogen, and at elevated temperatures. The reaction products formed thereby include a substantially desulfurized and demetallized, as well as a significantly upgraded petroleum product. The latter is demonstrated by a reduced Conradson carbon content and an increased API gravity.
Abstract:
Hydrocarbon feedstreams are desulfurized using an alkali metal reagent, optionally in the presence of hydrogen. Improved control over reaction conditions can be achieved in part by controlling the particle size of the alkali metal salt and by using multiple desulfurization reactors. After separation of the spent alkali metal reagent, the resulting product can have suitable characteristics for pipeline transport and/or further refinery processing.
Abstract:
After desulfurizing a hydrocarbon feedstream using an alkali metal reagent, the hydrocarbon feedstream can include particles of spent alkali metal salts. The spent alkali metal salts can be separated from the hydrocarbon feedstream and regenerated to form an alkali metal reagent, such as a alkali hydroxide or alkali sulfide. The regeneration process can pass through an intermediate stage of forming an alkali carbonate by successive reactions with carbon dioxide and calcium oxide. The calcium oxide can also be regenerated.
Abstract:
The invention described herein is directed to (a) slurry hydroprocessing (SHP) of a feed under SHP conditions; (b) deasphalting, under deasphalting conditions the product obtained from said step (a) and recovering a solvent deasphalted oil and solvent deasphalted rock; (c) calcining said solvent deasphalted rock at a temperature of ≦about 1200° F. to produce an ash catalyst precursor; (d) recycling said ash catalyst precursor to said step (a).
Abstract:
Sulfur-containing petroleum feeds are desulfurized by contacting the feeds with staged addition of sodium metal at temperatures of at least about 250° C. in the presence of excess hydrogen to sodium metal. The formation of Na2S is substantially suppressed and the formation of NaSH is promoted in the desulfurization process.
Abstract:
The invention relates to a process for demetallating a petroleum stream by contacting a metals-containing petroleum feed in the presence of a base selected from Group IA and IIA hydroxides and carbonates and ammonium hydroxide and carbonates and mixtures thereof an oxygen containing gas and a phase transfer agent at a temperature of up to 180.degree. C. for a time sufficient to produce a treated petroleum feed having a decreased metals content. The invention provides a method for enhancing the value of petroleum feeds that traditionally have limited use in refineries due to their metals, e.g., Ni and V content.
Abstract:
A process for the thermal conversion of the organic component associated with tar sands to lower boiling, higher value products. The conversion is achieved by subjecting the organic component containing from about 1 to 20 wt. % native solids to elevated temperatures and pressures. Compared to conventional thermal conversion processes, such as visbreaking, much higher conversion of the organic component can be achieved owing to the presence of native solids on which coke is deposited instead of fouling the process equipment. This higher conversion is also associated with enhanced removal of sulfur and metals.
Abstract:
The present invention relates to an integrated fluid coking/hydrogen production process. The fluid coking unit is comprised of a fluid coker reactor, a heater, and a gasifier. Solids from the fluidized beds are recycled between the coking zone and the heater and between the heater and the gasifier. A separate stream of hot solids from the gasifier is passed to the scrubbing zone of the reactor. Methane and steam are introduced into the stream of hot solids passing from the gasifier to the scrubbing zone. The hot particles act to catalyze the conversion of methane to carbon monoxide and hydrogen in the presence of steam.
Abstract:
Heavy petroleum oils, preferably whole crude or residua, are desulfurized and upgraded by contacting the petroleum oil with sodium oxide in the presence of hydrogen at elevated temperatures. The resulting mixture comprising desulfurized petroleum oil and a dispersion of sodium salts, primarily sodium sulfide and sodium hydroxide, is separated by conventional means and sodium oxide is regenerated from the salts.
Abstract:
Heavy carbonaceous feeds, including various sulfur-containing heavy petroleum oils, are simultaneously desulfurized and subjected to hydroconversion by contacting these feedstocks with alkali metal oxides in a conversion zone maintained at elevated temperatures and in the presence of hydrogen. In this manner, the feeds are substantially desulfurized, and significant upgrading of the feedstocks is also obtained as demonstrated by decreased Conradson carbon, increased API gravity, and conversion of a substantial portion of the 1,050.degree. F+ portion of the feedstream. In addition, methods for the regeneration of the alkali metal oxides from the alkali metal sulfide salts produced in the reaction zone are disclosed.