15results about "Bed hydrotreatment processes apparatus" patented technology

A method for preparing a hydrodemetallization catalyst, belonging to the field of catalyst preparation technology, includes the following steps: impregnating spherical carbon particles with an iron-containing solution and drying them; mixing the dried carbon particles uniformly with alumina sol and forming droplets; drying and calcining the formed products to obtain an iron-modified alumina support; immersing the iron-modified alumina support in an organic ammonium solution for a first and second hydrothermal treatment; drying and calcining the treated products to obtain a treated alumina support; impregnating the treated alumina support with an active component impregnation solution; drying and calcining the impregnated support to obtain the hydrodemetallization catalyst. The catalyst prepared by this method exhibits high dehydrogenation, Ni removal, and V removal activity, while also possessing high tolerance for metal impurities. This catalyst is particularly suitable for the hydrotreating of heavy oil with high Ni impurity content.

The present disclosure relates to systems and methods for producing hydrogen among other products. In some embodiments, the method includes continuously performing a cracking step in a fixed bed mode and a flowing step in a fluidized bed mode. Such a continuous process may provide several advantages, including, for example, a step of regenerating a catalyst during the fluidized bed mode so that useful heat is generated for use in the endothermic cracking step.

A liquid / gas reactor is disclosed, which includes a primary catalyst bed having an inlet end and an outlet end, a means for feeding a primary feed stream to the inlet end of the primary catalyst bed, the primary feed stream including fresh feed and recycled at least partially converted liquid product, a secondary catalyst bed having an inlet end and an outlet end, the secondary catalyst bed extending substantially vertically through the primary catalyst bed, a means for feeding a secondary feed stream to the inlet end of the secondary catalyst bed, the secondary feed stream including recycled at least partially converted liquid product, a means for collecting the at least partially converted liquid product from the outlet end of the primary catalyst bed and recycling at least a portion of the at least partially converted liquid product to the inlet ends of the primary catalyst bed and the secondary catalyst bed, a separating wall between the primary and secondary catalyst beds, a means for feeding a primary gas stream only to the inlet end of the primary catalyst bed, and a means for feeding a secondary gas stream only to the inlet end of the secondary catalyst bed. A method for carrying out a gas-liquid reaction using the reactor is also disclosed.

The invention relates to the technical field of Fischer-Tropsch synthetic oil hydrocracking, and discloses a Fischer-Tropsch synthetic oil hydrogenation catalyst grading method and a Fischer-Tropsch synthetic oil hydrocracking method. The method comprises the steps that a replaceable area and a main reaction area which are connected in series are sequentially arranged in the material flow direction, the replaceable area is provided with two rotation areas which are connected in parallel, during normal operation of the device, at least one rotation area and the main reaction area operate online at the same time, and the single rotation area is sequentially filled with protective agents A1, A2 and A3 in the material flow direction; and the main reaction zone is filled with a cracking catalyst B1. According to the method, various protective agents are adopted for grading, and impurities in Fischer-Tropsch oil are intercepted step by step; meanwhile, the active center of the protective agent is adjusted, the alkali metal adsorption-interception capability is improved, and the toxicity of alkali metal to the cracking main agent is reduced.

The present invention is directed to an upwardly convex fixed-bed catalyst support (18) for a hydroprocessing reactor (10). The catalyst bed support (18) includes an upwardly convex annular-shaped perforated plate having an outer end in communication with the reactor inner surface (14), and an inner end in communication with a horizontal hub assembly.

The present disclosure refers to systems and methods for producing hydrogen among other products. In some embodiments the methods comprise sequentially conducting a cracking step in a fixed bed mode and conducting a flowing step in a fluidized bed mode. Such sequential processes may result in a number of advantages including, for example, regenerating the catalyst during the fluidized bed mode in a manner such that beneficial heat is generated for use in the endothermic cracking step.

Methods and systems for converting a renewable fuel intermediate composition to finished transportation fuel are provided herein. In some examples, a renewable fuel intermediate composition is flowed over a first catalyst in a first reaction zone to generate a saturated, hydrodeoxygenated product. A liquid portion of the renewable fuel intermediate composition may be characterized as having more than about 70 wt% of the oxygen being within ketone groups. The saturated, hydrodeoxygenated product may be flowed over a second fixed-bed catalyst in a second reaction zone to generate a product including the finished transportation fuel.

An adsorbent is in a liquid-phase hydrogenation catalyst composition. A catalyst bed containing the liquid-phase hydrogenation catalyst composition may be applicable in adsorption technology or oil liquid-phase hydrogenation technology. The adsorbent contains a porous material and a hydrogenation active metal supported on the porous material. The adsorbent has an average pore diameter of 2-15 nm, a specific surface area of 200-500 m2 / g, and the hydrogenation active metal is present in an amount, calculated as metal oxide, of 2.5 wt % or less, based on the total weight of the adsorbent. The adsorbent has a high hydrogen sulfide adsorption efficiency for a long period of time, and can effectively prolong the protection period for the hydrodesulfurization catalyst.

A multi-zone filtration device for a down-flow catalytic hydroprocessing reactor is disclosed. The filtration device may be used in the petroleum and chemical processing industries in catalytic reactions of hydrocarbonaceous feedstocks in the presence of hydrogen, at an elevated temperature and pressure, to remove contaminants from mixed gas and liquid feedstreams to reactor catalyst beds. The filtration device may be provided as a horizontal installation at the top of a reactor, whereby feedstream liquid is passed through filtration media zones in a radial flow direction. In one zone, the flow is radially outward from the center of a zone of the filtration device to the wall of the reactor. In another zone, the flow is radially inward from the wall of the reactor to the center of a zone of the filtration device. The liquid flows to the reactor catalyst bed after passing through the filtration device. Among the benefits provided are the minimization of scale and small / fine particulates that reach the catalyst bed below the device, reduced pressure drop through the reactor, even when the filter is completely fouled, the potential for added catalyst volume due to the reduced need to use catalyst grading materials, and the improved potential for reduced maintenance needs during reactor operation, e.g., top bed skimming or filtration media replacement, thereby extending the reactor run time length.

The invention relates to a method for producing C2-C4 olefins from methanol and ethanol, said method having the steps of: A) feeding a methanol- and optionally ethanol-containing feed flow A into a dimethyl ether fixed-bed reactor and catalytically reacting methanol to form dimethyl ether, wherein a product flow A1 containing dimethyl ether, methanol, ethanol and steam is obtained; B) mixing the flow A1 with at least one hydrocarbon return flow R containing C2-C6 hydrocarbons and catalytically reacting the mixture in an olefin fixed-bed reactor to form a raw product flow B containing C2-C4 olefins, C5-C6 hydrocarbon and C7+ hydrocarbons; C) cooling the raw product flow B, wherein a hydrocarbon raw product flow C is obtained; D) separating the hydrocarbon raw product flow C in a propylene-containing value product flow, optionally an ethylene-containing value product flow, a butene-containing value product flow, at least one C5-C6 hydrocarbon-containing return flow and at least one C6+ hydrocarbon-containing auxiliary product flow; E) returning a part of the C2-C4 olefins and at least a part of the C5-C6 hydrocarbons as one or more hydrocarbon return flows in step B); F) recovering a propylene-containing value product flow, an ethylene-containing value product flow and optionally a butene-containing value product flow; G) discharging the C6+ hydrocarbon-containing auxiliary product flow; characterised in that the flow A, in relation to methanol and ethanol, contains <1 wt. % or 30 to 50 wt. % ethanol, wherein, in relation to 100 wt. % of the C2-C4 olefins recovered as value products, 30 to 60 wt. % ethylene, 30 to 60 wt. % propylene, and 0 to 30 wt. % butene are recovered as value products, and, in relation to the C2-C4 olefins contained in the raw product flow B, 0 to 40% of the ethylene, 40 to 90% of the propylene, and 0 to 100% of the butene are fed back in step B), or the flow A, in relation to methanol and ethanol, contains 1 to 30 wt. % ethanol, wherein, in relation to 100 wt. % of the C2-C4 olefins recovered as value products, 0 to 20 wt. % ethylene, 70 to 100 wt. % propylene, and 1 to 20 wt. % butene are recovered as value products, and, in relation to the 40 C2-C4 olefins contained in the raw product flow B, 0 to 100% of the ethylene, 0 to 20% of the propylene and 40 to 100% of the butene are fed back in step B).

The present invention relates to a process for treating a feedstock from a renewable source, said process comprising the steps of: a) a hydrotreatment step, and obtaining a hydrotreated effluent; b) a hydrocracking step of the hydrotreated effluent obtained in step a), and obtaining a hydrocracking effluent; c) a separation step of the hydrocracking effluent obtained in step b), and obtaining at least one hydrocarbon liquid effluent; d) a stripping step of the hydrocarbon liquid effluent obtained in step c), and obtaining at least one stripped liquid effluent; e) a fractionation step of the stripped liquid effluent obtained in step d), and obtaining at least one paraffin-rich naphtha cut; f) a steam cracking step of at least a portion of the naphtha cut obtained in step e), and obtaining at least one bio-based gaseous effluent comprising ethylene and propylene. Figure 1 to be published

A hydrotreatment reactor bed is provided, which comprises – in order – a first layer, a second layer, a third layer and a fourth layer. The BET-surface area, the total pore volume and the pore size di

The application belongs to the technical field of catalyst unloading protection, and particularly relates to a hydrogenation catalyst film-forming flame retardant, a preparation method and application thereof, which comprises the following components in parts by weight: oxygen-containing hydrocarbon 90-95 parts, crosslinked grafted nano-silicon dioxide 1-5 parts, anionic surfactant 5-10 parts, dispersant 0.5-1 part and cosolvent 5-10 parts. In the application, the crosslinked grafted nano-silicon dioxide is dispersed in the oxygen-containing hydrocarbon to form a nano-fluid, the permeability of the film-forming flame retardant is improved, the film-forming flame retardant rapidly penetrates into the inside of the caked catalyst, and a more uniform and dense passivation film is formed.

A solid particulate bed and a fixed bed comprising the solid particulate bed, the solid particulate bed comprising a sea region and at least one island region distributed in the sea region, and having an upper surface, a lower surface, an axial direction and a radial direction, wherein the island region extends along the axial direction of the solid particulate bed but does not extend to the lower surface, and the void fraction of the island region is 110-300% of the void fraction of the sea region. An oil product hydrogenation method comprising the step of flowing an oil product through the solid particulate bed or fixed bed under hydrogenation reaction conditions.

1. A process for hydrotreating a liquid oil stream in a fixed bed reactor in continuous operation, comprising: the liquid stream is a thermochemically cracked oil stream and comprises polymerizable reactive compounds; the fixed bed reactor comprising at least a first reactor bed comprising a first hydrotreating catalyst and a second reactor bed comprising a second hydrotreating catalyst; 1. A method comprising: Next steps: (i) passing at least 50% by volume of a liquid oil stream through a first reactor bed and then through a second reactor bed during a first operating period; (ii) during a second operating period, based on a determination of the deposition of material formed from the polymerizable reactive compound on the first reactor bed, passing a reduced proportion of the liquid oil stream through the first reactor bed and passing an increased proportion of the liquid oil stream that has not passed through the first reactor bed through the second reactor bed; A method is provided, comprising: