152results about "Refining by selective hydrogenation" patented technology

The present invention relates to a method for treating plastic pyrolysis oil, comprising: a) hydrogenating said feedstock in a mixture with at least a portion of the liquid effluent obtained from step c) in the presence of hydrogen and a catalyst at a temperature of 140-340° C.; b) hydrotreating said hydrogenated effluent in the presence of hydrogen and a catalyst; c) separating the hydrotreated effluent, said separation being carried out at high temperature and under high pressure to obtain a gaseous effluent and a liquid effluent, and recycling a portion of the liquid effluent upstream of step a); d) feeding at low temperature and under high pressure the other portion of the gaseous and liquid effluents obtained from step c) and an aqueous solution to carry out the separation and obtain a hydrocarbon-based effluent.

The present invention provides a method for producing biodiesel fuel containing saturated hydrocarbons as a main component under relatively mild conditions using vegetable oils or animal fats as a raw material. [Solution] This is a method for producing biodiesel fuel from vegetable oils or animal fats, comprising a decarboxylation step in which carbon dioxide is removed from ester groups in the vegetable oils or animal fats using a decarboxylation catalyst to produce hydrocarbons, and a hydrogenation step in which the resulting hydrocarbons are hydrogenated using a hydrogenation catalyst to produce diesel fuel consisting of saturated hydrocarbons, wherein the decarboxylation step and the hydrogenation step are carried out in the stated order, and each of the decarboxylation step and the hydrogenation step is carried out under a pressure of 0.2 MPa or less.

This invention discloses a Mg-modified hydrogenation catalyst and its preparation method. The Mg-modified hydrogenation catalyst is a sulfide-state catalyst, comprising a support, active metals Mo and Ni, and Mg. Characterized by TEM-EDS, the Mg content distributed in the Ni-Mo-S active phase region accounts for 65%-90% of the total Mg content. The modified hydrogenation catalyst of this invention can be used to treat low-quality secondary processed heavy oils, exhibiting good processing capacity and stability, especially for feedstocks with high olefin content.

The present application provides a kind of acetylene selective hydrogenation catalyst and its preparation method and application, the catalyst can be converted into ethylene by the selective hydrogenation of acetylene in carbon dioxide fraction.The catalyst comprises main active component, auxiliary active component and carrier, by regulating the type, quantity and density of carrier oxygen-containing group, the distribution of metal active component is controlled, the metal utilization is improved while the green oil generation is reduced to obtain better ethylene selectivity.

The present invention discloses a reformate hydrogenation olefin removal method, which comprises: (1) feeding a reformate raw material into a divided wall rectifying tower to obtain a tower top material C7 and components below, a side line material C8 component and a tower bottom material C9 + component; (2) respectively mixing tower top material C7 and components below and a side line material C8 component with hydrogen to obtain a first material flow and a second material flow, and carrying out contact reaction on the two material flows and a catalyst bed layer in a first hydrogenation reactor from bottom to top to obtain a first hydrogenation reaction effluent; and (3) separating the first hydrogenation reaction effluent to obtain a light component and a heavy component, mixing the heavy component with a tower bottom material C9 + component and hydrogen, feeding the mixture into a second hydrogenation reactor to obtain a second hydrogenation reaction effluent, and mixing the light component with the second hydrogenation reaction effluent to obtain a refined product. Two-stage hydrotreatment is carried out according to different fraction stage olefin removal difficulty, the olefin content in the reformate is effectively reduced, aromatic hydrocarbon saturation is reduced, and the reaction operation period is prolonged.

To provide a process for dehydrogenating normal paraffins derived from natural oils to olefins.SOLUTION: A feed stream is passed through an adsorbent bed comprising alkaline or alkaline earth cation exchange X-zeolite to remove essentially all oxygenates and aromatics from the feed stream. One or more additional adsorbent beds having different adsorbents can also be included to remove additional oxygenates and aromatics as well as sulfur compounds, nitrogen compounds, phosphorous compounds, or combinations thereof. The dehydrogenation process can be part of a process for producing alkylbenzenes from natural oils.SELECTED DRAWING: Figure 2

The invention relates to a process for hydrogenating olefins contained in an olefinic feed of the middle distillate type, derived at least in part from a renewable source, in the presence of a catalyst comprising nickel and copper, at a rate of 10% and 50% by weight of nickel relative to the total weight of the catalyst, and at a rate of 0.15% and 1.3% by weight of copper relative to the total weight of the catalyst, and a support comprising alumina.

Methods for producing olefins through hydrocarbon steam cracking include passing a hydrocarbon feed that includes one or more hydrocarbons to a hydrocarbon cracking unit and passing one or more sulfur-containing compounds to the hydrocarbon cracking unit. The sulfur-containing compounds include at least hydrogen sulfide gas, and a flow rate of the sulfur-containing compounds to the hydrocarbon cracking unit is sufficient to produce a molar concentration of elemental sulfur in the hydrocarbon cracking unit of from 10 ppm to 200 ppm. The methods include cracking the hydrocarbon feed in the hydrocarbon cracking unit to produce a cracker effluent and contacting the cracker effluent with a quench fluid in a quench unit to produce at least a cracked gas and a first pygas. The first pygas has a concentration of carbon disulfide less than 50 ppmw based on the total mass flow rate of the first pygas.

The present invention provides a method for efficiently manufacturing a chemical product from a waste material including waste tires by improving each step in a series of processes. A method for producing a chemical product, the method comprising: a thermal cracking step for obtaining a first gas component, a thermally cracked oil, and a residue component by thermal cracking of a crushed product of a waste material including a waste tire; a low-temperature hydrogenation step in which a low-temperature hydrogenated oil is obtained by subjecting a starting material oil containing at least a portion of the pyrolysis oil to a low-temperature hydrogenation treatment at 180-350 DEG C; a hydrocracking step in which a raw oil containing at least a portion of the low-temperature hydrogenated oil is hydrocracked at a temperature higher than the low-temperature hydrotreating temperature to obtain a second gas component, a light component having a boiling point of 350 DEG C or less, and a heavy component having a boiling point of more than 350 DEG C; and a steam cracking step for obtaining a chemical product by subjecting the steam cracking raw oil containing at least a portion of the light component to a steam cracking treatment. In the thermal cracking step, the amount of the thermal cracked oil is 40 mass% or more with respect to the total amount of the first gas component, the thermal cracked oil, and the residue component.

A system for hydrotreating a hydrocarbon feedstock has a first stage including one or more first reactors capable of receiving the hydrocarbon feedstock and converting the hydrocarbon feedstock into an intermediate product. The feedstock has a total chlorine (Cl) content greater than 3 parts per million by weight (ppmw), and the intermediate product includes hydrogen chloride (HCl), ammonia (NH), and ammonium salts. The system also includes a heating system having a plurality of heat exchangers arranged in a loop and a heat transfer fluid capable of recovering and distributing heat to one or more fluids in the first stage. At least one heat exchanger of the plurality of heat exchangers is disposed between the first stage and the separation section, and the at least one heat exchanger is capable of maintaining a temperature of the intermediate product above the sublimation temperature of ammonia and hydrogen halide.

A method for preparing a hydrocarbon stream for oligomerization is provided. The method uses a stripping column to strip dimethyl ether from an olefin stream. Lighter olefins, such as C3-olefins, are also removed. The C4+ olefins can then be sent for further processing, including selective hydrogenation followed by oligomerization.

1. A method for converting a hydrocarbonaceous feed containing at least 20 ppmw, at least 100 ppmw, or at least 500 ppmw and less than 1000 ppmw, 5000 ppmw, or 10000 ppmw of halides by hydrotreating in the presence of a material catalytically active in hydrotreating and an amount of hydrogen, comprising: the hydrocarbon product stream comprises an amount of ionic halides; the hydrocarbon product stream is combined with a quantity of wash water, the mass ratio of wash water to hydrocarbon product stream being greater than 1:10, greater than 1:5, or greater than 1:2, and less than 1:1, less than 2:1, or less than 10:1; wherein the combined hydrocarbon product stream and wash water are separated into a non-polar stream of hydrocarbon product and a polar stream of wash water containing ionic halides such that 50%, 90%, or 99% to 100% of the ionic halides are transferred from the hydrocarbon product stream to a polar stream of wash water containing ionic halides; An advantage associated with such a process, wherein the polar stream of wash water containing ionic halides is directed to a concentration means to provide a purified water stream and a brine stream, wherein the brine stream is characterized by having an ionic halide concentration that is more than 2 times, more than 5 times, or more than 10 times, and less than 50 times, or less than 100 times, that of the polar stream of wash water containing ionic halides, is the ability to receive a hydrocarbon mixture containing high amounts of halides and purify it into a hydrocarbon product of consistent quality while minimizing water consumption.

Provided is a process for processing circular feedstocks, renewable feedstocks, or a mix of both renewable and circular feedstocks in an ebullated bed (EB) reactor. At least a portion of the renewable and / or circular feedstocks is added to the EB reactor above its catalyst grid, while a sufficient amount of the feedstocks is injected at the bottom of the EB reactor to create the fluidized bed.

A method of producing a fuel additive includes passing a feed stream comprising C4 hydrocarbons through a hydrogenation unit producing a hydrogenated stream; passing the hydrogenated stream through a distillation unit producing a first stream and a second stream; producing an isobutylene stream by passing the first stream through a molecular sieve unit; passing the isobutylene stream to a hydration unit as a feedstock for the fuel additive; and forming the fuel additive in the hydration unit.

Provided is a method for efficiently manufacturing a chemical product from a waste material including waste tires, which enables long-term operation of a process by improving each step in a series of processes. A method for producing a chemical product, the method comprising: a thermal cracking step for obtaining a first gas component, a pyrolytic oil, and a residue component by thermally cracking a crushed waste material including a waste tire; a low-temperature hydrogenation step in which a low-temperature hydrogenated oil is obtained by subjecting a raw oil containing at least a portion of the pyrolytic oil to low-temperature hydrogenation at 180-350 DEG C; a separation step for separating into a naphtha fraction and another fraction by atmospheric distillation of a raw oil for atmospheric distillation containing at least a portion of the low-temperature hydrogenated oil and crude oil; and a steam cracking step for obtaining a chemical product by subjecting a steam cracking raw oil containing at least a portion of the naphtha fraction to a steam cracking treatment. In the thermal cracking step, the amount of the pyrolytic oil is 40% by mass or more with respect to the total amount of the first gas component, the pyrolytic oil, and the residue component.

The present invention relates to a method for processing plastic pyrolysis oil, the method comprising: (a) selectively hydrogenating the feedstock to obtain a hydrogenated effluent; (b) hydrotreating the hydrogenated effluent to obtain a hydrotreated effluent; (c) performing a first hydrocracking step on the hydrogenated effluent to obtain a first hydrocracked effluent; (d) separating the hydrogenated effluent in the presence of an aqueous stream to obtain a gaseous effluent, a liquid aqueous effluent, and a liquid hydrocarbon effluent; (e) fractionating the liquid hydrocarbon effluent to obtain at least one gas stream, at least one naphtha fraction, and a heavier fraction; (f) performing a second hydrocracking step on the heavier fraction to obtain a second hydrocracked effluent; and (g) recycling at least a portion of the second hydrogenated effluent to the separation step (d).

The invention relates to a method for preparing a catalyst containing nickel and copper and a porous alumina support, comprising the following steps of : a) bringing the alumina support into contact with a solution containing a nickel precursor and a first organic compound having at least one carboxylic acid function; b) drying at a temperature below 250°C, then calcining at a temperature of between 250°C and 550°C; c) bringing the calcined catalyst precursor obtained at the end of step b) into contact with a solution containing a nickel precursor, a copper precursor and a second organic compound having at least one carboxylic acid function; d) drying at a temperature below 250°C.

A method of making a selective hydrogenation catalyst includes forming a mixed phase alumina support having a BET surface area in the range of between approximately 30 to approximately 60 square meters / gram (m2 / g). The mixed phase alumina support includes alpha alumina and theta alumina. The method also includes impregnating the mixed phase alumina support with an impregnation solution having one or more metals selected from Group VIIIB, Group IB, or both of the Periodic Table of Elements to form an impregnated support, drying the impregnated support at a temperature in the range of between approximately 100 degrees Celsius (°C) and 150 °C to form a dried impregnated support, calcining the dried impregnated support at a temperature range of between 350 °C and approximately 500 °C to form a calcined impregnated support, and reducing the one or more metals on the calcined impregnated support at a temperature in the range of between approximately 400 °C and approximately 600 °C in the presence of hydrogen to form the selective hydrogenation catalyst.

A process for producing light olefins from a hydrocarbon feed comprising arsenic at an initial quantity. The process can comprise one of more of: introducing the hydrocarbon feed to a desalter to produce a desalted hydrocarbon feed having a reduced quantity of arsenic: preheating the desalted hydrocarbon feed; introducing the preheated hydrocarbon feed to a flash separation vessel to produce an overhead fraction and a bottoms fraction; introducing the overhead fraction and steam to a radiant section of the steam cracker operated under steam cracking conditions to produce a. steam cracked effluent; and separating the steam cracked effluent to obtain a steam cracker tar, a steam cracker gas oil, a naphtha, cut, and a process gas stream; and recovering an olefin product stream from the process gas stream. Arsenic quantities in various streams in the process can be calculated and controlled.

The invention relates to the field of hydroprocessing of liquid oils such as pyrolysis oils, more specifically to the stabilization of the liquid oil by hydrotreating prior to being upgraded by further hydroprocessing. More particularly, the invention relates to the stabilization of pyrolysis oil containing polymerisable reactive compounds.

The invention relates to a process for the production of a hydrocarbyl feedstock of the middle distillate type from an alcoholic feedstock, said process comprising the following stages: a) dehydration of the alcoholic feedstock and producing at least a dehydrated effluent comprising:-at least 80% by weight, relative to the total weight of the effluent, of ethylene on a dry basis,-a compound having at least 3 carbon atoms; the process is carried out in the presence of an acidic amorphous catalyst or an acidic zeolite catalyst; b) separating the dehydrated effluent obtained in stage a) and producing at least: a fraction substantially comprising ethylene, a fraction substantially comprising compounds having at least 3 carbon atoms; c) oligomerization of at least a portion of the fraction essentially comprising ethylene obtained from stage b) and producing at least an olefinic effluent comprising at least 80% by weight, relative to the total weight of olefins contained in the olefinic effluent, of olefins having a number of carbon atoms greater than or equal to 4, carried out in the presence of a homogeneous catalyst; d) oligomerization of at least the following:-a portion of the effluent from stage c),-a portion of the fraction from stage b) essentially containing compounds having at least 3 carbon atoms, and producing an effluent of the middle distillate type, which is carried out in the presence of an amorphous or zeolitic heterogeneous catalyst; e) fractionation of the effluent of the middle distillate type obtained from stage d).

To provide a method for selective hydrogenation of gasoline containing polyunsaturated compounds and light sulfur compounds.SOLUTION: Provided is a method for applying a selective hydrotreatment catalyst comprising an active phase based on nickel and molybdenum, and a porous carrier made of alumina and / or nickel aluminate, characterized in that the molar ratio of nickel to molybdenum is more than 2.5 mol / mol and less than 3.0 mol / mol.SELECTED DRAWING: None

Catalyst comprising nickel, copper and sulfur, between 10% and 50% by weight of nickel element relative to the total weight of the catalyst, between 0.15% and 0.45% by weight of copper element relative to the total weight of the catalyst, and between 0.1% and 2% by weight of sulfur element relative to the total weight of the catalyst and an alumina support.

A method for preparing an olefin stream for oligomerization includes fractionating an olefin stream to provide a light gas stream and an olefin-enriched stream, which is selectively hydrogenated to convert diolefins to monoolefins to provide a monoolefin stream, and oligomerizing the monoolefin stream over an oligomerization catalyst to provide an oligomerized stream.

The present disclosure relates to a novel ruthenium oxide, a method of preparing the same, and a catalyst for selective hydrogenation of an aromatic compound or an unsaturated compound including the ruthenium oxide.

To provide a method which efficiently produces a chemical product and also efficiently provides a carbide from used tires by improvement of each step in a set of processes. A method for producing a chemical product and a carbide, the method including a pyrolysis step of obtaining a first gas fraction, pyrolysis oil, and a residue fraction through pyrolysis of a crushed product of used tires, a carbide recovery step of recovering carbide from the residue fraction, a low-temperature hydrogenation step of subjecting raw oil containing at least one portion of the pyrolysis oil to low-temperature hydrotreatment at 180°C or higher and 350°C or lower, to obtain low-temperature hydrogenated oil, a hydrogenolysis step of subjecting raw oil containing at least one portion of the low-temperature hydrogenated oil to hydrogenolysis treatment at a higher temperature than that in the low-temperature hydrotreatment, to obtain a second gas fraction, a light fraction having a boiling point of 350°C or lower, and a heavy fraction having a boiling point of higher than 350°C, and a steam cracking step of obtaining a chemical product, and a raw material for carbide production, containing a heavy distillate fraction having a 10% distillation temperature of 190°C or higher, by steam cracking of steam cracking raw oil containing at least one portion of the light fraction, in which a pyrolysis temperature of the pyrolysis is 350°C or higher and 750°C or lower.

METHOD FOR MANUFACTURING HYDROCARBON FLUIDS WITH AT LEAST PART-INTEGRATED DIHYDROGEN PRODUCTION The invention relates to a method for manufacturing hydrocarbon fluids, in particular paraffins, from a hydrocarbon feedstock of natural origin containing at least 50% by mass of glycerides, said method comprising: a) a step of hydrolysis of the hydrocarbon feedstock of natural origin, b) a step of recovery of the products of step a) separating a first effluent containing free fatty acids and a second effluent containing alcohols and water, c) a step of hydrotreating said first effluent to transform the free fatty acids into paraffins, e) a step of reforming in aqueous phase the second effluent recovered in step b) during which at least a part of the alcohols it contains is converted into dihydrogen, carbon dioxide and carbon monoxide, f) a step of separation of the dihydrogen formed during step e),The separated dihydrogen is sent to step c) hydrotreatment, and optionally to a step d) hydroisomerization and / or hydrocracking of the hydrotreated effluent. Abbreviated figure: Figure 1.