442results about "Refining by selective hydrogenation" patented technology

[Problem] To provide a method for efficiently producing a chemical product from a waste material containing waste tires by improving each step in a series of processes to realize long-term operation of the processes. [Solution] This method for producing a chemical product involves a pyrolysis step for obtaining, through pyrolysis of a crushed product of a waste material including waste tires, a first gas component, a pyrolysis oil, and a residual component, a low-temperature hydrogenation step for subjecting a raw material oil containing at least part of the pyrolysis oil to a low-temperature hydrogenation treatment at a temperature of 180°C-350°C to obtain a low-temperature hydrogenated oil, a high-temperature hydrogenation step for subjecting a raw material oil containing at least part of the low-temperature hydrogenated oil to a hydrogenation treatment at a temperature higher than that of the low-temperature hydrogenation treatment to obtain a second gas component and a high-temperature hydrogenated oil, a separation step for separating a naphtha fraction from other fractions through atmospheric distillation of an atmospheric distillation raw material oil containing crude oil and at least part of the high-temperature hydrogenated oil, and a steam cracking step for subjecting a steam cracking raw material oil containing at least part of the naphtha fraction and / or other fractions to a steam cracking treatment to obtain a chemical product, wherein the amount of the pyrolysis oil with respect to the total amount of the first gas component, the pyrolysis oil, and the residual component in the pyrolysis step is 40% by mass or more.

[Problem] To provide a method for efficiently producing a chemical product from waste tires by improving steps in a series of processes and also efficiently obtaining a carbide. [Solution] Provided is a method for producing a chemical product and a carbide, the method comprising: a thermal decomposition step for obtaining a first gas, a thermal decomposition oil and a residue through thermal decomposition of fragmented waste tires; a carbide recovery step for recovering a carbide from the residue; a low temperature hydrogenation step for subjecting a raw material oil containing at least a portion of the thermal decomposition oil to a low temperature hydrogenation treatment at a temperature of 180-350ºC to obtain a low temperature hydrogenated oil; a hydrocracking step for subjecting a raw material oil that contains at least a portion of the low temperature hydrogenated oil to a hydrocracking treatment at a temperature higher than that in the low temperature hydrogenation treatment so as to obtain a second gas, 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 for steam cracking a steam cracking raw material oil that contains at least a portion of the light fraction so as to obtain a chemical product and a raw material for carbide production, which comprises a heavy fraction having a 10% distillation temperature of 190°C or higher. The thermal decomposition temperature in the thermal decomposition is 350-750ºC.

The disclosure relates to a method for upgrading liquefied waste plastic, wherein the method includes a step of providing a liquefied waste plastic feed, a step of thermally cracking the liquefied waste plastic feed in a thermal cracking reactor, and a step of separating at least a fraction including ethylene from the effluent of the thermal cracking reactor, wherein the liquefied waste plastic feed has a content ratio of i-olefins to n-olefins of 3.0 or less. The disclosure also provides a liquefied waste plastic feed for thermal cracking.

The present invention relates to a process for the treatment of a plastics pyrolysis oil, comprising:a) the hydrogenation of said feedstock as a mixture with at least a part of the liquid effluent resulting from stage c) and in the presence of hydrogen and of a catalyst at a temperature between 14° and 340° C.;b) the hydrotreating of said hydrogenated effluent in the presence of hydrogen and of a catalyst;c) a separation of the hydrotreated effluent operated at high temperature and high pressure, in order to obtain a gaseous effluent and a liquid effluent, a part of which is recycled upstream of stage a),d) a separation operated at low temperature and high pressure and fed with the gaseous effluent and the other part of the liquid effluent resulting from stage c) and an aqueous solution, in order to obtain a hydrocarbon effluent.

The present invention relates to a method for upgrading liquefied waste plastics, the method comprising the steps of providing a liquefied waste plastics feed, pyrolyzing the liquefied waste plastics feed in a pyrolysis reactor, and separating at least one fraction comprising ethylene from the effluent of the pyrolysis reactor, wherein the liquefied waste plastics feed has a content ratio of i-olefins to n-olefins of 3.0 or less. The present invention further provides a liquefied waste plastics feed for pyrolysis.

[Problem] To provide a method that, by improving each step in a series of processes, can efficiently produce chemical products from waste tire-containing waste materials. [Solution] The chemical product production method comprises: a pyrolysis step for obtaining a first gas fraction, a pyrolysis oil, and a residue by pyrolyzing a pulverized material from a waste tire-containing waste material; a low-temperature hydrogenation step for obtaining a low-temperature hydrogenated oil by subjecting a starting oil containing at least a portion of the pyrolysis oil to a low-temperature hydrogenation treatment at 180°C to 350°C; a hydrocracking step for subjecting a starting oil containing at least a portion of the low-temperature hydrogenated oil to a hydrocracking treatment at a temperature higher than that of the low-temperature hydrogenation treatment, to obtain a second gas fraction, a light fraction having a boiling point of not more than 350°C, and a heavy fraction having a boiling point above 350°C; and a steam cracking step for subjecting a steam cracking starting oil containing at least a portion of the light fraction to a steam cracking treatment to obtain a chemical product, wherein the amount of the pyrolysis oil in the pyrolysis step is at least 40 mass% with reference to the total amount of the first gas fraction, pyrolysis oil, and residue.

A process for preparing middle distillates from an olefinic feedstock, bya) oligomerization fed with the olefinic feedstock, a first recycle and a second recycle, and operated in the presence of at least one oligomerization catalyst, to produce a reaction effluent containing dimers, trimers and oligomers;b) fractionating the reaction effluent into:a light fraction containing at least part of the unconverted olefinic feedstock;an intermediate fraction containing at least part of the dimers and trimers; anda heavy fraction containing the oligomers;c) recycling by the preparation of a first recycle containing at least part of the light fraction; and a second recycle containing at least part of the intermediate fraction; and transfer of the first recycle and the second recycle to step a);d) hydrogenating at least part of the heavy fraction.

The invention relates to the related technical field of pyrolysis gasoline first-stage selective hydrogenation catalysts, and particularly discloses a nickel-based catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: S1, dissolving an aluminum (III) salt and a gallium (III) salt in a first solvent, adding a thickening agent, and uniformly mixing; then, sequentially carrying out aging, drying and first roasting in a protective atmosphere, so as to obtain an Al2O3-Ga2O3 carrier; step S2, dissolving a nickel (II) salt in a second solvent, and then adding the Al2O3-Ga2O3 carrier obtained in the step S1; and then, sequentially carrying out ultrasonic treatment, evaporating the second solvent to dryness, and carrying out secondary roasting in a protective atmosphere, so as to obtain the nickel-based catalyst. The nickel-based catalyst is prepared by the preparation method. The nickel-based catalyst is applied to first-stage selective hydrogenation of pyrolysis gasoline. The hydrogenation activity and selectivity of the nickel-based catalyst in first-stage selective hydrogenation of pyrolysis gasoline are greatly improved.

A method of producing a fuel additive includes passing a feed stream comprising C4 hydrocarbons through a first hydrogenation unit producing a first process stream; passing the first process stream through a distillation unit; withdrawing a 2-butene stream from the distillation unit: passing the 2-butene stream through a second hydrogenation unit producing a 1-butene stream; passing at least a portion of the 1-butene stream through a separation unit; and passing the 1-butene stream through a hydration unit producing the fuel additive.

The invention discloses an alloy-loaded Pd-Cu-Ho trimetal catalyst, preparation thereof and application of the alloy-loaded Pd-Cu-Ho trimetal catalyst in acetylene semi-hydrogenation reaction. The alloy loaded Pd-Cu-Ho three-metal catalyst comprises a carrier and an active component, the carrier is an AlCoCrFeNi2.1 alloy, and the active component is composed of three metals of Pd, Cu and Ho. The invention provides the application of the alloy loaded Pd-Cu-Ho trimetal catalyst in acetylene semi-hydrogenation reaction, and the alloy loaded Pd-Cu-Ho trimetal catalyst shows excellent activity, ethylene selectivity and catalyst stability.

Disclosed is a process for producing a jet fuel, comprising a step of converting an alcohol stream in a fluidized bed, a jet fuel and a plant associated with said process. The process involves the following steps:(a) converting a C1 to C6 alcohol stream to produce a mixture containing paraffins, olefins, aromatics, and water;(b) separating water from the mixture;(c) oligomerizing olefins; and(d) alkylating aromatics from the mixture;(e) forming a stream of hydrocarbons to be hydrogenated;(f) hydrogenating the stream of hydrocarbons to be hydrogenated;(g) recovering at least one jet fuel fraction from the hydrogenated hydrocarbon stream.Conversion step (a) is carried out in a reaction zone comprising at least one fluidized catalytic bed.In the mixture of paraffins, olefins, aromatics and water produced in conversion step (a), the ratio of the mass of C3+ olefins to the total mass of olefins is greater than or equal to 0.8.

The invention provides an acetylene selective hydrogenation catalyst and a preparation method and application thereof. The catalyst can convert acetylene in C2 fraction into ethylene through selective hydrogenation. The catalyst comprises a main active component, an auxiliary active component and a carrier, distribution of metal active components is controlled by regulating and controlling the type, number and density of oxygen-containing groups of the carrier, the metal utilization rate is increased, meanwhile, the green oil generation amount is reduced, and better ethylene selectivity is obtained.

A method for producing liquid organic hydrogen carriers (LOHCs). The method includes passing a hydrocarbon feed stream rich in aromatics to a selective hydrogenation reactor configured to saturate olefins selectively without aromatic saturation to generate a hydrotreated feed stream; passing the hydrotreated feed stream to a fractionation unit to form a light fraction stream and a heavy fraction stream split at 218℃ to 250℃; and passing the light fraction stream to an aromatics extraction unit to form an aromatic compounds stream. The method also includes passing the non-aromatic compounds stream to a naphthene separator to generate a naphthenic stream; passing the aromatic compounds stream, the naphthenic stream, and an input hydrogen stream to a hydrogenation unit to form a hydrotreated effluent stream; and passing the hydrotreated effluent stream to a separator to remove unsaturated compounds to isolate the saturated compounds as a LOHC stream.

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 relates to a method for treating plastic pyrolysis oil, comprising the steps of: hydrotreating a feedstock in the presence of hydrogen and a catalyst; separating / washing the hydrotreated effluent in the presence of an aqueous solution; obtaining a first aqueous effluent and a hydrotreated hydrocarbon effluent; separating H2S contained in the first aqueous effluent; obtaining a gas phase containing H2S and a second aqueous effluent; the gas phase containing H2S can be at least partially recycled upstream of step b); separating NH3 contained in the second aqueous effluent; obtaining a gas phase containing NH3 and a third aqueous effluent. The present invention makes it possible to reduce the consumption of sulfurizing agents to maintain the catalyst in sulfide form in a low sulfur content feedstock by recycling the H2S resulting from the method.

The present invention relates to a method for treating plastic pyrolysis oil, the method comprising: a) treating a plastic pyrolysis oil in the presence of hydrogen and at least one selective hydrogenation catalyst at a temperature of 100-150°C, a hydrogen partial pressure of 1.0-10.0 MPa (absolute), and an hourly space velocity of 1.0-10.0 h -1 a) selectively hydrogenating a feedstock at a temperature between 250 and 370°C and a hydrogen partial pressure between 1.0 and 10.0 MPa (absolute) to obtain a hydrogen effluent; b) hydrotreating the hydrogen effluent in the presence of hydrogen and at least one hydrotreating catalyst at a temperature between 250 and 370°C and a hydrogen partial pressure between 1.0 and 10.0 MPa (absolute) to obtain a hydrotreated effluent; c) separating the hydrotreated effluent originating from step b) in the presence of an aqueous stream at a temperature between 50 and 370°C to obtain at least one gaseous effluent, one aqueous liquid effluent and one hydrocarbon liquid 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.

The present invention relates to a process for manufacturing aliphatic C3−C5 aldehydes, aliphatic C9−C13 alcohols from plastic waste and chemical products based on aliphatic C3−C5 aldehydes and aliphatic C9−C13 alcohols from plastic waste. The process further comprises separating a steam cracker feedstock from a liquid stream comprising at least one pyrolysis oil which is preferably manufactured from plastic waste. The liquid stream is converted in a first hydroprocessing step, a stream depleted in organic compounds comprising C−C double bonds and / or C−C triple bonds is then separated from the hydroprocessed liquid stream and subjected to a second hydroprocessing step to produce a steam cracker feedstock stream from the hydroprocessed stream.

The invention relates to a hydrocarbon fluid comprising 75 to 95% by weight of isoparaffins and less than 500 ppm by weight of aromatics relative to the total weight of the hydrocarbon fluid, said fluid having an initial boiling point and a final boiling point in the range of 120 to 240°C and a flash point of less than 90°C. The invention also relates to the use of the hydrocarbon fluid according to the invention as a solvent, for example in a paint, material coating, material treatment, sealant, polymerization, aerosol, cleaning or water treatment composition.

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.

A liquid / gas reactor comprises: a primary catalyst bed having an inlet and outlet end; means for supplying a primary feed stream to the inlet end; a secondary catalyst bed having an inlet and outlet end; means for supplying a secondary feed stream to the inlet end; means for collecting at least partially converted liquid product from the outlet end of the primary catalyst bed and recycling at least a portion of the liquid product to the inlet end of the primary catalyst bed and secondary catalyst bed; a separating wall between the primary catalyst bed and secondary catalyst bed; means for supplying a primary gas stream only to the inlet end of the primary catalyst bed; and means for supplying a secondary gas stream only to the inlet end of the secondary catalyst bed. A process for carrying out a gas / liquid reaction using the reactor is also disclosed.

A first aspect of the present invention is a method for producing a stabilized hydrocarbon product from a solid feedstock, the method comprising: providing a solid feedstock for pyrolysis; guiding the solid feedstock for pyrolysis into a pyrolysis process to provide a fluid product and a solid phase of pyrolysis; introducing, as a crude feedstock, at least an amount of the fluid product of pyrolysis and an amount of hydrogen, and contacting the crude feedstock with a catalytically active material in hydrogenation of conjugated diolefin carbon-carbon bonds under conditions active for hydrogenation of conjugated diolefin carbon-carbon bonds. In the production method, the ratio between hydrogen and the crude feedstock is 1 Nm 3 / m 3 ~100 Nm 3 / m 3 characterized in that it relates to the production method. This has the associated advantage that such a method requires only a small amount of hydrogen while providing a stabilized hydrocarbon product for transportation.

A method of producing a fuel additive includes passing a feed stream comprising C4 hydrocarbons through a methyl tertiary butyl ether unit producing a first process stream; passing the first process stream through a selective hydrogenation unit producing a second process stream; passing the second process stream through an isomerization unit producing a third process stream; and passing the third process stream through a hydration unit producing the fuel additive and a recycle stream.

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.