139results about How to "Improve hydrodesulfurization activity" patented technology

A hydrogenation method for producing high-quality diesel oil and high-quality reforming materials comprises the following steps of: mixing diesel oil and/or a light wax oil material with hydrogen gas, and sequentially contact-reacting with a hydrorefining catalyst and a hydrocracking catalyst without middle separation, cooling the reaction result, and separating to obtain a light naphtha fraction, a heavy naphtha fraction, a kerosene fraction, a diesel oil fraction and a tail oil fraction, wherein the kerosene fraction and/or the tail oil fraction can be directly extracted or partially or completely recycled back to the reaction system. By adopting single-stage once-through process and a non-noble metal catalyst, the invention can produce the reforming materials with high aromatic content and the diesel oil fraction with high cetane number, wherein the yield of the reforming material is larger than 20wt%, and the cetane number of the diesel oil fraction can be improved by more than 15 units. The method provided by the invention has high operation flexibility and can flexibly adjust the technical scheme according to different raw materials and different product scheme requirements.

A polymetallic bulk catalyst for diesel oil hydrodesulfurization is provided. The particle diameter of the present invention is 10-100 nm, and the present invention consists of a species of VIII metal and two species of VIB metal, wherein, the mole ratio of the VIII metal and the VIB metal is 1:9-9:1, while the mole ratio of two species of VIB metal is 1:5-5:1. The preparation method is that: a) the basic carbonate of VIII metal is led to dissolve in solvent to form suspension liquid; b) two species of metal salts of the VIB metal are led to dissolve in the solvent, and surfactant is added into the solvent, stirred and heated to 50-250 DEG C; c) the suspension liquid in step a is added into the solvent in step b and led to react in reflux for 4-25 hours under 50-250 DEG C; d) the product obtained in step c is filtered, washed and dried to obtain target product. The catalyst of the present invention is used in the ultra-deep hydrodesulfurization of diesel oil and shows extremely high hydrodesulfurization activity. Under the same operating conditions, the activity of the present invention is 5.9 times as much as industrial reference agent.

The process of treating hydrogenation catalyst before application includes making the hydrogenation catalyst in oxide state to support organic acid and/or organic nitrogen compound, organic solvent and element sulfur and treating in dynamic heating equipment. The hydrogenation catalyst with supported sulfur containing matter, such as element sulfur, has raised sulfur containing matter utilization rate, smooth temperature raising in the catalyst bed, raised catalyst activity and other features. The method of the present invention may be applied for various kinds of hydrogenation catalyst.

A hydrocatalyst for decreasing S and olefine contents in poor gasoline and increasing its octane value is prepared from the metallic active component which is two or three of MoOe, CoO and NiO and the carrier prepared from TiO2, modified ZSM-5 molecular sieve and adhesive.

A process for selective hydrodesulfurization of a sulfur and olefin-containing hydrocarbon feedstock boiling in the naphtha or gasoline boiling range utilizing a particularly defined high activity hydrodesulfurization (HDS) catalyst composition comprising a cobalt component, a molybdenum component and little or no phosphorus, prepared on a special alumina support containing a low concentration of silica and having a high surface area of at least 280 m²/g. In another aspect the process involves separating the feedstock into a light and a heavy fraction, followed by selectively hydrodesulfurizing the heavy fraction using a particularly defined high activity HDS catalyst and hydrodesulfurizing the light fraction with a particularly defined high selectivity HDS catalyst. The process also includes performing the separation into fractions and the selective hydrodesulfurization of the fractions in a distillation column reactor utilizing different particularly defined HDS catalysts.

A process for treating the hydrocatalyst before it is used features that the organic solvent and sulfur-contained substance are introduced to the oxidation-state hydrocatalyst for higher activity.

The invention discloses a hydrofining catalyst containing molybdenum and/or tungsten and nickel and/or cobalt, wherein the catalyst comprises a heat-proof inorganic oxide carrying agent and molybdenum and/or tungsten or tungsten and nickel and/or cobalt loaded on the carrying agent, wherein the catalyst is prepared through immersing the heat-proof inorganic oxide carrying agent with dipping solution containing molybdenum and/or tungsten and nickel and/or cobalt compound. The catalyst prepared by the process provided by the present invention has higher hydrogenation desulfurization activity than the conventional catalyst.

The invention relates to a processing method before the application of hydrogenation catalyst, comprising the detailed process as follows: organic solvent, elemental sulfur and water are introduced in oxidated hydrogenation catalyst; subsequently, heating predisposal is carried out under a certain condition. The processing method before the application of the hydrogenation catalyst loads the sulfur-contained substance such as the elemental sulfur to the hydrogenation catalyst; a certain interaction is generated and little heat is discharged; and the water vapor which is generated during the heat disposal process of the added water adjusts the interaction of the sulfur and the catalyst and reduces the heat discharging degree during the heat disposal process. Compared with the prior art, the catalyst obtained by the method has the advantages of high utilization ratio of the sulfur-contained matter, gradual increment of the temperature of the catalyst bed and high activity of the catalyst when the activation is applied. The method can be used for processing before the application of various hydrogenation catalysts.

A process for preparing the catalyst containing the S and the atom cluster compound of transition metal (Mo or W) and used for hydrodesulfurizing is disclosed. Said atom cluster compound of Mo or W is prepared from its oxide through electrolyzing in acid solution, sulfurizing, oxidizing, concentrating, separation and chemical reaction. Its advantage is high hydrodesulfurizing performance.

The invention relates to a hydrotreatment catalyst and an application thereof. The catalyst comprises a carrier and hydrogenation active metal components loaded on the carrier. The catalyst is characterized in that the hydrogenation active metal components are nickel, cobalt and molybdenum. In terms of oxides based on the weight of the catalyst, the sum of the contents of nickel and cobalt is 2-10wt% and the content of molybdenum is 10-30wt%, wherein the atomic ratio of nickel to cobalt is 1.4-10. The catalyst is suitable to be used in hydrocarbon oil hydrotreatment for preparing clean oil products.

The invention provides a hydrogenation catalyst for polycyclic aromatic hydrocarbons. The hydrogenation catalyst is a molybdenum disulfide (MoS2) catalyst prepared in a microemulsion system. The molybdenum disulfide catalyst provided by the invention has the advantages of sulfur tolerance, high hydrodesulfurizing activity, high polycyclic-aromatic-hydrocarbon hydrogenation activity, simplicity in process operation, and the like.

The invention discloses a preparation method for a low-quality diesel hydrofining catalyst, which is characterized in that the low-quality diesel hydrofining catalyst comprises an active component, a carrier and an additive; the active component is composed of one or more than one metal of both VIB group and VIII group; the carrier is composed of a multi-orifice AFI, an AEL molecular sieve and a Gamma-Al2O3; the additive is one or more than one of SiO2, TiO2, F and P; and the weight contents of the components are respectively as follows: 5-30 wt percent of the multi-orifice AFI and the AEL molecular sieve, 12-25 wt percent of metals of the VIB group, 3-15 wt percent of metals of the VIII group, 0-15 wt percent of additive, and the balance Gamma-Al2o3. According to the method, the specific surface area is 200-300 m<2>/g, the pore size is 0.30-0.80 cm<3>/g, the average pore diameter is 6-15 nm, and the mechanical strength is not lower than 15 N/mm.

The invention provides a method for preparing sulfuration-type gasoline selective hydro-desulfurization catalyst. A main content of the method is characterized in that hydrogenation active metal elements of the gasoline selective hydro-desulfurization catalyst are combination of Co and Mo, the hydrogenation active metal element Co is introduced and is calcinated, the hydrogenation active metal element Mo is introduced by employing an impregnation method and then is dried, the dried catalyst is directly and rapidly procured in short time without calcination, preferably, surface sulfur polymer reduction operation can be carried out. The catalyst has obvious usage performance by the method, and the method has the advantages of simple precuring step, short on-stream time of the catalyst, low heat energy consumption, less amount of a toxic vulcanizing agent which has easy corrosion performance, and low production cost.

The invention provides a carrier of hydrogen desulfurization catalyst and a preparation method and catalyst prepared by the preparation method. The preparation method of the carrier includes performing contact exchange of high-aluminum and -silica ratio ammonium nitrate by a Y molecular sieve of small particles; performing zirconium modification of the exchanged Y molecular sieve to obtain Zr-modified Y sieve; mixing the Zr-modified Y molecular sieve with pseudo-boehmite, extrusion aid and adhesives, extruding, drying and roasting to obtain the carrier of the hydrogen desulfurization catalyst. The carrier of the hydrogen desulfurization catalyst has the Zr-modified Y sieve. The hydrogen desulfurization catalyst of the carrier is high in activity and good in desulfurization effect. The hydrogen desulfurization catalyst of the carrier is used for hydrogen desulfurization, and yield of diesel oil is up to 100%.

The invention relates to a hydrotreating catalyst and application thereof. The catalyst contains a carrier, and a metal component of family VIII and a metal component of family VIB which are loaded on the carrier. The catalyst is characterized in that the carrier contains heat-proof inorganic oxide, molecular sieves and charcoal, the carrier is prepared by a method in which the heat-proof inorganic oxide and/or the precursors of the heat-proof inorganic oxide, and the molecular sieves, carbon black powder and/or the precursors of charcoal are mixed, molded, dried and activated, wherein activation comprises the following steps: (1) under the existence of isolated air and/or inert gas, carrying out heating treatment to a molded material subjected to drying, keeping the heating treatment temperature at 400-800 DEG C, and maintaining the time for 0.5-8 hours; (2) under the ambience of water vapor and/or carbon dioxide, carrying out heating treatment to a product obtained in step (1), keeping the heating temperature at 600-950 DEG C, maintaining the time for 0.3-4 hours, and enabling the flow rate of the water vapor and/or carbon dioxide to be 50-500 normal liters/kilogram.hour. The catalyst is suitable for hydrotreatment of hydrocarbon oil so as to prepare a clean oil product.

The invention provides a combination catalyst for diesel hydrodesulfurization and a diesel deep hydrodesulfurization method. The combination catalyst comprises a first catalyst CAT-1 and a second catalyst CAT-2, wherein the first catalyst CAT-1 is prepared by drying and roasting after carrying an active component on a first support, and the first support is selected from a composite of two or three of TiO2, SiO2 and Al2O3; the second catalyst CAT-2 is prepared by carrying an active component on a second support, and the second support is selected from a composite of two or three of TiO2, SiO2 and Al2O3; and the active components of the two catalysts are selected from a combination of two or three of Co, Mo, Ni and W. The two catalysts are combined and filled according to a certain proportion; and the temperature gradient variation or step-by-step temperature control in the reaction process is utilized to fully display the characteristics of the two catalysts, so that the sulfur content in the diesel is reduced to 10 mu g/g below.