40results about How to "Improve nitrogen tolerance" patented technology

The invention describes a hydrocracking catalyst, and a preparation method and an application thereof. The hydrocracking catalyst comprises an acid component and an active metal component compound, wherein the acid component comprises at least one molecular sieve; the active metal component compound comprises a compound of Mo and/or W in a VIB group and a compound of Ni and /Co in a VIII group; and in a hydrocracking reaction state, the active metal component compound in the hydrocracking catalyst is in a metal phosphatizing state. The catalyst has excellent usage performance, good catalyst activity and high selectivity for medium oil under the condition of high nitrogen content in raw oil, is suitable for hydrocracking processes for increasing jet fuels and clean diesel oil, has stronger adaptability for nitrogen, and can reduce burden of a refining catalyst.

The invention relates to a method for preparing a high-performance hydrocracking catalyst, which comprises the following steps: preparing amorphous aluminium-silicon into a paste material of which the pH value is between 3.0 and 5.5, evenly mixing Y zeolite solid powder of modified rare earth with the paste material of the amorphous aluminium-silicon, and then drying and dehydrating the mixture to prepare a moldable paste so as to prepare a catalyst carrier through molding, drying, and calcining, and finally obtaining the final hydrocracking catalyst by loading hydrogenation metal components through an impregnation method. The hydrocracking catalyst prepared by the method has the advantages of high activity and middle oil selectivity, and strong nitrogen resisting performance and water resistance, thus the hydrocracking catalyst can be used in the process of an unrefined single-stage hydrocracking, which not only can be used for processing heavy oil fraction of oil, but also can be used for processing heavy raw materials of other sources, such as the heavy distillate of coal liquefaction oil.

The invention relates to a catalytic cracking diesel oil hydro-upgrading catalyst and applications thereof. The catalyst is composed of VIII-group and VIB-group hydrogenation active metal components and a carrier containing a modified Y molecular sieve, amorphous silicon aluminum and alumina; the modified Y molecular sieve is prepared from a NaY molecular sieve by the steps of carrying out ammonium exchange twice, carrying out roasting one time and carrying out hydro-thermal treatment one time. The catalyst is used for carrying out hydro-upgrading on distillate or catalytic cracking diesel oil at a temperature of 160-380 DEG C. After inferior diesel distillate of which the sulfur content is higher than 1000 mu g/g, the nitrogen content is higher than 1000 mu g/g, the aromatics content is higher than 55v% is treated by using the catalyst, the desulfurization rate and the denitrification rate are both higher than 98%, the cetane number is increased by more than 10 units, and the yield of the diesel distillate is over 98wt%.

The invention relates to a method for catalyzing diesel oil to realize hydrogenation dearomatization. The method comprises the following steps that: distillation range of catalyzing diesel oil feeding is at a temperature of between 150 and 380 DEG C; in the presence of hydrogen, a reaction is carried out, the reaction temperature is between 330 and 370 DEG C, the hydrogen partial pressure is between 6 and 9 MPa, the hydrogen-oil volume ratio is between 500:1 and 1,000:1 and the liquid hourly volume space velocity is between 1.0 and 2.0 hr-1; the compositions in percentage by weight of a catalyst are: 15 to 40 percent of amorphous silica alumina, 5 to 30 percent of aluminum oxide, 10 to 40 percent of VIB group metal oxide, 1 to 15 percent of VIII group metal oxide and 5 to 30 percent of Beta/Y molecular sieve; moreover, the total weight of the compositions is counted as 100 percent. The method has the advantages that: diesel oil yield is more than 97 weight percent, and the dearomatization rate of diesel oil reaches to above 60 percent; meanwhile, total desulfurization rate and total denitrification rate reach above 98.5 percent, and product density is reduced by above 0.0400g/cm3.

The invention describes a preparation method of a metal phosphide type hydrocracking catalyst. The method comprises the following steps of (1) preparing a catalyst carrier containing a molecular sieve and an inorganic refractory oxide; (2) preparing a dipping solution containing a VIB group metallic compound, a VIII group metallic compound and an inorganic phosphorus-containing compound; (3) dipping the catalyst carrier obtained for the step (1) with the dipping solution prepared by the step (2), and then drying the dipped material; and (4) performing hydrogen activation on the material obtained from the step (4), obtaining the hydrocracking catalyst used for hydrocracking reactions after the activation. The hydrocracking catalyst prepared by the method has outstanding usage performance, and is particularly suitable for a hydrocracking process of increasing middle distillates.

The invention relates to a method for hydro-dearomatization in catalytic cracking of diesel. According to the invention, Ni and W are adopted as hydrogenation active metal components of a catalyst and modified Y molecular sieve, modified Beta molecular sieve, amorphous silica-alumina and alumina are adopted as carriers of the catalyst, wherein the average crystal size of the modified Y molecular sieve is 100-400nm, the mole ratio of SiO2/Al2O3 is 5-40:1; the relative crystallinity is greater than 90% and the specific surface area is 700-1000m<2>/g; the average crystal size of the modified Beta molecular sieve is 50-200nm, the mole ratio of SiO2/Al2O3 is 50-200:1; the relative crystallinity is greater than 85% and the specific surface area is 700-900m<2>/g. When the method is adopted to process inferior diesel fraction, the desulfurization rate and the denitrification rate are up to more than 97.5%, the dearomatization rate is up to more than 55% and the diesel fraction yield is up to more than 98wt%.

The present invention discloses a preparation method of a hydrocracking catalyst. The method of the present invention includes the following steps: (1) preparing a catalyst carrier containing a molecular sieve and an inorganic refractory oxide; (2) preparing a dipping solution containing a VIB group metallic compound, a VIII group metallic compound and a hydrazine derivative, (3)dipping the catalyst carrier obtained in the step (1) in the dipping solution obtained in the step (2), and then drying the carrier; and (4) activating the materials obtained in the step (3) by using hydrogen, so as to obtain the hydrocracking catalyst used for the hydrocracking reaction after the activation. The hydrocracking catalyst provided by the invention has high activity, and the preparation method is simple, can be used for the treatment of heavy hydrocarbon materials and can produce middle distillates by the maximum amount.

The invention describes a preparation method for a hydrocracking catalyst. The method comprises the following steps of (1) preparing a catalyst carrier containing a molecular sieve and an inorganic refractory oxide; (2) preparing a dipping solution containing a VIB group metallic compound and/or a VIII group metallic compound; (3) dipping the catalyst carrier obtained from the step (1) with the dipping solution prepared by the step (2), and then drying the dipped material; (4) preparing an inorganic phosphorus-containing compound solution, dipping the material obtained from the step (3), and drying the dipped material; (5) performing heat treatment on the material obtained from the step (4) in an air atmosphere; and (6) performing hydrogen activation on the material obtained from the step (5), and obtaining the hydrocracking catalyst used for hydrocracking reactions after the activation. The hydrocracking catalyst prepared by the method has outstanding usage performance, and is particularly suitable for a hydrocracking process of increasing middle distillates.

The invention describes a preparation method for a metal phosphide type hydrocracking catalyst. The method comprises the following steps of (1) preparing a catalyst carrier containing a molecular sieve and an inorganic refractory oxide; (2) preparing a dipping solution containing a VIB group metallic compound and/or a VIII group metallic compound; (3) adding simple substance phosphorus in the dipping solution prepared by the step (2), performing ultrasonic wave dispersion, dipping the catalyst carrier obtained from the step (1), and drying the dipped carrier; and (4) performing hydrogen activation on the material obtained from the step (3), and obtaining the hydrocracking catalyst used for hydrocracking reactions after the activation. The hydrocracking catalyst prepared by the method has outstanding usage performance, and is particularly suitable for a hydrocracking process of increasing middle distillates.

The invention relates to a coal tar hydrocracking catalyst and a preparation method thereof. The method comprises the steps of: preparing amorphous silicon aluminium into a slurry with pH value of 3.0-5.5; evenly mixing a modified Y molecular sieve solid powder and the amorphous silicon aluminum slurry; then dehydrating the mixture to prepare a shapable paste; molding, drying and roasting the paste to prepare a catalyst carrier; and finally loading and hydrogenating a metal component by an impregnation method to obtain the final hydrocracking catalyst. The amorphous silicon aluminum is prepared by a carbonization method, and the silicon needed in the reaction is introduced through an alkaline silicon-containing material. The hydrocracking catalyst produced by the method provided by the invention has high activity, high middle distillate selectivity, strong nitrogen resistance and water resistance, and can be used for hydrocracking process of coal tar.

The present invention discloses a preparation method for a middle distillate-type hydrocracking catalyst. The method of the present invention includes the following processes: (1) preparing a catalyst carrier containing zeolite(s) and an inorganic refractory oxide(s); (2) preparing a phosphorus-containing compound solution, dipping the catalyst carrier obtained in step (1), and then drying the carrier; (3) preparing a VIB group metal compound and VIII group metal compound-containing dipping solution; (4) dipping the materials obtained in step (2) in the dipping solution prepared in step (3), and then drying; (5) performing a heat treatment in the air atmosphere to the materials obtained in step (4); and (6) activating the materials obtained in step (5) after the heat treatment by using hydrogen, and obtaining the hydrocracking catalyst used for the hydrocracking reaction after the activation. The hydrocracking catalyst prepared by the method of the present invention has more prominent usability, and is particularly applicable to the hydrocracking process for maximum production of middle distillates.

The present invention discloses a preparation method of a middle distillate-type hydrocracking catalyst. The method of the present invention includes the following steps: (1) preparing a catalyst carrier containing a molecular sieve and an inorganic refractory oxide; (2) preparing a solution containing a hydrazine derivative, dipping the catalyst carrier obtained in the step (1), and then drying the carrier; (3) preparing a dipping solution containing a VIB group metal compound and a VIII group metal compound; (4) dipping the materials obtained in the step (2) in the dipping solution prepared in the step (3), and then drying; (5) performing a heat treatment at 200-450 DEG C in the air atmosphere to the materials obtained in the step (4) for 1-6 h; and (6) activating the materials obtained in the step (5) after the heat treatment by using hydrogen, so as to obtain the hydrocracking catalyst used for the hydrocracking reaction after the activation. The hydrocracking catalyst provided by the invention is used for the treatment of heavy hydrocarbon materials, does not require prevulcanization, has low inactivation rate, and can facilitate the highest-yield production of middle distillates.

The invention discloses a method for preparing ternary complex carrier supported nickel phosphide catalyst, comprising the following steps: preparing a SiO2-TiO2-Al2O3 composite support from raw materials including a silicon-containing compound such as the ethyl orthosilicate, activated alumina particles and butyl titanate by adopting the improved sol-gel process, impregnating, drying and calcinating at high temperature to obtain the precursor of the catalyst by using nickel nitrate and diammonium phosphate, and finally carrying out the temperature-programmed reduction to obtain the catalyst. Due to the introduction of the SiO2, the degree of crystallinity of the active phase of nickel phosphide is improved, the acidity of the catalyst is decreased, the adsorption of the nitrogen-containing compound in the oil on the surface of the catalyst is reduced, the problem on the deactivation of the catalyst due to coking and carbon depositing is avoided, and the catalyst has excellent oil hydrodesulfurization and hydrodenitrification performance.

The invention provides a planting method of selenium-enriched and zinc-enriched rice. The method includes the following specific steps: (1) soaking seeds in water, then taking the seeds out and drip-dried the seeds, steaming the seeds in a water bath, and planting the steamd wet seeds to produce rice seedlings; (2) before transplanting, applying a soil conditioner rich in selenium and zinc to thesoil to be used for transplanting; (3) transplanting the rice seedlings to the soil applied with the soil conditioner rich in selenium and zinc when the rice seedlings reach 20-40 cm; (4) when the transplanted rice seedlings reach a stage between tillering and jointing, applying a selenium-enriched foliar fertilizer; (5) irrigating rice after applying the selenium fertilizer and maintaining the soil being wet. The method provided by the invention increases the content of selenium and zinc in the soil, and prevents heavy metal ions from entering the rice, thus increasing the content of seleniumand zinc in the rice. And the using cost is low, the operation is simple, and the cultivating method can be extensively used.