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

The invention relates to a method for catalyzing diesel oil hydrogenation dearomatization. The distillation range of catalytic diesel feed is 150-380°C; in the presence of hydrogen, the reaction temperature is 330-370°C, the hydrogen partial pressure is 6-9MPa, and the hydrogen oil The volume ratio is 500:1~1000:1, the liquid hourly volume space velocity is 1.0~2.0hr-1; the catalyst composition is by weight: amorphous silicon aluminum: 15~40wt%, alumina: 5~30wt%, VIB Group metal oxide: 10-40wt%, Group VIII metal oxide: 1-15wt%, Beta / Y molecular sieve: 5-30wt%, the total weight of each component is 100wt%; the yield of diesel oil is above 97wt%, and the The removal rate of aromatics is above 60%, the removal rate of total sulfur and total nitrogen is above 98.5%, and the density of the product is reduced by more than 0.0400g / cm3.

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 discloses a method for preparing a medium-oil hydrocracking catalyst containing metal nitrides, comprising the following steps: (1) preparing a catalyst carrier containing molecular sieves and inorganic refractory oxides; (2) preparing a hydrazine derivative solution, and impregnating the catalyst carrier in step (1), and then drying; (3) preparing an impregnating solution containing a metal compound of Group VIB and a metal compound of Group VIII; (4) impregnating the material obtained in step (2) with the impregnating solution prepared in step (3), Then dry; (5) The material obtained in step (4) is activated with hydrogen, and after activation, a hydrocracking catalyst for hydrocracking reaction is obtained. The hydrocracking catalyst of the present invention is used for processing heavy hydrocarbon materials and producing middle distillates in a maximum amount.

The invention discloses a hydrocracking catalyst. In terms of the weight of a catalyst carrier, the content of a molecular sieve is normally 2 to 45%, preferably, 4 to 15%; in terms of the weight of the catalyst, the content of a group VI-B metal component (in terms of the oxide of W and / or Mo) is normally 10 to 40%, preferably, 15 to 35%, most preferably, 18 to 28%, the content of a group VIII metal component (in terms of the oxide of Ni and / or Co) is normally 1 to 10%, preferably, 2 to 9%, most preferably, 4 to 8%, and the content of elemental nitrogen is 1 to 1.5%, preferably, 1.2 to 1.4%. The hydrocracking catalyst provided by the invention is used for treating heavy hydrocarbon materials and can realize maximum production of intermediate distillate oil.

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 present disclosure provides a method for planting selenium-rich and zinc-rich rice. The specific steps of the method are: (1) first soak the seeds in water, then remove and drain, and fumigate in a water bath, and then fumigate the seeds Seeds are sown in moisture to grow rice seedlings; (2) before transplanting, apply a zinc-rich and selenium-rich soil conditioner to the transplanted soil; (3) when the rice seedlings grow to 20-40cm, transplant the rice seedlings (4) Then, between the rice seedling growth after transplanting and the tillering stage to the jointing stage, apply selenium-enriched foliar fertilizer; (5) apply selenium-enriched fertilizer Afterwards, the rice is irrigated to keep the soil moist. The method increases the content of selenium and zinc in the soil, can block heavy metal ions from entering rice, enhances the content of selenium and zinc in rice, has low use cost, simple operation and can be widely used.