30results about How to "Improve nitrogen resistance" patented technology

The invention discloses a preparation method of a nitrogen-resisting hydrocracking catalyst. The preparation method comprises the following steps: 1, uniformly mixing a modified Y type molecular sieve, amorphous silicon-aluminum and / or aluminum oxide, adding dilute nitric acid, carrying out slurrying, then performing extrusion molding, and performing drying and calcination to obtain a silicon-aluminum carrier containing the modified Y type molecular sieve; and 2, performing impregnation on the carrier of the step 1 by adopting impregnation liquid containing an active metal, drying the impregnated carrier and calcining the dried carrier to obtain the hydrocracking catalyst, wherein the modified Y type molecular sieve has the following characteristics: the crystal cell constant of the modified Y type molecular sieve is 2.425-2.455nm; the bulk phase silicon-aluminum ratio is 8-30, wherein the surface layer silicon-aluminum ratio is 20-80, and the surface layer silicon-aluminum ratio is higher than the bulk phase silicon-aluminum ratio; and the specific surface area of the modified Y type molecular sieve is 600-800m<2> / g, and the pore volume is 0.40-0.70ml / g. The hydrocracking catalyst prepared by the preparation method disclosed by the invention has good reactivity and nitrogen resistance, and can be applied to different hydrocracking reaction processes such as a process for increasing the production of diesel oil, a process for increasing the production of chemical raw materials, and a process for catalyzing diesel oil hydro-conversion and the like.

The present invention relates to a hydrocracking catalyst containing compound molecular sieve and its preparation method. Said catalyst composition uses amorphous aluminosilicate and a compound molecular sieve as carrier, in which the amorphous aluminosilicate content is 30-60% of catalyst weight, compound molecular sieve content is 1-20% of catalyst weight, and is the mixture of modified Y molecular sieve and SAPO molecular sieve, VIB group metal oxide content is 10-40%, VIII group metal oxide content is 1-20% of IVB group metal oxide content is 1-10%. Said invented catalyst is prepared by adopting co-precipitation method, and its strength and performance can be raised and improved.

The invention discloses a preparation method and application of a modified Y molecular sieve and a single-stage hydrocracking catalyst. The method comprises the following contents: (1) carrying out ammonium salt ion exchange on NaY zeolite as a raw material; (2) carrying out isomorphous substitution treatment on the Y molecular sieve in the step (1); (3) carrying out hydro-thermal treatment on the Y molecular sieve treated in the step (2); (4) carrying out acid dealumination treatment on the Y molecular sieve treated in the step (3); (5) carrying out fast drying treatment on the Y molecular sieve treated in the step (4); (6) carrying out carbon deposit reaction on the Y molecular sieve obtained in the step (5); (7) carrying out desilicication treatment on the molecular sieve obtained in the step (6); and (8) filtering and drying the Y molecular sieve subjected to desilicication treatment in the step (7) and carrying out charking treatment to obtain a modified Y molecular sieve. The single-stage hydrocracking catalyst prepared from the modified Y molecular sieve prepared through the method is applied to a single-stage hydrocracking process and has good reaction activity and nitrogen resistance.

The invention discloses a preparation method for a hydrocracking catalyst. The method comprises the following steps: 1) uniformly mixing a modified Y molecular sieve, amorphous silicon aluminum and / or aluminum oxide, adding dilute nitric acid, pulping, extruding into a strip, drying and baking, thereby acquiring a silicon aluminum carrier containing the modified Y molecular sieve, wherein the mass percent of the modified Y molecular sieve in the silicon aluminum carrier is 1%-13%, preferably 2%-10% and the balance is amorphous silicon aluminum and / or aluminum oxide; 2) adopting a steeping liquor containing active metal for steeping the carrier in the step (1), drying and baking the steeped carrier, thereby acquiring the hydrocracking catalyst. The hydrocracking catalyst prepared according to the method disclosed by the invention has excellent reactivity and nitrogen resistance and is especially suitable for a single segment hydrocracking technology.

The invention discloses a nitrogen-resistant hydrocracking catalyst and a preparation method thereof. Based on the total weight of the catalyst, the catalyst comprises the following components: 55% to 85% of a silicon-aluminum carrier containing modified Y molecular sieve, and the active metal is calculated as a metal oxide. is 15%~45%; the mass percentage of the modified Y molecular sieve in the silica-alumina carrier is 15%~90%, and the balance is amorphous silica-alumina and / or alumina; the unit cell constant of the modified Y molecular sieve is 2.425~2.455nm; the bulk silicon-aluminum ratio is 8~30, of which the surface layer silicon-aluminum ratio is 20-80, and the surface layer silicon-aluminum ratio is higher than the bulk phase silicon-aluminum ratio; the specific surface area of ​​modified Y molecular sieve is 600~800m2 / g ; Pore volume 0.40~0.70ml / g; Infrared acid content 0.3~1.5mmol / g; Relative crystallinity 70~110%. The hydrocracking catalyst of the invention has good reactivity and nitrogen resistance.

The invention discloses a preparation method for a single segment hydro-cracking catalyst. The method comprises the following steps: 1) uniformly mixing modified Y molecular sieve, amorphous form aluminum silicon and / or aluminum oxide, adding dilute nitric acid, pulping and then extruding a strip and forming, drying and roasting, thereby acquiring an aluminum silicon carrier containing the modified Y molecular sieve, wherein the mass percent of the modified Y molecular sieve in the aluminum silicon carrier is 1%-13%, preferably, 2%-10%, and the balance is amorphous form aluminum silicon and / or aluminum oxide; 2) adopting a steeping liquor containing active metal for steeping the carrier acquired in the step (1), drying and roasting the steeped carrier, thereby acquiring the hydro-cracking catalyst. The single segment hydro-cracking catalyst prepared according to the method disclosed by the invention has excellent reaction activity and nitrogen resistance in a single segment hydro-cracking process.