35results about How to "High conversion capacity of heavy oil" patented technology

The present invention relates to a synthesizing method for a core-shell structure compound molecular sieve. The method mainly adopts a location growing method to fix a loaded phosphor aluminum or silicon aluminum molecular sieve on the surface of a ZSM-5 molecular sieve to compose the raw materials and then prepare a gel in a primarily wet state and crystallize under a constant temperature, thus synthesizing the core-shell structure compound molecular sieve. The method overcomes the defects of the prior technology, thus reducing the independent growing number of the composed phosphor aluminumor silicon aluminum molecular sieves, further improving the distribution of the phosphor aluminum or silicon aluminum molecular sieve of the shell on the surfaced of the ZSM-5 and reducing the grain diameter of the compound molecular sieve. When the core-shell structure compound molecular sieve prepared by the method is used for heavy oil catalytic cracking, the heavy oil converting rate and the low carbon olefin yield are all higher than the molecular sieve synthesized by the prior technology. Compared with the catalyst which only adopts the ZSM-5 molecular sieve as the active component, theheavy oil converting rate is improved by 2 to 3 percent; the ethylene yield is increased by 1 to 1.5 percent and the liquid gas yield is enhanced by 1.5 to 3.5 percent.

A hydrated alumina containing additive (0.5-40 Wt %) and with alpha-AlO (OH) structure for preparing the catalyst used for catalytic cracking reaction. Said additive is chosen from RE metal, La-familymetal, Si, Ga, B and P. Its preparing process includes such steps as mixing alpha-AlO (OH) with H2O and acid while stirring, ageing, and mixing with additive.

The invention provides a method for preparing a composite molecular sieve. The method comprises steps as follows: an aqueous solution of alkali and a molecular sieve are impregnated and mixed uniformly in a mass ratio of the molecular sieve (dry basis), alkali and H2O being (0.1-1):(0.01-1):(0.5-5), a solid mixture obtained by the impregnation is subjected to or not subjected to drying pretreatment and then is crystallized for 0.1-120 h at the temperature of 50-250 DEG C, and a composite molecular sieve product is obtained. According to the method, the Y molecular sieve is subjected to alkalitreatment, partial skeleton structure of the molecular sieve is dissolved properly, and content of secondary pores of the Y molecular sieve is increased. Meanwhile, silicon aluminum species dissolvedfrom the molecular sieve skeleton and residual alkali liquor further interact and are subjected to nucleation and crystallization again under a certain hydrothermal condition, and the nano ZSM-5 molecular sieve is generated. The USY / ZSM-5 composite molecular sieve has higher heavy oil conversion capacity, higher light oil yield and higher low-carbon olefin selectivity when applied to the heavy oilcracking reaction.

The invention provides a method for preparing a catalytic cracking catalyst for cracking coking wax oil and producing gasoline. The preparation method includes the following steps: (1) Preparation of Y-type molecular sieve modified by rare earth, phosphorus and magnesium: NaY molecular sieve is exchanged with ammonium salt and rare earth salt , and then carry out phosphorus and magnesium modification successively, which is characterized in that phosphorus modification is preceded by magnesium modification; (2) catalyst molding: mixing water, molecular sieve, clay, pseudo-boehmite and binder, beating, Spray drying and roasting; (3) Acid modification: mixing water and catalyst particles to make a slurry, adjusting the pH value, and filtering and drying. The catalyst prepared by the invention has good coker wax oil conversion ability and gasoline selectivity.

The invention provides a prolific gasoline catalytic cracking catalyst and a preparation method thereof. The catalyst comprises 15-70wt% molecular sieve, 15-60wt% clay, 8-30wt% pseudo-boehmite, 3-20wt% binder, and 0.01-2wt% phosphorus in terms of phosphorus, and 0.01-3wt% magnesium in terms of magnesium. The preparation method is as follows: (1) Preparation of Y-type molecular sieve modified by phosphorus and magnesium: mixing Y-type molecular sieve and phosphorus-containing compound for beating reaction, and then adding magnesium-containing compound to raise the temperature for reaction. (2) Preparation of modified matrix material: mix clay, pseudo-boehmite, binder and water for beating, add phosphorus-containing compound and stir evenly. (3) mixing and beating the above-mentioned phosphorus and magnesium modified Y-type molecular sieves and modified matrix materials, followed by successive steps of spray drying, washing, filtering and drying. The catalyst prepared by the invention has strong heavy oil conversion ability, good coke and gasoline selectivity, simple preparation process and easy industrial production.

A catalytic cracking catalyst and a preparation method thereof, based on the total weight of the catalyst, the catalyst contains 10-60% by weight of titanium and / or zirconium modified Y molecular sieve, 10-60% by weight of clay and 5-50% by weight of Binder; the titanium and / zirconium modified Y molecular sieve contains 1.0% to 15.0% by weight of titanium and / zirconium metal oxides. The catalyst preparation method includes the steps of preparing titanium and / or zirconium modified Y molecular sieve, preparing catalyst slurry and spray drying, wherein the titanium and / or zirconium modified Y molecular sieve includes the following steps: (1) adding titanium and / or The zirconium compound is dispersed in water, and the pH value of the mixture is adjusted to 3 to 10; (2) the molecular sieve is mixed with the mixture obtained in step (1), and stirred; optionally filtered and / or dried; (3) calcined at 300 to 700° C. . The catalyst has high heavy oil conversion capacity and gasoline yield.

A hydrocarbon catalytic conversion method for increasing propylene yield comprises the following steps: contacting a hydrocarbon raw material with a catalyst in a catalytic cracking reaction zone, contacting the obtained butylene-enriched C-4 fraction and / or olefin-enriched gasoline fraction with a catalyst with micropore modification in an oligomerization / cracking reaction zone to perform an oligomerization cracking reaction, separating to obtain a product rich in propylene, performing steam stripping and regeneration of the carbon deposited catalyst, dividing the carbon deposited catalyst into two parts, delivering one part to the catalytic cracking reaction zone for recycle, delivering the other part to a catalyst micropore modification zone, contacting and reacting with a modifier, and then delivering to the oligomerization / cracking reaction zone for recycle. According to the invention, with the method of micropore modification of the catalyst, the catalytic cracking catalyst containing dual active components of macroporous zeolites and medium pore zeolites is provided with not only high heavy oil conversion capability and high propylene selectivity for catalytic cracking of heavy hydrocarbon raw materials, but also high propylene selectivity for catalytic conversion of butylene and high-alkene gasoline, and thus the purpose of increasing propylene yield is reached.

A hydrotreatment combined catalytic cracking method for producing propylene comprises the following steps: carrying out a cracking reaction by allowing heavy raw materials to contact with a catalyst containing shape selective zeolite having an average aperture of below 0.7nm in first riser reactor, carrying out hydrotreatment of recycle cracked heavy oil in a fluidized bed reactor, carrying out a contact cracking reaction of the obtained hydrogenated recycle cracked heavy oil and the catalyst containing shape selective zeolite having an average aperture of below 0.7nm in a second riser reactor, and carrying out a contact reaction of the above obtained material and lightweight hydrocarbon oil. The method is used for the catalytic cracking of heavy oil, and realizes a high heavy oil conversion rate, a high propylene yield, a low dry gas yield and a low coke yield.

A catalytic conversion method for production of propylene, a petroleum hydrocarbon raw material and methanol are respectively contacted with a catalytic cracking catalyst in a petroleum hydrocarbon catalytic cracking reaction zone and a micropore modified catalytic cracking catalyst in a methanol catalytic conversion reaction zone to react, and separation is then carried out to obtain a propylene-rich product. a coked catalyst undergoes steam stripping and regeneration and then is divided into two parts: one part is directly sent into the catalytic cracking reaction zone to be recycled; and the other part is firstly sent into a catalyst micropore modification zone to be contacted with and react with a modifier, and then the other part is sent into the methanol catalytic conversion reaction zone to be recycled. By micropore modification of a catalyst, the catalytic cracking catalyst containing double active components macroporous zeolite and mesoporous zeolite has high heavy oil conversion ability and high propylene selectivity for catalytic cracking of a petroleum hydrocarbon raw material and also has high propylene selectivity for methanol catalytic conversion.

A hydrated alumina containing metal elements and the preparation method is provided. The alumina after being roasted contains 50-99 percent by weight of alumina and one species or a plurality of species of metal oxide selected from Cu, Fe, V, Cr, Mn, Zr, Zn, Co, Ti and Mo, wherein firstly, the content of the Cu, Fe, V, Cr, Mn and Zr is 0.5-50 percent; secondly, the content of the Zn, Co, Ti and Mo is 10- 50 percent. The catalyst adopting the hydrated alumina preparation provided by the present invention has higher heavy oil conversion capability and lower gasoline sulfur content.