Abstract: A hierarchical porous all-silica molecular sieve is provided. The 31P MAS NMR spectrum of the molecular sieve shows three characteristic peaks at chemical shifts of ?5±1 ppm, ?34±1 ppm and ?61±1 ppm, wherein the peak intensity of the characteristic peak at the chemical shift of ?5±1 ppm is recorded as N1, the peak intensity of the characteristic peak at the chemical shift of ?34±1 ppm is recorded as N2, and the peak intensity of the characteristic peak at the chemical shift of ?61±1 ppm is recorded as N3, then X1 as defined by formula (1) is in the range of 0.10-0.30; X1=N1/N3 (1); and X2 as defined by formula (2) is in the range of 0.15-0.45; X2=N2/N3 (2). When the molecular sieve is used in the gas-phase Beckmann rearrangement reaction of cyclohexanone oxime, the selectivity of the caprolactam product and the catalyst life can be improved.

Abstract: A titanium silicalite molecular sieve with a hierarchical porous structure is provided. The spectral peaks of the 1H MAS NMR spectrum of the titanium silicalite molecular sieve in the chemical shift range of 1-6 ppm are separated to obtain five spectral peaks whose chemical shifts corresponding to the peak positions are 1.8±0.1 ppm, 2.2 ppm±0.1 ppm, 2.8 ppm±0.1 ppm, 3.8±0.1 ppm and 4.6±0.1 ppm, respectively. The peak areas of the peaks satisfy specific proportional relationships. The molecular sieve has significantly enhanced anti-deactivation performance and can significantly improve the cyclohexanone oxime conversion rate and the caprolactam selectivity when used in the cyclohexanone oxime gas-phase Beckmann rearrangement reaction.

Abstract: A rare earth-containing Y zeolite has at least two mesopore pore-size distributions at 2-3 nanometers and 3-4 nanometers. A catalytic cracking catalyst contains the rare earth-containing Y zeolite. When used in the catalytic cracking of heavy oil, the catalytic cracking catalyst invention has excellent heavy oil conversion ability, higher gasoline yield, and lower coke selectivity.

Abstract: A rare earth-containing Y zeolite has at least two mesopore pore-size distributions at 2-3 nanometers and 3-4 nanometers. A catalytic cracking catalyst contains the rare earth-containing Y zeolite. When used in the catalytic cracking of heavy oil, the catalytic cracking catalyst provided has excellent heavy oil conversion ability, higher gasoline yield, and lower coke selectivity.

Abstract: A fluidized catalytic conversion method for producing light olefins includes the following steps: 1) introducing an olefin-rich feedstock into a fluidized catalytic conversion reactor, and contacting with a catalyst having a temperature of 650° C. or higher for reaction; 2) separating the reaction product vapor obtained by the reaction to obtain a stream comprising C5+ olefins; and 3) recycling at least a part of the stream comprising C5+ olefins to step 1) for further reaction. The fluidized catalytic conversion method can effectively improve the yield of light olefins, improve the selectivity and improve the ethylene/propylene ratio of the product.

Abstract: A catalytic cracking agent has an active component consisting of a phosphorus-modified molecular sieve and a non-phosphorus-modified molecular sieve or only consisting of a phosphorus-modified molecular sieve. According to an electron probe microanalysis (EPMA), the D value of phosphorus in the catalytic cracking agent is ?65%, preferably ?68%, provided that the active component consists of the phosphorus-modified molecular sieve and the non-phosphorus-modified molecular sieve, or the D value of phosphorus in the catalytic cracking agent is ?82%, preferably ?84%, provided that the active component only consists of the phosphorus-modified molecular sieve.

Abstract: This application discloses a fingerprint enrollment method and a related apparatus. When an electronic device enables a fingerprint enrollment mode, and detects an input (a touch operation or a friction sliding operation) of a user for a fingerprint collection region, the electronic device may collect fingerprint information of the user, and determine an enrolled region based on the collected fingerprint information. If an area of the enrolled region is less than a preset value, the electronic device outputs an enrollment prompt, where the enrollment prompt is used to prompt the user of fingerprint information to be input in a next step. If the area of the enrolled region is greater than the preset value, the electronic device outputs a completion prompt, where the completion prompt is used to prompt the user that fingerprint enrollment is completed. In this way, fingerprint enrollment efficiency can be improved.

Abstract: A phosphorus-modified MFI-structured molecular sieve is characterized in that the molecular sieve has a K value, satisfying: 70%?K?90%; for example, 75%?K?90%; further for example, 78%?K?85%. The K value is as defined in the specification. A cracking auxiliary or cracking catalyst contains the phosphorus-modified MFI molecular sieve.

Abstract: A fluidized catalytic conversion method for maximizing the production of propylene includes the steps of: 1) contacting a heavy feedstock oil with a catalytic conversion catalyst having a temperature of 650° C. or higher for reaction; 2) contacting a hydrocarbon oil feedstock having an olefin content of 50 wt % or more with the catalytic conversion catalyst after the reaction of step 1); 3) separating a first catalytic cracking distillate oil and a second catalytic cracking distillate oil from the resulting reaction products; 4) separating an olefin-rich stream from the first catalytic cracking distillate oil; and 5) recycling the olefin-rich stream. The method can effectively improve the yield of propylene and realize an effective utilization of petroleum resources.

Abstract: A process for producing high-purity ?-caprolactam includes the following steps: (1) cyclohexanone oxime is subjected to a gas phase Beckmann rearrangement reaction; (2) the reaction product obtained from step (1) is successively subjected to gas-liquid separation, solvent removal, and light impurity removal to produce a crude caprolactam; (3) the crude caprolactam is subjected to crystallization to produce a crystallization product and a crystallization mother liquor; (4) the crystallization mother liquor is subjected to crystallization to produce a crystal slurry. At least a part of the crystal slurry is returned to step (2) and/or step (3). The purification process can obtain high-purity caprolactam through only one crystallization and one mother liquor crystallization without reducing the overall yield of caprolactam.

Abstract: A continuous process for preparing exo-THDCPD by isomerization of endo-THDCPD includes the step of passing endo-THDCPD and hydrogen gas successively through a first reaction zone filled with a hydrogenation protectant and a second reaction zone filled with an isomerization catalyst to perform a hydroisomerization reaction so as to obtain exo-THDCPD, wherein the hydrogenation protectant is a supported metal hydrogenation catalyst, and the isomerization catalyst is a metal-modified molecular sieve catalyst. The process converts endo-THDCPD to exo-THDCPD, with a conversion of greater than 86% and a target product selectivity of greater than 94%.

Abstract: A molecular sieve of MFI structure has a ratio of n(SiO2)/n(Al2O3) of more than 15 and less than 70. It has a content of phosphorus of 1-15 wt %, calculated as P2O5 and based on the dry weight of the molecular sieve and a content of the supported metal in the molecular sieve 1-10 wt % based on the oxide of the supported metal and the dry weight of the molecular sieve. The supported metal is one or two selected from lanthanum and cerium. The volume of mesopores in the molecular sieve represents 40-70% by volume of the total pore volume of the molecular sieve by volume, measured by a nitrogen adsorption BET specific surface area method, and the volume of mesopores means the pore volume of the pores having a diameter of more than 2 nm and less than 100 nm.

Abstract: A rare earth- and phosphorus-containing molecular sieve of MFI structure rich in mesopores has a ratio of n(SiO2)/n(Al2O3) of more than 15 and less than 70. The molecular sieve has a content of phosphorus of 1-15 wt %, calculated as P2O5 and based on the dry weight of the molecular sieve. The content of the supported metal in the molecular sieve is 1-10 wt % supported metal M1 and 0.1-5 wt % supported metal M2 based on the oxide of the supported metal and the dry weight of the molecular sieve. The supported metal M1 is one or two selected from lanthanum and cerium, and the supported metal M2 is one selected from iron, cobalt, nickel, copper, manganese, zinc, tin, bismuth and gallium; the volume of mesopores in the molecular sieve represents 40-70% by volume of the total pore volume of the molecular sieve by volume.

Abstract: A process for preparing a catalytic cracking catalyst includes steps of mixing raw materials including a rare earth-containing NaY molecular sieve obtained by contacting a NaY molecular sieve with a rare-earth salt solution or a mixed solution of rare-earth salt solution and ammonium salt solution, filtering, and water-washing, an inorganic oxide binder and a natural mineral, slurrying and shaping into shaped bodies; hydrothermally calcining shaped bodies in an atmosphere condition where a pressure is externally applied and an aqueous solution containing an acidic substance or an alkaline substance is externally added; and then ammonium-exchanging to remove the alkali metal. The present invention optimizes and shortens the preparation process of the catalyst, which can reduce the preparation cost, and the prepared catalyst has excellent heavy oil conversion ability, higher gasoline and diesel yield, lower coke selectivity, and relatively reduces the used amount of the molecular sieve in the catalyst.

Abstract: A fluidized catalytic conversion method for maximizing the production of propylene includes the steps of: 1) contacting a heavy feedstock oil with a catalytic conversion catalyst having a temperature of 650° C. or higher for reaction; 2) contacting a hydrocarbon oil feedstock having an olefin content of 50 wt % or more with the catalytic conversion catalyst after the reaction of step 1); 3) separating a first catalytic cracking distillate oil and a second catalytic cracking distillate oil from the resulting reaction products; 4) separating an olefin-rich stream from the first catalytic cracking distillate oil; and 5) recycling the olefin-rich stream. The method can effectively improve the yield of propylene and realize an effective utilization of petroleum resources.

Abstract: A fluidized catalytic conversion method for producing light olefins includes the following steps: 1) introducing an olefin-rich feedstock into a fluidized catalytic conversion reactor, and contacting with a catalyst having a temperature of 650° C. or higher for reaction; 2) separating the reaction product vapor obtained by the reaction to obtain a stream comprising C5+ olefins; and 3) recycling at least a part of the stream comprising C5+ olefins to step 1) for further reaction. The fluidized catalytic conversion method can effectively improve the yield of light olefins, improve the selectivity and improve the ethylene/propylene ratio of the product.

Abstract: A catalytic cracking agent has an active component consisting of a phosphorus-modified molecular sieve and a non-phosphorus-modified molecular sieve or only consisting of a phosphorus-modified molecular sieve. According to an electron probe microanalysis (EPMA), the D value of phosphorus in the catalytic cracking agent is ?65%, preferably ?68%, provided that the active component consists of the phosphorus-modified molecular sieve and the non-phosphorus-modified molecular sieve, or the D value of phosphorus in the catalytic cracking agent is ?82%, preferably ?84%, provided that the active component only consists of the phosphorus-modified molecular sieve.

Abstract: An alkylation reaction apparatus has n reactors. In the n reactors, there are m reactors including the first reactor that have three reaction zones as defined below. According to the flow direction order of alkylation reaction streams, the three reaction zones are an x reaction zone, a y reaction zone and a z reaction zone respectively; based on the mixing intensity, the mixing intensity of the y reaction zone>the mixing intensity of the x reaction zone>the mixing intensity of the z reaction zone, wherein n?1 and n?m. An alkylation reaction system includes the aforementioned alkylation reaction apparatus, and a liquid acid catalyzed alkylation reaction process by using the aforementioned alkylation reaction apparatus or the aforementioned alkylation reaction system.

Abstract: A catalytic conversion process for producing gasoline and propylene includes the steps of 1) subjecting a feedstock oil to a first catalytic conversion reaction in a first catalytic conversion reaction device to obtain a first reaction product; 2) separating the first reaction product to obtain a propylene fraction, a gasoline fraction and a fraction comprising C4 olefin; 3) carrying out an oligomerization reaction on the fraction comprising C4 olefin in an oligomerization reactor to obtain an oligomerization product comprising C12 olefin, and optionally separating the oligomerization product to obtain a fraction comprising C12 olefin; 4) recycling the C12 olefin-containing oligomerization product or fraction to the first catalytic conversion reaction device, and/or sending the C12 olefin-containing oligomerization product or fraction to a second catalytic conversion reaction device for a second catalytic conversion reaction to obtain a second reaction product comprising propylene.