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 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: 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 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 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 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: A phosphorus-containing or phosphorus-modified ZSM-5 molecular sieve is characterized in that in its 27Al MAS-NMR, the ratio of peak area for the resonance signal having a chemical shift of 39±3 ppm to peak area for the resonance signal having a chemical shift of 54 ppm±3 ppm is ?1; or in its surface XPS elemental analysis, the value of n1/n2 is ?0.1. n1 represents the mole number of phosphorus, n2 represents the total mole number of silicon and aluminum. A cracking auxiliary or cracking catalyst contains the phosphorus-containing/phosphorus-modified ZSM-5 molecular sieve can be made using the phosphorus-containing or phosphorus-modified ZSM-5 molecular sieve.

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 catalytic cracking process includes a step of contacting a cracking feedstock with a catalytic cracking catalyst in the presence of a radical initiator for reaction under catalytic cracking conditions. The radical initiator contains a dendritic polymer and/or a hyperbranched polymer. The dendritic polymer and the hyperbranched polymer each independently has a degree of branching of about 0.3-1, and each independently has a weight average molecular weight of greater than about 1000. The catalytic cracking process is beneficial to enhancing and accelerating the free radical cracking of petroleum hydrocarbon and promoting the regulation of cracking activity and product distribution; by using the process disclosed herein, the conversion of catalytic cracking can be improved, the yields of ethylene and propylene can be increased, and the yield of coke can be reduced.

Abstract: A catalytic cracking process includes a step of contacting a cracking feedstock with a catalytic cracking catalyst in the presence of a radical initiator for reaction under catalytic cracking conditions. The radical initiator contains a dendritic polymer and/or a hyperbranched polymer. The dendritic polymer and the hyperbranched polymer each independently has a degree of branching of about 0.3-1, and each independently has a weight average molecular weight of greater than about 1000. The catalytic cracking process is beneficial to enhancing and accelerating the free radical cracking of petroleum hydrocarbon and promoting the regulation of cracking activity and product distribution; by using the process disclosed herein, the conversion of catalytic cracking can be improved, the yields of ethylene and propylene can be increased, and the yield of coke can be reduced.