34results about How to "Good shape selectivity" patented technology

The invention provides a catalytic cracking catalyst and a preparation method thereof, wherein the catalyst comprises 15-65% of natural minerals, 10-60% of an oxide, and 25-75% of a Y type molecular sieve and a phosphorus-containing and supported-metal-containing MFI-structure molecular sieve, wherein the n(SiO2) / n(Al2O3) of the phosphorus-containing and supported-metal-containing MFI-structure molecular sieve is more than 18 and less than 70, the Al distribution parameter D is more than or equal to 0.6 and is less than or equal to 0.85, the volume of the mesopores accounts for 50-80% of the total pore volume, the volume of the mesopores with the pore size of 2-20 nm accounts for more than 85% of the total mesopore volume, the amount of the strong acid accounts for 50-80% of the total acidamount, a ratio of the acid B to the acid L is 7-30, the phosphorus content is 1-15 wt%, and the supported metal content is 0.1-5 wt%. The preparation method comprises: carrying out mixing beating onthe phosphorus-containing and supported-metal-containing MFI-structure molecular sieve, the Y type molecular sieve, the natural minerals and an inorganic oxide binder, and carrying out spray drying.According to the present invention, the catalytic cracking catalyst has the high low-carbon olefin yield in the catalytic cracking of petroleum hydrocarbons.

The invention relates to a catalytic cracking catalyst and a preparation method thereof, wherein the catalyst comprises 15-65% of natural minerals, 10-30% of an oxide, and 25-75% of a Y-type molecularsieve and a phosphorus-containing and supported metal-containing IMF structural molecular sieve, the Al distribution parameter D of the phosphorus-containing and supported metal-containing IMF structural molecular sieve is more than or equal to 0.6 and is less than or equal to 0.85, the volume of mesopores accounts for 50-80% of the total volume of pores, the volume of pores with a pore size of 2-20 nm accounts for more than 85% of the total volume of mesopores, the strong acid accounts for 50-80%, a ratio of an acid B to an acid L is 7-30, the phosphorus content is 0.1-15 wt%, and the supported metal content is 0.1-5 wt%. The preparation method comprises: carrying out mixing beating on the phosphorus-containing and supported metal-containing IMF structural molecular sieve, the Y-type molecular sieve, the natural minerals and an inorganic oxide binder, and carrying out spray drying. According to the present invention, with the application of the catalytic cracking catalyst in catalytic cracking of petroleum hydrocarbons, the yield of low-carbon olefins is high.

The invention provides a catalytic cracking catalyst and a preparation method thereof, wherein the catalyst comprises 15-65% of natural minerals, 10-60% of an oxide, and 25-75% of a Y type molecular sieve and a phosphorus-containing IMF-structure molecular sieve, wherein the n(SiO2) / n(Al2O3) of the phosphorus-containing IMF-structure molecular sieve is more than 18 and less than 70, the phosphoruscontent is 1-15 wt%, the Al distribution parameter D is more than or equal to 0.6 and is less than or equal to 0.85, the volume of the mesopores accounts for 40-70% of the total pore volume, the volume of the mesopores with the pore size of 2-20 nm accounts for more than 85% of the total mesopore volume, the amount of the strong acid accounts for 45-75% of the total acid amount, and a ratio of the acid B to the acid L is 8-30. According to the present invention, the catalytic cracking catalyst has high low-carbon olefin yield and high BTX yield in the catalytic cracking of petroleum hydrocarbons.

The invention discloses an RTH type topological structure molecular sieve based catalyst for dimethyl ether carbonylation reaction and a preparation method thereof. An organic template (OSDA) and NaOH solution form mixed solution, a silicon source is added to perform uniform mixing, aluminosilicate zeolites which are of an FAU structure is added to provide a the silicon source and an aluminum source and mixed sol is formed by stirring, recycling is performed after dynamic crystallization for 3-30 d at 140-180 DEG C, and a two-dimensional octatomic ring duct RTH type molecular sieve topological structure through ammonium exchange, drying and roasting activation, to serve as a dimethyl ether carbonylation reaction catalyst. The molecular sieve catalyst has a unique size duct structure and a catalyzing shape selection effect, so that the dimethyl ether carbonylation to generate methyl acetate has very high conversion rate and selectivity, and the service life of the catalyst is greatly prolonged.

The invention relates to a preparation method of 4-hexene-3-ketone by virtue of dehydration of 4-hydroxy-3-hexanone, and the method is mainly used for solving the problems in the prior art that the catalyst activity is low, the reaction temperature is high and the space velocity is low. The technical scheme adopted by the invention is as follows: according to the preparation method, 4-hydroxy-3-hexanone which is used as a raw material, is contacted with a catalyst so as to generate 4-hexene-3-ketone under the condition that the reaction temperature is 200-400 DEG C, and the space velocity relative to the liquid weight of 4-hexene-3-ketone is 0.5-15h<-1>, wherein the catalyst comprises the following components in parts by weight: a), 40-95 parts of ZSM-11 molecular sieve with the silicon aluminum mole ratio (SiO2 / Al2O3) of 20-300 and the crystal particle diameter of equal to or less than 5 microns and b), 5-6 parts of binding agent, and the ZSM-11 molecular sieve is at least subjected to once acid pickling, so that the problems in the prior art are better solved, and the method can be used in the industrial production of 4-hexene-3-ketone prepared by utilizing 4-hydroxy-3-hexanone.

The invention relates to a preparation method of polyoxy methylene dimethyl ether, which mainly solves the problem of corrosiveness of the catalyst in the prior art. The method comprises the following step: contacting raw materials methanol or dimethyl ether and formaldehyde or trioxymethylene in a mol ratio of 1:(0.1-10) with a catalyst to react at the reaction temperature of 50-200 DEG C under the reaction pressure of 0.1-10 MPa to generate the polyoxy methylene dimethyl ether. The catalyst comprises the following components in parts by weight: a) 40-95 parts of ZSM-11 molecular sieve of which the silicon / aluminum (SiO2 / Al2O3) mol ratio is 20-300 and the crystal grain diameter is at most 5 micrometers, and b) 5-60 parts of adhesive. The ZSM-11 molecular sieve is subjected to acid washing at least once. The technical scheme provided by the invention well solves the problem, and can be used for industrial production of the polyoxy methylene dimethyl ether.

The present invention relates to a kind of MFI structure molecular sieve rich in mesoporous phosphorus and rare earth and preparation method thereof, the n(SiO 2 ) / n(Al 2 o 3 ) is greater than 15 and less than 70; with P 2 o 5 Calculated and based on the dry weight of the molecular sieve, the phosphorus content of the molecular sieve is 1-15% by weight; based on the oxide of the loaded metal and based on the dry weight of the molecular sieve, the content of the loaded metal M1 in the molecular sieve is 1-10% by weight, and the content of the loaded metal M2 is 0.1-5% by weight, wherein the loaded metal M1 is selected from one or both of lanthanum and cerium, and the loaded metal M2 is selected from iron, cobalt, nickel, copper, manganese, One of zinc, tin, bismuth and gallium; the proportion of the mesopore volume of the molecular sieve to the total pore volume is 40-70% by volume. The molecular sieve with MFI structure provided by the invention has better ethylene selectivity in the petroleum hydrocarbon catalytic cracking reaction, and can produce more propylene and BTX at the same time.

The invention discloses a toluene and methanol alkylation catalyst and a preparation method and application thereof. A catalyst carrier contains a hydrogen-type ZSM-48 molecular sieve and a modified element which comprises one or several of lanthanum, magnesium, phosphorus and silicon, the content (in percentage by weight ) of the hydrogen-type ZSM-48 molecular sieve in the carrier is 10wt%-90wt%, and preferably 20wt%-80wt%; the modified element contains one or several of lanthanum, magnesium, phosphorus and silicon and is calculated according to oxides, and the modified element accounts for 0.05%-60% of the weight of the carrier, and preferably 0.5%-40%. The catalyst is used for an alkylation reaction of toluene and methanol, and has the characteristics that the conversion rate of the toluene is high, the selectivity of paraxylene is high, and the like.