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Phosphorus-containing MFI structure molecular sieve and preparation method thereof

ActiveCN107973317APromote generationFacilitated DiffusionMolecular sieve catalystsPentasil aluminosilicate zeoliteMolecular sieveActive component

The invention discloses a phosphorus-containing MFI structure molecular sieve and a preparation method thereof, wherein the n(SiO2) / n(Al2O3) of the molecular sieve is more than 18 and is less than 70,the phosphorus content (calculated as P2O5) of the molecular sieve is 1-15 wt% by using the dry base weight of the molecular sieve as the reference, the volume of the mesopores of the molecular sieveaccounts 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 of the molecular sieve 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, with the catalyst or the auxiliary agent prepared by using the phosphorus-containing MFI structure molecular sieve as the active component, the propylene yield and the propylene selectivity can be effectively increased in the catalytic cracking or catalytic cracking reaction of petroleum hydrocarbons while the yield of BTX can be increased.

Owner:CHINA PETROLEUM & CHEM CORP +1

Preparation method of polymethoxymethylal

ActiveCN103121927AHigh activityIncrease profitOrganic chemistryMolecular sieve catalystsMolecular sieveActive component

The invention relates to a preparation method of polymethoxymethylal, mainly solving the problem that in the prior art, the catalyst has corrosivity. The method comprises the following step: by taking methanol or dimethyl ether and formaldehyde or trioxymethylene as raw materials, contacting the reaction raw materials with a catalyst to generate the polymethoxymethylal under the conditions that the molar ratio of the methanol or the dimethyl ether to the formaldehyde or the trioxymethylene is 1: (0.1-10), the reaction temperature is 50 to 200 DEGC and the reaction pressure of 0.1-10 MPa, wherein a molecular sieve ZSM-5 with the size of less than or equal to 5 microns is adopted as the active component of the used catalyst. through using the technical scheme, the problem is solved well. The method provided by the invention can be applied to industrial production of the poly methoxy methylal.

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Owner:CHINA PETROLEUM & CHEM CORP +1

Preparation method of SBA-16/MOR composite molecular sieve, catalyst and application in double branched chain isomerization

ActiveCN112642474ALow costReduce pollutionMolecular sieve catalystsHydrocarbon oils refiningMolecular sievePtru catalyst

The invention relates to the field of petroleum processing, discloses a preparation method of a novel SBA-16/MOR composite molecular sieve material and application in double branched chain isomerization for the first time, and in particular relates to a low-cost green preparation method of an SBA-16/MOR composite molecular sieve material with suitable acidity and a three-dimensional stepped pore channel structure and a double-branched-chain isomerization catalyst prepared by loading non-noble metal on the SBA-16/MOR composite molecular sieve material. The catalyst is applied to a catalytic cracking (FCC) gasoline hydroisomerization reaction. According to the catalyst, natural minerals are used as raw materials for green synthesis of an MOR molecular sieve nanocrystalline precursor solution without a template agent, and then an SBA-16/MOR composite molecular sieve carrier is prepared through in-situ assembly by adopting a prehydrolysis method under low acidity, so that the production cost is greatly reduced, the equipment damage is relieved, and the pollutant emission is reduced. Therefore, the method provided by the invention has good economic and environmental benefits, and provides technical support for upgrading the quality of oil products in China.

Preparation method of SBA-16/MOR composite molecular sieve, catalyst and application in double branched chain isomerization

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Owner:PETROCHINA CO LTD +1

Method for preparing ethylene through ethanol catalytic dehydration

InactiveCN103030489AIncrease profitIncreased focus capacityMolecular sieve catalystsHydrocarbon from oxygen organic compoundsReaction temperatureSpace velocity

The invention relates to a method for preparing ethylene through ethanol catalytic dehydration and mainly solves the problem of poor reaction stability in the prior part. According the method, ethanol with the weight percentage concentration being 5 to 100 percent is used as raw materials, reaction raw materials and catalysts are in contact to generate ethylene under the conditions that the reaction temperature is 200 to 400 DEG C, and the volume space velocity relative to the ethanol is 0.1 to 15 h<-1>, wherein the used catalysts are MSM-5 zeolite, the MSM-5 zeolite has the crystal grain diameter being smaller than or equal to 5 microns and simultaneously has mesoporouses and micropores, and the mesoporous volume/ micropore volume value of the MSM-5 zeolite is 1.5 to 10. Through the technical scheme, the problems are perfectly solved, and the preparation method can be used in the industrial production of ethylene preparation through ethanol dehydration.

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Owner:CHINA PETROLEUM & CHEM CORP +1

Ex-situ catalytic pyrolysis liquefaction system for biomass

ActiveCN108728143AEasy to operate and controlReduce coke inactivationBiofuelsLiquid hydrocarbon mixture productionCycloneCatalytic pyrolysis

The invention relates to the technical field of conversion and utilization of biomass energy, in particular to an ex-situ catalytic pyrolysis liquefaction system for biomass. The ex-situ catalytic pyrolysis liquefaction system comprises a gasifier, a riser heater, a rotating cone reactor, a flow-guide cyclone reactor, a catalyst regeneration system, a gas-solid separator and a condensation system,wherein the bottom of the gasifier is connected with a first biomass feeder, and the upper part of the gasifier is connected with the lower part of the riser heater; a quartz sand feeder is connectedwith the lower part of the riser heater; the upper part of the riser heater is connected with an inlet of a quartz sand separator; the lower part of the quartz sand separator is connected with a heated sand box which is connected with an inlet of the rotating cone reactor; an outlet of the rotating cone reactor is connected with a gas inlet of the flow-guide cyclone reactor through a gas pipe; the flow-guide cyclone reactor is connected with a catalyst box at the upper part through catalyst inlets. An ex-situ catalytic pyrolysis process is performed on biomass with the system, operation is convenient and controllable, and working condition parameters in a pyrolysis process and a catalytic cracking process can be adjusted and controlled respectively.

Ex-situ catalytic pyrolysis liquefaction system for biomass

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Owner:SHANDONG UNIV OF TECH

Phosphorus-containing and supported-metal-containing MFI molecular sieve and preparation method thereof

ActiveCN107970978AHigh ratio of silicon to aluminumLow total acidCatalytic crackingMolecular sieve catalystsMolecular sieveActive component

The invention discloses a phosphorus-containing and supported-metal-containing MFI molecular sieve and a preparation method thereof, wherein the n(SiO2) / n(Al2O3) of the molecular sieve is greater than100, the phosphorus content of the molecular sieve is 0.1-5 wt%, the supported metal content of the molecular sieve is 0.1-5 wt%, the Al distribution parameter D (Al) of the molecular sieve is more than or equal to 0.6 and is less than or equal to 0.85, the volume of the mesopores of the molecular sieve accounts for 40-80% of the total pore volume, the volume of the mesopores with the pore size of 2-20 nm accounts for more than 90% of the total mesopore volume, the amount of the strong acid of the molecular sieve accounts for 60-80% of the total acid amount, and a ratio of the acid B to the acid L is 15-80. According to the present invention, with the catalyst or the auxiliary agent prepared by using the phosphorus-containing and supported-metal-containing MFI structure molecular sieve asthe active component, the yield of gasoline in the catalytic cracking reaction of petroleum hydrocarbons can be maintained while the octane number of gasoline can be effectively increased, or the octane value of gasoline can be maintained while the yield of gasoline is improved.

Phosphorus-containing and supported-metal-containing MFI molecular sieve and preparation method thereof

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Owner:CHINA PETROLEUM & CHEM CORP +1

Propylene all-silicon molecular sieve based catalyst prepared through methanol conversion and preparation method thereof

InactiveCN106140268AHigh activityPropylene selectivity is highMolecular sieve catalystsHydrocarbon from oxygen organic compoundsExtrusion mouldingIon

A preparation method of a propylene catalyst prepared through methanol conversion comprises the following steps that 1, an all-silicon molecular sieve is treated in alkali liquor, the concentration of the alkali liquor ranges from 0.005 mol / L to 0.5 mol / L, the mass ratio of the molecular sieve to the solution is 1:1 to 1:50, and preferably, the concentration of the alkali liquor ranges from 0.01 mol / L to 0.2 mol / L, and the mass ratio of the molecular sieve to the solution is 1:5 to 1:30; 2, the all-silicon molecular sieve after alkali treatment in the step 1 is directly dried, or filtering and drying are carried out after ion exchange; 3, the all-silicon molecular sieve in the step 2 is dried and calcined and then pressed into particles, and the propylene catalyst prepared through methanol conversion is obtained; or the all-silicon molecular sieve after calcination in the step 2 is mixed and kneaded with an adhesive, then extrusion moulding, drying and calcination are carried out, and the propylene catalyst prepared through methanol conversion is obtained. The prepared catalyst is high in methanol conversion activity, good in propylene selectivity and high in stability.