WO2014000423A1 - 一种包含改性y型分子筛的催化裂化催化剂及其制备方法 - Google Patents
一种包含改性y型分子筛的催化裂化催化剂及其制备方法 Download PDFInfo
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/80—Mixtures of different zeolites
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/08—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the faujasite type, e.g. type X or Y
- B01J29/085—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the faujasite type, e.g. type X or Y containing rare earth elements, titanium, zirconium, hafnium, zinc, cadmium, mercury, gallium, indium, thallium, tin or lead
- B01J29/088—Y-type faujasite
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/0009—Use of binding agents; Moulding; Pressing; Powdering; Granulating; Addition of materials ameliorating the mechanical properties of the product catalyst
- B01J37/0018—Addition of a binding agent or of material, later completely removed among others as result of heat treatment, leaching or washing,(e.g. forming of pores; protective layer, desintegrating by heat)
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B39/00—Compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites; Their preparation; After-treatment, e.g. ion-exchange or dealumination
- C01B39/02—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof; Direct preparation thereof; Preparation thereof starting from a reaction mixture containing a crystalline zeolite of another type, or from preformed reactants; After-treatment thereof
- C01B39/026—After-treatment
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G11/00—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
- C10G11/02—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils characterised by the catalyst used
- C10G11/04—Oxides
- C10G11/05—Crystalline alumino-silicates, e.g. molecular sieves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2229/00—Aspects of molecular sieve catalysts not covered by B01J29/00
- B01J2229/10—After treatment, characterised by the effect to be obtained
- B01J2229/16—After treatment, characterised by the effect to be obtained to increase the Si/Al ratio; Dealumination
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2229/00—Aspects of molecular sieve catalysts not covered by B01J29/00
- B01J2229/10—After treatment, characterised by the effect to be obtained
- B01J2229/18—After treatment, characterised by the effect to be obtained to introduce other elements into or onto the molecular sieve itself
- B01J2229/186—After treatment, characterised by the effect to be obtained to introduce other elements into or onto the molecular sieve itself not in framework positions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2229/00—Aspects of molecular sieve catalysts not covered by B01J29/00
- B01J2229/30—After treatment, characterised by the means used
- B01J2229/36—Steaming
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2229/00—Aspects of molecular sieve catalysts not covered by B01J29/00
- B01J2229/30—After treatment, characterised by the means used
- B01J2229/37—Acid treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2229/00—Aspects of molecular sieve catalysts not covered by B01J29/00
- B01J2229/30—After treatment, characterised by the means used
- B01J2229/42—Addition of matrix or binder particles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/28—Phosphorising
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/30—Ion-exchange
Definitions
- Catalytic cracking catalyst comprising modified Y type molecular sieve and preparation method thereof
- the present invention relates to a catalytic cracking catalyst comprising a modified cerium type molecular sieve and a process for the preparation thereof.
- Coke is composed of various hydrogen-depleted compounds with different degrees of hydrogen deficiency and is a product of hydrogen transfer reaction. Therefore, to reduce the coke yield, it is necessary to appropriately reduce the hydrogen transfer reaction.
- the main process of the hydrogen transfer reaction is the adsorption, reaction and desorption of protonated olefins in the acidic center of the molecular sieve.
- the density of the molecular sieve acid center is high and the hydrogen transfer reaction is increased.
- the acid density of molecular sieves is related to the ratio of silica to aluminum in their framework.
- the molecular sieve with low silica-aluminum ratio is more than the center of aluminum-oxygen tetrahedral acid.
- the molecular density of the molecular sieve is high, the hydrogen transfer reaction is high, the speed is fast, and the coke yield is high.
- the molecular sieve with high framework silica-alumina ratio has low acid center density.
- the hydrogen transfer reaction is relatively small and the coke yield is lowered.
- the catalyst has an age distribution. Catalysts of different ages have different reaction properties.
- the molecular sieve In the fresh catalyst, the molecular sieve has larger cell unit, high cracking activity, strong hydrogen transfer ability and high coke yield.
- the long-running catalyst under the hydrothermal condition has the framework dealuminization of the molecular sieve, the structure collapses, and the catalyst cracking activity decreases. Sexual deterioration. Obviously, the catalysts in these two states are not conducive to the improvement of heavy oil utilization.
- molecular sieves with low unit cell size are used to reduce the coke selectivity of fresh molecular sieves.
- Improve the stability of molecular sieve activity Qualitative, in order to improve the balance activity, to minimize the difference in activity of molecular sieve hydrothermal aging at different stages, in order to reduce the coke selectivity of the catalyst as a whole, thereby improving the utilization of heavy oil.
- Patent documents such as CN1157465C, CN 1436727A, CN 1506161A, CN 1317547A, CN 101537366A, EP 0421422 and CN 1951814A report the improvement of the silica-alumina ratio of Y-type molecular sieves by hydrothermal aluminizing and/or chemical dealumination.
- U.S. Patent No. 5,013, 699 discloses a method of treating Y zeolite by subjecting NaY zeolite to ammonium ion exchange and then subjecting it to high temperature steam treatment. The sample is then subjected to ammonium exchange at pH ⁇ 4 and aluminum is removed to obtain a zeolite product.
- the treatment method uses a sample of zeolite treated at a low pH, without the use of protective measures, which tends to cause destruction of the zeolite framework and lower the crystallinity of the zeolite.
- U.S. Patent No. 4,503,023 discloses an LZ-210 zeolite and a preparation method thereof.
- the NaY zeolite is dealuminized with fluorosilicate to increase the silica-alumina ratio of the zeolite, and the obtained product has higher crystallinity, but fluorosilicic acid is used.
- the SiO2/A1203 molar ratio of the zeolite product is usually not higher than 13, otherwise the crystallinity of the zeolite product will be greatly reduced.
- the modified Y zeolite prepared by the method of dealuminating silicon supplementation with fluorosilicate is extremely rare, and is disadvantageous for use as a heavy oil catalytic cracking reaction.
- CN1 157465C provides a catalytic cracking catalyst comprising 50 to 95% by weight of a catalyst and 5 to 50% of an alkaline earth metal-containing molecular sieve.
- the catalyst is obtained by uniformly mixing an alkaline earth metal-containing compound with a molecular sieve in the presence of water, adding or not adding ammonia water, drying and calcining to obtain an alkaline earth metal-containing molecular sieve, and then dispersing the molecular sieve in a carrier slurry and drying.
- Another object of the present invention is to provide a process for the preparation of such a modified Y-type molecular sieve.
- Still another object of the invention is the use of such modified Y-type molecular sieves in catalytic cracking of heavy feedstocks.
- the object of the present invention is to provide a high stability, low coke yield, high heavy oil
- the present invention provides a modified Y type molecular sieve characterized in that the unit cell constant is
- the content of P is 0.05-6% by weight percentage of the modified Y-type molecular sieve
- the content of RE 2 0 3 is 0.03-10%, the content of alumina is less than 22%; the concentration of hydroxyl group is less than 0.35 mmol/g and more than 0.05 mmol/g, said
- M 2() (y C , M Qin.c denotes the weight loss percentage of the sample measured at temperatures of 200 ° C, 500 ° C and 800 ° C, respectively, and C is the crystallinity of the sample. The percent weight loss and sample crystallinity were measured by the methods described herein.
- the present invention also provides a catalytic cracking catalyst comprising a cracking active component, 10% by weight to 70% by weight of clay based on dry basis and 10% by weight to 40% by weight of inorganic oxide binder based on oxide Relative to the weight of the catalytic cracking catalyst, wherein the cracking active component comprises: 10% by weight to 50% by weight, based on the weight of the catalytic cracking catalyst, of a modified Y molecular sieve on a dry basis and 0-based on a dry basis 40% by weight of other molecular sieves.
- the invention provides a method of making a catalytic cracking catalyst comprising mixing and spray drying said modified Y-type molecular sieves, other molecular sieves, clays, and inorganic oxide binders.
- the invention also provides a preparation method of the above modified Y type molecular sieve, wherein the modified Y type molecular sieve is obtained by using a NaY molecular sieve as a raw material and a preparation process of "three cross three baking". That is, a combined modification process using three exchanges and three hydrothermal treatments.
- the introduction of rare earth and phosphorus is carried out by means of exchange.
- the molecular sieve is exchanged by adding a phosphorus-containing exchange solution or a rare earth-containing exchange solution.
- Phosphorus can be added in any exchange process and can be added in one or more times.
- the rare earth can be added in any exchange process other than one exchange.
- a dealumination agent may also be added for chemical dealumination to promote the removal of aluminum.
- the chemical dealumination process can be carried out in any exchange process other than one.
- the modified Y-type molecular sieve provided by the invention can be filled with silicon as much as possible by aluminum vacancy after dealuminization, has few lattice defects, is excellent in stability, and has good structural hydrothermal stability and active hydrothermal stability.
- the molecular sieve is used as an active component in a catalytic cracking catalyst, which can maintain long-term stable activity, effectively control coke yield, and improve heavy oil utilization.
- the present invention provides the following solutions:
- a catalytic cracking catalyst comprising a cracking active component, 10% by weight to 70% by weight of clay based on dry basis and 10% by weight to 40% by weight of inorganic oxide binder based on oxide, relative to The weight of the catalytic cracking catalyst, wherein the cracking active component comprises: relative to catalytic cracking
- the weight of the chemical agent 10% by weight to 50% by weight of the modified Y-type molecular sieve on a dry basis and 0-40% by weight of other molecular sieves on a dry basis, wherein the modified Y-type molecular sieve is characterized by a crystal
- the cell constant is 2.420-2.440 nm; the content of P is 0.05-6%, the content of RE 2 0 3 is 0.03-10%, and the content of alumina is less than 22% by weight percentage of modified Y type molecular sieve;
- the clay is selected from the group consisting of kaolin, halloysite, montmorillonite, diatomaceous earth, halloysite, saponite, rectorite, sepiolite, One or more of attapulgite, hydrotalcite and bentonite; wherein the inorganic oxide binder is an alumina binder, including ⁇ -alumina, ⁇ -alumina, ⁇ -alumina, ⁇ - Alumina, pseudo-boehmite
- Y type molecular sieve such as one or more of REY, REHY DASY, USY, REUSY molecular sieve;
- a molecular sieve having an MFI structure such as one or more of ZSM-5, ZRP, ZSP molecular sieves; Beta zeolite;
- Non-zeolitic molecular sieves such as SAPO, titanium silicalite.
- catalytic cracking catalyst according to any one of the preceding claims, wherein the catalytic cracking catalyst comprises: relative to the weight of the catalytic cracking catalyst:
- the cracking active component comprises or consists essentially of or consists of:
- Y type molecular sieve selected from one or more of REY, REHY, DASY, USY and REUSY in an amount of not more than 30% by weight on a dry basis
- modified cerium type molecular sieve is prepared by the following method, using NaY molecular sieve as a raw material, and using a rare earth-containing substance and a phosphorus-containing substance to be exchanged three times. Process and three hydrothermal treatments,
- the molecular sieve is independently added to the phosphorus-containing exchange solution or the rare earth-containing exchange solution in each exchange;
- the rare earth is added in any exchange process other than one.
- the phosphorus-containing substance is selected from the group consisting of orthophosphoric acid, phosphorous acid, pyrophosphoric acid, ammonium phosphate, diammonium hydrogen phosphate, ammonium dihydrogen phosphate, and aluminum phosphate. A variety.
- the rare earth-containing material is selected from the group consisting of cerium oxide, cerium oxide, cerium nitrate, cerium nitrate, cerium chloride, cerium chloride, mixed rare earth nitrate and chlorinated mixed rare earth. One or more.
- the dealumination agent is selected from the group consisting of ethylene One or more of amine tetraacetic acid, oxalic acid, citric acid, sulfosalicylic acid, fluorosilicic acid, hydrochloric acid, sulfuric acid, nitric acid, ammonium oxalate, ammonium fluoride, ammonium fluorosilicate, ammonium fluoroborate.
- Each hydrothermal treatment is carried out independently at a temperature of 350-650 ° C, for example 550-600 ° C, for at least 0.5 hours, for example 1-2 hours, at 1-100%, for example 70%-100% steam atmosphere. .
- NaY zeolite mixed with ammonium salt, ammonium phosphate and water according to NaY molecular sieve: hinge salt: ammonium phosphate: water 1: [0.4-1]: [0-0.04]: [5-10] , using a mineral acid slurry with a pH of 3.0-4.5, and then washing at 70-95 ° C for at least 0.5 hours, wherein the NaY molecular sieve is based on the dry basis, and the ammonium phosphate is based on the elemental phosphorus;
- step 2) The product obtained in the step 1) is calcined at a temperature of 350-650 ° C, 1-100% water vapor atmosphere for at least 0.5 h to obtain a baked molecular sieve;
- step 4) The product obtained in the step 3) is calcined at a temperature of 350-65 (TC, 1-100% water vapor atmosphere for at least 0.5 hours to obtain a second-baked molecular sieve;
- step 6) The product obtained in the step 5) is calcined at 350-650 ° C in a 1-100% steam atmosphere for at least 0.5 hours to obtain a modified Y-type molecular sieve.
- a method of preparing a catalytic cracking catalyst comprising: preparing a slurry comprising a cracking active component, a clay, and a binder, wherein each 100 parts by weight of the catalytic cracking catalyst is used in an amount of from 10 to 70 parts by weight on a dry basis.
- the cracking active component comprises a modified Y-type molecular sieve and other molecular sieves, wherein the modified Y-type molecular sieve is characterized in that the unit cell constant is 2.420-2.440 nm ; and based on the weight percentage of the modified Y-type molecular sieve,
- the clay is selected from the group consisting of kaolin, halloysite, montmorillonite, diatomaceous earth, halloysite, saponite, and stalk One or more of earth, sepiolite, attapulgite, hydrotalcite and bentonite; wherein the inorganic oxide binder is an alumina binder, including ⁇ -alumina, ⁇ -alumina, lanthanum - one or more of alumina, cerium-alumina, Pseudoboemite, Boehmite, Gibbsite or Bayerite.
- Y-type molecular sieves such as one or more of REY, REHY, DASY, USY, REUSY molecular sieves;
- a molecular sieve having an MFI structure such as one or more of ZSM-5, ZRP, ZSP molecular sieves; Beta zeolite;
- Non-zeolitic molecular sieves such as SAPO, titanium silicalite.
- the cracking active component comprises or consists essentially of or consists of:
- Y-type molecular sieve selected from one or more of REY, REHY, DASY, USY and REUSY, on a dry basis
- the catalytic cracking catalyst of the present invention can exhibit good stability in the catalytic cracking process, can reduce the coke formation rate, and improve the utilization rate of heavy oil.
- the catalytic cracking catalyst of the present invention can also exhibit good diesel yield, gasoline yield, low carbon olefin (e.g., propylene) yield, or total diesel and gasoline yield during catalytic cracking.
- Figure 1 is a graph comparing crystallinity data of Examples and Comparative Examples.
- Figure 2 is a graph comparing the crystal retention data of the examples and comparative columns.
- Figure 3 is a comparison of activity data of the examples and comparative examples.
- Figure 4 is a comparison of coke selectivity data for the examples and comparative examples. detailed description
- Coke is composed of various hydrogen-depleted compounds with different degrees of hydrogen deficiency, and is a product of a hydrogen transfer reaction. Therefore, in order to reduce the coke yield, it is necessary to reduce the hydrogen transfer reaction.
- the main process of the hydrogen transfer reaction is the adsorption, reaction and desorption of protonated olefins in the acidic center of the molecular sieve.
- Molecular sieve acid center density hydrogen transfer The reaction increases.
- the acid density of molecular sieves is related to the ratio of silica to aluminum in their framework.
- the molecular sieve with low silica-aluminum ratio is more than the center of aluminum-oxygen tetrahedral acid.
- the molecular density of the molecular sieve is high, the hydrogen transfer reaction is high, the speed is fast, and the coke yield is high.
- the molecular sieve with high framework silica-alumina ratio has low acid center density.
- the hydrogen transfer reaction is relatively small and the coke yield is lowered. It can be seen that to ensure that the active component has good coke selectivity, the active component must have a low unit cell constant and an appropriate acid density.
- the modified Y type molecular sieve provided by the invention has a unit cell constant of 2.420-2.440 nm, preferably a unit cell constant of 2.428-2.438 nm, and a content of P of 0.05-6% by weight, preferably
- RE 2 0 3 content is 0.03-10%, preferably 0.1-4.5%, and the content of alumina is less than
- M 2()( y C , M ⁇ ⁇ ⁇ c c c denotes the percentage of weight loss measured at 200 ° (:, 500 ° C and 800 ° C, respectively, and C is the crystallinity of the sample.
- the zeolite molecular sieve skeleton is dealuminated, and a "hydroxyl socket" composed of four adjacent Si-OHs is formed in the aluminum vacancy, which is a defect in the lattice of the zeolite molecular sieve, and the number thereof is directly related to the structural stability of the zeolite.
- the aluminum vacancies formed in the hydrothermal or chemical dealuminization process of Y-type molecular sieves are filled by free silicon.
- the specific hydroxyl group concentration is characterized by the method provided by the literature (Liu Xingyun, Liu Hui, Li Xuanwen et al., Journal of Physical Chemistry. 1998, 14(12): 1094-1097).
- the characterization method is to calculate the sample by thermogravimetric analysis.
- the number of moles of hydroxyl groups is calculated from the weight loss curve of 500 ° C - 800 ° C, and then converted into the mass of NH 3 , and then The number of moles of the hydroxy socket can be calculated by subtracting the amount of NH 3 from the weight loss calculated from the 200 ° C - 500 ° C weight loss curve.
- the invention also provides a preparation method of the above modified Y type molecular sieve, which is a NaY molecular sieve
- the raw material is obtained through the preparation process of "three cross three baking".
- the so-called "three cross three baking” is an abbreviation for a molecular sieve modification process in the field, that is, a combined modification process using three exchanges and three hydrothermal treatments.
- the introduction of rare earth and phosphorus is carried out by means of exchange.
- the molecular sieve is exchanged by adding a phosphorus-containing exchange solution or a rare earth-containing exchange solution.
- Phosphorus can be added in any exchange process and can be added in one or more portions.
- the rare earth may be added in any exchange process other than one exchange.
- a dealumination agent may also be added for chemical dealumination to promote the removal of aluminum.
- the chemical dealumination process can be carried out in any exchange process other than one.
- the phosphorus-containing exchange solution contains a phosphorus-containing material.
- the rare earth-containing exchange solution contains a rare earth-containing material.
- the phosphorus-containing exchange solution does not contain a rare earth-containing material.
- the rare earth-containing exchange solution does not contain a phosphorus-containing material.
- the phosphorus-containing substance means one or more of orthophosphoric acid, phosphorous acid, pyrophosphoric acid, ammonium phosphate, diammonium hydrogen phosphate, ammonium dihydrogen phosphate, and aluminum phosphate.
- the hinge salt means one or more of ammonium chloride, ammonium nitrate, ammonium carbonate, ammonium hydrogencarbonate, ammonium oxalate, ammonium sulfate, and ammonium hydrogen sulfate.
- the ammonium phosphate salt means one or more of ammonium phosphate, diammonium phosphate, and ammonium dihydrogen phosphate.
- the rare earth-containing substance means one or more of cerium oxide, cerium oxide, cerium nitrate, cerium nitrate, cerium chloride, cerium chloride, mixed rare earth nitrate, and chlorinated mixed rare earth.
- the mixed rare earth nitrate means (RExiRE ⁇ -RE ⁇ XNO ⁇ , wherein RE xl , RE ⁇ ..., RExn means a rare earth element, wherein n is an integer greater than or equal to 2, and the sum of xl+x2+...+ Xn Equal to 1.
- Chlorinated mixed rare earth also known as rare earth chloride
- RE yl RE y2 ... RE yn Chlorinated mixed rare earth
- RE yl , RE >2 , ..., RE yn means rare earth element, wherein n is An integer greater than or equal to 2, the sum of yl+y2+...+yn is equal to 1.
- the dealuminizing agent is selected from the group consisting of organic acids (including ethylenediaminetetraacetic acid, oxalic acid, citric acid, sulfosalicylic acid), inorganic acids (including fluorosilicic acid, hydrochloric acid, sulfuric acid, nitric acid), Organic and inorganic salts (including ammonium oxalate, ammonium fluoride, ammonium fluorosilicate, ammonium fluoroborate).
- organic acids including ethylenediaminetetraacetic acid, oxalic acid, citric acid, sulfosalicylic acid
- inorganic acids including fluorosilicic acid, hydrochloric acid, sulfuric acid, nitric acid
- Organic and inorganic salts including ammonium oxalate, ammonium fluoride, ammonium fluorosilicate, ammonium fluoroborate.
- the preparation method of the modified Y-type molecular sieve according to the present invention comprises: using NaY zeolite as a raw material, after three exchanges and three hydrothermal treatments to obtain a modified Y-type molecular sieve, wherein the molecular sieve is separately added to the phosphorus-containing exchange in each exchange.
- the exchange of the solution or the rare earth-containing exchange solution is usually carried out at a temperature of 60 to 100 ° C, preferably 70 to 90 ° C, and the exchange is usually carried out for at least 0.5 hours, for example 1 - 2 hours; phosphorus is added in any exchange process, and may be added in one or several times; the rare earth is added in any exchange process other than one exchange; and a dealumination agent may be added in any exchange other than one exchange;
- the hydrothermal treatment is carried out independently at a temperature of 350 to 650 ° C, for example, 550 to 60 CTC, for 1 to 100%, for example, 70% to 100% of a water vapor atmosphere for at least 0.5 hours, for example, 1 to 2 hours.
- the exchange is carried out at a temperature of from 60 to 100 ° C, for example from 60 to 95 ° C, such as from 70 to 90 ° C.
- the exchange is carried out for 0.5-5 hours, for example 1-2 hours.
- the hydrothermal treatment is carried out at a temperature of from 350 to 650 ° C, for example from 550 to 600 ° C.
- the hydrothermal treatment is carried out in a 1-100%, for example 70%-100%, water vapor atmosphere.
- the hydrothermal treatment is carried out for at least 0.5 hours, for example 1-2 hours.
- the pH of the liquid to which the phosphorus-containing exchange solution or the rare earth-containing exchange solution has been added during the exchange can be adjusted with a mineral acid, for example, the pH is adjusted to 2-5, for example, 2.4-4.
- the inorganic acid is selected from one or more of hydrochloric acid, sulfuric acid, and nitric acid.
- a preferred preparation process can include the following steps:
- NaY zeolite (at least) is mixed with ammonium salt, phosphorus hinge salt and water according to NaY molecular sieve: ammonium salt: ammonium phosphate salt: :0.4-1:0-0.04:5-10, and the slurry is mixed with inorganic acid.
- the pH value is 3.0-4.5, and then washed at 70-95 ° C for at least 0.5 hours, wherein the NaY molecular sieve is based on the dry basis, and the ammonium phosphate salt is based on the elemental phosphorus;
- step 2) The product obtained in the step 1) is calcined at a temperature of 350-650 Torr, 1-100% water vapor atmosphere for at least 0.5 h to obtain a baked molecular sieve;
- step 4) The product obtained in the step 3) is calcined at a temperature of 350-650 ° C, 1-100% water vapor atmosphere for at least 0.5 hours to obtain a second baked molecular sieve;
- the product obtained in the step 5) is calcined at 350-650 ° C under a 1-100% steam atmosphere for at least 0.5 hours to obtain a modified Y-type molecular sieve.
- the invention adopts the "three-cross three-baking" process to prepare a high silicon-aluminum ratio and small unit cell modified molecular sieve, and the calcination condition is moderated, and the aluminum vacancy formed after the dealuminization can be filled with silicon as much as possible, and the lattice defects are few, the structure
- the hydrothermal stability and active hydrothermal stability are good, and the coke selectivity is good. Cracking active component
- other molecular sieves may be optionally contained in an amount of usually not more than 40% by weight, for example, 0.5 to 40% by weight, and 0.5 to 30% by weight.
- the other molecular sieves described therein may be selected from one or more of other Y-type molecular sieves commonly used in catalytic cracking catalysts, molecular sieves having an MFI structure, Beta zeolites, and non-zeolitic molecular sieves.
- the total content of the other molecular sieves does not exceed 40% by weight.
- the other Y-type molecular sieve is a Y-type molecular sieve other than the modified Y-type molecular sieve, such as one or more of REY, REHY, DASY, USY, REUSY molecular sieves.
- the REY, REHY, REUSY molecular sieves have a rare earth content of greater than 10% by weight. In one embodiment, the DASY molecular sieve has a rare earth content of less than 10% by weight.
- the molecular sieve having the MFI structure is, for example, one or more of ZSM-5, ZRP, and ZSP molecular sieves.
- the non-zeolitic molecular sieves are, for example, one or more of SAPO, titanium silicalite.
- the other molecular sieve comprises a REY molecular sieve and/or a DASY molecular sieve.
- the catalytic cracking catalyst contains from 3 to 15% by weight, based on the weight of the catalytic cracking catalyst, of REY molecular sieves and/or DASY molecular sieves on a dry basis.
- the other molecular sieve comprises (1) an ultra-stable Y-type molecular sieve containing magnesium, (2) a molecular sieve having an MFI structure, and (3) a rare earth-modified gas phase ultra-stable Y-type molecular sieve and/or At least one of the rare earth-containing acid-treated hydrothermally deaminated Y-type molecular sieves; based on the weight of the catalytic cracking catalyst, in an amount of from 0.5 to 30% by weight on a dry basis; in a further embodiment,
- the other molecular sieves also include REY molecular sieves and/or DASY molecular sieves.
- the other molecular sieve comprises (1) an ultra-stable Y-type molecular sieve containing magnesium, (2) a molecular sieve having an MFI structure, and (3) a rare earth-modified gas phase ultra-stable Y-type molecular sieve and/or Only one of the rare earth-containing acid-treated hydrothermally deaminated Y-type molecular sieves; based on the weight of the catalytic cracking catalyst, in an amount of from 0.5 to 30% by weight on a dry basis ; in a further embodiment, The other molecular sieves also include REY molecular sieves and/or DASY molecular sieves.
- the other molecular sieves do not include (1) ultra-stable Y-type molecular sieves containing magnesium, (2) molecular sieves having an MFI structure, and (3) rare earth-modified gas phase ultra-stable Y-type molecular sieves and/or Or Any of the rare earth acid-treated hydrothermally deaminated Y-type molecular sieves.
- Ultra-stable Y molecular sieve containing magnesium containing magnesium
- the magnesium-containing ultrastable Y type molecular sieve has a magnesium content of 0.1 to 25% by weight, preferably 0.5 to 25% by weight, based on the magnesium oxide.
- the molecular sieve may be prepared according to a conventional method, and one of the preparation methods may include, for example, a magnesium compound which is dissolved or sufficiently wet-ground (for example, at least one selected from the group consisting of magnesium oxide, magnesium chloride, magnesium sulfate, and magnesium nitrate).
- Uniformly dispersed in the ultra-stable Y-type molecular sieve (USY molecular sieve) slurry, with or without ammonia, mixed uniformly, dried and calcined; another preparation method may include, for example, ultra-stable Y-type molecular sieve after sufficient wet grinding (USY molecular sieve) is uniformly dispersed in a solution of a magnesium compound (for example, at least one selected from the group consisting of magnesium chloride, magnesium sulfate, and magnesium nitrate), mixed with ammonia water, and then sequentially filtered, washed, dried, and calcined.
- a magnesium compound for example, at least one selected from the group consisting of magnesium chloride, magnesium sulfate, and magnesium nitrate
- Molecular sieves having an MFI structure are commercially available or can be prepared according to existing methods.
- Examples of the molecular sieve having an MFI structure include one or more of ZSM-5, ZRP and ZSP molecular sieves.
- the anhydrous chemical composition of the molecular sieve having the MFI structure in terms of oxide weight ratio is: (0-0.3) ⁇ 3 2 ⁇ ⁇ (0.5-5.5) ⁇ 1 2 ⁇ 3 ⁇ ( 1.3-10) ⁇ 2 ⁇ 5 ⁇ (0.7-15) Ml x O y -(0.01-5)M2 m O n -(70-97)SiO 2 , where Ml is Fe, Co or Ni, and x represents Ml The number of atoms, y represents the number of oxygen required to satisfy the oxidation state of M1, M2 is selected from Zn, Mn, Ga or Sn, m represents the number of atoms of M2, and n represents the number of oxygen required to satisfy the oxidation state of M2.
- the molecular sieve having an MFI structure is based on an oxide weight ratio.
- M1 is Fe and M2 is Zn.
- the specific preparation method of the molecular sieve having the MFI structure can be referred to the patent application CN1611299A, particularly the examples 1-11 therein.
- Rare earth modified gas phase ultra-stable Y-type molecular sieve and/or rare earth-containing acid-treated hydrothermally deaminated Y-type molecular sieve can be referred to the patent application CN1611299A, particularly the examples 1-11 therein.
- Rare earth modified gas phase ultrastable Y type molecular sieves are commercially available or prepared according to existing methods.
- the rare earth modified gas phase ultrastable Y type molecular sieve can be prepared by the following method: under stirring, The rare earth-containing Y-type molecular sieve is contacted with silicon tetrachloride, the contact temperature is 100-500 ° C, the contact time is 0.1-10 hours, and the weight ratio of the rare earth-containing Y-type molecular sieve to silicon tetrachloride is 1: 0.05-0.5.
- the specific preparation method of the rare earth-modified gas phase ultra-stable Y-type molecular sieve can be referred to the patent CN1683244A or CN1286721C, especially the examples 5, 6 and 8 thereof.
- the rare earth-containing acid-treated hydrothermally deaminated Y-type molecular sieves are commercially available or can be prepared according to existing methods.
- the rare earth-containing acid-treated hydrothermally deaminated Y-type molecular sieve can be prepared by the following method: super-stable Y-type molecular sieve and an acid solution having a concentration of 0.01-2 N at a liquid-solid ratio (weight) 4-20 The ratio is thoroughly mixed at 20-100 ° C, washed for 10 to 300 minutes, washed, filtered, and then added with a rare earth salt solution for rare earth ion exchange, followed by washing, filtration and drying.
- the specific preparation method of the rare earth-containing acid-treated hydrothermally deaminated Y-type molecular sieve can be referred to the patent CN1958452A or CN100497175C, especially the examples 1-6 therein. clay
- the clay may be a clay commonly used in catalytic cracking catalysts, and may be, for example, kaolin, halloysite, montmorillonite, diatomaceous earth, halloysite, saponite, rectorite, sepiolite, One or more of attapulgite, hydrotalcite and bentonite. Binder
- the binder is one or more of the inorganic oxide binders commonly used in catalytic cracking catalysts, preferably alumina binders, which are selected from cracking catalysts.
- alumina binders which are selected from cracking catalysts.
- ⁇ -alumina, ⁇ -alumina, lanthanum-alumina, lanthanum-alumina, Pseudoboemite, Boehmite, Gibbsite or Bayer One or more of the stones (Bayerite), preferably a double aluminum binder of pseudoboehmite and aluminum sol.
- the catalytic cracking catalyst of the present invention comprises a cracking active component, 10% by weight to 70% by weight of clay based on dry basis and 10% by weight to 40% by weight of inorganic oxide bonded by oxide. And the weight of the catalytic cracking catalyst, wherein the cracking active component comprises: 10% by weight to 50% by weight, based on the weight of the catalytic cracking catalyst, of the modified Y molecular sieve and the dry basis - 40% by weight of other molecular sieves.
- the catalytic cracking catalyst of the present invention relative to the weight of the catalytic cracking catalyst, comprises: 10% by weight to 40% by weight of the inorganic oxide binder based on the oxide; and cracking active component
- the cracking active component comprises or consists essentially of or consists of:
- Y-type molecular sieve selected from one or more of REY, REHY, DASY, USY and REUSY in a dry basis of not more than 30% by weight, (excluding the above-mentioned ultra-stable Y-type molecular sieve containing magnesium, rare earth Modified gas phase ultra-stable Y-type molecular sieve and acid-treated hydrothermally dealuminated Y-type molecular sieve containing rare earth
- the clay is present in an amount of from 20 to 40% by weight, such as from 28 to 35% by weight.
- the inorganic oxide binder is present in an amount of from 15 to 35 wt%, such as about 30 wt%.
- the modified Y-type molecular sieve is present in an amount of from 5 to 40% by weight. In a further embodiment, the molecular sieve having the MFI structure is present in an amount of from 0.5 to 30% by weight, for example, from 2 to 28% by weight, for example, from 2 to 25% by weight, for example, from 2 to 15% by weight.
- the magnesium-containing ultrastable Y-type molecular sieve is present in an amount of from 0.5 to 30% by weight, for example, from 1 to 28% by weight, for example, from 1 to 25% by weight, for example, from 1 to 22% by weight. .
- the rare earth modified gas phase ultrastable Y type molecular sieve is present in an amount of from 0.5 to 30% by weight, for example, from 2 to 28% by weight, for example, from 2 to 25% by weight, for example, from 2 to 15 % by weight, for example, 2 to 13% by weight.
- the rare earth-containing acid-treated hydrothermally deaminated Y-type molecular sieve is present in an amount of from 0.5 to 30% by weight, for example, from 2 to 30% by weight.
- the content of one or more of the REY, REHY, DASY, USY, REUSY molecular sieves is from 0.5 to 30% by weight, for example, from 2 to 28% by weight, for example, from 2 to 25% by weight, for example , 2-15% by weight, for example, 3-13% by weight.
- the cracking active component comprises from 2 to 20% by weight, based on the dry basis, of REY molecular sieves, for example, from 5 to 12% by weight.
- the cracking active component comprises from 2 to 20% by weight, based on the dry basis, of a DASY molecular sieve, for example, from 3 to 13% by weight.
- the cracking active component consists of:
- the content of the component (B) multiplied by the content of the component (C) divided by the content of the component (A) is less than 0.01 or greater than 0.4.
- the REY molecular sieve has a rare earth content of more than 10% by weight
- the magnesium-containing ultrastable Y-type molecular sieve has a rare earth content of less than 4% by weight.
- the cracking active component consists of:
- the content of component (B) multiplied by the content of component (C) divided by the content of component (A) is greater than 0.45, for example greater than 0.5.
- the REY molecular sieve has a rare earth content of more than 10% by weight.
- a method for preparing a catalytic cracking catalyst comprises: providing a cracking active component comprising the modified Y-type molecular sieve, mixing and cracking the cracking active component, the clay and the inorganic oxide binder, and spray-drying.
- the molecular sieve analysis test method is as follows:
- the element content was determined by X-ray fluorescence spectrometry.
- the unit cell constant and crystallinity were determined by X-ray diffraction (XRD) using RIPP145-90 and RIPP146-90 standard methods (see “Petrochemical Analysis Methods (RIPP Test Method)", Yang Cuiding et al., Science Press, 1990 edition). .
- the crystal retention is the ratio of the crystallinity of the sample after the aging treatment to the sample before the aging treatment.
- Ratio measurement hydroxy nest concentration on TAQ5000IR thermogravimetric analyzer under a constant nitrogen flow, at a rate of 10 ° C / mi n, according to TGA analysis program was heated to 800 ° C, measured by thermal gravimetric analysis data the molecular sieve, And calculate the specific concentration of the hydroxy socket.
- rare earth chloride Chlorinated mixed rare earth (hereinafter referred to as rare earth chloride), industrial grade, specifications: ⁇ per liter (according to L 0 3 ) 153g and ⁇ (according to Ce 2 0 3 ) 69g 0
- rare earth chloride Chlorinated mixed rare earth
- NaY molecular sieves are used as raw materials for exchange with ammonium sulfate solution.
- Mix NaY molecular sieve, ammonium sulfate and water according to NaY molecular sieve (dry basis): ammonium sulfate: water 1: 1:8 ratio (weight ratio:), adjust the pH to 3.5 with sulfuric acid, and exchange at 85 °C. After an hour, it was filtered and washed with deionized water to give a post-cross molecular sieve.
- One baking hydrothermal baking treatment.
- the post-crosslinked molecular sieves were calcined at a calcination temperature of 580 ° C under conditions of 100% steam for 2 hours to obtain a baked molecular sieve.
- Two-way Treat a baked molecular sieve with a solution containing rare earth.
- Mixing a baked molecular sieve, rare earth chloride and water according to a ratio of a baked molecular sieve (dry basis:) rare earth chloride (according to RE 2 0 3 :): water 1: 0.042:8 (weight ratio)
- the exchange was carried out at 70 ° C for 1 hour, filtered, and washed with deionized water (water temperature ⁇ 50 ° C) to obtain a dimerized molecular sieve.
- Second baking hydrothermal roasting treatment.
- the bi-crosslinked molecular sieves were calcined at a calcination temperature of 580 ° C under conditions of 100% steam for 2 hours to obtain a second baked molecular sieve.
- the second baked molecular sieve is treated with a solution containing phosphoric acid and oxalic acid.
- the second baked molecular sieve, phosphoric acid, oxalic acid (containing two molecules of water of crystallization) and water according to the second baked molecular sieve (dry basis): phosphoric acid (in terms of P): oxalic acid (containing two molecules of water of crystallization): water 1: 0.014: The ratio of 0.14:8 (weight ratio) was mixed, the pH was adjusted to 2.8 with sulfuric acid, exchanged at 70 ° C for 1 hour, filtered, and washed with deionized water (water temperature ⁇ 50 ° C) to obtain a three-cross molecular sieve.
- a modified Y molecular sieve was prepared in accordance with the method of the patent CN 101537366A.
- an exchange solution containing 0.58% of REC1 3 and 6.8% of N C1 salt
- the modified molecular sieve that is, the molecular sieve, is calcined in the presence of 730 ° C and 70% steam for 2 hours.
- NaY molecular sieves are used as raw materials for exchange with ammonium chloride solution.
- Mix NaY molecular sieve, ammonium chloride and water according to NaY molecular sieve (dry basis): ammonium chloride: water 1:0.8:8 ratio (weight ratio), adjust the pH to 4.0 with hydrochloric acid, exchange at 90 °C After 1 hour, it was filtered and washed with deionized water to give a post-cross molecular sieve.
- One baking hydrothermal baking treatment.
- the post-crosslinked molecular sieves were calcined at a calcination temperature of 550 ° C under conditions of 80% steam for 2 hours to obtain a baked molecular sieve.
- Two exchanges treatment of a baked molecular sieve with phosphoric acid and fluorosilicic acid solution.
- a baked molecular sieve, phosphoric acid, fluorosilicic acid and water according to a baked molecular sieve (dry basis): phosphoric acid (in terms of P): fluorosilicic acid: water 1:0.01:0.03:8
- the ratio (weight ratio) was mixed, the pH was adjusted to 2.8 with hydrochloric acid, exchanged at 70 ° C for 1 hour, filtered, and washed with deionized water (water temperature ⁇ 50 ° C) to obtain a dimerized molecular sieve.
- Second baking hydrothermal roasting treatment.
- the post-distillation molecular sieves were calcined at a calcination temperature of 550 ° C under conditions of 70% steam for 2 hours to obtain a second baked molecular sieve.
- the second baked molecular sieve is treated with a solution containing rare earth.
- the exchange was carried out at 70 ° C for 1 hour, filtered, and washed with deionized water (water temperature ⁇ 50 ° C) to obtain a three-cross molecular sieve.
- a modified Y molecular sieve was prepared in accordance with the method of the patent CN 101537366A.
- the calcined product was poured into a reaction vessel containing 1200 g of an exchange solution (containing 0.44% of REC1 3 and 7.8% of N3 ⁇ 4C1 salt), exchanged at 90 ° C for 1 hour, and the solution pH was controlled to 6.0-6.5 during the exchange. After exchange, filter, wash,
- NaY molecular sieves are used as raw materials for exchange with ammonium sulfate solution.
- One baking hydrothermal baking treatment.
- the post-crosslinked molecular sieves were calcined at a calcination temperature of 580 ° C under conditions of 100% steam for 2 hours to obtain a baked molecular sieve.
- a baked molecular sieve is treated with a solution containing phosphate and oxalic acid.
- the pH was adjusted to 2.8, exchanged at 70 ° C for 1 hour, filtered, and washed with deionized water (water temperature ⁇ 50 ° C) to obtain a dimerized molecular sieve.
- Second baking hydrothermal roasting treatment.
- the bifilar molecular sieves were calcined at a calcination temperature of 550 ° C under conditions of 100% steam for 2 hours to obtain a second baked molecular sieve.
- the post-three-cross molecular sieves were calcined at a calcination temperature of 580 ° C under conditions of 100% steam for 2 hours to obtain a three-baked molecular sieve, i.e., a modified molecular sieve, i.e., molecular sieve A3.
- a modified Y molecular sieve was prepared in accordance with the method of the patent CN 101537366A.
- the calcined product was poured into a reaction vessel containing 400 g of an exchange solution (containing 0.60% of REC1 3 and 6.8% of N C1 salt), exchanged at 90 ° C for 1 hour, and the pH of the solution was controlled to 6.0-6.5 during the exchange. , after exchange, filtration, washing;
- an exchange solution containing 0.60% of REC1 3 and 6.8% of N C1 salt
- NaY molecular sieves are used as raw materials for exchange with solutions containing phosphate and ammonium sulfate.
- Mixing NaY molecular sieve, ammonium dihydrogen phosphate, ammonium sulfate and water according to NaY molecular sieve (dry basis): dihydrogen phosphate (in terms of P): ammonium sulfate: water 1:0.05: 1:8 ratio (weight ratio)
- the pH was adjusted to 3.0 with sulfuric acid, exchanged at 85 ° C for 1 hour, filtered, and washed with deionized water to give a post-cross molecular sieve.
- One baking hydrothermal baking treatment.
- the post-crosslinked molecular sieves were calcined at a calcination temperature of 580 ° C under conditions of 100% steam for 2 hours to obtain a baked molecular sieve.
- Second baking hydrothermal roasting treatment.
- the bifilar molecular sieves were calcined at a calcination temperature of 550 Torr under conditions of 100% steam for 2 hours to obtain a second baked molecular sieve.
- the second baked molecular sieve is treated with a solution containing rare earth.
- the 7CTC was exchanged for one hour, filtered, and washed with deionized water (water temperature ⁇ 50 ° C) to obtain a three-cross molecular sieve.
- a modified Y molecular sieve was prepared in accordance with the method of the patent CN 101537366A.
- an exchange solution containing 0.055% of REC1 3 and 7.8% of N C1 salt
- NaY molecular sieves are used as raw materials for exchange with solutions containing phosphate and barium sulfate.
- Mixing NaY molecular sieve, ammonium dihydrogen phosphate, ammonium sulfate and water according to NaY molecular sieve (dry basis): ammonium dihydrogen phosphate (in terms of P): ammonium sulfate: water 1:0.05:1:8 ratio (weight ratio)
- the pH was adjusted to 3.5 with sulfuric acid, exchanged at 90 ° C for 2 hours, filtered, and washed with deionized water to give a post-cross molecular sieve.
- One baking hydrothermal baking treatment. At a calcination temperature of 550 C, 100% water vapor under a condition of one The post-crossing molecular sieves were calcined for 2 hours to obtain a baked molecular sieve.
- Mixing a baked molecular sieve, rare earth chloride and water according to a baked molecular sieve (dry basis): rare earth chloride (according to RE 2 0 3 ): ⁇ ⁇ 1 : 0.02 : 8 ratio (weight ratio), at 85
- the mixture was exchanged at ° C for 1 hour, filtered, and washed with deionized water (water temperature ⁇ 50 ° C) to obtain a dimerized molecular sieve.
- Second baking hydrothermal roasting treatment.
- the bifilar molecular sieves were calcined at a calcination temperature of 58 CTC under the conditions of 100% steam for 2 hours to obtain a second baked molecular sieve.
- Sanjiao The second baked molecular sieve is treated with a solution containing phosphate and fluorosilicic acid.
- the second baked molecular sieve, diammonium hydrogen phosphate, fluorosilicic acid and water according to the second baked molecular sieve (dry basis): diammonium phosphate (in terms of P): fluorosilicic acid: water 1: 0.006: 0.03:8 Mix in proportion (weight ratio), adjust pH to 3.0 with hydrochloric acid, exchange at 70 ° C for 1 hour, filter, and wash with deionized water (water temperature ⁇ 50 ° C) to obtain three-cross molecular three-bake: hydrothermal Roasting treatment.
- the post-three-cross molecular sieves were calcined at a calcination temperature of 550 ° C under 100% water vapor for 2 hours to obtain a three-baked molecular sieve, i.e., a modified molecular sieve, i.e., molecular sieve A5.
- a modified Y molecular sieve was prepared in accordance with the method of the patent CN 101537366A.
- the calcined product was poured into a reaction vessel containing 100 g of exchange solution (containing 0.35% of REC1 3 and 7.8% of N C1 salt), and exchanged at 90 Torr.
- the modified solution i.e., molecular sieve B5
- was prepared by controlling the solution pH 6.0-6.5 during the exchange, filtering after exchange, washing, and calcining at 700 ° C, 70% steam for 2 hours.
- This example illustrates the hydrothermal structural stability of the modified Y molecular sieve of the present invention.
- the modified Y molecular sieve provided by the present invention has a significantly higher crystallinity and crystal retention than the comparative examples at different degrees of aging after hydrothermal aging treatment. It is indicated that the modified Y molecular sieve provided by the invention has better hydrothermal structure stability.
- This example illustrates the hydrothermal activity stability and coke selectivity of the modified Y molecular sieve of the present invention.
- the modified Y-type molecular sieve provided by the present invention reaches equilibrium activity quickly after initial rapid deactivation, and its equilibrium activity is significantly higher than that of the comparative example. It can be seen that the molecular sieve provided by the present invention has better activity stability than the comparative examples. As can be seen from Table 4 and Figure 4, the modified Y-type molecular sieve coke selectivity provided by the present invention is significantly better than that of the comparative molecular sieve.
- Example 2 100 87 82 77 66 62 Comparative Example 2 100 82 73 62 53 49 Example 3 100 85 80 73 65 60 Comparative Example 3 100 86 76 65 55 49 Example 4 100 87 79 70 60 55 Comparative Example 4 100 85 77 69 56 48 Table 3 Molecular sieve activity at different aging times
- the pseudo-boehmite is a commercial product of Shandong Aluminum Factory with a solid content of 60% by weight.
- Aluminium sol is a commercial product of Sinopec Catalyst Qilu Branch.
- the A1 2 0 3 content is 21.5 weight.
- the ratio of aluminum to aluminum is a weight ratio of hydrochloric acid having a concentration of 36% by weight to pseudoboehmite in terms of alumina.
- the magnesium-containing ultrastable Y type molecular sieve is obtained according to the method of Example 1 of CN1157465C. Hereinafter referred to as molecular sieve Z1.
- REY zeolite catalyst Qilu Petrochemical Branch commercially available product RE 2 0 3 content of 12 wt%, a solids content of 85 wt%.
- ZRP-1 molecular sieve is a molecular sieve with MFI structure containing phosphorus and rare earth. It is produced by Qilu Branch of Sinopec Catalyst. The content of RE 2 0 3 is 4%, the content of P is 2%, and the ratio of silicon to aluminum is 45.
- ZSP-1 molecular sieve is a molecular sieve with phosphorus and iron and having MFI structure. It is produced by Sinopec Catalyst Qilu Branch, with P content of 1.5% by weight and Fe 2 0 3 content of 2.5% by weight.
- DASY-2.0 molecular sieve is a commercial product of Sinopec Catalyst Qilu Branch, with a solid content of 87%. /. , RE 2 0 3 content 2%.
- the rare earth modified gas phase ultrastable Y type molecular sieve is obtained according to the method of Example 5 of Patent CN1286721C. Hereinafter referred to as molecular sieve Z2.
- the rare earth-containing acid-treated hydrothermally deaminated Y-type molecular sieve is obtained according to the method of Example 1 of the patent CN100497175C. Hereinafter referred to as molecular sieve Z3.
- microsphere catalyst dry basis 18 parts by weight of molecular sieve Z1 and dry basis 5 parts by weight of REY molecular sieve, after stirring, spray-drying to prepare a microsphere catalyst.
- the microsphere catalyst was calcined at 500 ° C for 1 hour and then washed with (N ) 2 SO 4 solution at 60 ° C ((NH 4 ) 2 S0 4 solution: microsphere catalysis : I0 weight ratio) to Na 2 0 content of less than 0.25% by weight, finally rinsed with deionized water, filtered and dried at 120 ° C to obtain catalytic cracking catalyst Cl.
- microsphere catalyst 1 part by weight of molecular sieve Z1 on a dry basis, and 8 parts by weight of REY molecular sieve on a dry basis, after stirring, were spray-dried to prepare a microsphere catalyst.
- the ratio to the Na 2 0 content is less than 0.25 wt%, and finally rinsed with deionized water, filtered and dried at 120 ° C to obtain a catalytic cracking catalyst C2.
- microsphere catalyst Formed into a microsphere catalyst.
- microsphere catalyst 10 parts by weight of molecular sieve Z1 and 10 parts by weight of REY molecular sieve, after stirring, were spray-dried to prepare a microsphere catalyst.
- a catalytic cracking catalyst was prepared according to the procedures of Catalyst Examples 1 - 5, except that the molecular sieves A1 - A5 were replaced by the molecular sieves B1 - B5 to prepare a catalytic cracking catalyst DC1-DC5.
- a catalytic cracking catalyst was prepared in accordance with the procedure of Catalyst Example 1, except that REY molecular sieve was not added, and molecular sieve A1 was added in an amount of 20 parts by weight to prepare a catalytic cracking catalyst C6.
- a catalytic cracking catalyst was prepared in accordance with the procedure of Catalyst Example 2, except that molecular sieve Z2 was used in its entirety, and molecular sieve A2 and REY molecular sieves were not used, thereby producing catalytic cracking catalyst DC6.
- the above catalytic cracking catalysts C1 - C6 and DC1-DC6 were aged at 800 ° C and 100% steam for 12 hours and then packed in a fixed fluidized bed FFB unit (provided by DJI Corporation of Sinopec Petrochemical Research Institute)
- the reaction performance of the catalytic cracking catalyst was evaluated, and the amount of the catalyst charged was 150 g.
- the feedstock oil having the properties shown in Table 1-1 was injected into the FFB apparatus for catalytic cracking reaction.
- Table 1-2 The results are shown in Table 1-2. 1
- Density g/cm 3 (20 ° C) 0.9171 Viscosity (100 ° C), mm 2 /s 10.61 Freezing point,. c 20 carbon residue, weight % 1.91 element content, weight 0 /o
- microsphere catalyst 5 parts by weight of REY molecular sieve on a dry basis, and 5 parts by weight of ZRP-1 molecular sieve on a dry basis, after stirring, were spray-dried to prepare a microsphere catalyst.
- microsphere catalyst 10 parts by weight of ZSP-1 molecular sieve and 8 parts by weight of REY molecular sieve, after stirring, were spray-dried to prepare a microsphere catalyst.
- the microsphere catalyst was calcined at 500 ° C for 1 hour, and then washed with (N ) 2 S0 4 solution at 60 Torr ((NH 4 ) 2 S0 4 solution: microsphere catalysis : 10 weight ratio) to Na 2 0 content of less than 0.25% by weight, finally rinsed with deionized water, filtered and dried at 120 ° C to obtain catalytic cracking catalyst C3.
- microsphere catalyst 10 parts by weight of ZRP-1 molecular sieve and 10 parts by weight of REY molecular sieve, after stirring, were spray-dried to prepare a microsphere catalyst.
- the weight ratio) to the Na 2 0 content is less than 0.25% by weight, and finally rinsed with deionized water, filtered and dried at 120 ° C to obtain a catalytic cracking catalyst C4.
- microsphere catalyst 15 parts by weight of ZSP-1 molecular sieve and 8 parts by weight of REY molecular sieve, after stirring, were spray-dried to prepare a microsphere catalyst.
- the catalytic cracking catalyst was prepared according to the procedures of Catalyst Examples 1-5, except that the molecular sieves B1 - B5 were used in place of the molecular sieves A1 - A5 to prepare catalytic cracking catalysts DC1 - DC5.
- a catalytic cracking catalyst was prepared according to the method of Catalyst Example 1, and an equivalent amount of ZRP-1 molecular sieve was used in place of the molecular sieve A1 to prepare a catalytic cracking catalyst DC6.
- the above catalytic cracking catalysts C1-C5 and DC1-DC6 were aged at 800 ° C, 100% water vapor for 8 hours, and the catalytic performance of the catalyst was determined by a small fixed fluidized bed ACE R+ device (designed by Kayser Technology Inc., USA). Production) Evaluation, the catalyst loading amount was 9 g.
- the catalytic mixed oil shown in Table 2-1 was injected into the ACE R+ apparatus for catalytic cracking reaction under the conditions of a reaction temperature of 520 ° C, a weight hourly space velocity of 16 h, and a ratio of the ratio of the oil to the weight of 4; The results are shown in Table 2-2. 1
- microsphere catalyst was calcined at 500 ° C for 1 hour, and then washed with a (N ) 2 SO 4 solution at 60 ° C ((N ) 2 S0 4 solution: microsphere catalyst: ⁇ 2 ⁇ 0.04:1 : 10 weight ratio) to Na 2 0 content of less than 0.25% by weight, finally rinsed with deionized water, filtered and dried at 12 CTC to obtain catalytic cracking catalyst C2.
- microsphere catalyst DASY-2.0 molecular sieve, after stirring, spray-drying to prepare a microsphere catalyst.
- microsphere catalyst 10 parts by weight of REY molecular sieve on a dry basis, and 13 parts by weight of DASY-2.0 molecular sieve on a dry basis, were further stirred, and spray-dried to prepare a microsphere catalyst.
- the ratio to the Na 2 0 content is less than 0.25 wt%, and finally rinsed with deionized water, filtered and dried at 12 CTC to obtain a catalytic cracking catalyst C5.
- a catalytic cracking catalyst was prepared according to the procedures of Catalyst Examples 1 - 5, except that the molecular sieves A1 - A5 were replaced by the molecular sieves B1 - B5 to prepare a catalytic cracking catalyst DC1-DC5.
- a catalytic cracking catalyst was prepared in accordance with the procedure of Catalyst Example 1, except that the molecular sieve Al was used in its entirety, and REY molecular sieve was not added, wherein the REY molecular sieve was replaced with an equal amount of molecular sieve A1 to prepare a catalytic cracking catalyst C6.
- the above catalytic cracking catalysts C1 - C6 and DC1-DC5 were aged at 800 ° C and 100% steam for 12 hours.
- the catalytic performance of the catalyst was determined by a small fixed fluidized bed ACE R + device (designed by Kayser Technology Inc., USA). Production) Evaluation, the catalyst loading amount was 9 g.
- the catalytic mixed oil shown in Table 3-1 was used as a feedstock oil to be injected into the ACE R+ apparatus for catalysis.
- the cracking reaction the results are shown in Table 3-2. Density, g/cm 3 (20 ° C) 0.9044 Viscosity (100 ° C), mm 2 /s 9.96 Freezing point,. c 40 carbon residue, weight% 3.0 element content, weight 0 /o
- microsphere catalyst 5 parts by weight of molecular sieve Z2 on a dry basis, stirring was continued, and spray-dried to prepare a microsphere catalyst.
- the microsphere catalyst was calcined at 500 ° C for 1 hour, and then washed with a (N ) 2 SO 4 solution at 60 ° C ((NH 4 ) 2 S0 4 solution: microsphere catalyst: ⁇ 2 ⁇ 0.04:1 : 10 by weight) to Na 2 0 content of less than 0.25% by weight, finally rinsed with deionized water, filtered and dried at 120 ° C to obtain catalytic cracking catalyst Cl.
- microsphere catalyst 13 parts by weight of molecular sieve Z2 and 2 parts by weight of molecular sieve Z3, after stirring, were spray-dried to prepare a microsphere catalyst.
- the ratio of Na 2 0 to less than 0.25% by weight was finally rinsed with deionized water, filtered and dried at 120 ° C to obtain a catalytic cracking catalyst C4.
- microsphere catalyst 30 parts by weight of molecular sieve Z3 and 5 parts by weight of DASY-2.0 molecular sieve, after stirring, were spray-dried to prepare a microsphere catalyst.
- a catalytic cracking catalyst was prepared according to the procedures of Catalyst Examples 1-5, except that the molecular sieves B1-B5 were used in place of the molecular sieves A1-A5 to prepare catalytic cracking catalysts DC1-DC5.
- a catalytic cracking catalyst was prepared in accordance with the procedure of Catalyst Example 1, except that the molecular sieve A1 was replaced by an equal amount of molecular sieve Z3 to prepare a catalytic cracking catalyst DC6.
- the above catalytic cracking catalysts C1 - C5 and DC1 - DC6 were aged at 800 ° C and 100% steam for 8 hours.
- the catalytic performance of the catalyst was determined by a small fixed fluidized bed ACE R + device (designed by Kayser Technology Inc., USA). Production) Evaluation, the catalyst loading amount was 9 g.
- the catalytic mixed oil shown in Table 4-1 was used as a feedstock oil at a reaction temperature of 518 ° C, a space velocity of 16 h - ', and a ratio of the ratio of the oil to the oil of 5.5 to be injected into the ACE R + apparatus for catalytic cracking. The results are shown in Table 4-2. 1
- Density g/cm 3 (20 ° C) 0.8994 Viscosity (100 ° C), mm 2 /s 5.63 Freezing point, °c 34 Carbon residue, % by weight 0.25 Alizarin content, Weight 0 /.
- Example 1 C1 1.24 12.45 56.51 17.02 9.65 3.13 73.33 77.06 4.27 Comparative Example 1 DC1 1.45 1 1.69 54.25 15.82 12.41 4.38 71.77 75.59 6.10
- Example 2 C2 1.33 12.22 55.97 17.65 9.32 3.51 73.03 76.64 4.81 Comparative Example 2 DC2 1.52 1 1.66 53.66 16.18 12.22 4.76 71.60 74.94 6.65
- Example 4 C4 1.02 11.11 52.39 19.40 13.24 2.84 67.36 77.78 4.22 Comparative Example 4 DC4 1.14 10.77 50.23 17.23 16.52 4.11 66.
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KR1020157002100A KR102048326B1 (ko) | 2012-06-27 | 2013-06-27 | 개질된 y형 분자체를 포함하는 접촉 분해 촉매 및 이의 제조 방법 |
JP2015518793A JP6232058B2 (ja) | 2012-06-27 | 2013-06-27 | 修飾されたy型ゼオライトを含有する接触分解の触媒およびその調製方法 |
MYPI2014704006A MY192232A (en) | 2012-06-27 | 2013-06-27 | Catalyst containing a modified y-type zeolite and a preparation process thereof |
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US9630171B2 (en) | 2017-04-25 |
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