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53results about How to "High thermal and hydrothermal stability" patented technology

Catalyst used for synthesizing middle distillate from synthetic gas, its preparation method and application

A catalyst for synthesizing the intermediate oil from synthetic gas by Fischer-Tropsch reaction contains Co (5-35 Wt%), mesoporous ZrO2 as carrier (53-93), noble metal (0-2) and oxide of non-noble metal. Its preparing process includes such steps as impregnating said carrier in the aqueous solution of nitrate containing the oxide of non-noble metal or the alcohol solution of organic alkydester, and impregnating it in the equeous solution of cobalt nitrate and the nitrate (or chloride) or noble metal. It has high activity, stability, selectivity and mechanical performance.
Owner:SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI

Light oil type hydrocracking catalyst with composite molecular sieve as well as preparation method and application thereof

The invention discloses a light oil type hydrocracking catalyst with a composite molecular sieve. The hydrocracking catalyst comprises the composite molecular sieve consisting of a modified Y-molecular sieve and a modified ZSM-23 molecular sieve, a carrier composed of micropore aluminum oxides, and a hydrogenation activity component composed of a VIB group metal and a VIII group metal. The hydrocracking catalyst is characterized in that the composite molecular sieve comprises the modified Y-molecular sieve and the modified ZSM-23 molecular sieve, and the Y-molecular sieve is modified and dealuminized, so that heat stability and hydrothermal stability are stably enhanced, the hydrophobicity is enhanced, the absorption and desorption properties of the molecular sieve are improved, and the catalyst achieves a high catalytic cracking property. The pore passages of the modified SM-23 molecular sieve are unobstructed, the number of the acid sites is small, the isomerism property is outstanding, and the octane value of the molecular sieve is increased because of light naphtha components. The modified Y-molecular sieve and the modified ZSM-23 molecular sieve are mixed and used according to a formula ratio of the hydrocracking catalyst, so that both the cracking activity and the isomerism property are considered, and the final catalyst achieves an ideal catalytic effect.
Owner:CHINA NAT OFFSHORE OIL CORP +3

Method for preparing aluminium-containing MCM-41 molecular sieve

The invention provides a method for preparing an aluminized molecular sieve of MCM-41 (ALMCM-41). The method adopts pseudo-boehmite as aluminum source, sodium silicate as silica source, and cety ltrimethyl ammonium bromide as template. By adopting dilute sulfuric acid to regulate acid, the molecular sieve of ALMCM-41 with high hydrothermal stability is prepared thereby. The invention solves the problem of poor hydrothermal stability of the ALMCM-41 in the prior art. The crystallization retention rate of the molecular sieve of ALMCM-41 prepared in the invention can reach 15 to 50 percent after the ALMCM-41 is aged in 100 percent of steam with temperature of 800 DEG C for 2 hours. The invention can be applied in the industrial preparation of the molecular sieve of ALMCM-41.
Owner:CHINA UNIV OF PETROLEUM (BEIJING)

Super-stable Y-type molecular sieve containing phosphorus and rare earth, and preparation method thereof

The invention relates to a super-stable Y-type molecular sieve containing phosphorus and rare earth, wherein the Y-type molecular sieve contains 4-11 wt% of rare earth, 0.05-10 wt% of phosphorus and 0.1-0.7 wt% of sodium oxide, and has the pore volume of 0.33-0.39 mL / g, the pore volume of the pores with the pore size of 2-100 nm accounts for 15-30% of the total pore volume, the unit cell constantis 2.440-2.455 nm, the non-framework aluminum accounts for less than 20% of the total aluminum, the lattice collapse temperature is more than 1050 DEG C, and a ratio of the amount of B acid to the amount of L acid is not less than 2.50. The preparation method comprises: preparing a rare earth-containing Y-type molecular sieve having a conventional unit cell size, calcining for 4.5-7 h at a temperature of 350-480 DEG C under 30-90% by volume of steam atmosphere, carrying out phosphorus modification treatment, and carrying out a contact reaction with silicon tetrachloride gas. According to the present invention, the Y-type molecular sieve has advantages of good hydrothermal stability, high heavy oil conversion activity, low coke selectivity, high heavy oil conversion diesel yield, high liquefied gas yield and high total liquid recovery.
Owner:CHINA PETROLEUM & CHEM CORP +1

Catalytic cracking catalyst and preparation method thereof

The invention relates to a catalytic cracking catalyst and a preparation method. The catalytic cracking catalyst contains a cracking activity component, clay and an adhesive, wherein the cracking activity component comprises a rare-earth Y-type molecular sieve; and the rare-earth content in the Y-type molecular sieve is 10-25 wt% on the basis of rare-earth oxides, the cell constant is 2.440-2.472nm, the crystallinity is 35-65%, the silicon / aluminum atomic ratio in the framework is 2.5-5.0, and the product of the ratio (I1 / I2) of 2theta=11.8+ / -0.1 degree peak intensity I1 to 2theta=12.3+ / -0.1 degree peak intensity I2 in an X-ray diffraction pattern and the rare-earth weight percent in the molecular sieve on the basis of rare-earth oxides is greater than 50. The preparation method comprises the following steps: preparing a mixed slurry containing the cracking activity component, adhesive and clay, carrying out spray drying, washing and drying. Compared with the prior art, the rare-earth-containing Y-type molecular sieve has higher structural stability and activity stability; and the catalyst has higher thermal and hydrothermal stability, and can reduce the consumption of the molecular sieves in the catalyst, thereby lowering the catalyst production cost.
Owner:CHINA PETROLEUM & CHEM CORP +1

Method for producing low-carbon olefin

The invention relates to a method for producing a low-carbon olefin, mainly solving the problems that in the prior art, the olefin contained in a reactant is easily coked and the light olefin as a product is poor in selectivity due to the high reaction temperature; and the device productivity is low and the separation cost is high due to the utilization of a large number of diluents. The method provided by the invention comprises the following steps: by taking an aliphatic hydrocarbon flow liquid which is lack of the olefin as a raw material, contacting the raw material with aZSM molecular sieve catalyst to carry out cracking reaction to generate flow liquid rich in propylene and ethylene under the conditions that reaction temperature is 500-700 DEG C, the weight ratio of a diluting agent to the raw material is (0-3):1, reaction pressure is in a range from -0.08 MPa to 0.2MPa and the liquid-phase space velocity is from 0.5 to 15 per hour. According to the adopted technical scheme, the problems are solved well. The method provided by the invention can be applied to the industrial production of the low-carbon olefin.
Owner:CHINA PETROLEUM & CHEM CORP +1

A kind of ultra-stable Y-type molecular sieve containing phosphorus and rare earth and preparation method thereof

The invention relates to a super-stable Y-type molecular sieve containing phosphorus and rare earth, wherein the Y-type molecular sieve contains 4-11 wt% of rare earth, 0.05-10 wt% of phosphorus and 0.1-0.7 wt% of sodium oxide, and has the pore volume of 0.33-0.39 mL / g, the pore volume of the pores with the pore size of 2-100 nm accounts for 15-30% of the total pore volume, the unit cell constantis 2.440-2.455 nm, the non-framework aluminum accounts for less than 20% of the total aluminum, the lattice collapse temperature is more than 1050 DEG C, and a ratio of the amount of B acid to the amount of L acid is not less than 2.50. The preparation method comprises: preparing a rare earth-containing Y-type molecular sieve having a conventional unit cell size, calcining for 4.5-7 h at a temperature of 350-480 DEG C under 30-90% by volume of steam atmosphere, carrying out phosphorus modification treatment, and carrying out a contact reaction with silicon tetrachloride gas. According to the present invention, the Y-type molecular sieve has advantages of good hydrothermal stability, high heavy oil conversion activity, low coke selectivity, high heavy oil conversion diesel yield, high liquefied gas yield and high total liquid recovery.
Owner:CHINA PETROLEUM & CHEM CORP +1

High-stability modified Y-type molecular sieve for high production of isomerized C4 and preparation method of high-stability modified Y-type molecular sieve

The invention discloses a high-stability modified Y-type molecular sieve for high production of isomerized C4 and a preparation method of the high-stability modified Y-type molecular sieve. The CaO content of the modified Y-type molecular sieve is 0.3-4 wt%, the RE2O3 content is 2 to 7 wt%; the content of Na2O is 0.1 to 0.5 wt%; the total pore volume is 0.33 mL/g to 0.39 mL/g; the pore volume of the secondary pores of 2-100nm accounts for 10-25% of the total pore volume; the lattice constant is 2.440-2.455 nm, the content of non-framework aluminum accounts for not more than 20% of the total aluminum content, the lattice collapse temperature is not lower than 1050 DEG C, and the ratio of the amount of acid B to the amount of acid L measured by a pyridine adsorption infrared method at 200 DEG C is not lower than 2.30. The preparation method comprises the steps of ion exchange, modification treatment under certain temperature and water vapor conditions and reaction with silicon tetrachloride. The modified Y-type molecular sieve has higher heavy oil conversion activity, lower coke selectivity, higher gasoline yield and isomeric C4 yield, and higher isomeric hydrocarbon content in gasoline.
Owner:CHINA PETROLEUM & CHEM CORP +1

Modified Y-type molecular sieve and a preparation method thereof

One embodiment of the invention provides a modified Y-type molecular sieve and a preparation method thereof, wherein the modified Y-type molecular sieve comprises 4-11 wt% of rare earth (calculated asrare earth oxide), not more than 0.7 wt% of sodium (calculated as sodium oxide), 0.5-5 wt% of zinc (calculated as zinc oxide), and 0.05-10 wt% of phosphorus (calculated as phosphorus pentoxide), theskeleton silicon-alumina ratio is 7-14 based on SiO2 / Al2O3 molar ratio, the mass of the non-skeleton aluminum accounts for not more than 20% of the total aluminum mass, and the pore volume of secondary pores with a pore size of 2-100 nm accounts for 15-30% of the total pore volume. According to the invention, the modified Y-type molecular sieve contains phosphorus, rare earth and zinc modificationcomponents, has advantages of high crystallinity, high thermal stability, high hydrothermal stability and rich secondary pores, is used for catalytic cracking of hydrogenated LCO (light cycle oil), and has advantages of low coke selectivity and high conversion efficiency of reactants.
Owner:CHINA PETROLEUM & CHEM CORP +1

A rare earth-containing modified Y-type molecular sieve rich in secondary pores and its preparation method

The invention provides a secondary-pore-rich modified Y type molecular sieve containing rare earth, and a preparation method thereof. In the modified Y type molecular sieve, the content of rare earthis 5 to 12 wt%; the content of sodium is no more than 0.5 wt%; a total pore volume is 0.36 to 0.48 mL / g; the pore volume of secondary pores accounts for 20 to 38% of the total pore volume; a lattice constant is 2.440 nm to 2.455 nm; the content of non-framework aluminum is no more than 10% of total aluminum content; lattice collapse temperature is higher than 1060 DEG C; and a ratio of the amountof acid B to the amount of acid L is no less than 3.50. A preparation method for the modified Y type molecular sieve comprises the following steps: preparing a rare earth-containing Y type molecular sieve with a conventional cell size; carrying out roasting in a water vapor atmosphere with a temperature of 350 to 520 DEG C and a volume percentage of 30 to 95% for 4.5 to 7 h; carrying out a contactreaction with silicon tetrachloride; and carrying out acid treatment. The modified Y type molecular sieve has higher heavy oil conversion activity, low coke selectivity, and higher diesel oil yield,light oil yield and total liquid yield.
Owner:CHINA PETROLEUM & CHEM CORP +1
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