31results about How to "Good product selection" patented technology

The invention discloses microcrystal NaY-type molecular sieves and a preparation method thereof. In the microcrystal NaY-type molecular sieves, the molar ratio of SiO2 to Al2O3 is 4.0 to 6.0, and the average particle size is 100 to 700 nanometers. The microcrystal NaY-type molecular sieves are prepared by a method combining low-temperature synthesis directing agent, low-temperature synthesis gel and two-stage variable-temperature dynamic crystallization. The NaY-type molecular sieves have a relative crystallinity of over 80 percent after being roasted in the air at 600 DEG C for 3 hours or after undergoing hydrothermal treatment with vapor at 650 DEG C for 1 hour, as well as high thermostability and hydrothermal stability.

The invention discloses a hydrocracking method which comprises the following steps that a straight-run diesel oil raw material is in contact with a hydrocracking catalyst to carry out hydrocracking reaction, and an obtained hydrocracking product is separated to obtain heavy naphtha, diesel oil, a jet fuel and hydrogenation tail oil, wherein the used hydrocracking catalyst adopts a modified Y-shaped molecular sieve, amorphous silica-alumina and aluminum oxide as carriers, and the modified Y-shaped molecular sieve is an Y-shaped molecular sieve which is rich in meso pores and is concentrated in effective pore size distribution. The hydrocracking method is particularly suitable for a hydrocracking technology for carrying out hydro-conversion on straight-run diesel oil to produce the jet fuel, and has very high catalytic activity and aviation fuel product yield and the quality of a product is improved.

The invention discloses a hydrocracking catalyst carrier and a preparation method thereof. The catalyst carrier adopts a large-grained and high-silicon modified Y type molecular sieve with centralized effective aperture distribution as the main cracking component, and takes amorphous silica-alumina as a second cracking component. The prepared hydrocracking catalyst has high activity and medium oil selectivity, and the produced middle distillate oil has good quality.

The present invention relates to a process for preparing arylpropenes, especially 1-methoxy-4-(1-propenyl)benzene (anethole), by means of thermolysis of the corresponding 1,1-diarylpropanes.

The invention discloses a modified Y type molecular sieve as well as a preparation method and application thereof. The Y type molecular sieve has the following properties: the crystal particle average diameter is 2.0 to 5.0 mu m, the relative crystallinity is 100 percent to 140 percent, the molar ratio of SiO2/Al2O3 is 30 to 100 and is preferably 40 to 100, the crystal cell parameter is 2.428 to 2.445nm, and the pore volume of a hole with the hole diameter being 2nm to 8nm accounts for 80 percent to 95 percent, preferably 80 percent to 90 percent of the total pore volume. The total acid content of NH3-TPD is 0.2 to 1.0mmol/g, wherein, the strong acid accounts for 75 percent or more of the total acid amount at the temperature larger than 250 DEG C, the pore volume of the Y type molecular sieve is 0.55cm<3>/g to 0.70cm<3>/g, and the specific surface area is 700m<2>/g to 1000m<2>/g. The molecular sieve has the advantages of large crystal particle, high crystalline, high silicon, more concentrated effective hole diameter distribution, favorable heat stability and hydrothermal stability and the like, and is suitable to be used for preparing a hydrogenation catalyst.

The present invention provides a process for the preparation of the asenapine intermediate of Formula (III) using a magnesium-methanol-acetic acid mixture.

The invention discloses a preparation method of a small-grain NaY-type molecular sieve. According to the invention, an amorphous silica-alumina precursor, a directing agent synthesized under a low temperature, part of a silicon source, and the like are mixed under a low temperature, such that silica-alumina gel is prepared; and crystallization is carried out, such that the small-grain NaY-type molecular sieve is obtained. According to the amorphous silica-alumina precursor, a part of a silicon-containing material is added in an aluminum-containing material before and/or during a gelling process; and the rest of the silicon-containing material is added after gelling and before aging, such that silica-alumina forms a stable structure, and can cooperate with subsequent steps. With the method, a phenomenon of silicon agglomeration or loss caused by the addition of a large amount of the silicon source in prior arts is avoided. The addition amount of silicon is reduced; silicon effective utilization rate is improved; the silica-to-alumina ratio is improved; and the obtained small-grain molecular sieve has good stability. The small-grain NaY-type molecular sieve provided by the invention can be used in a hydrocracking reaction, and has good cracking activity and product selectivity.

The invention discloses a hydrocracking catalyst and a preparation method thereof. The hydrocracking catalyst takes a modified Y-type molecular sieve which contains rich mesopores and has intensive effective pore diameter distribution as an acidic component; the modified Y-type molecular sieve has the following characteristics: the relative crystallization degree is 110 percent to 150 percent, the mol ratio of SiO2/Al2O3 is 10 to 50, the lattice parameter is 2.436nm to 2.445nm, the total pore volume is 0.55mL/g to 1.0mL/g and the mesopore pore volume accounts for 70 percent of the total pore volume or more. The hydrocracking catalyst disclosed by the invention is suitable for being used in a hydrocracking process of increasing the yield of high-quality heavy naphtha and has relatively high catalytic activity and product selectivity.

The invention relates to the field of hydrocracking, and particularly relates to a hydrocracking catalyst and a preparation method thereof and a heavy raw material oil hydrocracking method. The catalyst comprises a carrier and a supported metal accelerator, wherein the carrier is composed of a binder, a silicon-aluminum molecular sieve and an alkaline metal oxide; the total weight of the catalystis taken as a reference, the content of the silicon-aluminum molecular sieve is 10-65 wt %, the content of the metal accelerator is 1-30% by weight, the content of the alkaline metal oxide is 0.5-30 wt %, and the content of the binder is 5-50 wt %; the silicon-aluminum molecular sieve is a combination of a silicon-aluminum molecular sieve with a twelve-membered ring pore structure and a silicon-aluminum molecular sieve with an MFI structure. The hydrocracking catalyst disclosed by the invention is suitable for increased yield production of high-octane gasoline, the high-octane gasoline contains higher BTX, the product conversion rate is high, the product selectivity is good, the coke yield is relatively low, and the method is suitable for producing low-sulfur high-octane-value gasoline andliquefied gas for a long time.

The invention discloses a precipitated iron catalyst for Fischer-Tropsch synthesis and a preparation method thereof. The weight ratio of the components including Fe, Y, Ti, Cu, K and SiO2 in the catalyst is 100:(0.5-7.5):(0.4-11.2):(1.0-8.5):(1.0-7.0):(5-30), wherein Y, Ti and K exist in the form of oxide; Fe exists in the form of Fe2O3; Cu exists in the form of CuO. The catalyst provided by the invention has good activity and product selectivity, is capable of achieving high CO conversion rate and low CH4 and CO2 selectivity, increasing the main product, reducing the byproducts and reducing the environmental pollution on the premise of ensuring the raw material conversion rate and the effective product selectivity when being applied to Fischer-Tropsch synthesis for preparing oil products and paraffin, and is suitable for joint production of gasoline, diesel and high-quality paraffin in the large-scale fixed bed Fischer-Tropsch synthesis industry.

The invention relates to a method for preparing 1,5-diamino-decahydronaphthalene (H10NDA) by catalytic hydrogenation of 1,5-diaminonaphthalene (NDA), and is characterized in that: adding NDA and a solvent in a pressure reaction kettle, adding a load type nickel hydrogenation catalyst in an amount of 2.5 to 10% by mass, based on the addition amount of the reaction substrate NDA, replacing air in the reaction kettle with hydrogen for three times, then inletting hydrogen to make the reaction pressure of the reaction kettle reach 4.0 MPa, starting to stir, heating the reaction kettle to make the temperature reach 190 to 230 DEG C, replenishing hydrogen and maintaining the reaction pressure of the reaction kettle of 6 to 8 MPa, undergoing a thermostatic reaction for 5 to 8 h, and filtering out the catalyst after cooling to obtain H10NDA. The method can significantly improve the NDA conversion rate; and at the same time, the catalyst has low cost, simple preparation and long service life, and shows a good application prospect.

The invention discloses a hydrocracking catalyst and a preparation method thereof. The catalyst comprises hydrogenation activity metals and a carrier consisting of a modified small crystal particle Y-shaped molecular sieve and alumina, wherein the small crystal particle Y-shaped molecular sieve has the following properties: the SiO2/Al2O3 molar ratio is 10.0-120.0, the average diameter of the crystal particles is 100-700nm, the cell parameter is 2.436-2.445nm, sodium oxide is less than or equal to 0.1 weight percent, and the crystal retention rate is over 95 percent. The hydrocracking catalyst has the characteristics of high catalytic activity, high heavy naphtha selectivity, high potential aromatic hydrocarbon content, low bureau of mines correlation index (BMCI) value of hydrocracking tail oil and the like.

The invention relates to a production method of linear alkylbenzene. In the method, benzene and long-chain olefin are subjected to an alkylation reaction under the catalysis of a solid acid catalyst, and the solid acid catalyst comprises the following components in percentage by mass: 10-95% of a low-agglomeration-degree microcrystalline zeolite molecular sieve with a BEA topological structure and 5-90% of an inorganic oxide binder. The low-agglomeration-degree microcrystalline zeolite molecular sieve with the BEA topological structure is a beta zeolite molecular sieve, an XRD spectrogram of the low-agglomeration-degree microcrystalline zeolite molecular sieve has strong diffraction peaks at 2theta angles of 6.98 +/-0.5, 7.74 +/-0.5, 21.92 +/-0.5 and 22.11 +/-0.4 which are obviously widened, and the full width at half maximum is (0.60-0.71) degrees, (0.20-0.24) degrees, (0.33-0.41) degrees and (0.34-0.45) degrees respectively; the structure crystallite size is 10-50 nm, and the agglomerated particle size is 50-300 nm.

The invention discloses a hydrocracking catalyst carrier and a preparation method thereof. The hydrocracking catalyst carrier adopts a large-grained Y type molecular sieve with concentrated effective pore size distribution as the acidic component, is suitable for a hydrocracking catalyst for increase production of high quality heavy naphtha, and has very high catalytic activity and selectivity.