19results about How to "Improve cracking capacity" patented technology

The invention discloses an additive for improving the octane number of propylene and gasoline as well as a preparation method and application thereof, and belongs to the technical field of catalyst preparation and application. The additive for improving the octane number of propylene and gasoline comprises 20-65% of a regular ZSM-5 molecular sieve, 0-25% of other molecular sieves, 3-30% of P2O5, 3-18% of a binder and the balance of clay, wherein the total percentage is 100%. The specific surface area of the regular ZSM-5 molecular sieve is 300-510 m < 2 > / g, the micropore volume is 0.20-0.42 mL / g, the mesopore volume is 0.10-0.27 mL / g, the grain size is 30-300 nm, and the silica-alumina ratio is 20-180. The regular ZSM-5 molecular sieve prepared without the template agent is high in yield, high in crystallinity, excellent in acid property and open in pore structure. The additive for improving the octane number of the propylene and the gasoline contains a regular ZSM-5 molecular sieve and is subjected to phosphorus compound modification, so that the catalytic activity and the shape-selective cracking capability are synchronously improved, the cracking capability of low-octane number alkane components is improved, the propylene yield and the octane number of the gasoline are greatly improved, and the manufacturing cost is effectively reduced.

The invention belongs to the technical field of cracking machines, and particularly relates to a high-frequency heating and stirring type cracking machine for solid waste recycling, aiming at the problems in the prior art, the high-frequency heating and stirring type cracking machine comprises a furnace body, an auxiliary mechanism is arranged in the furnace body, and the auxiliary mechanism comprises a rotating cylinder rotationally connected to the inner wall of the circumferential side face of the furnace body; the outer wall of one face of the furnace body is rotationally connected with a first rotating shaft, the other end of the first rotating shaft extends into the rotating cylinder, and the circumferential side face of the first rotating shaft is rotationally connected with a round block. According to the solid waste pyrolysis device, solid waste is fed into the rotating cylinder through the arranged scraping plate, the high-frequency heater body is started, the high-frequency heater body conducts heating pyrolysis on the solid waste through the spiral heating body, the high-frequency heater body conducts high-frequency heating on the solid waste, and the solid waste can be pyrolyzed through the spiral heating body; the cracking speed of the solid waste is increased, energy consumption of the device is reduced, a motor is started to drive a first rotating shaft to rotate, and the first rotating shaft drives a second spiral plate to rotate.

The invention belongs to the technical field of autoimmune skin disease immunotherapy, and provides a three-target novel chimeric autoantibody receptor structure which comprises three chimeric receptors through two connecting peptides, specifically, a first chimeric autoantibody receptor comprises a Dsg1 extracellular structural domain; the second chimeric autoantibody receptor comprises a Dsg3 extracellular structural domain; the third chimeric antigen receptor comprises an extracellular domain capable of targeting a B cell associated antigen; wherein the Dsg1 extracellular structural domain is an extracellular structural domain of desmosome core glycoprotein 1; the Dsg3 extracellular structural domain is the extracellular structural domain of desmosome core glycoprotein 3. In-vitro experiments and animal experiments verify that the novel three-target CAAR-T cells can significantly increase the release of cytokines, enhance the targeted killing activity of the cytokines, and show better multiplication capacity; a novel cellular immunotherapy technology is provided for treating autoimmune skin diseases, and the application of CAAR-T in the field of autoimmune disease treatment can be expanded.

The present invention relates to the field of genetic engineering technology, and in particular to a CsCCD2 mutant, gene and application of saffron, and a recombinant model organism for producing crocetin. The protein sequence of the CsCCD2 mutant of the present invention is compared with the protein sequence of the wild-type CsCCD2, and it has a 14-amino acid deletion at the second amino acid. The present invention improves its binding ability and cleavage ability with zeaxanthin by protein modification of the CsCCD2 enzyme derived from saffron, and has the advantages of being more environmentally friendly and low-cost for the biosynthesis of crocetin, and provides a feasible method for the production of crocetin. And the efficiency of the engineering bacteria provided by the present invention in producing crocetin is high, and the concentration of crocetin can reach 1.20mg / g after fermentation for 72h.

This invention discloses an *Escherichia coli* bacteriophage, specifically *Escherichia coli* bacteriophage RDP-EC-22219, with accession number CGMCC No. 45442. This invention also provides a bacteriophage composition comprising *Escherichia coli* bacteriophage RDP-EC-22219 as described above and other bacteriophages. Preferably, the bacteriophage composition comprises *Escherichia coli* bacteriophage RDP-EC-22219, *Escherichia coli* bacteriophage RDP-EC-22216, and *Escherichia coli* bacteriophage RDP-EC-22220; the accession number of *Escherichia coli* bacteriophage RDP-EC-22216 is CGMCC No. 45439; and the accession number of *Escherichia coli* bacteriophage RDP-EC-22220 is CGMCC No. 45443. This invention also provides the use of Escherichia coli bacteriophages and the phage composition thereof in the preparation of medicaments for the prevention and treatment of diseases caused by Escherichia coli. The phage composition provided by this invention has significantly improved lytic activity compared to a single Escherichia coli bacteriophage, and can be used for the prevention and treatment of diseases caused by Escherichia coli, while also having the advantages of safety and no side effects.

The invention discloses xanthomonas citri subsp.citri phage and application thereof, and relates to the technical field of biology. The xanthomonas citrus subspecies phage is preserved in the China Center for Type Culture Collection on July 4, 2024, the preservation address is Wuhan University, Wuhan, China, and the preservation number is CCTCC NO: M 20241486. The xanthomonas citrus subsp.citri bacteriophage can specifically inactivate the xanthomonas citrus subsp.citri, mass proliferation can be completed only with a small amount of initial bacteriophage, and a high-quality bacteriophage strain source is provided for industrial production of bacteriophage bactericides; technicists in the field can prepare various products applied to the aspects of detection, disinfection, plant protection and the like from the xanthomonas citrus subsp.citri phage provided by the invention according to records and common knowledge in the field by technicians in the field, and the products are industrially applied to the xanthomonas citrus subsp.citri phage.

The application discloses a kit based on gravity-driven liquid flow, comprising a box body, a liquid storage area and a reaction area arranged from top to bottom in the box body, the liquid storage area comprising a liquid flow channel and a plurality of liquid storage rods arranged on the liquid flow channel, the liquid storage rods storing liquid, the liquid storage rods being provided with liquid flow holes, the liquid storage rods being capable of sliding on the liquid storage area so that the liquid flow holes are communicated with the liquid flow channel, the reaction area comprising a reaction chamber, the reaction chamber being communicated with the liquid flow channel, when the liquid flow holes are communicated with the liquid flow channel, the liquid can flow into the reaction chamber under the action of gravity, the lower end of the reaction area being provided with a waste liquid area and an amplification area, the reaction area being provided with an isolation column at a connecting end of the waste liquid area and the amplification area, the isolation column being provided with a communication hole, the isolation column being capable of sliding on the reaction area so that the communication hole communicates the reaction area with the waste liquid area or the amplification area, so that the liquid in the reaction area flows to the waste liquid area or the amplification area under the action of gravity.

The utility model discloses a solid waste household garbage cracking condenser, and relates to the technical field of solid waste household garbage cracking, in particular to the solid waste household garbage cracking condenser which comprises a base, a treatment box is fixedly installed at the top of the base, a stirring shaft is rotationally connected into the treatment box, a stirring frame is fixedly installed on the outer side of the stirring shaft, and the stirring frame is fixedly installed on the outer side of the stirring shaft. A driven belt wheel is fixedly mounted at one end of the stirring shaft, a motor frame is fixedly mounted on one side of the treatment box, a driving motor is fixedly mounted at the top of the motor frame, and a driving belt wheel is fixedly mounted at the output end of the driving motor. According to the solid waste household garbage cracking condenser, through the arrangement of the stirring frame, the solid waste household garbage cracking condenser has the effect of conveniently turning over solid waste household garbage, so that the effect of relatively high cracking effect is achieved, and the purpose of improving the cracking efficiency is achieved.

The application belongs to the field of petroleum refining catalysis technology, and discloses a ZSM-5 additive for increasing propylene production and a preparation and use method thereof. In the method, waste filtrate prepared by using SAPO-34 molecular sieve is used to improve the stability of the molecular sieve under a high-temperature water-containing atmosphere, prevent the molecular sieve channels from being blocked by excessive phosphorus elements, reduce environmental pollution caused by the waste filtrate, improve the specific surface area of the ZSM-5 additive and the stability of the product, realize the dual effects of the stabilization of the molecular sieve by the phosphorus elements and the protection of the organic ammonium channels, complement the low-molecular-weight ammonium polyacrylate, white carbon black and phosphorus aluminum binder, construct a hierarchical pore structure (micropore-mesopore-macropore hierarchical pore), and then obtain the additive with a specific surface area of 150-170 m 2 / g, an addition amount of only 10 wt% can achieve a propylene production effect better than that of 20 wt% of a commercially available additive, the catalyst procurement cost of a refinery is greatly reduced, and the slurry oil yield is reduced and the heavy oil cracking capacity is improved.

The present invention discloses a broad host spectrum resistant Acinetobacter baumannii phage and its composition and application. The Acinetobacter baumannii phage, phage CP‑p‑AB‑21033, has a deposit number of CGMCC 45410; the phage was deposited in the China General Microbiological Culture Collection Management Center on January 9, 2023, and was classified and named as Podoviridae. CP‑p‑AB‑21033 itself has a wide host spectrum and can lyse no less than 31 strains of carbapenem-resistant Acinetobacter baumannii. It has great potential in clinical applications and is a relatively ideal choice. It should not be replaced by others. The phage CP‑p‑AB‑21033 is combined with one or more of the other 7 phages provided by the present invention to form a composition, which broadens the host spectrum and lysis ability, and has broad application potential in the clinical treatment of resistant Acinetobacter baumannii infections and environmental purification.

The present invention discloses a chimeric antigen receptor for secreting IL10 targeting BAFFR, CAR-T cells and applications. The chimeric antigen receptor for secreting IL10 targeting BAFFR includes a signal peptide region, an antigen binding domain targeting BAFFR, a hinge region, a transmembrane domain, a co-stimulatory domain, a signal transduction domain and human IL10 connected in sequence from the amino terminus to the carboxyl terminus; the co-stimulatory domain includes a connected CD28 co-stimulatory domain and a 4-1BB co-stimulatory domain, and the signal transduction domain is ITAM1 of CD3ζ. The present invention can specifically target autoimmune B cells, avoiding immunodeficiency caused by full B cell deletion and infection of patients. The secretion of IL10 on CAR-T cells will reduce the exhaustion rate of CAR-T cells in vivo, thereby playing a long-term inhibitory effect on the disease process.

The application discloses a dust removing device, which comprises a dust remover box body, a plurality of groups of filter cores arranged in the dust remover box body, and a pulse member for pulse cleaning of the filter cores and installed on the outer side of the upper end of the dust remover box body. The dust removing device combines the pulse member and the inner support and scale breaking mechanism, can exert periodic inner support and micro deformation on the skeleton from the inner side of the filter core, can cause the hard shell dust layer adhered to the outer surface of the filter core to crack, can first destroy the overall continuity and adhesion stability of the dust layer, can then spray pulse gas into the filter core, can make the pulse gas flow into the cracks of the cracked dust layer and the wrinkle area of the filter core, can strip and blow off the loosened dust layer from the surface of the filter core, can improve the dust cleaning success rate of the adhesive dust, and can slow down the continuous increase of the pressure difference of the filter core.

The application discloses a catalyst for biomass gasification hydrogen production, a preparation method of the catalyst and a hydrogen production method. The preparation method comprises the following steps: uniformly mixing a doping component A and a doping component B to obtain a material flow I; adding an anionic surfactant and a first precipitator into a calcium salt solution, controlling the pH of the system to be 8-9, and then uniformly mixing at 40-60 DEG C to obtain a material flow II; adding the material flow I, a second precipitator and a third precipitator into the material flow II, uniformly mixing at 70-80 DEG C to obtain a material flow III, and further performing heat treatment to obtain the catalyst. The application also provides the catalyst prepared by the above method and a hydrogen production method by biomass gasification. The application overcomes the densification problem of the adsorption and desorption process of the conventional calcium-based absorbent, and further realizes the double goals of biomass production of high-quality hydrogen and recycling of the calcium-based absorbent through matching of the double fluidized bed process.

The invention relates to a method and system for producing ethylene and propylene from heavy oil, and the method comprises the following steps: introducing heavy hydrocarbon oil into a supercritical extraction separation unit for supercritical extraction separation to respectively obtain light deasphalted oil, heavy deasphalted oil and deoiled asphalt; carrying out hydrotreating on the deoiled asphalt to obtain hydrogenated deoiled asphalt; introducing the heavy deasphalted oil and the hydrogenated deoiled asphalt into a first reactor to be in contact with a first catalytic conversion catalyst for a first catalytic conversion reaction; introducing the light deasphalted oil into a second reactor to contact with a second catalytic conversion catalyst for a second catalytic conversion reaction; wherein the first catalytic conversion catalyst and the second catalytic conversion catalyst contain MPZ hierarchical pore molecular sieves. According to the method disclosed by the invention, polycyclic aromatic hydrocarbon which is not easy to react can be saturated, the cracking property of the deoiled asphalt is improved, the generation of coke is reduced, and the yields of ethylene and propylene are improved.

The application discloses a kind of splitting assembly and tissue dissociation device, the splitting assembly includes dissociation cylinder and splitting knife, the dissociation cylinder has a dissociation cavity, the dissociation cavity is used to hold dissociation liquid with tissue, the bottom wall of the dissociation cavity is provided with a plurality of fixed blades, a plurality of the fixed blades are arranged along the circumference, the splitting knife is rotatably installed in the dissociation cavity along the axis extending upwards and downwards, the splitting knife includes at least two first blades spaced along the circumference and spirally arranged along the upwards and downwards, the splitting gap is formed between two the first blades and a plurality of the fixed blades, two the first blades and a plurality of the fixed blades cooperate to grind the tissue block in the splitting gap to obtain homogenate solution. By controlling the rotation speed and direction of the splitting knife, different effects can be achieved with a plurality of the fixed blades. When rotating forward, the tissue is broken, and when rotating backward, the tissue is incubated. The effect of tissue block splitting can be improved.

The invention relates to a preparation method of a catalytic cracking catalyst. The method comprises the following steps: carrying out contact treatment on a NaY molecular sieve and a rare earth salt solution or a mixed solution of the rare earth salt solution and an ammonium salt solution, filtering and washing to obtain preparation raw materials including the rare earth-containing NaY molecular sieve, an inorganic oxide binder and natural minerals, mixing, pulping and molding; carrying out deacidification treatment on the formed catalyst, so that the content of Cl <-> on the basis of the catalyst is reduced to be less than or equal to 1.5 wt%; and performing hydrothermal roasting treatment on the deacidified molded catalyst in an atmosphere environment in which pressure is applied externally and an aqueous solution containing an acidic substance or an alkaline substance is added externally, and removing alkali metal through ammonium exchange. According to the method, under the condition that the chlorine content in the catalyst is reduced, the damage of a large amount of released hydrochloric acid gas to a rare earth NaY molecular sieve crystal structure in the catalyst is relieved, so that the cracking performance of the catalyst is improved.

The invention discloses a preparation method of a catalytic cracking aid capable of reducing coke yield and increasing diesel yield, which comprises the following steps: mixing pseudo-boehmite and deionized water, adding an acidic material for peptizing treatment, then mixing with magnesium oxide slurry, and adding a surfactant for crystallization reaction to obtain the catalytic cracking aid. According to the catalytic cracking aid, the acidized pseudo-boehmite and the magnesium oxide slurry are mixed and then crystallized under the action of the surfactant, and the obtained catalytic cracking aid can increase the content of an aluminum oxide matrix and increase the number of mesopores while reducing the molecular sieve content and the acid content. The catalytic cracking aid can control the amount of strong Lewis acid in a catalyst matrix, the amount of strong Lewis acid sites tending to generate coke is avoided, and the yield of diesel oil is increased while the yield of coke is reduced.

The invention discloses a method for preparing a core-shell structure hydrocracking catalyst, comprising: (1) adding a sodium aluminate solution, a sodium molybdate solution and a CO2 gas to a Ni-containing solution A in parallel to perform a first gelling reaction, aging, obtaining a first slurry, filtering to obtain a filter cake, and then mixing with an aluminum salt and an organic alcohol aqueous solution to form a slurry; (2) the Ni-containing solution B, a sodium tungstate solution, a precipitant and the slurry in parallel to form a gel, aging, and generating a second slurry; (3) aging the second slurry, drying, rolling and mixing with a β molecular sieve, and molding to obtain a molded product; (4) soaking the molded product in an organic acid solution of a carboxylic acid polymer and / or an organic phosphonic acid compound, desalting, and obtaining a catalyst. The catalyst prepared by the method of the invention has a large pore volume and pore size, small active metal oxide particles, excellent isomerization performance and aromatic conversion capacity, and is suitable for the hydrocracking process of producing specialty oils and lubricating oil base oils.

The invention discloses an additive for improving the octane number of propylene and gasoline, and a preparation method and application thereof, and belongs to the technical field of catalyst preparation and application. The additive for improving the octane number of propylene and gasoline comprises 20-65% of a regular ZSM-5 molecular sieve, 0-25% of other molecular sieves, 3-30% of P2O5, 3-18% of a binder and the balance of clay, totaling 100%; the regular ZSM-5 molecular sieve has a specific surface area of ​​300-510 m 2 / g, micropore volume is 0.20 ~ 0.42 mL / g, mesopore volume is 0.10 ~ 0.27 mL / g, grain size is 30 ~ 300 nm, silicon aluminum ratio is 20 ~ 180. The regular ZSM-5 molecular sieve prepared by the present invention without template agent has high yield, high crystallinity, excellent acid properties and open pore structure. The additive for improving propylene and gasoline octane number contains regular ZSM-5 molecular sieve and is modified with phosphorus compounds, which simultaneously improves catalytic activity and shape-selective cracking ability, increases the cracking ability of low-octane alkane components, greatly improves propylene yield and gasoline octane number, and effectively reduces manufacturing costs.