110results about How to "Increase lytic activity" patented technology

A catalyst for purifying the exhaust gases of diesel engines, which catalyst contains at least one zeolite and, additionally, at least one of the support oxides aluminum oxide, silicon dioxide, titanium dioxide and aluminum silicate and at least one of the noble metals platinum, palladium, rhodium and iridium. In this catalyst the atoms of the noble metals have a mean oxidation number of less than +2.5, on average more than 3 metal ligands and less than 3 oxygen ligands and are present on the zeolites and support oxides in the form of crystallites having a mean particle size of from 1 to 6 nm.

The invention relates to electronic silver paste and a preparation process thereof, belonging to the technical field of production of such base materials as electronic ceramic components, thick film hybrid circuits, touch components and the like. The electronic silver paste is prepared by mixing and stirring 4-9% of glass powder, 63-80% of silver powder, 12-28% of organic carrier and 0.2-2% of additive, rolling, dispersing and grinding the mixture, then adding 1-2wt% of bismuth stearate, stirring the mixture uniformly and filtering the mixture with a screen. The electronic silver paste and the preparation process have the following beneficial effects: the glass powder system does not contain lead; the minimum grain size and shape of the silver powder are not strictly required; and the silver paste is especially suitable for the positive electrodes of the solar cells on the crystalline silicon solar cell silicon substrates produced in large batch and has excellent electrical property and mechanical property..

The present invention relates to propylene producing catalytically cracking process, and is especially propylene producing process with catalytically cracking aluminum silicophosphate. In fixed bed or fluidized bed reactor and at the conditions of temperature 350-550 deg.c, pressure 0.1-0.3 MPa and space velocity 0.1-300 / hr, dry gas, C4 component and other material are cracked in catalyst containing aluminum silicophosphate molecular sieve SAPO-34. The output hydrocarbon mixture is separated to obtain destination product propylene before the other components are returned to the reactor for circular use. The process of the present invention has low reaction temperature, pressure near normal pressure, simple technological process and high propylene selectivity. The present invention can utilizes dry gas and C4 component effectively.

The invention relates to a nano-composite molecular sieve and a preparing method thereof. Silica sol and sodium metaaluminate are taken as silicon source and aluminum source respectively, and step-by-step synthesis of crystallization is adopted by utilizing surfactant hexadecyl trimethyl ammonium bromide (CATB) and tetraethyl ammonium hydroxide (TEAOH) used for synthesizing a porous Beta molecular sieve as a template agent; in the first step of crystallization, an additive is added for controlling the solvent of the silicon source and the aluminum source to synthesize nano Beta latex; low-temperature dynamic crystallization is adopted in the second step; at the temperature of 30 to 40 DEG C, a composite molecular sieve is synthesized; finally a Beta / MCM-41nano-composite molecular sieve with grain size being 50 to 100 nanometers is produced after the processing steps of filtering, washing, drying and roasting.

The present invention relates to face-beautifying preparation with the functions of removing facial chloasma, whitening facial skin and removing facial wrinkles. Said face-beautifying preparation contains 6 ingredients of rose extract, Chinese angelica root extract, carthamus flower extract, grape seed extract, vitamin C and vitamin E. Besides, said invention also provides its preparation method.

The present invention provides a cracking catalyst, containing a rare-earth Y-zeolite and a support, which is characterized in that the rare-earth content in crystal lattice of the rare-earth Y-zeolite is 4-15 wt % of RE2O3; the original unit cell size is 2.440-2.465 nm; the equilibrium unit cell size of the catalyst after 100% stream-aging at 800° C. for 17 hours is larger than 2.435 nm; the rare-earth atom content in the support is 1.0-8.0 wt % of the support. The present invention also relates to a preparation process for the same catalyst.

The invention relates to a doping type solar cell front silver paste. The composition and weight percentage of the paste is 75% to 90% of silver powder, 1% to 8% of glass powder, 1.5% to 4% of organic binder, 0.1 % to 10% of compound containing indium and zinc, 0% to 1% of dispersing agent, and a solvent as a surplus, wherein the glass powder is la, boron, and zinc glass system, the compound containing indium and zinc is A(Zn(CH3(CH2)16COO)2), and A comprises the element In. According to the doping type solar cell front silver paste, since the la, boron, and zinc glass system glass powder is employed, the compound containing indium and zinc is added at the same time, the bonding strength between an electrode and a silicon substrate is strengthened, and the series resistance and sheet resistance are reduced. At the same time, in the compound containing indium and zinc, a zinc component is hard zinc stearate, the effect of surface tension of a contact interface between the compound containing indium and zinc and the organic binder and the solvent, and the electric performance of the electrode is more uniform.

The invention discloses a light oil type hydrocracking catalyst and a preparation method thereof. The method is characterized by taking amorphous silicon aluminum and modified Y zeolite as carriers, taking group VIB and group VIII metal as hydrogenation components, and taking group IVB metal as an auxiliary agent, wherein according to the weight percentage of the catalyst, the amorphous silicon aluminum accounts for 10 to 20%, the modified Y zeolite accounts for 40 to 65%, group VIB metal oxide accounts for 10 to 20%, group VIII metal oxide accounts for 1 to 10%, and group IVB metal oxide accounts for 1 to 10%, the surface area of the catalyst BET is 350 to 650m<2> / g, the pore volume is 0.35 to 0.6ml / g, and pores with a size of 10 to 20nm account for 5% to 15% of the total pore volume. The preparation method of the catalyst adopts a mixing kneading method or sol method. The catalyst is highly adaptable to the raw materials, has relatively high cracking activity and hydrogenation activity, and is suitable for a one-stage series process for producing naphtha as a main target product.

The invention discloses a catalyst for pyrolysis of oil shale. The catalyst is prepared from the following raw materials by weight percentage: 2-8% of a molecular sieve, 1-5% of activated clay, 10-60% of organic cobaltate, 5-20% of metal sulfide, 8-30% of glycerate, and 15-35% of paraffin; the organic cobaltate is one or more of cobalt acetate, cobalt oxalate, cobalt naphthenate and cobalt neocaprate; the metal sulfide is molybdenum sulfide and / or nickel sulfide. The invention further discloses a preparation method of the catalyst and a use method of the catalyst. According to the catalyst disclosed by the invention, the pyrolysis efficiency of the oil shale can be improved, the distribution of pyrolysis products of the oil shale is improved, more light products are produced, and components of gasoline and diesel oil can be separated through rectification. According to the preparation method and use method of the catalyst, which are disclosed by the invention, the catalytic pyrolysis and microwave heating are combined, so that the utilization efficiency of energy source can be improved, the composition and process performance of liquid fuel are improved, and the following processing difficulty is reduced.

A method for producing a catalyst for catalytic cracking of a hydrocarbon oil easily produces a catalyst for catalytic cracking of a hydrocarbon oil that exhibits high cracking activity with respect to a heavy hydrocarbon oil, and can produce a gasoline fraction having a high octane number in high yield. The method includes preparing an aqueous slurry that includes 20 to 50 mass % of a zeolite having a sodalite cage structure, 10 to 30 mass % (on a SiO2 basis) of a silica sol, 0.1 to 21 mass % (on an Al2O3.P2O5 basis) of mono aluminum phosphate, and 5 to 65 mass % of a clay mineral on a solid basis, aging the aqueous slurry for 5 to 200 minutes, and spray-drying the aqueous slurry.

A magnesium modified Y-type molecular sieve has a rare earth oxide content of about 4% to about 11% by weight, a magnesium oxide content of about 0.1% to about 4% by weight, a sodium oxide content of about 0.3% to about 0.8% by weight, a total pore volume of about 0.33 mL / g to about 0.39 mL / g, a percentage of the pore volume of secondary pores having a pore size of 2-100 nm to the total pore volume of the modified Y-type molecular sieve of about 10% to about 30%, a lattice constant of about 2.440 nm to about 2.455 nm, a percentage of non-framework aluminum content to the total aluminum content of the modified Y-type molecular sieve of no more than about 20%, and a lattice collapse temperature of not lower than about 1045° C.

The invention discloses a rhodium reduction activation dissolution method, and relates to the technical field of noble metal metallurgy. The rhodium reduction activation dissolution method can be used for overcoming the defects of the prior art and aims at achieving a rhodium dissolution method which has the advantages of high dissolution efficiency, wet method normal-pressure dissolution, easiness for operation, short process flow, low production cost and wide rhodium waste dissolution range. The technical scheme is as follows: the rhodium reduction activation dissolution method comprises the following steps of: A, crushing and grinding rhodium wastes; B, mixing with an activating agent; C, carrying out acid-soluble activation; D, filtering; and E, dissolving. According to the invention, because zinc powder and a hydrochloric acid solution generate chemical reaction in the step C to generate H2, rhodium oxide contained in the solution can be reduced into metal rhodium through H2 at 100 DEG C, the dissolution activity of rhodium can not be reduced and can be enhanced so as to be favorable to subsequent dissolution, and the rhodium oxide is reduced into the metal rhodium without being dissolved by hydrochloric acid in the activated process. Thus, the rhodium reduction activation dissolution method disclosed by the invention has the advantages of high rhodium dissolution efficiency, rhodium normal-pressure dissolution, low dissolution temperature, easiness for operation, short process flow, low production cost and wide rhodium waste dissolution range.

The invention discloses a genetically engineered lysin with a function of killing staphylococcus and a preparation method. According to the preparation method, a lysin LysGH15 is subjected to genetically engineered modification to obtain a novel bacteriophage lysin LysGH15(+). The bacteriophage lysin LysGH15(+) shows stronger bactericidal activity and wider host spectrum, in comparison with a lysin before modification, can kill staphylococcus aureus, staphylococcus epidermidis, staphylococcus haemolyticus, staphylococcus hominis, staphylococcus saprophyticus, staphylococcus cohnii, fermented staphylococcus xylosus and the like, provides a potential novel medicine to prevention and treatment of diseases caused by staphylococcal infection, and has a good application value.

The invention provides a dinuclear macrocyclic polyamine metal complex. It is uses as hydrolyst, able to effectively cut DNA and RNA on physiological condition at low concentration (the minimum value 5mu mol / L) in short time (hydrolyzing time about 30 minutes), it has good cutting reaction selectivity, no notch ringlike DNA and RNA occurring, and its cutting mode is also similar to restriction endonuclease's.

The invention discloses a preparation method for a catalyst used in production of isobutene through cracking of methyl tert-butyl ether (MTBE). According to the method, aluminum hydroxide colloid and Silicalite-1 molecular sieve crystallization liquid are mixed and molded and then undergo hydro-thermal treatment, and a resultant is used as the catalyst; preferably, the catalyst is loaded with a proper amount of active metal components; and the catalyst is used for cracking of MTBE for production of isobutene. The catalyst prepared in the invention has good catalysis performance, enables good selectivity on methanol and isobutene and a high conversion rate of MTBE to be obtained and inhibits generation of dimethyl ether, a reaction by-product.

The invention relates to a method for preparing a bdellovibrio preparation by an enrichment culture method, belongs to the field of biotechnology and relates to an enrichment culture method of variousbdellovibrio, host bacteria culture and production methods of biological preparations thereof. The method is characterized in that a bdellovibrio system naturally formed in aquaculture water culturedby the enrichment culture method is used as a source of the bdellovibrio of the biological preparation, and pathogenic vibrio in the aquaculture water is purified, cultured, centrifuged, inactivatedand then used as a source of the host bacteria for the production of the bdellovibrio preparation to produce the biological preparation containing various bdellovibrio. The bdellovibrio preparation produced by the method has the advantages of high activity, rapid action and broad cleavage of pathogenic bacteria in the water due to the various bdellovibrio.

Ethanol losses due to bacterial contamination in fermentation cultures weakens the economics of biofuel production. Lactobacillus species are the predominant contaminant. Bacteriophage lytic enzymes are peptidoglycan hydrolases which degrade Gram positive cell walls when exposed externally and are a novel source of antimicrobials. The streptococcal phage λSA2 endolysin construct demonstrated strong lytic activity towards 17 of 22 strains of lactobacilli, staphylococci or streptococci maintaining optimal specific activity under fermentation conditions toward L. fermentum substrates. Lactobacillus bacteriophage endolysin constructs LysA, LysA2 and LysgaY showed exolytic activity towards ˜60% of the lactobacilli tested including four L. fermentum isolates from fuel ethanol fermentations. Presence of ethanol (≦5%) did not affect lytic activity. Lysins were able to reduce both L. fermentum and L. reuteri contaminants in mock fermentations of corn fiber hydrolysates. Recombinant LysA and λSa2 expressed in the yeast Saccharomyces cerevisiae are functional; LysA was shown to reduce lactobacilli in experimentally infected fermentations.

The present invention provides a cracking catalyst, containing a rare-earth Y-zeolite and a support, which is characterized in that the rare-earth content in crystal lattice of the rare-earth Y-zeolite is 4-15 wt % of RE2O3; the original unit cell size is 2.440-2.465 nm; the equilibrium unit cell size of the catalyst after 100% steam-aging treatment at 800° C. for 17 hours is larger than 2.435 nm; the rare-earth atom content in the support is 1.0-8.0 wt % of the support. The present invention also relates to a preparation process for the same catalyst.

The invention discloses a one-stage tandem hydrocracking method, which comprises the following steps that (1) a wax oil raw material and hydrogen are mixed, and the mixture enters a hydrofining reactor and is subjected to a desulfurization, denitrification and aromatic hydrocarbon saturation reaction; (2) the effluent obtained in the step (1) enters a hydrocracking reactor, wherein the hydrocracking reactor comprises first to nth catalyst bed layers along a material direction, n is greater than or equal to 3, and various catalyst bed layers are filled with hydrocracking catalysts with different contents of modified Y molecular sieves; and (3) the effluent of the hydrocracking reactor is subjected to gas-liquid separation, and the liquid phase is fractionated to obtain naphtha, aviation kerosene and diesel oil products. According to the invention, wax oil is used as a raw material, the yield of heavy naphtha with high aromatic potential is increased and the quality of aviation keroseneand diesel oil products is improved by setting a reasonable catalyst grading mode and modulating the catalyst composition and the catalyst structure in grading bed layers.

The invention discloses a carbon-based phosphate fertilizer. The carbon-based phosphate fertilizer is a mixed fertilizer comprising biochar, a phosphate fertilizer, a bacteriostat and a synergist. The carbon-based phosphate fertilizer can improve the dissolubility of a nutritive element phosphorus in soil, improve a phosphorus utilization rate, reduce a fixation rate of a nutritive element phosphorus, activate dissolution activity of fixed phosphorus in soil, improve a utilization rate of a nutritive element phosphorus and a crop absorption and utilization rate, reduce a fertilizer investment cost, improve the total amount of phosphate solubilizing bacteria in soil, improve the activity of phosphate solubilizing bacteria, convert fixed phosphorus in soil into a soluble nutrient phosphorus which can be directly absorbed and utilized by crops, prevent soil hardening caused by utilization of a single conventional phosphate fertilizer, improve a soil loosening degree, delay soil hardening, improve a soil aggregate structure, reduce soil unit weight, improve biological activity of soil, improve the soil environment, increase a fat-storage and water-retention capacity of soil, supply trace elements which are needed by crops applied with a single phosphorus element, guarantee nutrient absorption balance of crops, and realize a yield increasing effect.

The invention discloses a high-lysis klebsiella pneumoniae bacteriophage RKP-KP-20007 and application thereof, the host of the high-lysis klebsiella pneumoniae bacteriophage RKP-KP-20007 is klebsiella pneumoniae, observation through an electron microscope shows that the head of the bacteriophage is an eicosahedron and is in stereo symmetry, the length of the head is 72.640 nm, the length of the tail of the bacteriophage is 177.797 nm, the bacteriophage is a long-tail bacteriophage family with the tail, and the preservation number is CGMCC No. 22495. The Klebsiella pneumoniae bacteriophage RKP-KP-20007 has a strong cracking effect on Klebsiella pneumoniae in a poultry breeding environment, can be used for efficiently treating Klebsiella pneumoniae diseases caused by pathogenic bacteria in poultry breeding, and can be used as a disinfectant. A bacteriophage source is provided for industrial, large-scale and programmed production of bacteriophages and treatment of poultry breeding bacterial diseases caused by klebsiella pneumoniae.

The present invention relates to a Salmonella bacteriophage, in particular to a Siphoviridae bacteriophage with a wide host spectrum and a strong lytic activity against Salmonella pullorum. The above-mentioned Salmonella pullorum bacteriophage is named SP4, and is deposited at the China General Microbiological Culture Collection Center, the deposit date is Jul. 27, 2017 and the deposit number is CGMCC No, 14332, The bacteriophage has a strong lysis effect on Salmonella, and the bacteriophage can also reduce the mortality rate of chicks infected with Salmonella pullorum, The preparation can be used alone or as a cocktail, and provides a safe, non-toxic and side-effect-free and residual effect-free bacteriophage product for the treatment of the infections caused by Salmonella of chicken origin, Salmonella of duck origin, Salmonella of mink origin, Salmonella of food origin and Salmonella of pig origin.

The invention relates to an ointment paste for treating wind cold and cough; particularly, the ointment paste is composed of a drug paste and ointment, wherein the drug paste is structurally composed of an adhesive, an ointment placing ring and a protective paste; the ointment is formed from garlic, ephedra, radix stemonae, asarum, borneol and honey in a combined manner; the ointment is placed in the ointment placing ring; the protective paste and the adhesive are compounded; the whole adhesive and the ointment placing ring are completely covered and sealed; and therefore, the finished ointment paste is formed. By implementing the ointment paste disclosed by the invention, various medicinal materials have obvious treatment effects to wind cold and cough symptoms; after several medicinal materials are combined, the treatment effect is more manifest; simultaneously, medicines cannot be taken by using the ointment paste disclosed by the invention; the treatment purpose can be achieved only by directly sticking the ointment on acupuncture points of human bodies; the ointment disclosed by the invention is not only simple in formula but also simple to prepare; the prepared ointment paste is low in cost and convenient to carry and can be used by both young and old; and both the application prospect and the market prospect are very good.

The invention discloses a preparation method for a catalyst used in production of isobutene through cracking of methyl tert-butyl ether (MTBE). According to the method, silica gel, alumina gel and Silicalite-1 molecular sieve crystallization liquid are mixed and molded and then undergo hydro-thermal treatment, and a resultant is used as the catalyst; preferably, the catalyst is loaded with a proper amount of active metal components; and the catalyst is used for cracking of MTBE for production of isobutene. The catalyst prepared in the invention has good catalysis performance, enables good selectivity on methanol and isobutene and a high conversion rate of MTBE to be obtained and inhibits generation of dimethyl ether, a reaction by-product.

The desulfurization catalyst for catalytic cracked gasoline according to the present invention has high performance in removal of sulfur compounds in gasoline fractions. This catalyst contains particulate vanadium oxide having the average particle diameter in the range from 0.1 to 10 μm at the content in the range from 0.3 to 3 weight % calculated as that of V2O5. The porous spherical particles of inorganic oxide are made of crystalline aluminosilicate zeolite and a porous inorganic oxide matrix, and furthermore contain antimony.

The invention discloses a fruit and vegetable herbal beverage. The fruit and vegetable herbal beverage is characterized by comprising the following raw materials in parts by weight: 30-50 parts of lemons, 20-30 parts of big gingers, 15-20 parts of cider vinegar, 1-10 parts of fructo-oligosaccharide, 1-10 parts of fructo-oligosaccharide, 1-5 parts of green tea powder, 1-5 parts of black soybean powder, 10-15 parts of kiwi fruit juice, 2-6 parts of onions, 5-10 parts of cabbages, 5-10 parts of herring slices, 8-12 parts of undaria pinnitafida, 10-20 parts of garlic and 5-12 parts of corn. Compared with prior art, the fruit and vegetable herbal beverage of the invention has the functions of decreasing blood fat, reducing blood viscosity, scattering thrombus, expelling toxin, improving varicose veins, improving cardio-cerebrovascular health, promoting blood circulation; the fruit and vegetable herbal beverage has the functions of improving weak limbs, numb and cold hands and feet, pale and yellow face; the fruit and vegetable herbal beverage also has the functions of relieving constipation, killing internal harmful fungi, keeping colds away, warming stomach and beautifying.

The invention discloses a meat-type duck feed without antibiotic addition. The meat-type duck feed without antibiotic addition comprises the following ingredients in parts by weight: 20-70 parts of corns, 10-60 parts of bean meal, 1-50 parts of wheat bran, 1-10 parts of fish meal, 1-10 parts of alpha-ketoglutaric acid, 1-10 parts of garlicin, 1-8 parts of calcium carbonate, 1-8 parts of calcium hydrogen phosphate, 0-5 parts of DL-methionine, 0-5 parts of lysine, 0-5 parts of table salt, 0-5 parts of choline chloride, 0-5 parts of baking soda and 0-5 parts of pre-mixed materials. The meat-type duck feed is a safe and pollution-free green antibiotic-free feed which is capable of improving meat qualities of the meat-type ducks.