472results about How to "Not easy to inactivate" patented technology

A dealkylation and transalkylation catalyst for increasing the output of heavy (C9 or more) arylhydrocarbon contains the hydrogen-type zeolite containing SiO2/Al2O3 (20-90 Wt portions), adhesive (10-80) and palladium oxide (0.001-5).

The invention discloses an organic-inorganic hybrid mesoporous catalyst for purifying VOCs (volatile organic compounds) and a method for preparing the organic-inorganic hybrid mesoporous catalyst. SBA-15 mesoporous molecular sieves are used as carriers of the organic-inorganic hybrid mesoporous catalyst, organic groups (phenyl groups, amino groups and sulfhydryl groups) and transition metal oxide (oxide of Mn, Fe and Co) are used as active components of the organic-inorganic hybrid mesoporous catalyst, and chloride of alkali metal or alkaline-earth metal is used as an auxiliary of the organic-inorganic hybrid mesoporous catalyst. The specific surface area of the organic-inorganic hybrid mesoporous catalyst ranges from 700 m<2>/g to 900 m<2>/g, and the average pore diameter of pore passages in the organic-inorganic hybrid mesoporous catalyst ranges from 8 nm to 15 nm. The method includes supporting the organic groups on the SBA-15 molecular sieves by the aid of an in-situ solvent thermal synthesis process; modifying the SBA-15 mesoporous molecular sieves by the transition metal oxide by the aid of an impregnation process to obtain the organic-inorganic hybrid mesoporous catalyst. The organic-inorganic hybrid mesoporous catalyst and the method have the advantages that the organic-inorganic hybrid mesoporous catalyst has large mesoporous pore diameters and the large specific surface area and is high in catalytic activity, catalytic active constituents are good in dispersibility, acid centers can be reinforced, and the method is simple and feasible and is low in cost; the VOCs can be converted into harmless carbon dioxide and water under synergy of the organic-inorganic hybrid mesoporous catalyst and low-temperature plasma technologies at the normal temperature, and the organic-inorganic hybrid mesoporous catalyst has few byproducts and is difficult to inactivate.

The invention discloses a technology for catalytically treating VOCs by means of synergy between plasma and mesoporous.The technology comprises the steps that water vapor is introduced into organic waste gas subjected to dust removal by filtration, the water vapor is mixed with the organic waste gas to be uniform to form mixed gas, the mixed gas is sent to a low-temperature plasma mesoporous catalytic reactor through a fan, by means of the plasma oxidation capacity produced in the discharge process of the low-temperature plasma mesoporous catalytic reactor and adsorption and catalytic oxidation of a meoporous catalyst, VOCs gas in the mixed gas is oxidized into harmless CO2 and H2O, and harmless treatment on VOCs in the organic waste gas is completed; the mesoporous catalyst in the low-temperature plasma mesoporous catalytic reactor can be subjected to organic modification with an amino group or a phenyl group or a sulfhydryl group, and transition metals are doped for modification so as to improve the organic waste gas harmless treatment effect.According to the technology for catalytically treating the VOCs by means of the synergy between the plasma and the mesoporous, the adsorption and catalytic oxidation of the mesoporous catalyst and reinforcement of the plasma are combined together to treat volatile organic waste gas, the energy consumption is low, equipment is simple, and the cost is low.

The invention discloses a preparation method of a high-stability platinum complex catalyst and an application thereof. The catalyst comprises a high-stability platinum complex catalyst and a temperature-sensitive compound coated microcapsule platinum catalyst, the high-stability platinum complex catalyst takes a platinum complex formed by taking a siloxane compound containing unsaturated groups asa ligand as a core and an active component, or takes an organic compound containing N and P as a modification auxiliary agent; the temperature-sensitive compound coated microcapsule platinum catalysttakes the high-stability platinum complex with unsaturated group coordination or a common Karstedt catalyst as a basic core; the temperature-sensitive compound is used as a coating layer to form thecore-shell microsphere with hydrosilylation catalytic activity, the platinum catalyst and the inhibitor are less in use amount and long in normal-temperature storage time, intense catalytic dehydrogenation of hydrogen-containing silicone oil is not easy to cause, and the transportation and use safety is high.

The invention provides a composite bacillus preparation containing three strains, a preparation method of the composite bacillus preparation and application of the composite bacillus preparation to ecological breeding, and belongs to the technical field of microorganism and feed additives. Bacillus coagulans, butyric acid clostridia and bacillus megaterium are used as fermentative strains respectively, and large-scale, low-cost and high-density fermentation production of spores is conducted through step-by-step magnification; three live bacterium preparations are prepared by mixing bacterial sludge with the spores and dry starch; the three live bacterium preparations are matched according to the equal weight ratio, the composite bacillus preparation is obtained, and the concentration of the spores reaches more than 1*108-109 cfu/g; the composite bacillus preparation serves as a microorganism and feed additive to be added to farmed animal feed according to the mass ratio ranging from 0.02% to 0.5%. The composite bacillus preparation is simple and stable in process, low in cost, high in spore content and environment tolerance, easy to store and high in survival rate; the purposes of composition and synergism are achieved through the collaborative supplementary effects of different bacilli in the aspect of micro-ecology adjustment, growth of farmed animals is promoted, the feed utilization rate and feed rewards are increased, diarrhea is prevented and reduced, and the breeding ecological environment is improved.

This invention belonging to nano material technology is the synthesis of eight-amino-benzene cage model sesquialter siloxane. The previous method adopts aminic acid as hydrogen donor and Pd/C catalysis system. Our method is as followings:mix the eight-nitrobenzene cage model sesquialter siloxane, solvent and Fe/C catalysis in the weight propotion of 10:50-200:2-10,stiring in the air or nitrogen at 50- 100deg C; add 2-4 weight folds hydrazine hydrate or phenylhydrazine into eight-nitrobenzene cage model sesquialter siloxane, react for 2-12 hours; cool to ambience temperature, filter and add acetic ester for extraction, wait to layers; Get organic facies and precipitate in ligarine,obtain white sediment after separation and dry. This invention is advantageous in cheap, stable and long-term active Fe/C catalysis system, is advantageous in production efficiency.

The present invention discloses a non-supported catalyst comprising: an active metal oxide and an additive embedded in the outer surface of the active metal oxide; the active metal oxide is selected from one oxide or more oxides of iron, cobalt, nickel and copper; the additive is selected from one or more elements of iron, cobalt, nickel, copper, rhodium, manganese, potassium, silver, calcium, magnesium, zirconium, aluminum, zinc, ruthenium, platinum, sodium and phosphorus, and is in the form of an element or an oxide; the catalyst achieves the effective coordination of the supported additive and the active metal oxide, the additive can act directly on the surface of active ingredients, the promoting effect of the additive can be significantly enhanced, reducing of the active ingredients can be effectively promoted, reactivity is improved, and the catalytic properties of the catalyst can be improved. The present invention also discloses a preparation method of the non-supported catalyst.

The invention belongs to the technical field of analytical chemistry and a chemical sensor, and discloses an electrochemical sensor for diagnosis of an ovarian SKOV-3 cancer cell, relating to a preparation method of a sandwich-type immunosensor based on graphene and a DNA (deoxyribonucleic acid) marker and application of the same in medical diagnosis. Antigens (human ovarian cancer) are indirectly tested with a glassy carbon electrode modified by graphene / antibody / antigen / DNA-labeled antibody / complementary DNA through catalytic oxidation based on guanine bases and adenine bases. The high electronic conductivity of the graphene is adopted, and the cost of the antibody marker is reduced. The immunosensor prepared based on the technical scheme can also be applied in detection of other types of cells has a wide scope of application. The sensor has high sensitivity, can be prepared simply, can be applied in detection any cancer cell, and has good prospects of application in medical diagnosis.

The invention discloses a kit test method of beta-lactam antibiotics residue in milk, comprising the following steps: performing once activation to bacillus stearothermophilus, then culturing the activated bacillus stearothermophilus in a production culture medium at 50-65 DEG C for 24-36h while stirring in a rotation speed of 100-150rpm, centrifugalizing to collect bacteria mire, adding agarose bromcresol purple solution, mixing evenly to ensure the number of spore in each kit reach 1.00*10<7>-2.50*10<8>cfu, subpackaging the spore in porous reaction vessels at 60-70 DEG C, covering aluminum-plastic film, placing upside down, sealing, placing the vessels in aluminum-plastic packages and storing in dark place while keeping from wet. The kit has the advantage of easy operation, high sensibility, good repeatability, low cost and high throughput, can be stored at 4-8 DEG C for 12-18 months and can be used to test beta-lactam antibiotics residue in milk.

The invention relates to a macroporous resin catalyst for preparing alkyl carbonate, which mainly solves the problem of the prior art that the activity of the catalyst is low and is quickly reduced. Aiming at well solving the problem, the macroporous resin catalyst adopts the technical scheme that the macroporous resin catalyst is prepared by the following components in percentage by weight: (a) 10% to 20% of metal salts, and (b) 80% to 90% of diphenylphophine substituted composite microspheres. A method for preparing the diphenylphophine substituted composite microspheres comprises the following steps of (1) preparing an additive 1 into a water solution A; (2) preparing a monomer, a comonomer, a nano material, an initiator and an additive 2 into a solution B, wherein at least one of methyl methacrylate, butyl acrylate, styrene, alpha-methylstyrene, 4-butylstyrene or acrylonitrile is adopted as the monomer; (3) mixing the solution B and the solution A to obtain the microspheres; (4) adding a chloromethylation agent or zinc chloride into the microspheres to obtain composite chloride spheres; and (5) adding chlorinated diphenylphosphine and lithium metal into the composite chloride spheres to react, so as to obtain the diphenylphophine substituted composite microspheres. The macroporous resin catalyst can be used for the industrial production of the alkyl carbonate.

The invention discloses an aspergillus oryzae bacterial strain for producing feed compound enzyme with high yield and application of the aspergillus oryzae bacterial strain, and belongs to the technical field of biological fermentation. The bacterial strain for fermentation is specifically aspergillus oryzae DJ36, and is collected in the China General Microbiological Culture Collection Center with a collection number of CGMCC NO.13575. A polypeptide feed preparing process is implemented through a liquid fermentation technology in conjunction with an enzymatic hydrolysis technology, and specifically comprises the following steps: preparing a monospore bacterial suspension of the aspergillus oryzae; preparing a liquid bacterial strain; performing liquid fermentation with a triangular flask or a fermentation tank; performing enzymatic hydrolysis on impure protein with fermentation liquid; drying, smashing, packaging and the like. A functional small-molecular polypeptide is generated efficiently under the coaction of aspergillus oryzae fermentation and enzymatic hydrolysis at the later stage of fermentation, the advantages of a microbial fermentation technology and the enzymatic hydrolysis technology are combined, the use of an enzyme preparation is greatly reduced, the production cost of the polypeptide is lowered, and the industrialization process of the polypeptide is accelerated; moreover, a prepared feed additive has a relatively high nutrient value and disease resistance, and a wide application prospect.

The invention relates to virus-like particle recombinant protein of a virus variation strain VP2 gene of an infectious bursal disease, belonging to the field of biologic pharmacy. The IBDV variation strain (AH1) VP2 gene is cloned, converted and transfected to obtain a recombinant baculovirus vBac-VP2; an infected Sf9 insect cell has specific fluorescence, and the antigen valence of the infected Sf9 insect cell is above 1.6*10<3>; the molecular weight of a recombinant VP2 protein is 53kDa, and the recombinant VP2 protein is in the state of virus-like particles; an indirect ELISA detection method established for an envelope antigen by the purified recombinant VP2 protein has good specificity and sensibility; an immune chicken can resist IBDV virulent attack, and the protection ratio achieves 100 percent. The novel virus-like particle recombinant VP2 protein prepared by the IBDV variation strain VP2 gene has high pertinence on the immune prevention of a current prevalent IBDV virulent strain and good practical value and popularization prospects.

The invention relates to a method for removing alkyl nitrite and nitrous oxide from tail gas, and mainly solves the problems that an additional reducing agent is required to be added, the tail gas is difficult to reach the standard, a reduction catalyst is poor in stability and easy to deactivate, and the like in the prior art. According to the adopted technical scheme, he method comprises the following steps: (a) conveying industrial tail gas containing reducing gas into a deep freezer, cooling the tail gas to 10 DEG C below with freeze water, and recycling alkyl nitrite carried in the tail gas; (b) conveying the cooled tail gas into an absorption tower, and absorbing the alkyl nitrite in the tail gas with alkyl alcohol to obtain alkyl alcohol solution containing alkyl nitrite; and (c) conveying a gaseous discharge material from the top of the absorption tower into a reactor, reacting non-absorbed alkyl nitrite and nitrous oxide with the reducing gas in the industrial tail gas to generate nitrogen in the presence of a catalyst, so that the problems are well solved, and the method can be used for removing the alkyl nitrite and the nitrous oxide from the tail gas.

The invention relates to a method using 5-hydroxymethylfurfural to prepare 2,5-furandicarboxylic acid. The method comprises the following steps of (1) adding a catalyst carrier into an organic solvent to disperse, applying onto a quartz sheet, heating to remove the organic solvent, and using an ALD (atomic layer deposition) method to deposit a platinum source onto the catalyst carrier, so as to obtain a platinum-loaded catalyst; (2) adding the platinum-loaded catalyst obtained in step (1), 5-hydroxymethylfurfural and solvent water into a reactor, and reacting for 2 to 12h at the temperature of 20 to 100 DEG C under the oxygen atmosphere, so as to obtain the 2,5-furandicarboxylic acid. The preparation method has the advantages that the platinum-loaded catalyst is prepared by the ALD method, the good catalyzing property in a water-phase reaction system is realized, and the high-yield 2,5-furandicarboxylic acid is obtained; compared with the catalyst prepared by the traditional method, the stability is better; the water-resistant property is better, and the easiness in deactivation is avoided.

The present invention discloses a SCR denitration catalyst and a preparation method. According to the present invention, titanium tungsten silicon powder is adopted as a carrier, and the components are subjected to mixing, kneading, primary staling, filtration pre-extrusion, secondary staling, vacuum molding extrusion, primary drying, secondary drying, calcination, cutting and assembling to prepare the product, and comprise, by weight, 56.0-59.0% of titanium tungsten silicon powder, 1.0-7.0% of an auxiliary catalyst, 0.1-1.5% of ammonium metavanadate, 0.1-1.0% of lactic acid, 3.5-5.0% of ammonia water, 0.1-1.0% of monoethanolamine, 3.0-5.0% of a structure aid, 0.2-1.1% of a binder, and 28.0-31.0% of water. The SCR denitration catalyst of the present invention has effects of effective alkali metal poisoning resistance improving and deactivation resistance so as to prolong the chemical use life of the catalyst.

The invention relates to a complex biological growth promoter used for recovering river bottom sediment, which comprises the following components (by weight percent: 5 to 14 % of electrical stone, 85 to 94% of active zeolite, 0.3 to 1% of biochemical fulvic acids and 0.1 to 0.3% of CoCl2.6H2O, wherein natural electrical stone is used as the raw material of the electrical stone, and the natural electrical stone is crushed into super fine powder with the granularity of 800 to 1200 meshes; natural active zeolite is used as the raw material of the active zeolite, the natural active zeolite is firstly activated at the high temperature of 300 to 600 DEG C and then crushed into active zeolite powder with the granularity of 100 to 500 meshes; and the complex biological growth promoter used for recovering river bottom sediment can be obtained after the electrical stone, the active zeolite, the biochemical fulvic acids and the CoCl2.6H2O are dried, crushed and mixed. The invention has the characteristics of activity preservation, simple production process and low production cost and suitability for large-size application, and is not easy to lose along with water.

The invention relates to a polyaspartic acid bacterial fertilizer and a production method and application thereof. The polyaspartic acid bacterial fertilizer comprises polyaspartic acid or salts thereof, bacillus megatherium, colloid bacillus, bacillus licheniformis, bacillus subtilis, humic acid, and amino acid. The polyaspartic acid bacterial fertilizer can be used for improving the soil, helping crops to absorb nutrient elements including nitrogen, phosphorus, potassium and trace elements, promoting the growth of roots, reducing contamination to environment, activating the soil and reducing the use amount of the fertilizer.

A transalkylation catalyst for increasing the output of C8 arylhydrocarbon contains the hydrogen-type zeolite containing SiO2/Al2O3 (20-90 Wt portions), adhesive (10-80) and platinum oxide (0.001-5).