61results about How to "Inhibition of catalysis" patented technology

The invention relates to a mini-type test evaluation device for integral SCR denitration catalyst reaction performance test and an application method thereof, and belongs to the technical field of catalysis. A flow control instrument and a temperature control instrument control the temperature of a reaction gas sample introduction control device and a heating furnace of a preheating-reacting device; all component gases and water vapor passing through the reaction gas sample introduction control device are converged into a gas mixing device; simulated flue gas getting out of the gas mixing device enters a gas preheating pipe of the preheating-reacting device, the simulated glue gas getting out of the gas preheating pipe enters a catalyst filling pipe of the preheating-reacting device and passes through a catalyst bed layer; the gas passing through the inlet of the gas preheating pipe of the preheating-reacting device and the gas passing through the outlet of the catalyst filling pipe are led into a flue gas composition analyzing system through a sampler. The operation temperature of the device is high, and the measured activity of the catalyst is relatively low but closer to the real value; the barrier in the heat transmitting process and the thermal loss in the process are reduced, and energy saving is facilitated; the time for achieving balance of the device is shortened.

The invention discloses alkane foaming B1-grade flame-retardant polyurethane rigid foam and a preparation method thereof. Alkane is adopted as a foaming agent, polyether/polyester polyol with a specific flame-retardant effect, a catalyst, a foam stabilizer, a flame retardant, other special assistants and the like are matched to prepare combined polyether, and the combined polyether reacts with polyisocyanate to generate high-index PIR foam. The B1 flame-retardant polyurethane rigid foam disclosed by the invention is mainly suitable for a continuous line production process, and has the advantages of high flame retardance, environmental protection, low density, high production tolerance, excellent foam performance and the like compared with other types of PIR plate foam.

The invention relates to a method for restraining and delaying the thermal oxidation coking and deposition of an aviation fuel RP-3 in an air-oil heat exchanger pipe and on a metal wall face of an aero-engine. In the method, a metal surface is pretreated and passivated, so that the catalytic activity of the surface to coking is reduced, the coking of the entire heat exchanger is reduced, the service life of the entire heat exchanger is prolonged, reliability is enhanced and maintenance cost is lowered. The pretreatment comprises the steps of performing acid-washing passivation and electrolytic polishing on the metal surface.

The invention relates to an energy-saving fuel oil composition. The composition consists of the following materials in part by weight: 5 to 70 parts of petroleum byproduct heavy residual oil, 24 to 93.9 parts of light fuel oil, 1 to 5 parts of emulsifying agent, 0.1 to 2 parts of coupling agent and 1*10<-6> to 5*10<-6> part of metal passivator, wherein the light fuel oil is shale oil or low-temperature coal tar; the emulsifying agent is one or a combination of two of Span-80 and alkylphenol polyoxyethylene ether NP-4; the coupling agent is ethanol, glycerol or butanol; and the metal passivator is N,N'-bis(salicylidene) propanediamine. The energy-saving fuel oil composition has the advantages of thermodynamic stability, difficult separation of heavy fuel oil component, high storage stability, high fuel oil combustion heat value efficiency, obvious reduction in harmful gas emission and no corrosion on a combustion machine and an oil line.

The invention discloses a polyester polycondensation catalyst, a preparation method and application thereof. The preparation method comprises the following steps that: 1) a titanium-containing compound is hydrolyzed in water and/or an alcoholic solution to obtain a TiO2 sol, a silicon-containing compound is hydrolyzed in the water and/or the alcoholic solution to obtain a SiO2 sol, and the two sols are mixed evenly to obtain a TiO2/SiO2 sol; and 2) the TiO2/SiO2 sol and a nitrogen-containing or phosphorus-containing compound react to obtain a target product. The method for preparing the polyester polycondensation catalyst has simple and convenient process, is easy to operate, regulates and controls the activity of a catalytic center Ti through the coordination effect of the nitrogen-containing or phosphorus-containing compound with high thermal stability, remarkably reduces the using amount of the Ti, and fully inhibits the catalysis effect of the catalyst on a condensation side reaction and the thermal degradation of polyester. The catalyst does not need to add a toner during the use, has high catalytic efficiency, and can be used for catalyzing the polymerization of aromatic and aliphatic polyesters; and the using amount of the catalyst is greatly reduced and is about 0.0003 to 0.05 percent of the theoretical yield of the polyesters.

The invention provides a pantoprazole sodium freeze-dried medicinal composition for injection, comprising the following components by weight: 1 part of pantoprazole sodium and 0.01-0.1 part of sodium citrate. The invention also provides a preparation method of the freeze-dried medicinal composition. The pantoprazole sodium freeze-dried medicinal composition for injection is used for treating peptic ulcer bleeding, acute gastric mucosal injury caused by non-steroidal anti-inflammatory drugs and ulcer hemorrhoea in a stress state, as well as regurgitation of gastric juice and aspiration pneumonia of patients who are subjected to general anesthesia or a major operation and are weak and in coma.

The invention provides an epoxy resin conductive adhesive film including a base film and an epoxy resin conductive adhesive layer composited on the base film. The epoxy resin conductive adhesive layeris prepared from a mixture consisting of the following components by the mass fraction: 30-50% of a silver-plated copper powder, 2-4% of an ion trapping agent, 20-30 % of epoxy resin, 25-35% of butadiene-acrylonitrile rubber with active groups, and 1-3% of a curing agent. The reactive activity is reduced by trapping metal ions instead of adding active diluents, and the reaction of active group butadiene-acrylonitrile rubber with epoxy resin is catalyzed by the metal ions, a block structure is formed, and eventually, the conductive adhesive film with higher peeling strength and higher heat resistance is obtained. Experimental results show that the peeing strength of the epoxy resin conductive adhesive film is 0.65 N/mm, and the conductive adhesive film can withstand thermal shock for 30 sat the temperature of 300 DEG C. The invention also provides a preparation method of the epoxy resin conductive adhesive film.

The invention discloses high-performance fully-synthetic wind power gear oil. The wind power gear oil comprises base oil and additives, wherein the base oil is polyol ester, and the additives comprisean antioxidant, a demulsifying agent, a pour point depressant, an antirust agent, an extreme-pressure anti-wear agent, a detergent dispersant, a defoaming agent and a metal deactivator. The inventionalso provides a preparation method of the wind power gear oil. The preparation method comprises the following steps: carrying out an esterification reaction on polyol monoester and fatty acid to synthesize polyol ester, blending the polyol ester to obtain the base oil, adding the additives into the base oil, and conducting mixing to obtain the environment-friendly fully-synthetic wind power gearoil. According to the invention, the wind power gear oil has good compatibility with various additives and can be widely applied to a wind power gear oil tank; the gear oil has very long service lifeeven under severe working conditions; the high viscosity index and good shear stability of the gear oil are guaranteed; the lubricating requirement of a gear box used in a very wide viscosity range ismet; pitting corrosion can be effectively avoided or inhibited; and normal operation of a large heavy-duty mechanical gear transmission device is guaranteed.

The present invention relates to a catalyst for preparing methylene diphenyl carbamate (MDN) by using carbanilic acid ester and methylenation reagent through one-step condensation reaction, specially it is used for synthesizing 4, 4í»-methylene diphenyl carbamate. Said catalyst uses inorganic acid as catalyst and inorganic salt as cocatalyst. The production rate of methylene diphenyl carbamate can be up to 91%, its selectivity is 96%. After the reaction is completed, it is filtered, washed and separated, the MDC product can be made.

The invention discloses a self-stabilizing polyvinyl chloride resin preparation method, wherein the self-stabilizing polyvinyl chloride resin is prepared from the following production raw materials byweight: 100-200 parts of deionized water, 100 parts of vinyl chloride, 0.006-0.02 part of a dispersing agent, 0.008-0.015 part of an initiator, 0.008-0.03 part of a heat stabilizer, 0.002-0.01 part of an antioxidant, 0.003-0.01 part of a pH regulator and 0.008-0.02 part of a terminating agent, wherein the heat stabilizer is an epoxy compound stabilizer. According to the invention, the epoxy compound heat stabilizer is added during the preparation of the polyvinyl chloride resin, wherein the epoxy compound heat stabilizer as the auxiliary stabilizer only has the common stabilizing effect, thesteric hindrance of the epoxy group of the heat stabilizer is large, and under the synergistic effect of the epoxy compound heat stabilizer, the antioxidant, the terminating agent and the like added during the preparation of the polyvinyl chloride resin, HCl released by the degradation of PVC is effectively absorbed, the catalytic effect of HCl to the degradation of PVC is inhibited, the decomposition reaction of the polyvinyl chloride resin in the forming processing process is effectively prevented, and the excellent thermal stability effect is achieved.

The invention discloses whitening and freckle-removing cream and a preparation method. The whitening and freckle-removing cream is prepared from the components in parts by weight: 30-60 parts of water, 1-5 parts of radix notoginseng extract, 1-5 parts of fructus cnidii extract, 2-5 parts of egg yolk oil, 1-5 parts of radix salviae miltiorrhizae extract, 0.1-1 part of oligopeptide-1, 1-5 parts of palmitoyl pentapeptide-5, 0.1-2 parts of oligopeptide-6, 0.1-0.5 part of ceramide, 0.01-1 part of glabridin, 0.1-3 parts of 4-n-butyl resorcinol, 1-8 parts of tranexamic acid, 0.2-1 part of a preservative, 2-5 parts of nicotinamide, 1-5 parts of an emulsifier, 1-2 parts of silicone elastomers, 5-10 parts of fats and oils, 8-10 parts of glycerin, 5-8 parts of butanediol, and 0.05-0.5 part of a thickener. The whitening and freckle-removing cream has the functions of moisturizing, polypeptide repairing and promoting blood circulation and removing stasis and removing heat, dryness and dampness of avariety of plant extracts, so that the efficacy function of a whole system is remarkable.

The invention discloses an MOFs type molecularly imprinted polymer, a preparation method thereof and a pesticide residue fluorescence detection method, and relates to the technical field of pesticidedetection. According to the method, MOFs are used as functional carriers; double-template imprinting polymerization is carried out on the surface of the metal organic framework to obtain a metal organic framework/molecularly imprinted polymer (MOFs type molecularly imprinted polymer Fe3O4-MIL-Fe-coated MIPs); the product has the advantages of adjustable pore diameter and high specific surface area; the characteristics of surface molecular imprinting rapid adsorption and high selective recognition are also realized; catalase catalysis and bionic recognition characteristics can be combined; based on the relative linear relationship between the concentration Log value of the neonicotinoid pesticide residue and the fluorescence intensity of the solution, a fluorescence rapid detection method for the neonicotinoid pesticide residue based on MOFs type molecular imprinting is constructed, so that fluorescence rapid detection of the pesticide residue is realized, and the detection efficiency is effectively improved.

The invention provides a whitening essence and a preparation method thereof, and belongs to the field of cosmetics. The essence is prepared from a Boerhavia diffusa root extract, a glycyrrhiza glabraroot extract, nicotinamide, tranexamic acid, glycerol, xanthan gum, panthenol, biosaccharide gum-1 and deionized water; in the implementation process, the Boerhavia diffusa root extract, the glycyrrhiza glabra root extract, nicotinamide and tranexamic acid are used as effective components, and the weight ratio of the Boerhavia diffusa root extract to the glycyrrhiza glabra root extract to nicotinamide to tranexamic acid is controlled to be 1: 1-2.25: 1-2: 0.4-0.8, so that the whitening effect of the essence can be improved on the basis that the stability of the essence is met and the better effect of inhibiting tyrosinase at low concentration can be ensured; the skin tolerance can be improved by controlling the weight ratio of panthenol to biosaccharide gum-1 to be 1: 1-6, so that effective components in the essence can be absorbed to a greater extent.

The invention provides a carrying utensil for firing, so disposed that upon firing a ceramic electric container which possesses titanium component, the contact part between the carrying utensil and the ceramic electric container or the proximity there of will not generate chemical reaction, and what's more, no color changing, heat bonding, or decreasing properties due to changes of components will arise to the ceramic electric container. The carrying utensil employed in the firing of ceramic electric container which possesses titanium component comprises a surface layer of zirconate on its surface of basic materials, wherein the titanium component on the surface is quantified on titanium oxide, that is within 0 and 0.1 quantity percent.

The invention relates to an atmospheric aerosol smoke system for simulating open burning of biomass and measuring number concentration of particulate matters. The system comprises a burning device forsimulating the open burning of the biomass, an aerosol smoke box for simulating a process of discharging atmospheric pollutants into the atmosphere, and a particular matter particle size measuring device, which are connected in sequence; the atmospheric aerosol smoke system has three functions at the same time, and stimulates the process of discharging the atmospheric pollutants in the open burning of the biomass accurately and really; the physical and chemical reactions of the atmospheric pollutants generated in open burning of crop straws at all heights of the troposphere and even the stratosphere can be simulated in an artificially controllable and repeatable manner, and meanwhile, the influence of complex weather, terrains and other factors in the actual environment is eliminated; andthe number concentrations of atmospheric particulate matters with different particle sizes discharged in the open burning of the biomass can be accurately reflected.

The invention discloses a CQDs/P photocatalysis composite material. The CQDs/P photocatalysis composite material consists of flaky red phosphor and CQDs, wherein the red phosphor is of a mesoporous structure; the CQDs are distributed at the surface of the red phosphor; the red phosphor exists in a monoclinic phase form. The CQDs/P photocatalysis composite material has the advantages that during visible light photocatalysis reaction, the compounding of electrons and cavities can be effectively inhibited, and the visible light photocatalysis efficiency of the catalyst is obviously improved.

The invention belongs to the field of daily chemicals, and relates to a skin whitening, brightening and repairing facial mask. The skin whitening, brightening and repairing facial mask comprises a facial mask cloth and facial mask liquid immersed on the facial mask cloth, wherein the facial mask liquid contains water, glycerine, sodium hyaluronate, transparent xanthan gum, sclerotium gum, allantoin, methyl ester, tranexamic acid, erythrite, a whitening agent, water-soluble azone, tetrandrine, a viscosity-reducing agent, a preservative, a hydrating agent, propylene glycol, composite biologicalenzymes, essence and a solubilizer. The skin whitening, brightening and repairing facial mask disclosed by the invention can clean and soothe skin, replenish water comprehensively and densely for theskin, keep moist for a long time, brighten skin color, whiten and compact the skin, lighten freckles, dispel wrinkles, moisten and nourish the skin, enhance skin immunity, kill bacteria and diminish inflammation, has high repairing capacity, can repair skin tissue functions, and can quickly repair damaged skin being sensitive, sun-burn, rough, dim and dark. After the skin whitening, brightening and repairing facial mask is used, the skin is moistening, white, delicate and lucidus.

The invention discloses a method for effectively inhibiting enzymatic degradation of beauty polypeptide. Tranexamic acid and 4MSK are added into a solution containing the beauty polypeptide, and the adding molar ratio of the tranexamic acid and the 4MSK is 1:1. According to the method, the enzymatic degradation of bioactive polypeptide is inhibited, the degradation of polypeptide is effectively reduced, the complete structure and the bioactivity of the polypeptide are retained, and the expected effects of the bioactive polypeptide in the field of cosmetics efficacy are achieved.