656 results about "Efficient catalyst" patented technology

The invention relates to novel carbene ligands and their incorporated monomeric and resin/polymer linked ruthenium catalysts, which are recyclable and highly active for olefin metathesis reactions. It is disclosed that significant electronic effect of different substituted 2-alkoxybenzylidene ligands on the catalytic activity and stability of corresponding carbene ruthenium complexes, some of novel ruthenium complexes in the invention can be broadly used as catalysts highly efficient for olefin metathesis reactions, particularly in ring-closing (RCM), ring-opening (ROM), ring-opening metathesis polymerization (ROMP) and cross metathesis (CM) in high yield. The invention also relates to preparation of new ruthenium complexes and the use in metathesis.

The invention provides a preparation method of a high-efficiency catalyst for synthesizing vinyl acetate by an acetylene method. The oxidant is used to oxidize the surface of activated carbon used as a catalyst carrier to change the oxygen-containing functional groups on the surface of the activated carbon and improve its original pore structure, thereby effectively improving the loading capacity of the active component zinc acetate and significantly improving the catalyst efficiency. The invention has the advantages of cheap and easy-to-obtain raw materials, simple operation, high loading capacity of catalyst active components, good activity and long service life.

The invention relates to a biomass magnetic carbon material for degrading organic dye. The material is prepared by mixing a biological raw material and an iron precursor at a ratio of (2-20kg):1kg. Meanwhile, the invention also discloses a preparation method of the biomass magnetic carbon material. The biomass magnetic carbon material provided by the invention is cheap and efficient and has double effects of adsorption catalysis and degradation; serving as an efficient catalyst in a process of constructing a Fenton-like system for treating high-concentration wastewater, the biomass magnetic carbon material has high catalytic activity in thoroughly oxidizing and degrading organic dye; the degradation effect is better than that of a ferrous ion homogeneous catalysis reaction and a Fenton-like reaction taking ferroferric oxide as a catalyst.

The invention discloses application of a nitrogen-doped porous carbon fixed Co@Pt nano-particle composite material, prepared by taking ZIF-67 as a template, as an efficient catalyst for oxygen reduction catalytic reaction of a cathode of a fuel cell. The application has the superiorities that (1) a synthetic method of the catalyst is simple and feasible, the shape of the catalyst is controllable, batch preparation can be realized, and the catalytic performance is very stable; (2) the oxygen reduction catalytic reaction of nitrogen-doped porous carbon fixed cobalt-platinum core-shell nano-particles in the cathode of the fuel cell shows that the nano-particles have good catalytic activity and excellent methanol poisoning resistance stability, and compared with traditional commercial Pt/C, the nano-particles have relatively high take-off potentials and half-wave-peak potentials (nano-particles: 0.99V and 0.87V, and Pt/C: 0.98V and 0.83V); and (3) metal organic frameworks (MOFs) for preparing the catalyst have sequential microcellular structures and relatively large specific surface areas and can be widely applied to the storage and conversion of energy sources. Therefore, a method for simply and directly preparing cheap and efficient cathode oxygen reduction electro-catalyst is provided for the fuel cell and has a wide application prospect.

The present invention provides a preparation method of supermacroporous polymer microsphere and its product. It is characterized by that said preparation method includes the following steps: adding high-content surfactant into oil phase containing monomer, making the oil phase containing monomer and surfactant be dispersed in water phase, making the above-mentioned material undergo the process of suspension polymerization so as to obtain supermacroporous microsphere. The grain size of said microsphere is 1-200 micrometers, and its porosity is 10%-90%.

The invention relates to a preparation method of an antibacterial silver molybdate graphite phase carbon nitride composite visible light catalyst, comprising the following steps: preparation of lamellar graphite phase carbon nitride and graphite phase carbon nitride doped silver molybdate composite photocatalyst preparation. The beneficial effects of the present invention are: the preparation method is relatively simple, and the preparation conditions are easy to control; the prepared silver molybdate-doped graphite-phase carbon nitride composite photocatalyst is a green and environmentally friendly high-efficiency catalyst, has excellent antibacterial properties, and has no Secondary pollution, high catalytic efficiency, etc., have practical application value.

This invention relates to a chelated calcium fertilizer, which is prepared from: catalyst 1-2 wt. %, inorganic calcium raw material 58-69 wt. %, and chelating agent 30-40 wt. %. The chelating agent is composed of: oxalic acid 5-10 wt.%, malic acid 8-20 wt.%, citric acid 15-25 wt.%, maleic acid 10-25 wt.%, sorbitol 3-8 wt.%, gallic acid 8-10 wt.%, and lactic acid 2-8 wt.%. The catalyst is composed of: gadolinium chloride 0.1-0.35 wt.%, selenium dioxide 0.1-0.2 wt.%, chalcanthite 0.05-0.1 wt.%, KOH 0.05-0.1 wt.%, potash 0.1-0.2 wt.%, and palladium carbonate 0.05-0.2 wt.%. The chelating agent has appropriate stability and low cost, and can chelate with calcium in solid state. Besides, the chelating agent cannot be deactivated in plants by hydrolysis or reacting with phosphate, sulfate and oxalic acid. This invention also relates to a method for preparing the chelated calcium fertilizer, which specifies the production process, process parameters, and chelating agent and high-efficiency catalyst needed.

A high-effective catalyst used for removing indoor formaldehyde at normal temperature includes a carrier, a noble active component, and an additive. The carrier is a mesoporous oxide including at least one of Al2O3, TiO2, SiO2, cerium oxide, cobalt oxide and manganese oxide; the active component includes a less amount of at least one of noble metals Pd, Pt, Au and Ag; the additive is at least one of Na, K, Fe, Co, Ce and Ni. The catalyst can completely convert the formaldehyde into CO2 and H2O at normal temperature under relative humidity of 50-90%. The catalyst has high catalytic-oxidizing activity and strong anti-moisture capability and is suitable for removal of the formaldehyde in a sealed or a semi-sealed space.

The invention relates to a method for preparing colorless hydrogenated rosin ester resin. Rosin ester obtained by esterifying rosin purified through distillation is used as a raw material, catalytic hydrogenation is carried out under the action of a solvent and a high activity catalyst, the solvent is separated through distillation, and the colorless hydrogenated rosin ester resin is obtained. The product comprises the following key indexes of: no more than 100 of Hasson color number, no more than 20 mg/g of acid value, 80 to 110 DEG C of softening point and 0 to 15 gI2/100g of iodine value. The product can substitute a colorless hydrogenated petroleum resin product to be applied to the high-end adhesive. The method for preparing the colorless hydrogenated rosin ester resin is simple and easy, and the prepared product has the advantages of shadow color, lower iodine value, higher stability and lower preparation cost when being compared with the traditional products.

The invention relates to a high-efficiency catalyst for oxidizing low-concentration formaldehyde in indoor air into carbon dioxide and water at room temperature and normal humidity and a preparation method of the catalyst. The catalyst is characterized in that: cordierite honeycomb ceramic coated with TiO2-SnO2 composite oxide is taken as a carrier, and 0 to 5 percent of Pt is taken as an active ingredient. The catalyst has the advantages that: energy such as light, heat, electricity and the like and a chemical reagent are not required to be added, the formaldehyde removing efficiency is far higher than that of a photocatalysis technology and a plasma technology under the conditions of large air quantity, high humidity and the like, byproducts are not generated, and the catalyst is suitable for efficiently removing formaldehyde in closed or semi-closed spaces such as artificial board production workshops, living rooms, automobiles and the like.

The invention discloses a preparation method of glycolide. According to the preparation method, high purified glycolic acid crystal is taken as a raw material, and high-purity high-yield glycolide crystal can be synthetized through a series of steps such as dehydration polycondensation, melt phase polycondensation, depolymerization reaction and recrystallization purification. Glycolic acid oligomer is generated through glycolic acid polycondensation, and almost all the glycolic acid oligomers are depolymerized for preparing the glycolide under the action of a high efficient catalyst, the usage amount of the catalyst is low, the preparation technology is simple, the yield is high and the preparation method has industrial production potential.

The present invention relates to a field of control of nitrogen oxide pollution, and involves a high-efficient catalyst for denitration at low temperature and preparation method thereof, which comprises the steps: (1) preparing aqueous solution of cerium nitrate; (2) soaking mesoporous silica materials SBA-15 with aqueous solution from step (1), after stirring, filtrating, washing and drying; (3) calcining materials from step (2) to obtain evenly dispersed CeO₂-SBA-15 materials; (4) preparing ethanol solution of manganese nitrate; (5) soaking CeO₂-SBA-15 materials from step (3) with ethanol solution of manganese nitrate from step (4) and volatilizing ethanol, washing and drying; (6) calcining materials from step (5) to obtain evenly distributed Mn_xO_y/CeO₂-SBA-15 catalyst for denitration; The preparation method has simple process with lower cost, and the obtained Mn_xO_y/CeO₂-SBA-15 catalyst has uniform and ordered pores, large specific area, narrow pore size distribution, well dispersity of catalytic components, high catalytic activity, better effect of denitration at low temperature range and wider temperature range available for denitration.

The invention discloses a high efficiency catalyst used for compounding dioctyl phthalate which comprises titanium metal compounds, tin metal compounds, and other metal compounds; among which, the titanium metal compounds are titanic acid four phenyl ester, titanic acid four ethyl ester, silicic acid four alkane ester modified titanate or compound silicon dioxide carrier titanate; the tin metal compounds are stannous oxide, stannous oxalate, acetate diethyl tin, or dibutyl didodectyl acid tin; other metal compounds are ethylene glycol antimony, sodium aluminate, aluminum oxide, aluminum hydrous oxide plus sodium hydroxide, manganese oxide, cobalt oxide, antimony trioxide or zinc oxide. The catalyst used for compounding dioctyl phthalate of the invention has the advantages of improving reaction speed (Reaction time is improved within 3 hours from more than 8 hours in original technology), having a thorough esterification, and improving the quality of the product.

The invention provides a halogen-free flame retardant organosilane self-crosslinked polyolefin cable material which comprises a material A, a material B and a material C, wherein the weight ratio of the material A to the material B to the material C is (80-85):(3-5):(10-17); the material A is prepared from polyolefin resin, a plasticizer, a halogen-free flame retardant, saturated fatty acid, a cross-linking agent, an initiator and an antioxidant; the material B is prepared from polyolefin resin, a high-performance catalyst, an antioxidant, a metal ion inhibitor, a metal oxide and a material B processing additive; the material C is prepared from polyolefin resin, a halogen-free flame retardant, a coupling agent and an antioxidant. The invention further discloses a preparation method of the halogen-free flame retardant organosilane self-crosslinked polyolefin cable material. The halogen-free flame retardant organosilane self-crosslinked polyolefin cable material is environment-friendly, has favorable flame retardance, heat resistance, ageing resistance and processability, is simple in preparation process and low in energy consumption, and has relatively good economic benefits.

The invention discloses a simple preparation method of benzothiazole salt ionic liquid and application thereof to organic catalytic synthesis. In the invention, the benzothiazole salt ionic liquid has a novel structure, benzothiazole N-alkyl quaternary ammonium salt is used as cations (alkyl is one of n-C4H9, n-C5H11 and n- C6H13), BF4<-> or PF6<-> is used as anions. In the preparation method, benzothiazole, chloralkane, alkyl bromide and alkali metal salt or ammonium salt which contains the target anions react in one step under a solvent-free condition. In the invention, the one-step method is used for preparing the benzothiazole salt ionic liquid, therefore, the preparation yield is greatly increased, the use of substrates with high toxicity and high price is avoided, the consumption of organic solvents is reduced, the excessive use of a certain reaction component is avoided, the preparation process is simplified and high product yield is ensured. Therefore, the method has god economy and environmental friendliness and is suitable for mass preparation. The benzothiazole salt ionic liquid can be used as a mild, exclusive and efficient catalyst in benzoin condensation and Biginelli condensation and can be recycled and reused many times.

This invention discloses a method for preparing surface-modified microspheres containing phosphazene, whose chemical structure in shown in this invention. The diameters of the microspheres are 0.3-2.0 mu.m, and the specific surface areas are 10-30 m2/g. The method comprises: condensing hexachlorocyclotriphosphazene and 4, 4'-dihydroxy diphenyl sulfone in the presence of an acid binding agent to obtain crosslinked microspheres. The method is simple, and suitable for mass production. The obtained microspheres can be used in controlled release of drugs, high-efficiency catalyst carriers, novel electric materials, novel optical materials, and flame retardant materials.

The invention relates to a VOCs normal temperature degradation high efficiency catalyst, and a preparation method and applications thereof. According to the preparation method, a silicon aluminum composite oxide with a plurality of porous structures is taken as a carrier; active component MnO2 is dispersed on the surface of the porous silicon aluminum composite oxide carrier at a high dispersion degree, and MnO2 surface is loaded with a metal oxide auxiliary agent. Compared with the prior art, the advantages are that: the silicon aluminum composite oxide carrier possesses a plurality of porousstructures, effective absorption of VOCs molecules of different kinds and different sizes can be realized; highly dispersed active component MnO2 is capable of catalyzing ozone oxidation of VOCs molecules absorbed in pores and channels of the carrier, and the synergistic effect of the metal oxide auxiliary agent with the active component MnO2 is capable of promoting VOCs deep degradation into CO2and H2O, generation of by-product is reduced, effective degradation of residue ozone is realized at the same time, secondary pollution is avoided, at normal temperature, high VOCs desorption activityand high CO2 selectivity are achieved, no secondary pollution is caused, service life is long, the preparation method is simple, cost is low, the using conditions are mild, and potential industrial application value is achieved.

The present invention belongs to the field of high-molecular material, in particular, it relates to a polymethylethylene-cyclohexylene carbonic ester material and its preparation method. Said invention adopts carbon dioxide, epoxy propane and epoxy cyclohexane, under the action of high-effective catalyst load zinc binary carboxylate to synthesize degradable plastic polymethylethylene-cyclohexylene carbonic ester. The epoxy cyclohexane has rigid lexatomic ring, can be used as third monomer and added into copolymerization reaction of epoxy propane and carbon dioxide. Said invention utilizes the regulation of epoxy cyclohexane content in the reaction so as to obtain the ternary copolymer on whose main chain the different cyclohexylene contents can be contained. Said ternary copolymer has high mechanical strength and thermal property.