64results about How to "Synergistic catalytic effect is good" patented technology

A carrier of hydrocatalyst for the hydrocracking of heavy oil, hydromodifying of poor diesel oil, etc is prepared from amorphour silicon aluminium, modified beta-molecular sieve and aluminium oxide. Its preparing process is also disclosed. Said catalyst has high catalytic activity.

The invention discloses modified cyanate ester resin and a preparation method of the modified cyanate ester resin. The preparation method of the modified cyanate ester resin comprises the steps that by mass, 100 parts of molten cyanate ester resin and 0.503-4.167 parts of oxidized graphene-manganese-based metal organic framework hybrid body are evenly mixed, and the modified cyanate ester resin is obtained after curing. The oxidized graphene-manganese-based metal organic framework hybrid body is a hybrid material which is composed of oxidized graphene and a manganese-based metal organic framework, and the manganese-based metal organic framework is composed of manganous ions and an organic ligand through coordination bond. Compared with cyanate ester resin, the modified cyanate ester resin prepared with the method is lower in dielectric constant, lower in dielectric loss and better in fire resistance. The preparation method of the modified cyanate ester resin has the advantages that the technique is simple, cost is low, and the range of sources of raw materials is wide.

The invention discloses a preparation method of a Cu-Co catalyst for the preparation of ethanol by synthetic gas. The method comprises the following steps: firstly synthesizing a single Cu2(OH)2CO3 orCo2(OH)2CO3 phase by using a homogeneous precipitation method, then preparing a single (Cu, Co)2(OH)2CO3 precursor phase with mutual atomic level dispersion through Co<2+>/Cu<2+> ion exchange and finally forming the Cu-Co catalyst with uniform Cu-Co dispersion, single surface structure and stronger synergistic effect by using a microwave radiation treatment precursor.

The invention discloses a method for synergistically degrading organic dye wastewater by a graphene electrode and a photoelectric Feton. Firstly, graphite and variable-valence metal oxides are mixed, and emulsifiers, absolute ethanol and polytetrafluoroethylene are sequentially added thereto, and ultrasonic action makes it Disperse evenly until it is mixed to form a cohesive paste; then roll the obtained paste into a film, attach it to a nickel mesh, press it into an electrode under a certain pressure, and remove the residue on the electrode surface; the soaked electrode The graphite composite electrode is placed in an infrared box and dried to obtain a graphite composite electrode; the graphite composite electrode is used as a cathode, and the iron sheet is used as an anode, and the lighting device is turned on to irradiate the electrolytic cell with sunlight to degrade the organic dye wastewater. The invention adds sunlight to the electro-Fenton reaction to form a photo-electric Fenton system, which is applied to the dye wastewater treatment practice, and the method improves the degradation ability of the dye wastewater.

The invention discloses a hydrocracking catalyst as well as a preparation method and application thereof. The catalyst comprises a carrier, an active component and silicon dioxide formed by loading silane and then roasting, wherein the carrier contains a Y molecular sieve and an SAPO-34 molecular sieve; the active component comprises a VIB group metal and a VIII group metal, and the weight contentof silicon dioxide formed by roasting after loading silane in the catalyst is 0.5 wt%-5wt%. The preparation method of the hydrocracking catalyst comprises the following steps: (1) uniformly mixing materials containing a Y molecular sieve and an SAPO-34 molecular sieve, adding the mixture into an acidic solution, molding, drying and roasting to obtain a carrier; and (2) introducing active components into the carrier prepared in the step (1), the active components being VIB group and VIII group metals, and drying and roasting after introduction to obtain the hydrocracking catalyst. The catalystis used for well matching reaction activity and medium oil selectivity in a hydrocracking reaction process, and has excellent product properties.

The invention discloses a molybdenum and molybdenum-vanadium co-doped nano silicon oxide based catalyst, a preparation method and the application thereof, and belongs to the technical field of heterogeneous catalysis. By taking mesoporous nano SiO2 particles as a carrier and molybdenum or molybdenum-vanadium as an active ingredient, the catalyst is synthesized in one step through an in-situ method. Molybdenum oxygen and molybdenum-vanadium oxygen species are doped to enter into a mesoporous nano SiO2 particle skeleton, the molar ratio of Mo to Si is 0.01 to 15: 100, and the molar ratio of V, Mo to Si is 0.5-1.5 to 0.5-1.5: 100. The invention also provides a preparation method of the catalyst and the application of the catalyst in oxygen-containing compounds such as olefin and acrolein produced through selective oxidation of propane. The molybdenum and molybdenum-vanadium co-doped nano silicon oxide based catalyst is rapidly synthesized by adopting a simple and efficient one-step emulsion synthesis method and using cheap raw materials, the catalyst is used into the selective oxidation reaction of propane, and the selectivity of the target products such as olefins and total aldehydescan reach 73.4%.

The invention relates to the field of organic chemistry and discloses a preparation method of ethyltriethoxysilane. The preparation method solves the problem that the existing ethyltriethoxysilane preparation method utilizes a high-toxicity benzene solvent as a reaction medium so that environmental pollution is large; a reaction equipment investment is high; and an industrial production cost is high. The preparation method comprises the following steps that triethoxysilane, a catalyst and a cocatalyst are added into a pressure-resistant reactor, then are heated to a temperature of 15 to 90 DEG C with stirring, and then are added with ethylene; the mixture undergoes a reaction until the pressure in the reactor is not reduced after ethylene feeding is stopped, so that a ethyltriethoxysilane synthesis product is obtained; and the ethyltriethoxysilane synthesis product is separated and purified to form ethyltriethoxysilane. The preparation method does not utilize an additional solvent, adopts simple equipment and processes, utilizes a small amount of a catalyst, reduces a cost, improves a synthesis yield and reaction selectivity, and realizes easy separation of a desired product ethyltriethoxysilane.

The invention relates to a 1,2,3-triazole functionalized N-heterocyclic carbene binuclear nickel compound and a preparation method thereof and belongs to the field of organometallic chemistry. According to the 1,2,3-triazole functionalized N-heterocyclic carbene binuclear nickel compound, 1,2,3-triazole functionalized N-heterocyclic carbene is taken as a ligand, and the mole ratio of N-heterocyclic carbene to nickel is 1 to 1; the 1,2,3-triazole functionalized N-heterocyclic carbene binuclear nickel compound has a molecular structural formula shown in specification, wherein R1 is imidazole or benzimidazole, R2 is one of benzyl, n-butyl and phenyl, and X is either PF6 or BF4. The preparation method of the 1,2,3-triazole functionalized N-heterocyclic carbene binuclear nickel compound is simple, the binuclear nickel carbene compound is stable to air and moisture, and the distance among nickel atoms is relatively short, so that the compound has a metal-metal effect; by using the catalyst, cross-coupling reaction can be efficiently realized, and a variety of biphenyl derivatives can be obtained in the yield of being higher than 90%; the compound has very good functional group compatibility, is environment-friendly and can be extensively applied to fine chemical industry and pharmaceutical industry.

The invention discloses a preparation method of a sodium chlorate generator electrode. The preparation method comprises the following steps of (1) matrix treatment, (2) preparation of inner-layer active coating liquid, (3) preparation of inner-layer metal oxide, (4) preparation of outer-layer active coating liquid, and (5) preparation of the electrode. According to the novel preparation method of the sodium hypochlorite generator electrode, the prepared electrode has the advantages of being low in chlorine evolution potential, high in oxygen evolution potential, energy-saving, environmentally friendly, long in service life and high in electrolytic efficiency.

The invention discloses a hydrocracking catalyst carrier as well as a preparation method and application thereof. The carrier contains a Y molecular sieve and an SAPO-34 molecular sieve, based on thecarrier, the weight content of the Y molecular sieve is 2-35wt%, and the content of the SAPO-34 molecular sieve is 2-25wt%. The preparation method of the carrier comprises the following steps: uniformly mixing materials containing a Y molecular sieve and an SAPO-34 molecular sieve, adding an acidic solution, molding, drying, and roasting to obtain the hydrocracking catalyst carrier. A catalyst prepared from the carrier has high reaction activity, medium oil selectivity and excellent product properties in the hydrocracking reaction process.

The invention relates to the technical field of sewage purification and particularly relates to a graphene sewage purification combined device and a sewage purification method thereof. The graphene sewage purification combined device comprises a reactor, an ultrasonic wave generating device and a membrane separator, wherein a catalyst and multiple layers of graphene are arranged in the reactor. The sewage purification method comprises the following steps of: a) putting the multiple layers of graphene and the catalyst into the reactor, inputting sewage into the reactor, and enabling air to enter the bottom of the reactor; b) generating ultrasonic waves by the ultrasonic wave generating device, stripping the multiple layers of graphene to form single-layer graphene by the ultrasonic waves, and decomposing pollutants in the sewage through the single-layer graphene and the catalyst; c) enabling a water body after treatment in the step b) to enter the membrane separator; and d) discharging the water body from the membrane separator. According to the sewage purification method disclosed by the invention, various types of liquid can be treated continuously or intermittently, and the purposes of fast decomposition of the pollutants, disinfection and sterilization are realized.

The invention discloses a preparing method for an air-permeable chlorine-evolution electrode. The preparing method comprises the following steps of (1) base body treatment, (2) precursor deposition bath preparing, (3) deposited layer preparing, (4) thin film middle layer preparing, (5) active solution preparing, and (6) sintering. The preparing method for the air-permeable chlorine-evolution electrode of a novel sodium hypochlorite generator is low in chlorine evolution potential, long in service life, high in electrolytic efficiency and low in operating cost.

The invention relates to preparation of propylene carbonate, particularly to a preparation method of propylene carbonate. The preparation method of propylene carbonate comprises the following steps: (1) based on carbon dioxide and epoxypropane as raw materials, adding epoxypropane and 0.3-3.0mol% of catalytic amounts of zinc fluoride and potassium iodide to a reaction kettle, and keeping the reaction kettle in a sealing state, wherein the weight ratio of zinc fluoride to potassium iodide is (1.8-2.2): (0.8-1.2); (2) filling 1.8-2.0MPa of excessive carbon dioxide, and performing reaction for 8-11h at 90-160 DEG C; (3) putting the reaction kettle to ice-water bath, and stopping reacting. The preparation method of propylene carbonate has the following advantages: 1) because zinc fluoride and potassium iodide are used as catalysts and the weight proportion is reasonable, a good synergic catalysis effect is achieved and the yield is more than 97%; and 2) the reaction pressure is 2.0MPa at most and the reaction temperature is 160 DEG C at most, so that the reaction condition is mild, the method is easy to realize and the cost can be saved.

The present invention provides one-section hydrogenation process for producing food level white oil. By using vacuum gas oil, deasphalted solvent oil and Fischer-Tropsch process oil as material, and hydrogenating catalyst containing modified beta-molecular sieve in 1-9 wt%, and through hydrocracking inside a hydrocracking co-current reactor to obtain reaction product, hydrorefining in a countercurrent hydrorefining reactor with flash region to exhaust gas and liquid hydrocarbon, the reverse contact reaction between the downward flowing liquid hydrocarbon and the bottom entering newly formed hydrogen in the bed layer with reduction type hydrogenating catalyst, and final gas-liquid separation and product distillation, food level white oil is produced. The process is simple and has high product quality.

The invention belongs to the technical field of air pollution treatment technologies and environment-friendly catalyst materials, and particularly relates to a copper-iron bimetal loaded monolithic denitration catalyst, and a preparation method and an application thereof. Copper and iron bimetals in the obtained copper-iron bimetal loaded monolithic denitration catalyst have good synergistic catalysis effects, so that the denitration activity of the catalyst is improved, and the sulfur-ammonium salt poisoning resistance and the alkali (earth) metal poisoning resistance of the catalyst are improved. The denitration efficiency of the obtained catalyst at 250-540 DEG C is 85% or above, and the catalyst has good application prospects in the denitration direction of a moving source and the denitration direction of a fixed source.

The invention relates to a catalyst with double wrapping structures and a preparation method and application of the catalyst. The specific surface area of the catalyst is 320-490m2/g; and the catalystcomprises 60-80 parts of spinel, 5-20 parts of a manganese oxide and 10-30 parts of a carbon-contained material by weight. The surface of the spinel type catalyst is wrapped in the manganese oxide, so that the catalytic activity of the spinel catalyst is improved; and then the bulk phase is wrapped in the carbon-contained material to improve the conductivity and achieve good concerted catalysis effect.

The invention discloses a carrier of a hydrocracking catalyst, the hydrocracking catalyst and a preparation method of the carrier and the hydrocracking catalyst. The carrier comprises an Al-SBA-15 molecular sieve, a Y molecular sieve and aluminum oxide, wherein in the hydrocracking catalyst carrier, the weight content of the Al-SBA-15 molecular sieve is 2%-40%. According to a preparation method of the Al-SBA-15 mesoporous molecular sieve, amorphous silica-alumina dry glue is used as a raw material, and a P123 triblock copolymer is used as a template agent to synthesize the Al-SBA-15 mesoporous molecular sieve. The hydrocracking catalyst prepared by adopting the carrier is excellent in comprehensive performance, and has the characteristics of high potential aromatic content of heavy naphtha, high cetane number of diesel oil, low BMCI value of tail oil and the like when being used in a hydrocracking reaction process.