3181 results about "Catalytic effect" patented technology

A carbon nanocapsule supported catalysts. At least one kind of catalytic metal particle is deposited to a carbon nanocapsule, wherein the carbon nanocapsule has the following formula: F(−M)n, in which F is the carbon nanocapsule, M is the catalytic metal particle, and n is the number of the catalytic metal particle. By applying the carbon nanocapsule as a catalyst support, the catalytic behavior of the catalytic metal particle is specialized, the dispersion is improved, and the catalytic effect is enhanced.

The present invention relates to a highly active midbarrel hydrocracking catalyst and a process for the preparation thereof. The support of the catalyst comprises a modified zeolite-Y, a modified zeolite-beta, alumina, etc. The composite of the modified zeolite-Y and zeolite-beta exhibits a good synergistically catalytic effect. The catalyst prepared by supporting Group VIB and/or Group VIII metal components is useful in the hydrocacking of heavy oils with high content of sulfur and nitrogen to produce high quality middle distillates with maximum output. The activity of and selectivity to middle distillates of the catalyst are remarkably raised simultaneously. Moreover, the solidifying point of the produced diesel is remarkably lowered.

The invention relates to a set of electrocatalytic strong oxidizer materials, comprising a nano-function anode material which compounds nano oxide particles and catalyzes metal nano particles on a titanium substrate, and a nano-function cathode material which takes titanium or stainless steel as a substrate and introduces transition metal nano-particles on the surface thereof. By the electro-catalytic advanced oxidation technology, under the catalytic action of electrocatalytic strong oxidizer materials, water body can generate a hydroxyl radical with strong oxidizing performance and an oxygen radical; and if a chloride ion exists in water, hypochlorite can be generated. Under the joint action of a plurality of types of strong oxidizers, the algae cells in the water body and various harmful bacteria can be killed; and simultaneously the ammonia in water and the water-soluble organic matters can be degraded, so the goal of purifying water is achieved. According to the electrocatalytic advanced oxidation theory, the electrocatalytic strong oxidizer materials does not need to add any chemical agent when in application, does not have secondary pollution, and has good safety, high efficiency and low energy consumption.

The invention discloses a method for preparing a multi-sulfonic acid group functionalized ionic liquid. In the method, a poly-nitrogen tertiary amine reacts with a sultone to an obtain multi-sulfonic acid radical betaine, and the obtained betaine is subjected to acidification by an acid to obtain the multi-sulfonic acid group functionalized ionic liquid. The ionic liquid prepared by the invention has the characteristics of high thermal stability, high acid value, low synthesis cost and good catalytic effect, etc.

The invention discloses a preparation method of a stable superhydrophobic hot liquid coating, and belongs to the technical field of surface coating preparation. According to the preparation method, in an acetone-water mixed system, in the catalytic effect of acid or base, organic silane and nano particles carry out hydrolysis and condensation reactions to obtain organic silane polymer/nano particle compound suspension; then organic resin adhesive is added into the compound suspension, the mixture is evenly mixed and evenly sprayed on the surface of a substrate material, and finally a thermal curing treatment is performed to obtain the stable superhydrophobic hot liquid coating. The prepared coating has an excellent superhydrophobic hot liquid performance, has the advantages of good mechanical stability, chemical stability, and environmental stability, and thus has a good application prospect.

A waste gas treatment system having a burner part and a combustion chamber provided at a downstream side of the burner part. Combustion flames are formed from the burner part toward the combustion chamber, and a waste gas is introduced into the combustion flames, thereby oxidatively decomposing the waste gas. The combustion chamber is formed from an inner wall made of a fiber-reinforced ceramic material. Therefore, the wear of the inner wall due to heat and corrosion is minimized, and thermal stress cracking is also reduced. Consequently, the lifetime of the system increases, and the cost of equipment and the availability factor can be improved. In addition, because the inner wall exhibits no catalytic effect, the formation of thermal NOx is suppressed, and it is possible to achieve environmental preservation and to simplify the treatment equipment.

The invention discloses a preparation method for an iron-nitrogen co-doped porous carbon sphere material. The preparation method comprises the following steps: by taking 2-aminopyridine as a monomer and taking ammonium persulfate and ferric chloride as oxidants, performing in-situ polymerization reaction in a duct of a porous silicon dioxide template to obtain a precursor; performing high-temperature carbonization treatment on the precursor in a tubular furnace and an inert gas nitrogen-gas environment; and removing the silicon dioxide template by hydrofluoric acid to obtain the iron-nitrogen co-doped porous carbon sphere material which is taken as an electric catalyst to achieve good catalytic effect in oxygen gas reduction reaction. The preparation method has the advantages that the process is simple and easy to perform and the raw materials are cheap. The prepared carbon material contains a three-dimensional communicated pore structure, has a high specific surface area and a large pore volume, can effectively improve the electric catalytic activity through the heteroatom nitrogen-iron doping, has relatively high electric catalytic efficiency while being applied as a low-price electric catalyst, and has an important value and significance in the fields of doped type porous carbon material preparation and proton membrane fuel battery electric catalysis.

The invention discloses a method for purifying air by combining adsorption and in-situ heat catalytic oxidation regeneration. The method uses a porous material with adsorption and catalysis functions and a porous material with protective adsorption to adsorb low concentration of formaldehyde and benzene series in the air; when the adsorption of the porous material approaches to saturation, electrical heating is started to activate the catalytic activity of the porous material with the adsorption and catalysis functions, thereby catalytically oxidizing the formaldehyde and the benzene series which are adsorbed on the surface of the porous material into carbon dioxide and water; at the same time, the adsorption capability of the porous material is regenerated; the regenerated porous material is reused for adsorption; thus air purification can be realized through the circulation. The method has the advantages of high efficiency, energy conservation, low cost, no secondary pollution and so on. The method is suitable for purifying air containing the low concentration formaldehyde and the benzene series in a building, a cabin or other restricted spaces.

The invention discloses a method for synthesizing a graphene-containing composite thin film material. The method comprises: firstly, preparing a graphene oxide transparent thin film with uniform thickness by using graphene oxide colloidal suspension as a deposition medium; performing in-situ reduction on the graphene oxide thin film by an electrochemical process to obtain a graphene thin film; and finally, depositing uniformly-dispersed platinum nano particles on the surface of the obtained raphene thin film by a constant-potential depositing technique to obtain a platinum-graphene nano composite thin film. The catalytic behavior of the prepared composite thin film material on methanol is studied by using the prepared composite thin film material as an electrode. The experiment result proves that the composite thin film has remarkable catalytic effect on methanol.

The present invention relates to a new process for preparing adipic acid by air oxidating cyclohexane, cyclohexanol, cyclohexanone and cyclohexene or mixture of cyclohexanol and cyclohexanone under the catalysis of metal porphyrin. Under the condition of 1-20 atm air and reaction temp. is 50-200 deg.C it can select and use mu-oxidized metal porphyrin and monometal porphyrin or their fixed carrier material as catalyst independently, also can select and use metal porphyrin or their fixed carrier material as main catalyst, and use transition metal salt or oxide as co-catalyst. The metal porphyrin like biological-enzyme can high-effectively and high-selectivity catalyze air under the biologicae concentration to directly oxidate the cyclohexane into adipic acid. Said invented dose of metal porphyrin is less, and its catalytic effect is good, it can make homogeneous catalysis, also can make heterogeneous catalysis after the carrier is fixed.

The invention discloses a BiOI/BiOBr multilevel structure composite visible light catalyst, and a preparation method and application thereof, and belongs to the field of the water treatment of photocatalytic materials. The composite photochemical catalyst BiOI/BiOBr which has a special appearance and a high catalytic effect is prepared by a low-temperature substep precipitation method. A BiOI/BiOBr composite is compounded by two different band gap semiconductor effective bodies, the light absorption range is expanded, the separation of photon-generated carriers is accelerated, and the compounding of electron hole pairs is reduced, so that the photocatalytic activity of light materials is improved. The method is easy to operate and low in cost, and a structure and composition of a photocatalytic composite material can be controlled effectively to control the photo-electrochemical property of the photocatalytic composite material, so that the BiOI/BiOBr multilevel structure composite visible light catalyst has the significant application value on the preparation of the semiconductor composite material.

The invention provides a preparation method of an oxidation nanocellulose adsorbing material. The preparation method comprises the following steps of conducting pretreatment and then cleaning cellulose; and under the catalytic action of 2, 2, 6, 6-tetramethyl piperidine-nitrogen-oxide and sodium bromide, conducting an oxidation reaction on obtain cellulose under the action of an oxidizing agent, so that oxidation nanocellulose is obtained, wherein sodium hypochlorite serves as the oxidizing agent; mixing the nanocellulose with an organic solution containing amino high molecules, then conducting centrifugation, then mixing the mixture with a cross-linking agent, and conducting a reaction, so that the oxidation nanocellulose adsorbing material is obtained. By means of the preparation method, the specific surface area of the cellulose is increased, the contactable performance of heavy metal pollutants and adsorbent is improved, the surface of the material can have a large number of adsorption functional groups, and heavy metal ions can be aggregated to the surface of the adsorbent from a sewage system through the complexation effect and the electrostatic effect. The invention further provides the oxidation nanocellulose adsorbing material.

The invention relates to a carbon-carried multi-metal polypyrrole oxygen reduction catalyst and a preparation method thereof. The metal Co or Fe in the present carbon-carried single-metal polypyrrole oxygen reduction catalyst Co-PPy/C or Fe-PPy/C is locally substituted by one or more other metal, thereby obtaining the carbon-carried multi-metal polypyrrole oxygen reduction catalyst containing two or more metals, wherein the total weight of the metals is 0.01-30% of the weight of the catalyst, the weight of each metal is 1-99% of the total weight of the metals in the catalyst, and the weight ratio of carbon to polypyrrole in the catalyst is (1000:1)-(1:1). Compared with the prior art, the carbon-carried multi-metal polypyrrole oxygen reduction catalyst has the advantages of good catalytic effect and the like.

The invention belongs to the technical field of semiconductor oxide gas sensors, and specifically relates to an ethanol gas sensor based on a ZnO/SnO2 heterostructure composite material and a preparation method thereof. The provided ethanol gas sensor has the advantages of high sensitivity and low detection limit. A ZnO/SnO2 sensitive composite material, which is prepared by a two step hydrothermal method, is used; and the gas sensitivity on ethanol of the sensor is improved by using the heterostructure formed between SnO2 and ZnO and the synergetic catalytic effect on ethanol of SnO2 and ZnO. Moreover, in a low concentration range, the composite material has a good responding performance on ethanol gas, and even ethanol gas in the ppb level can be detected. The preparation technology of the sensor is simple, the volume of the sensor is small, and the sensor can be massively produced and has a wide application prospect in the field of ethanol content detection.

The invention belongs to the technical field of molecular sieves and particularly relates to a cubic or sheet-shaped nano SAPO-34 molecular sieve and application thereof in conversion, separation and absorption of all kinds of hydrocarbons. The dimension range of the molecular sieve is within 20-300nm and is rapidly prepared by using tetraethyl ammonium hydroxide as template agent, mixing the tetraethyl ammonium hydroxide with an aluminum source, a silicon source and a phosphorus source and adding specific solvent to control gel concentration through the traditional hydrothermal or microwave heating method. The nano-scale SAPO-34 molecular sieve synthesized by adopting the method has the characteristics that the cost of raw materials for gel is low, the production speed of the molecular sieve is rapid, the preparation time of crystallized start materials is short, the reaction energy consumption is low, the yield of the molecular sieve is high, the catalytic application life is long and the catalytic effect of the molecular sieve in catalytic reaction can be obviously improved.

The invention relates to a nanofiber fabrication method comprising nanofiber growth from a catalyst zone, furthermore comprising the following steps:

• • producing at least one micropattern (11) on the surface of a substrate (1);
  • producing a catalyst zone (50) on the surface of said micropattern;
  • nanofiber growth from the catalyst zone,

characterized in that the micropattern (11) comprises a base, at least partially convergent side walls and an upper face, said base being covered with a so-called “poison” layer (4) where no nanofiber growth catalysis effect can take place,

the so-called “poison” layer not being present on said upper face;

the base being covered with a catalyst layer (5) on the surface of the so-called “poison” layer;

the thickness of the “poison” layer and the thickness of the catalyst layer being such that the nanofibers cannot grow either on the side walls or on the base of the micropatterns constructed beforehand.

The invention discloses a precision and high-efficiency transgenic carrier as well as a construction method and application thereof. The transgenic carrier is obtained by completely assembling a genecoding CRISPR/Cas9 proteins, a DNA template of gRNAs, a homologous arm of a target gene side wing and a target gene to be transferred into a same plasmid vector. By adopting the precision and high-efficiency transgenic carrier as well as the construction method and application thereof, the workload and the subsequent hybridization for operating the gene in a laboratory can be significantly reduced, the homozygote generation time can be shortened, and the transgenic efficiency can be significantly increased. Based on an MCR method, the external target gene and the Cas9 gene are jointly transferred into silkworm genome in the process for precisely modifying the gene by virtue of the catalytic effect of the Cas9, the homozygote can be generated in a G0 generation, i.e. the mutation generatedon one copy can be automatically propagated onto an allele.

The invention discloses a method for synthesizing a composite molecular sieve by a microwave method and catalytic performance application thereof. In the method for preparing the composite molecular sieve by the microwave method, kaolin is taken as a raw material, inorganic silicate is taken as an additional silicon source, and the prepared composite molecular sieve is applied to the alkylation reaction of phenol and tertiary butanol. The method comprises the following steps of: adding a certain amount of sodium silicate into the kaolin serving as the raw material to synthesize a Y type molecular sieve precursor; and preparing a composite molecular sieve Y/MCM-41 by the microwave method by using hexadecyl trimethyl ammonium bromide serving as a template. The synthesized molecular sieve has two pore structures, namely micropores and mesopores; the specific surface area of a sample is more than 550 m<2>/g; the average pore size is roughly 2.7 nm; and the sample has a regular and ordered hexagonal pore structure. The synthesized molecular sieve has good catalytic effect on the alkylation reaction of the phenol and the tertiary butanol, and particularly the selectivity of 4-tertiary butyl phenol is up to 86.3 percent.

The invention discloses a method for preparing 5-hydroxymethylfurfural (HMF), which comprises the following steps of: mixing a biomass sugar source and an ammonium salt which can form a low eutectic mixture together with the biomass sugar source, reacting the mixture at the temperature of between 60 and 180 DEG C, and cooling the reaction product to room temperature after the reaction is finishedto obtain a target product. In order to ensure that the catalytic effect of the ammonium salt is not affected by temperature, a catalyst can be added to promote the reaction. The highest yield of themethod can reach 70 percent. The method has the advantages of high selectivity, mild condition, high reaction speed, low cost, simple process, environment friendliness, no need of catalyst, environment-friendly process and the like. The invention provides a new method for industrially producing the HMF from the biomass sugar.

The invention discloses an ozone-catalytic functional ceramic membrane, a preparation method thereof and a circulating coating device, relates to the technical field of membrane material preparation, and aims at solving the problems that the ozone-catalytic efficiency of the existing ceramic membrane is low, the integration of membrane filtration and ozone-catalytic functions cannot be realized, membrane pollution cannot be effectively relieved and the like. By using a tubular ceramic membrane as a carrier, single-component or multi-component metal oxides are loaded through an impregnation method, then manganese oxide dipping coating solution is prepared, and a catalytic coating layer is prepared on the surface of the membrane through a layer-by-layer dipping coating method. The invention aims at establishing a stereoscopic multistage catalyst system, simultaneously improving the catalytic efficiency of the separation layer and supporting layer of the ceramic membrane and enabling an ozone-catalytic effect to seep into the entire ceramic membrane to fully realize the overall catalytic effect. Compared with other metal oxides, manganese oxide has better adsorption and ozone-catalytic capacities, and while the ozone-catalytic capacity is improved, the membrane pollution is effectively relieved and the integration of multiple functions such as pollutant adsorption, ozone-catalytic oxidization and membrane separation is realized.

The invention discloses a metal fiber/molecular sieve composite material and its preparation method and application. The composite material is formed by an integral sintered metal fibrous matrix and an MFI type molecular sieve layer uniformly coated on the outer surface of the each metal fiber of the matrix, and is prepared by using a sol precoated layer and a hydrothermal crystallization growth method. The metal fiber/molecular sieve composite material possesses a three dimensional opening style continuous network structure, the void ratio can reach 68%-85%, the permeability is high, the thermal conductivity is good and the structure is stable, the composite material possesses excellent catalytic effects of catalytic reaction of methanol prepared by olefin and catalytic reaction of a cyclohexanone peroxide ammoximation fixed bed, and the invention has the advantages of simple preparation method and controllable structure, is suitable for industrial production, and has the practical value and application prospect.

The invention discloses a method for treating an organic waste gas through low-temperature plasma concerted catalysis. The treating steps are as follows: (1) pre-treating the organic waste gas to be treated, using manners of water cooling and filtering to perform cooling, dust removal and dehumidification on the organic waste gas; (2) sending the pre-treated organic waste gas into a low-temperature plasma concerted catalysis area, decomposing the organic waste gas by using low-temperature plasma concerted catalysis, and generating harmless micro-molecules; (3) sending the gas treated in the low-temperature plasma concerted catalysis area into an adsorption reaction area, and adsorbing organic molecules and high energy molecules which are not completely reacted by using an adsorbent, so as to further oxidize and decompose the organic molecules; (4) discharging the pollution-free gas after decomposing and oxidization through a discharge tower. The method has high purification efficiency on the organic waste gas, is good in effect, is less affected by various environments and external conditions, and especially has high purification efficiency on the organic waste gas with high flow, low concentration, and complex composition.

The present invention relates to an electroionic apparatus for treating an aqueous solution, including a flow cell through which the aqueous solution may flow, and a high frequency AC power source. A pair of electrodes within the flow cell are in contact with the aqueous solution and coupled to the AC power source. The AC power source generates a signal that is transmitted to the electrodes to generate an electromagnetic field and an ionic current within the aqueous solution in the flow cell. Each electrode includes a plurality of perforations defined through the plate electrode. Electrodes within the flow cell may be formed of materials having a catalytic effect upon the electroionic reactions within the flow cell.

The invention discloses a carbon-based solid acid catalyst and a preparation method thereof. The preparation method comprises the following steps: proportionally mixing carbon-containing raw materials and a chlorine-containing organic high-molecular compound, and carbonizing a mixture to obtain a black solid product; cooling and grinding the black solid product, and adding a sulfonating agent to perform sulfonating; performing cooling, filtering, washing and drying to obtain a black granular material, wherein the sulfonic group density of the black granular material is 0.1 to 5mmol/g, the chlorine content of the black granular material is 0.2 to 70mg/g, and the molar ratio of C to H to O is 1:(0.05-1.3):(0.1-1). The black granular material comprises a carbon framework and active sites, wherein aromatic carbon layer sheets which are in bridge bond connection so as to form a basic unit; the active sites are connected to the carbon layer sheets and comprise -Cl, -SO3H, -OH and -COOH. The carbon-based solid acid catalyst prepared by using the method is stable in structure, high in acidity, low in cost, good in catalytic effect, easy to recycle and wide in application prospect.