48results about "Physical/chemical process catalysts" patented technology

The invention discloses a method for preparing antithrombotic medicament apixaban. The method comprises the following steps of: obtaining a compound V by performing an amidation-cyclization two-step one-pot reaction on paranitroaniline serving as a raw material and a general purpose reagent 5-chlorine valeryl chloride under an alkaline condition; performing di-chlorination on the alpha-hydrogen of the V by using phosphorus pentachloride; performing a condensation-elimination reaction with excess morpholine to obtain a compound VI; reducing the VI into a compound VII by using sodium sulfide; performing the amidation-cyclization two-step one-pot reaction on the VII and the 5-chlorine valeryl chloride to obtain a key intermediate III; obtaining II by performing a [3+2] cyclization-elimination reaction on the III and another intermediate IV; and finally, obtaining I by performing aminolysis on the II. The method has the advantages that: process design is reasonable, expensive reagent is not used, reaction yield is high, raw material cost is low, and the method is simple and convenient to operate, has no harsh reaction condition, and is easy to perform large-scale production.

The present invention relates to a method and apparatus for intensifying the energy content of an organic material by converting the material into hydrocarbons and the resulting product thereof. A method for converting an organic material into hydrocarbon fuels is disclosed. The method comprising the steps of pressurising said organic material being in a fluid to a pressure above 225 bar, heating said organic material in said fluid to a temperature above 200 C in the presence of a homogeneous catalyst comprising a compound of at least one element of group IA of the periodic table of elements. The disclosed method further comprises the steps of contacting said organic material in said fluid with a heterogeneous catalyst comprising a compound of at least one element of group IVB of the periodic table and/or alpha-alumina assuring that said fluid has initially a pH value of above 7.

The invention discloses a preparation method of a graphite type carbon nitride photocatalytic material, belonging to the field of the material preparation and photocatalytic technology. The graphite type carbon nitride photocatalytic material takes dicyandiamide and barbituric acid as co-precursors, adopts lithium chloride and potassium chloride as heating mediums, and is prepared in protective atmosphere through directly burning. The prepared g-C3N4 has excellent visible light absorption ability and the laminated structure characteristics, and has the degradation efficiency up to 83.8% to rhodamine B within 90min under visible light. The preparation method is simple, the raw materials are easily available, the visible light catalytic efficiency is high, and the graphite type carbon nitride photocatalytic material has wide application prospect in the photocatalytic field.

The present invention provides a photocatalyst composite structure and a preparation method thereof. The photocatalyst composite structure has backbone-branch structural feature; the graphite type carbon nitride (g-C3N4) is the backbone, and carbon nanotubes(CNTs) grown in situ on the backbone chemical through vapor deposition (CVD) are the branches; and the nano photocatalyst coats on the entire backbone-branch complex structure surface. The invention has the advantages that the photocatalyst composite structure can degrade organic contaminants and realize photocatalytic water decomposition for hydrogen production under ultraviolet and visible light; in addition, the backbone-branch composite structure has large specific surface area, and can fully contact with organic pollutants and electrolyte solution to improve the photocatalytic efficiency.

The invention provides a cobalt sulfide material, a preparation method and application of the cobalt sulfide material. The cobalt sulfide material is prepared by the following steps: (1) mixing dimethyl aminodithioformic acid with cobalt chloride hexahydrate according to a mole ratio of 2 to 1 in water for reaction, thus obtaining a first product; (2) under the protection of inert gas, carrying out reaction on the dried first product at 500 to 900 DEG C for 2 to 3 hours, thus obtaining the cobalt sulfide material. The cobalt sulfide material provided by the invention can be applied to the field of hydrogen production from water through electro-catalysis.

Disclosed is a pyrolysis reaction process. The process can be advantageously accomplished using a pyrolysis reactor that has a primary reaction zone comprised of bed packing having multiple passages through the bed packing and a secondary reaction zone having an open flow arrangement. The process includes a step of injecting a pyrolysis feed comprising a first hydrocarbon into the primary reaction zone to produce a primary pyrolysis product containing unsaturated hydrocarbon. A reactive feed comprising a second hydrocarbon is injected into the secondary reaction zone to mix with the primary pyrolysis product and produce a secondary pyrolysis product.

Belonging to the technical field of catalysts for oxidation of benzene to maleic anhydride, the invention in particular relates to a catalyst for oxidation of benzene to maleic anhydride, a preparation method and application thereof. The catalyst for oxidation of benzene to maleic anhydride provided by the invention still has high conversion rate and maleic anhydride mass yield under the conditionof a low molten salt temperature. The catalyst with high activity and low molten salt service temperature provided by the invention can save a large amount of electrical power energy, and has a positive promoting effect on the maintenance and service life of the reaction device. Moreover, due to the high activity of the catalyst, the way of diluting the catalyst bed layer with a carrier can alsobe employed to reduce the catalyst consumption, thus further reducing the cost of enterprises.

A method for preparing bio-diesel by using reverse micelle catalyst is specifically suitable for the resource utilization of various waste oil such as tailings of oil plants, cooking oil, waste oil, soapstock, swill oil and so on to directly transform waste oil into the increasingly demanded diesel substitute, i.e. bio-diesel, in a reverse micelle catalysis system. The reverse micelle catalyst is composed of surfactant, water and alcohol at a proper ratio. The method comprises the following steps: adding sulfuric acid in the waste oil, introducing steam, boiling, washing with water, and separating to obtain an acidified oil layer; and adding a reverse micelle catalyst at an amount of 0.5 to 10% that of the oil and alcohol at an amount of 10 to 50% that of the acidified oil slowly, stirring at a speed of 1,500 to 3,000 rpm to form a reverse micelle catalysis reaction system, heating and reflowing for 3 to 10 h, washing with water, standing to obtain crude bio-diesel, and distilling at 200 to 250 DEG C and under 0.001 to 0.0001MPa to obtain the pure bio-diesel with a total yield above 75%. The method has the advantages of simple and reliable process flow, high production efficiency, low energy consumption and less waste water discharge.

The invention relates to the technical field of nano photocatalytic material preparation and hydrogen production application thereof, and in particular relates to a silver sulfide/tungsten trioxide-based z-type photocatalytic material as well as a preparation method and application thereof, the silver sulfide/tungsten trioxide-based z-type photocatalytic material has a zero-dimensional/one-dimensional composite structure, the zero-dimensional structure is silver sulfide nano-particles, the one-dimensional structure is a tungsten trioxide nanorod, and the silver sulfide nano-particles are dispersed on the surface of the tungsten trioxide nanorod. WO3 and Ag2s are respectively provided with one-dimensional and zero-dimensional structures, and the migration path of photogenerated charges canbe shortened, so that the photogenerated charges are rapidly transferred to the surface of the material, and the composite probability of photogenerated carriers in a material body phase is reduced; the photogenerated charge transfer mode between Ag2SNPs and WO3NRs follows a z-type photo-catalytic charge transfer mechanism, while the photogenerated charge oxidation reduction capability is maintained, the separation efficiency of the photongenerated carriers is further improved, and the silver sulfide/tungsten trioxide-based z-type photocatalytic material has better performance of photocatalytic water decomposition for hydrogen production.

The invention discloses a bifunctional adsorbent of N-TiO2 silkworm-excrement porous carbon and a preparation method of the bifunctional adsorbent of the N-TiO2 silkworm-excrement porous carbon. The preparation method comprises the following steps: (1) firstly mixing and putting silkworm excrement and ZnCl2 in a high-temperature tube furnace, introducing a protective gas to purge, then heating to 300 to 700 DEG C to obtain silkworm-excrement porous carbon (SPC) through reaction; (2) adding butyl titanate to a selective alcohol solvent, drop by drop adding to an aqueous suspension containing the silkworm-excrement porous carbon, enabling the butyl titanate hydrolyzed to generate amorphous TiO2, thus obtaining an A-TiO2/silkworm-excrement porous carbon material; (3) carrying out surface modification on the material through a plasma radiation way to obtain an N doped A-TiO2 silkworm-excrement porous carbon material; (4) calcining the material at the temperature of 180 to 500 DEG C, finally obtaining an N-TiO2/SPC bifunctional adsorption material. The bifunctional adsorption material disclosed by the invention is applied to synchronous adsorption and catalytic degradation of VOCs of aldehydes and benzene series.

The invention discloses a preparation method of a graphene/titanium oxide composite visible light photocatalyst. The preparation method comprises the following steps: 1, taking graphene oxide, dispersing the graphene oxide in an alcohol-water solution, and carrying out ultrasonic treatment on the obtained mixed dispersion for a period of time; 2, slowly dropwise adding a TiCl4 solution to a solution obtained after the ultrasonic treatment while stirring; 3, continuously magnetically stirring a solution obtained after the dropwise addition for a period of time; and 4, transferring a solution obtained after the stirring to a hydrothermal reaction kettle, carrying out a heating reaction in an oven, cooling the obtained reaction product, filtering the cooled reaction product, washing the filtered reaction product, and drying the washed reaction product to obtain the visible light response photocatalyst. The preparation method of the composite visible light photocatalyst is simple, raw materials are easy to purchase, have low prices and are environmentally-friendly, and the problem of increase of the solar energy utilization rate, caused by expansion of the absorption spectrum to visible lights, by narrowing the forbidden bandwidth of catalysts is solved. The graphene/titanium oxide composite visible light photocatalyst prepared in the invention can be widely applied to sewage treatment and air purification.

The invention discloses a g-C3N4 crystal phase/amorphous phase homojunction as well as a preparation method and application thereof. The homojunction is characterized in that crystal phases and non-crystal phases are alternately distributed on the same graphite phase C3N4 to form the homojunction. The preparation method comprises the following steps of performing primary heat polycondensation on nitrogen-containing organic precursors; grinding the obtained blocky graphite phase carbon nitride into powder; performing ultrasonic thinning and dispersion to obtain powder; performing secondary heatpolycondensation on the powder to obtain a product. The homojunction and the preparation method have the advantages that simplicity is realized; the implementation is easy; the cost is low; the repeated performance is good; the enlightening significance is realized on the synthesis of layered graphene semiconductor materials. The crystal phase and amorphous phase part of the obtained homojunctionis adjustable in proportion. Compared with the homojunction with the conventional appearance, the homojunction has higher catalysis activity, is favorable for the efficient separation of electron-hollow hole pairs, and improves the reaction activity. Compared with the homojunction prepared by a seed growth method, the homojunction has the advantages that the synthesis process is simple. In an aspect of visible light photocatalytic degradation, the relatively excellent photocatalytic performance is far higher than that of ordinary flaky carbon nitride.

The invention discloses a Ni3P/SiO2 catalyst as well as a preparation method and application thereof. The Ni3P/SiO2 catalyst is composed of a SiO2 carrier and Ni3P loaded on the SiO2 carrier, the mass percent of Ni3P in the catalyst is 10-45%, the balance is the SiO2 carrier, the particle size of Ni3P in the catalyst is 6-15 nanometers, and the specific surface area of the catalyst is 50-250 m<2>/g. Experiments show that the Ni3P/SiO2 catalyst provided by the invention is high in activity, high in selectivity and good in stability, especially has the advantages that the selectivity of methyl glycolate can still reach 85% or above under deep conversion of dimethyl oxalate (greater than 99.9%), a high-selectivity temperature window is wide and the like, and can be used as a catalyst for a reaction of preparing methyl glycolate through hydrogenation of dimethyl oxalate; and in addition, the preparation method disclosed by the invention is simple, mild in condition and easy to realize large-scale production.

The invention belongs to the field of chemical engineering, particularly relates to a method for converting synthesis gas into low-carbon olefin. The method for converting synthesis gas into low-carbon olefin, provided by the invention, includes the following steps: (a), preparation of a catalyst; (b), conversion of low-carbon olefin. The low-carbon olefin obtained through adopting the method for converting synthesis gas into low-carbon olefin accounts for 80% above the total product, which is about 10% higher than 72-74% in the prior art.

The invention discloses a preparation method of an Ag2Se/GO nano material with a micro-flower structure and application of the nano material in photocatalytic degradation of textile waste liquid. Thepreparation method comprises the following steps: pouring a mixed solution containing a silver source and a selenium source into a high-pressure reaction kettle which is lined with polytetrafluoroethylene and contains graphene oxide sheets, and then sealing and placing in a reaction furnace to perform heating for reaction to obtain the nano material with the Ag2Se/GO micro-flower structure, wherein the mixed solution containing the silver source and the selenium source is prepared by dissolving silver nitrate in deionized water, adding EDTA, mixing uniformly, adding selenium powder and sodiumborohydride into the mixed solution, and stirring uniformly. The Ag2Se/GO nano material with the micro-flower structure synthesized by the preparation method has excellent photocatalytic performance and can be used as a photocatalyst to purify textile wastewater, degrade colored dyes and the like.

A preparing method of a Ag3PO4@Ag/carbon sphere ternary heterojunction composite material capable of selectively removing cationic dye is disclosed. The method includes subjecting a glucose solution having a mole concentration of 0.5 mol/L to a hydrothermal reaction in a hydrothermal reaction kettle at 180 DEG C for 5-8 h to obtain carbon spheres having an average diameter of 0.3-0.7 [mu]m; addingdropwise ammonia water having a concentration of 10-25 wt% into a AgNO3 solution having a concentration of 0.05-0.2 mol/L to prepare a transparent Tollens' reagent; adding the carbon spheres into theTollens' reagent with the mass ratio of the carbon spheres to the AgNO3 being 0.01-0.1:1 and stirring the mixture for 2-10 h; adding dropwise a Na2HPO4 solution into the mixture with the mole ratio of Ag<+> to PO<4><3-> being 3:1-10; reacting the mixture for 1-3 h; then performing centrifugation, filtration and washing; and drying a product in a vacuum drying oven at 50 DEG C to obtain the composite material. The composite material can rapidly and efficiently remove cationic dye and the synthesized composite material has good stability.

The invention discloses a three-dimensional material based on a copper sulfide lamellar structure and a preparation method thereof. The material comprises copper sulfide nano sheets which grow perpendicularly to a foam copper skeleton, and the diameter of the copper sulfide nano sheets is 5-8 micrometers. The material is characterized in that foam copper is used as a substrate skeleton material, and the copper sulfide lamellar nano structure is perpendicularly grown on the surface of the foam copper. The preparation method comprises the following steps: dispersing sulfur powder into methanol,adding the foam copper into the prepared sulfur powder methanol dispersion liquid, placing the obtained material in a reaction kettle, and keeping a temperature of 60-90 DEG C for 3-6h. The copper sulfide lamellar structure provided by the invention has the advantages of a simple preparation process and high catalytic activity, thus the three-dimensional material based on the copper sulfide lamellar structure has potential application prospects in the fields of photocatalysis, catalyst carriers, electrochemical hydrogen storage and the like.

The invention discloses a preparation method of a super-hydrophilic-super-hydrophobic controllable ZIS nano-grading material and an application thereof, and the preparation method comprises the following steps: taking InCl3.4H2O, ZnSO4.7H2O and CH3CSNH2 as raw materials, and carrying out a one-step hydrothermal reaction to obtain a Zn3In2S6 nano-grading material; and by regulating and controllingthe addition amount of CH3CSNH2 in the raw materials, realizing the regulation and control of the surface hydrophilic or hydrophobic characteristics of the obtained Zn3In2S6 (ZIS) nano-grading material. Under visible light, the obtained surface super-hydrophilic ZIS shows excellent removal activity of organic/inorganic pollutants in a water body, and the obtained surface super-hydrophobic ZIS shows excellent conversion activity of pollutants in the atmosphere.

The invention discloses a preparation method of a catalyst for synthesizing p-hydroxybenzonitrile. The preparation method comprises the following steps of: 1) adding a phosphorus source to water and stirring and dissolving at 50 DEG C to 85 DEG C, and adding sieved calcium source in batches; after filtering and washing, drying at 120 DEG C to 180 DEG C, and pulverizing and sieving to obtain a precursor powder; 2) adding an auxiliary agent to the sieved precursor powder and mixing uniformly, adding deionized water, conducting extrusion molding, to obtain a shaped catalyst precursor, and dryingto constant weight, wherein mass ratio of the precursor powder to the auxiliary agent to the deionized water is (50 to 75) to (4 to 10) to (24 to 40); 3) placing the shaped catalyst precursor to a muffle furnace, heating at a temperature increase rate of 4 DEG C to 8 DEG C/min to 550 DEG C to 700 DEG C and keeping the temperature for 2 to 5 hours, and synthesizing the catalyst for synthesizing p-hydroxybenzonitrile. The catalyst obtained by the invention is used for the gas-solid phase synthesis of the p-hydroxybenzonitrile and has the advantages of high activity, good selectivity and servicelife equal to or more than 4,000 hours.

The invention discloses a calcium polysulfide vulcanized zero-valent iron nano composite material as well as a preparation method and application thereof. The preparation method comprises the following steps: uniformly mixing a calcium polysulfide solution with a sodium borohydride solution, dropwise adding the mixture into a ferrous sulfate heptahydrate solution, carrying out a stirring reaction, introducing inert gas into each solution before the reaction to remove dissolved oxygen in water, in the reaction process, stirring under the protection of inert gas, after the reaction is finished, collecting nanoparticles in a centrifugal mode, then carrying out cleaning and freeze drying so as to obtain the calcium polysulfide vulcanized zero-valent iron nano composite material, wherein the molar ratio of the sulfur element to the iron element is 1: 20-1: 2. The vulcanized zero-valent iron is prepared through calcium polysulfide modification, the stability and the reduction characteristic are remarkably improved, 100% removal can be rapidly achieved when the vulcanized zero-valent iron is used for removing high-concentration Cr (VI) in water, the vulcanized zero-valent iron can be repeatedly used, meanwhile, long-term storage and long-distance transportation are facilitated, the preparation process is simple, and the invention has wide industrial application prospects.

The invention relates to a method for producing photocatalysis ceramics with adjustable surface gloss, which is characterized in that: the production method includes the following steps: (1) preparing catalyst at first, preparing pure titanic oxide sol, adjusting pH of sol, and producing sol type titanic oxide photocatalyst with corresponding pH value,(2) coating with sol type titanic oxide photocatalyst with dosage of 5-50 mL/m in spray finishing, lifting, brushing or dipping type on the surface of ceramics, for producing photocatalysis ceramic with adjustable surface gloss by heat-treatment or direct cooling and drying, wherein, the heat treat condition is: at 100-600 DEG C for 10-120 minutes. The method not only has simple steps, but also can be used for producing ceramics with required glossiness according to the design requirement.

The invention relates to a method for preparing a novel ZnO/Se/SiO2 composite material and application thereof in preparation of phthalide. The preparation method comprises the following steps: dissolving o-toluic acid in an organic solvent, adding a ZnO/Se/SiO2 composite material, stirring at room temperature to react for 20-24 hours, filtering and reclaiming the ZnO/Se/SiO2 composite material, and concentrating the filtrate to remove the organic solvent to obtain phthalide.