225 results about "Ozonolysis" patented technology

A composition for purifying an ozone-containing gas comprising activated carbon, in which the percentage of the volume of pores having a pore diameter of 0.4-0.8 nm in the volume of pores having a pore diameter of 0.4-2.0 nm is 75% or more, and an ozone decomposition catalyst powder is disclosed. Also disclosed is a filter for purifying an ozone-containing exhaust gas comprising activated carbon powder, in which the percentage of the volume of pores having a pore diameter of 0.4-0.8 nm in the volume of pores having a pore diameter of 0.4-2.0 nm is 75% or more, and an ozone decomposition catalyst powder carried on a fiber supporting body. The composition and filter of the present invention can remarkably reduce the content of ozone and volatile organic compounds in ozone-containing exhaust gas from printers.

Methods of treating single walled and multiwalled carbon nanotubes with ozone are provided. The carbon nanotubes are treated by contacting the carbon nanotubes with ozone at a temperature range between 0° C. and 100° C. to yield functionalized nanotubes which are greater in weight than the untreated carbon nanotubes. The carbon nanotubes treated according to methods of the invention can be used to prepare complex structures such as three dimensional networks or rigid porous structures which can be utilized to form electrodes for fabrication of improved electrochemical capacitors. Useful catalyst supports are prepared by contacting carbon nanotube structures such as carbon nanotube aggregates, three dimensional networks or rigid porous structures with ozone in the temperature range between 0° C. and 100° C.

The present invention relates generally to polymers and monomers derived from agricultural feedstocks, and more particularly to methods for the production of monomers from renewable agricultural resources such as feedstocks, for example canola, flax and tallow, and polymers, in particular polyurethanes produced from monomers derived from such feedstocks. The present invention also relates to novel processes for the production of short-chain alcohols, as well as hydroxyl wax esters, from renewable feedstocks. An improved apparatus for carrying out ozonolysis reactions is also disclosed.

The invention provides an ozonolysis catalyst which comprises metal foamed nickel and manganese or iron oxide, wherein the metal foamed nickel is adopted as a catalyst carrier and a catalyst auxiliary active component; and the manganese or iron oxide adopted as a main active component is coated on the surface of the foamed nickel by a soaking way. Obviously, the cost of preparation materials is low. The invention provides a preparation method of the ozonolysis catalyst, which comprises the following steps of: A. mixing an active component solution comprising manganese nitrate or ferric manganese nitrate; B. soaking the foamed nickel adopted as a carrier into the active component solution; and C. drying the soaked carrier and baking at a certain temperature. Accordingly, the preparation process is simple and convenient.

A process for preparing an alpha, omega-dicarboxylic acid or an ester thereof, which includes (a) subjecting at least one unsaturated fatty acid or fatty acid derivative to ozonolysis to obtain an ozonolysis reaction mixture; and (b) oxidizing the ozonolysis reaction mixture with an oxidizing agent in the presence of an acid catalyst to obtain an oxidized reaction mixture comprising at least one alpha, omega-dicarboxylic acid or ester; wherein the process is performed using a solvent and the acid catalyst has a pKa of less than or equal to zero, as measured at 25° C.

A sidestream located hyper-plasma reactor having an axially discrete pattern of alternating regions of active and passive electric field along the axial direction. The hyper-plasma reactor has great efficacy in terms of ultra low power consumption and copious production of NOx converting aldehydes in the absence of NO by applying plasma power only to an air and hydrocarbon mix sidestream gas flow. Only a small fraction (1% to 2%) of plasma power is required as compared to that for a conventional plasma reactor to treat the full exhaust gas stream. The hyper-plasma reactor produces ozone which reacts subsequently with hydrocarbons to produce aldehydes (“ozonolysis”). The sidestream location of the hyper-plasma reactor allows for the full exhaust stream to bypass it, without significantly affecting the overall NOx conversion performance in the catalytic converter.

A sidestream located hyper-plasma reactor having an axially discrete pattern of alternating regions of active and passive electric field along the axial direction. The hyper-plasma reactor has great efficacy in terms of ultra low power consumption and copious production of NOx converting aldehydes in the absence of NO by applying plasma power only to an air and hydrocarbon mix sidestream gas flow. Only a small fraction (1% to 2%) of plasma power is required as compared to that for a conventional plasma reactor to treat the full exhaust gas stream. The hyper-plasma reactor produces ozone which reacts subsequently with hydrocarbons to produce aldehydes (“ozonolysis”). The sidestream location of the hyper-plasma reactor allows for the full exhaust stream to bypass it, without significantly affecting the overall NOx conversion performance in the catalytic converter.

The invention discloses a packing type intelligent cleaning nursing bed. The packing type intelligent cleaning nursing bed comprises a bed frame, the bed frame is successively provided with a back-portion bed plate, a fixation bed plate and a leg-portion bed plate, a back-portion bed plate elevating apparatus is installed between the back-portion bed plate and the bed frame, a leg-portion bed plate ascending and descending apparatus is installed between the leg-portion bed plate and the bed frame, the fixation bed plate is provided with a nursing hole, the nursing hole is internally provided with a toilet seat apparatus, an excrement bag support apparatus is installed below the toilet seat apparatus on the fixation bed plate, a bag walking sealing apparatus is connected with the lower portion of the excrement bag support apparatus, an excrement bag collection apparatus is connected with the lower portion of the bag walking sealing apparatus, one side of the toilet seat apparatus is provided with a warm-water warm-air apparatus, and the warm-water warm-air apparatus is connected with a control unit. According to the invention, the packing type intelligent cleaning nursing bed can carry out packaging sealing and collection processing on urine and excrement of a patient in bed, can also carry out warm water flushing and warm air drying nursing after defecation of the patient, can perform ozonolysis on gases discharged through the uterine and the excrement, avoids pollution caused to environment and is reliable to use.

The invention provides a method for removing antibiotics in swine wastewater by use of metal oxide loaded active carbon. By combining metal oxide loaded active carbon with an ozone oxidation technology and adopting active carbon as an adsorbent, trace antibiotics in the water body can be adsorbed and are enriched on the surface of the active carbon so that the ozone contacts and reacts with antibiotics more easily; and meanwhile, the active carbon also can be used as a catalyst to catalyze ozonolysis to generate free radicals with strong oxidbillity. The metal oxide loaded on the surface of the active carbon also can catalyze ozonolysis to generate free radicals, and the antibiotic molecules are quickly oxidized and decomposed into smaller molecules and are further mineralized into carbon dioxide, water and inorganic salt so as to achieve the aims of degradation and antibiotic removal. The method provided by the invention realizes an obvious effect on removing antibiotics of the output swine wastewater treated by a biological treatment process, and has the advantages of economy, convenience, strong operability, good comprehensive treatment effect and the like.

A system and method for the treatment and reduction of sludge via ozonation in a wastewater treatment process is disclosed. The sludge treatment system comprises: a sludge ozonation reactor coupled to an activated sludge treatment basin and adapted to receive a liquid stream of sludge containing biosolids from the activated sludge treatment basin. The sludge treatment system also includes an ozone-enriched gas injection system operatively coupled to the reactor and adapted to inject ozone-enriched gas into the liquid stream at or upstream of the sludge ozonation reactor. The sludge ozonation reactor is configured to allow effective gas-liquid contacting between the ozone-enriched gas and the liquid stream so as to oxidize the biosolids in the liquid stream and initiate bacterial cell lysis thereby reducing the biosolids. Upon reduction of the biosolids, the liquid stream is returned via a return line to the activated sludge basin or other discharge point.

The invention provides a cerium-manganese composite oxide catalyst as well as a preparation method and application thereof. Chemical components of the cerium-manganese composite oxide catalyst are as follows: CeMnaOx, wherein the valence state of Mn is mainly valence 4 and the value of a is selected from natural numbers between 10 to 25. The preparation method of the catalyst comprises the following steps: firstly, mixing ammonium persulfate with a solution containing a cerium source and a bivalent manganese source and then completely dissolving to obtain a reaction solution; secondly, carrying out hydrothermal reaction on the reaction solution; carrying out post treatment on a reaction product to obtain a solid product; thirdly, roasting the solid product to obtain the cerium-manganese composite oxide catalyst. The cerium-manganese composite oxide catalyst has the advantages of excellent moisture resistance, high decomposition rate of ozonolysis under the condition of high humidity and high airspeed and high heat stability; in addition, the preparation method of the cerium-manganese composite oxide catalyst is simple and is suitable for decomposing ozone.

A method for surface treating a carbon-containing material in which carbon-containing material is reacted with decomposing ozone in a reactor (e.g., a hollow tube reactor), wherein a concentration of ozone is maintained throughout the reactor by appropriate selection of at least processing temperature, gas stream flow rate, reactor dimensions, ozone concentration entering the reactor, and position of one or more ozone inlets (ports) in the reactor, wherein the method produces a surface-oxidized carbon or carbon-containing material, preferably having a surface atomic oxygen content of at least 15%. The resulting surface-oxidized carbon material and solid composites made therefrom are also described.

Provided are a preparation method of a supported metal oxide catalyst for reinforcing ozonolysis and an ozone catalytic ozonation catalyst prepared through the preparation method. The preparation method is characterized by comprising the steps of solvent extracting, calcination, washing, acidizing, washing, drying, pelleting and the like; the obtained catalyst comprises 5% to 10% of active component, 30% to 70% of regenerated and activated carclazyte, 2% to 20% of pore-enlarging agent, 0.1% to 8% of gelatinizing agent and 10% to 50% of aluminum oxide powder, and the total mass is 100%; the active component comprises mixed rare earth oxide, and further comprises one or more of Fe2O3, MnO2, Fe3O4, TiO2, CuO and CoO, and the mass percent of the mixed rare earth oxide ranges from 5% to 40%. On the one hand, secondary pollution to the environment is avoided; on the other hand, the quantity of the used catalyst preparation raw materials is reduced, and production cost is greatly reduced. Compared with an independent ozone reaction, by means of adding of the catalyst, the reaction rate is increased, the degradation efficiency on organic matter is greatly improved, and running cost is reduced to a certain degree.

A method for producing ozone for use in ozonolysis reactions. Oxygen is separated from the mixture of ozone and oxygen from an ozone generation unit and is fed back to the oxygen feed to the generation unit. Nitrogen is fed to the ozone separation unit and the mixture of nitrogen and ozone is fed to the ozonation reactor where the ozone will react with organic compounds to produce desired end products.

The invention discloses a preparation method of supported rare earth doped manganese dioxide (MnO2) used in an ozone catalyst. The method comprises the following steps: taking gamma-Al2O3 as a carrier, taking MnO2 as an active constituent of the catalyst, and taking rare earth element as an additive, dissolving manganese sulfate and rare-earth metal nitrate in deionized water, adding isopropyl alcohol, stirring, mixing the carrier in the solution obtained after stirring, continuing stirring uniformly, heating, adding a KMnO4 solution, carrying out an in situ oxidation-reduction reaction on the surface of the carrier to obtain the rare earth doped MnO2 modified gamma-Al2O3. The method has the advantages that the preparation technology is simple; the catalyst is low in cost; the performance is stable; the ozonolysis efficiency is high; the application prospect is broad.

The present invention is generally directed to methods of ozonating CNTs in fluorinated solvents (fluoro-solvents), wherein such methods provide a less dangerous alternative to existing ozonolysis methods. In some embodiments, such methods comprise the steps of: (a) dispersing carbon nanotubes in a fluoro-solvent to form a dispersion; and (b) reacting ozone with the carbon nanotubes in the dispersion to functionalize the sidewalls of the carbon nanotubes and yield functionalized carbon nanotubes with oxygen-containing functional moieties. In some such embodiments, the fluoro-solvent is a fluorocarbon solvent, such as a perfluorinated polyether.

The invention discloses a preparation method for imipenem medicine intermediate 4AA. The preparation method comprises making 4-substituted aniline into an intermediate A, perform epoxidation on L-threonine to produce (2R, 3R)-epoxy butyric acid; enabling (2R, 3R)-epoxy butyric acid and the intermediate A to undergo a coupling reaction, obtaining an intermediate B, enabling the intermediate B to undergo a cyclization reaction, obtaining an intermediate C, enabling the intermediate C to undergo a hydroxyl protection reaction, obtaining an intermediate D, enabling the intermediate D to be oxidized to form an acetoxy group, and enabling an oxidized product to undergo an ozonation reaction, wherein G is H, F, Cl, Br, a methoxy group, oxethyl or an amino group; and R is H, straight chain alkyl of C1-C6, cyclopropyl, isopropyl, tert-butyl, a phenyl group, p-chlorophenyl, o-chlorophenyl, p-bromophenyl, o-bromophenyl, p-methoxyphenyl, o-methoxyphenyl or m-methoxyphenyl. According to the preparation method, raw materials are cheap and easy to obtain, reaction conditions are mild, the conversion rate and the yield rate are high, and the preparation method is suitable for industrial production.

Methods are provided for making reversible crosslinked polymers. Exemplary methods comprise reacting first and second thermoplastic polymers having non-hindered olefins in the presence of a metathesis catalyst under conditions sufficient to form a crosslinked polymer. In certain embodiments, the methods comprise providing a crosslink promoting additive to improve the strength of the crosslinked polymer. In some embodiments, the methods comprise decrosslinking a crosslinked polymer through a metathesis or an ozonolysis reaction.

The invention relates to an advanced water treatment technique for pollution removal through heterogeneous catalytic ozonation. Directed at the disadvantage that a conventional powdery catalyst is unfavorable for separation and easy to inactivate in a water phase, a construction method for a novel nanometer copper manganate spinel catalytic membrane reactor is provided. The construction method aims to combine heterogeneous ozonation with a ceramic membrane filtration technique, and utilizes active components (CuMn2O4) on a ceramic membrane catalytic layer to catalyze ozone so as to generate -OH with high oxidation capacity, wherein organic compounds can directly react with molecular ozone or react with -OH generated by ozone decomposition; meanwhile, an interception function of the ceramic membrane can assist to reinforce removal of 2-hydroxyl-4-methoxybenzophenone in water. In addition, ozone can react with humic acid and natural organic matters (NOMs) in the water, so the formation of membrane pollution is effectively controlled. A nanometer copper manganate spinel catalytic membrane provided by the invention has the following advantages: preparation process is simple; operation is convenient; a catalyst on membrane surface is uniformly distributed, so mass transfer efficiency is improved; and the membrane has potential application prospects in treatment of drinking water or wastewater containing pharmaceutical and personal care products (PPCPs).

The invention discloses a high-efficiency moisture-proof ozonolysis catalyst and a preparation method thereof, belonging to the technical field of ozone purification catalysts. According to the high-efficiency moisture-proof ozonolysis catalyst disclosed by the invention, the oxides of manganese, copper, nickel and cobalt are taken as active components; the preparation method of the high-efficiency moisture-proof ozonolysis catalyst is a sol-gel method; in the preparation process, manganese nitrate tetrahydrate, copper nitrate trihydrate, nickel nitrate hexahydrate and cobalt nitrate hexahydrate are dissolved in deionized water to obtain a nitrate solution; the nitrate solution is slowly added in a mixed solution of citric acid and a cationic surface active agent; after the pH value of the mixed solution is adjusted with ammonium hydroxide, constant temperature stirring is performed to obtain gel; and after the gel is dried, calcination is performed to obtain the ozonolysis catalyst. The preparation method disclosed by the invention is simple and low in costs, solves the problem that the ozonolysis catalyst is relatively poor in moisture-proof performance, and meanwhile, improves the ozonolysis efficiency; and the ozonolysis catalyst is long in service life, and the ozonolysis efficiency is not lowered when the ozonolysis catalyst is continuously used for a month.

The invention aims to provide a method and device for strengthened ozone treatment of nitrobenzene waste water in a high gravity filed, belongs to the field of nitrobenzene organic waste water treatment, and solves the problem of low ozone utilization ratio of a conventional rotating packed bed in the ozonation technology application. The method comprises the following steps: exhaust gas generated by ozonidation-oxidation reaction in the rotating packed bed and waste water are introduced into a hypergravity-electrolysis unit reactor, ozone and oxygen in the exhaust gas in the hypergravity-electrolysis unit reactor are reduced into hydrogen peroxide through electrocatalytical reduction; the generated hydrogen peroxide, along with the waste water, enters the rotating packed bed again in a circulation manner to be subjected to ozonidation-oxidation reaction; ozone is catalyzed to generate hydroxyl free radicals due to the fact that the content of the generated hydrogen peroxide is in the ozone decomposition acceleration concentration range, therefore organic matters in the waste water are decomposed through mineralization; the problem of exhaust gas treatment is solved, the recycle of the exhaust gas resources can be realized, the ozone can be catalyzed, the oxydative degradation efficiency is improved, when the method is compared with a process with a treatment process without hypergravity electrolysis stage, the oxidation efficiency is improved by 50%, the water treatment cost is reduced by 30%.

The invention provides a novel emulsion wastewater treatment process. The process comprises a regulating reservoir, an accident pool, a demulsification device, a paper strip filter, a ceramic film filter, an ozonolysis tank, a hydrolysis acidification pool, an aeration tank, a settling pond, a quartz sand filter and a water discharge pool. Aiming at the characteristics of emulsion water quality, physicochemical treatment units and biological treatment units are reasonably combined, and the process has the advantages of short and compact process procedures, high treatment efficiency, low energy consumption, long service life of a film component and the like.

The invention discloses an iron-copper composite oxide supported catalyst for room-temperature ozonolysis, particularly relates to an ozonolysis catalyst and a preparation method of the ozonolysis catalyst, and relates to the fields of catalysis and environmental protection. Honeycomb ceramics or multi-hole foam metal or activation carbon fiber cloth is used as a carrier of the catalyst, iron-copper composite oxide is a main active component, and gold is an auxiliary active component. The preparation method mainly comprises: A. Fe2O3-CuO composite oxide powder is prepared through the adoption of a precipitation method; B. the powder is dispersed in water, the PH value of the water is adjusted to be 7-8, HAuCl4 solution is dropped in the water, and the PH value of the water is again adjusted to be 7-8; C. the suspension liquid is heated to 30-50 DEG C, reacts for 1-3 hours, and is filtered, washed, dried and roasted to obtain a target product; and D. deionized water and silica gel which are provided with a fixed ratio are added to the catalyst to be processed into seriflux, the carrier of the catalyst is placed in the seriflux, soaked, taken out and then dried and roasted. The catalyst prepared by adopting the method is simple in process, low in cost, and high in catalytic activity and stability for ozonolysis in the indoor air.

The invention discloses a decoration space peculiar smell purifying method and device and belongs to the technical field of air purification. The decoration space peculiar smell purifying method comprises the purifying process that peculiar smell in a decoration space enters a low-temperature plasma reactor to be treated and then enters a catalytic reactor, ultraviolet rays and a by-product ozone produced by the plasma reactor can strengthen the photocatalytic pollutant and intermediate product degradation process, residual ozone and nitric oxide and other by-products are removed through an efficient ozone decomposition catalyst, and meanwhile the peculiar smell in the decoration space is after-purified through an activated carbon layer and then is discharged into a room together with negative ions. The peculiar smell in a newly decorated room can be effectively treated, the ultraviolet rays and ozone produced by a low-temperature plasma can be also fully utilized to strengthen the photocatalytic pollutant and intermediate product degradation, the two processes complement each other's advantages, the energy utilization rate can be improved, and meanwhile the negative ions are released to actively purify an indoor air environment.

The invention belongs to the field of synthesis of fine chemicals, and discloses a method for preparing 1,6-adipaldehyde. The method comprises the following steps of: performing an ozonization reaction on cyclohexene serving as a raw material by taking ozone as an oxidant and taking an organic solvent and glacial acetic acid as mixed solvents at the reaction temperature of between 20 DEG C below zero and 10 DEG C to obtain an ozonized reaction liquid, and directly performing a reducing reaction on an ozonide without separating; and reducing and decomposing by adopting zinc powder, and reacting under the protection of nitrogen gas at the room temperature for 0.5-1.5 hours to obtain 1,6-adipaldehyde. Compared with the conventional method, the method has the advantages: ozone is taken as an oxidant, so that high oxidizing capacity and high selectivity are realized, the environmental pollution is low, the requirement of ozonization reaction temperature is low, energy is saved, and consumption is lowered. After reacting, a product is easy and convenient to separate; and zinc acetate is recovered from a water phase by concentrating and crystalizing, so that production cost is lowered, and industrial production is facilitated.

The invention discloses a deep treatment method of coking wastewater. The method comprises the following steps of firstly adjusting pH of wastewater and filtering; reacting in a first-stage ozone reaction tower and a second-stage ozone reaction tower; carrying out ozonolysis in an enclosed intermediate water tank; treating in an aeration biological filtering tank; and introducing non-decomposed ozone into a tail gas absorber or destroyer. A treatment device mainly comprises a mixing sedimentation tank, the first-stage ozone reaction tower, the second-stage ozone reaction tower, the aeration biological filtering tank and conveying pipes, wherein the conveying pipe between the mixing sedimentation tank and the first-stage ozone reaction tower is connected with a multi-medium filter; and the conveying pipe between the second-stage ozone reaction tower and the aeration biological filtering tank is connected with the enclosed intermediate water tank and the tail gas absorber or destroyer is connected with two ozone reaction towers and the enclosed intermediate water tank. By combining ozone catalytic ozonation and the aeration biological filtering tank, non-biodegradable organic substances in wastewater are oxidized by virtue of ozone and mineralized or partially oxidized into easily degradable small molecular organic substances and the small molecular organic substances can be subjected to subsequent treatment by virtue of cheap organisms in the aeration biological filtering tank.