53results about How to "Increase the rate of oxidation reactions" patented technology

A liquid-phase oxidation method of cyclohexane is provided. The oxidation method is characterized in that the method comprises carrying out reaction of molecular oxygen-containing gas and cyclohexane at a mole ratio of (0.1-10):1 in a micro-reactor under 0.8-2.5MPa at 145-200 DEG C for 0.5-30min. The micro-reactor is a micro-channel reactor or a micro-tube reactor. The method ensures safety and enhances heat transfer, and can remarkably improve the oxidizing reaction speed of cyclohexane and the total selectivity of cyclohexanone, cyclohexanol and cyclohexyl hydrogen peroxide.

A spherical asphalt-base activated carbon rich in mesopores is prepared from petroleum or coking by-product through preparing the asphalt with high softening point, adding arylhydrocarbon and thermosetting phenolic resin, spherisizing, oxidizing, charring and activating.

The invention relates to a preparation method for manganic manganous oxide. The method is as follows: in an enclosed reaction container, a manganese source with an average valence of manganese being less than 8/3 is placed in a reaction solution, the reaction is carried out with heating, the situation is kept that the pressure or partial pressure of oxidizing gases in the reaction system is more than or equal to 1 standard atmospheric pressure, and a crude product of manganic manganous oxide can be prepared after the reaction is completed. Optionally, the enclosed reaction container has an oxidizing gas inlet or has an oxidizing gas inlet and a generation gas outlet simultaneously. The oxidation reaction rate is raised, the oxidation reaction time is shortened, the manganic manganous oxide crystal growth integrality is raised, the crystal defect is reduced, and high purity and high quality are obtained.

The present invention belongs to the field of air purification and water purification technology. Its technical scheme is characterized by that it utilizes various adsorption materials (such as various active carbons, molecular sieves, zeolites, silica gels and active carbon fibre, etc.) with high specific surface area and high-valent oxides of Mn (such as various MnO2 and Mn2O3, etc.), and makes them undergo the processes of mixing and stamping to obtain various filter materials (including plates type, cabinet type, column type and granules type, etc.). The polluted air (or sewage) can be passed through said filter material, the pollutant can be adsorbed on the material surface by adsorbing agent, after the pollutant is oxidated by oxide of Mn, it can be converted into CO2 and H2O, and the adsorbing agent can be regenerated, so that said invention can high-effectively purify air or sewage.

The present invention relates to a preparation method and a preparation system of a trimanganese tetraoxide complex. The preparation method comprises: introducing micro-nano gas bubbles into a reaction liquid mixture containing a manganese source and a non-manganese element-derived raw material to obtain a reaction liquid-gas mixture, and carrying out a reaction to obtain a non-manganese element-containing trimanganese tetraoxide complex, wherein the micro-nano gas bubbles contain oxidizing gas, can be introduced along with a solvent, can be directly introduced along with the reaction mixture,can be continuously introduced, and can further be introduced in one time. According to the present invention, by introducing the micro-nano gas bubbles containing the oxidizing gas into the reactionsystem containing the manganese source and the non-manganese element-derived raw material, the oxidation reaction rate is improved, and the oxidation reaction time is shortened; and the generation rate of the trimanganese tetraoxide complex is increased, the particle size of the trimanganese tetraoxide complex is reduced, and the develop integrity of the trimanganese tetraoxide complex crystal and the mixing uniformity of the complex are improved.

The invention relates to a preparation method and a preparation system of trimanganese tetraoxide. The preparation method comprises: introducing micro-nano gas bubbles into a reaction liquid mixture containing a manganese source to obtain a liquid-gas mixture containing the micro-nano gas bubbles and the reaction liquid mixture, and carrying out a reaction to obtain trimanganese tetraoxide, wherein the micro-nano gas bubbles contain oxidizing gas, and the average valence of the manganese in the manganese source is less than 8/3. According to the present invention, by introducing the micro-nanogas bubbles containing the oxidizing gas into the reaction system containing the manganese source, the oxidation reaction rate is improved, and the oxidation reaction time is shortened; and the generation rate of the trimanganese tetraoxide is increased, the particle size of the trimanganese tetraoxide is reduced, the develop integrity of the trimanganese tetraoxide crystal is improved, and the defect of the crystal is reduced.

The invention discloses a hollow core-shell structure catalyst for catalytic oxidation of nitrogen oxide and a preparation method of the hollow core-shell structure catalyst. The catalyst is a gamma-MnO2@MOx catalyst with a hollow core-shell structure, which is obtained by taking gamma-MnO2 of a hollow structure as a catalyst core and coating a mesoporous structure metal oxide MOx shell with a certain mass fraction on the catalyst core. The invention also discloses a preparation method of the catalyst. The hollow core-shell structure catalyst obtained by the method has the multi-functional advantages of high activity at low temperature, strong poisoning resistance and good stability, and has the advantages of simple preparation process, low raw material cost and good industrial applicationprospect.

The invention discloses a quaternary pyridine salt type alkaline or weak alkaline polymer membrane, which is used as a membrane material of a direct alcohol fuel cell. The quaternary pyridine salt type alkaline or weak alkaline polymer membrane is produced from polymer materials which are subjected to membrane formation, quaternization reaction and alkalization reaction. The polymer materials are polymer materials produced by pyridine quaternization and a blend prepared from the polymer materials and polyvinylidene fluoride, bisphenol A polyether sulfone, polyether-ether-ketone, polyether sulfone, polyethersulfoneketone, poly(phthalazinone ether ketone), poly(phthalazinone ether sulfone) or poly(phthalazinone ether sulfone ketone) and so on which are blended. A direct methanol fuel cell (AMDMFC) adopting the quaternary pyridine salt type alkaline or weak alkaline polymer membrane works under alkaline or weak alkaline conditions, has the advantages of improving the oxidation reaction rate of methanol, eliminating the methanol permeation caused by electric dragging, widening the selection range of catalysts (including the catalysts of anodes and cathodes) and cell materials, simplifying water management and so on.

The invention relates to a method and a reaction system for producing low-sulfur petroleum coke. The method comprises the following steps: (1) uniformly mixing a residual oil raw material with a diluting solvent, adding an oil-soluble oxidation catalyst and an oxidant, and carrying out a reaction, so that the sulfur-containing compound in the residual oil is oxidized into sulfone and sulfoxide; (2) distilling the residual oil after the oxidation reaction to remove the diluting solvent; and (3) feeding the oxidized residual oil into a delayed coking reactor, decomposing the sulfone and the sulfoxide to generate sulfur oxide under a delayed coking condition, and feeding the sulfur oxide into a cracking gas phase to obtain a low-sulfur petroleum coke product and sulfur-containing cracking gas. The method provided by the invention can be used for producing low-sulfur petroleum coke, wherein the sulfur content in the petroleum coke can be reduced by more than 50%, and the sulfur in the petroleum coke is transferred into a gas phase so as to be recycled, so that the requirement of environmental protection is met; and an oil-soluble metal catalyst is adopted, so that the catalyst dosage is small, the catalytic efficiency is high, the catalyst does not need to be separated after reaction, and the technological process is simplified.

The invention discloses an MoS2/schwertmannite Fenton composite catalyst, and a preparation method and application thereof, and belongs to the field of water treatment. The structure of the compositecatalyst is as follows: MoS2 with a lamellar structure is distributed on the surface of sphere-shaped schwertmannite. In an X-ray diffraction (XRD) pattern of the catalyst, characteristic diffractionpeaks of schwertmannite exist at positions of 26.26 degrees, 35.16 degrees, 46.53 degrees and 61.34 degrees, and characteristic diffraction peaks of MoS2 exist at positions of 14.38 degrees, 32.67 degrees, 35.87 degrees, 39.53 degrees, 49.79 degrees, 58.33 degrees and 72.79 degrees. The composite catalyst can accelerate circulation of Fe<3+>/Fe<2+> in a Fenton-like oxidation reaction under illumination and light-shielding states, and oxidation reaction efficiency is promoted. The invention further provides the preparation method of the catalyst and application of the catalyst in the field of wastewater treatment.

The invention relates to a preparation method of tetrabutylthiuram disulfide used as a rubber vulcanization accelerator. By virtue of the preparation method, tetrabutylthiuram disulfide is prepared by a two-step process, namely sodium dibenzyl amino sulfonate is prepared from dibenzylamine, carbon disulfide and sodium hydroxide and then oxidized by a hydrogen peroxide oxidant to prepare tetrabutylthiuram disulfide. According to the preparation method, carbon disulfide is excessive, so that dibenzylamine is fully reacted; excessive unreacted carbon disulfide is separated and recycled in time; the production cost is reduced; the pollution to the environment is low; low-concentration hydrogen peroxide with a concentration of 5-20wt% is used as the oxidant and applied to the oxidation reaction; hydrogen peroxide has the characteristics of being low in cost, stable in property, small in pollution, easy to store and transport and high in safety; the cost can be effectively reduced; the pollution to workers in the operation process is alleviated; the safety is improved; meanwhile, the oxidization effect is not reduced.

The invention discloses a composite catalyst of MoS2/defective MIL-100 (Fe) and a preparation method and application thereof. According to the composite catalys, MIL-100 (Fe) grows on MOS2 in situ toobtain a MoS2/MIL-100 (Fe) material, the MoS2/MIL-100 (Fe) material is activated at a high temperature to obtain the composite catalyst, the composite catalyst is formed by bonding MOS2 and MIL-100 (Fe), and the mass ratio of MOS2 to MIL-100 (Fe) is 0.2-0.8: 1. According to the composite catalyst, the reduction effect of Mo < 4 + > is utilized; meanwhile, the iron-based active component exposed bythe defective MIL-100 (FE) is utilized, good physicochemical properties of MoS2 and the defect type MIL-100 (Fe) are considered at the same time; a favorable way is provided for diffusion of pollutant molecules and H2O2 molecules in a Fenton-like system; the defect that the promotion effect of MoS2 composite catalysts on Fenton-like compounds in the prior art needs to depend on light conditions is overcome, the oxidation reaction promotion efficiency is improved, the pH application range is wide, and good catalytic degradation performance is still kept under the neutral pH condition.

The invention relates to a petroleum sulfoxide and a preparation method thereof. The preparation method includes: taking high-sulfur crude oil with a sulfur content of greater than 2% as the raw material, collecting fraction through true boiling point distillation cutting, taking H2O2 and MnSO4 as the oxidation system to oxidize the collected fraction at room temperature so as to obtain a petroleum sulfoxide crude product, and using benzenesulfonic acid and cyclohexane as the extraction agent for purification of the petroleum sulfoxide crude product so as to finally obtain the petroleum sulfoxide. According to the invention, H2O2 and MnSO4 are adopted as the oxidation system, wherein H2O2 serves as the oxidizing agent and MnSO4 serves as the catalyst. The oxidation system can accelerate the oxidation reaction rate of crude oil fraction, shorten the reaction time, and lower the oxidation reaction temperature so as to save energy consumption. Cyclohexane with low toxicity to human is employed as the solvent so as to reduce the harm of toxic solvent to human and environment, thus being beneficial to environmental protection. The fraction cut by true boiling point distillation has high petroleum thio-ether content, and is conducive to improving the preparation efficiency of petroleum sulfoxide.

The invention discloses a method for preparing a carbon aerogel catalyst supporting atom-scale noble metals. A carrier consists of carbon aerogel, atom-scale noble metals are supported, and the noblemetals are one or more of Pd, Pt, Au and Ag. The method comprises the following steps: firstly, preparing RF (Resorcinol Formaldehyde) organic aerogel, namely preparing the RF organic aerogel from formaldehyde (F) and resorcinol (R) in the presence of an alkali catalyst by using a sol-gel method; secondly, preparing carbon aerogel, namely carrying out high-temperature carbonization on the RF organic aerogel so as to obtain the carbon aerogel; and finally preparing the carbon aerogel catalyst, namely mixing the carbon aerogel with a metal precursor solution, and preparing the catalyst by usinga deposition-settling method. As metals are dispersed onto the carrier on an atom scale, the catalyst prepared by using the method is good in catalysis effect and can be applied to normal-temperaturecatalytic degradation of volatile organic compounds (VOCs) gases.

The invention belongs to the field of battery material recovery, and discloses a preparation method and application of iso-phosphorus-manganese-iron-ore type iron phosphate, and the method comprises the following steps: mixing lithium iron phosphate with a solvent, adding an acid solution, and adjusting the pH value to be acidic to obtain an acidic lithium iron phosphate solution; and adding a transition metal additive into the acidic lithium iron phosphate solution, strengthening the microenvironment, carrying out leaching reaction, and conducting filtering to obtain iso-phosphorus-manganese-iron-ore type iron phosphate and a lithium-rich solution. According to the method, lithium iron phosphate and water are mixed, acid is added to maintain the pH to be 2-6, then a nickel-cobalt-manganese transition metal additive is added through a microenvironment strengthening method to achieve a surface catalytic enhancement reaction, generation of hydroxyl radicals is promoted, the oxidation reaction rate of ferrous iron is greatly increased, and therefore selective leaching of lithium under the oxygen/air condition is achieved; and the leaching rate of lithium in the leachate reaches 90.5-99.9%, and the content of iron and the content of phosphorus in the leachate are both lower than 0.1 ppm.

The invention relates to a method for separating and recycling iridium from an iridium-containing waste catalyst. The method comprises the six steps of roasting pretreatment, acid leaching, high-temperature oxidation, iridium trioxide decomposition, reduction, acid pickling and water washing. A strong oxidant is used for treating and recycling metal iridium from the iridium-containing waste catalyst, the strong oxidant O3 produces O2 through ultraviolet irradiation, the production cost is reduced, the oxidation reaction speed is reduced, the period is shortened, the technology is simple, and the method is environmentally friendly and high in iridium recycling rate.

The invention discloses a flue gas desulfurization system. The flue gas desulfurization system comprises an absorption tower, a wet type electric dust collector, a dehydrating unit and a circulating unit, wherein the absorption tower further comprises a slurry tank which is arranged at the bottom layer of the absorption tower, a flue gas inlet for introducing flue gas into the absorption tower, aspraying device arranged above the flue gas inlet, and a flue gas outlet which is formed in the top of a desulfurization tower. Through the absorption effect of the absorption tower, further dust removal is performed through the wet type electric dust collector, so that a sulfur component and other harmful components in the flue gas are removed, and a second product generated by absorption effectof the absorption tower is processed. Compared with the prior art, the flue gas desulfurization system can improve desulfurization efficiency, reduces corrosion loss in desulfurization reaction, can recycle wastewater generated in a recycling process, and is environmentally friendly and energy-saving.

The invention discloses an oxidation method of a hydrogen peroxide production process. The method comprises: firstly, contacting a hydrogen-peroxide-producing hydrogenated liquid in an anthraquinone method with an oxygen-containing gas in a preprocessor to form an intermediate association complex; then performing a corresponding oxidation reaction on a material containing the intermediate association complex, according to the hydrogenation effect and the tetrahydroanthraquinone content; and finally allowing the oxidation product to undergo gas-liquid separation and to be led out of an apparatus for the next process. The method allows the hydrogenation reaction to reach proper standing time, so that the oxidation reaction rate is greatly increased, decomposition of hydrogen peroxide is reduced, complete oxidation time is shortened, and the oxidation yield is improved.

The invention discloses a water area rescue dry-type rescue garment which comprises a waterproof breathable layer, a wear-resistant layer, a chloroprene rubber layer and an elastic rope. The wear-resistant layer is sewn on the inner side of the waterproof breathable layer, the chloroprene rubber layer is sewn at the neckline and cuff positions of the waterproof breathable layer, and the elastic rope is sewn at the waist position of the waterproof breathable layer. A heating assembly is also included and is sewn on the inner side of the wear-resistant layer, and the waterproof breathable layer, the wear-resistant layer and the heating assembly jointly form a dry type rescue garment main body. In actual use, the water area rescue dry-type rescue garment can perform self-heating, continuously provide heat for rescue workers and ensure that the body temperature always meets the body movement requirement, meanwhile, the anti-collision capacity of the chest of a user can be improved, the user can carry a life jacket without holding the life jacket by hand, search and rescue work is not hindered, and when buoyancy provided by the rescue garment is insufficient, rapid inflation can be carried out so that the buoyancy of the rescue garment is improved, and the rescue requirements of rescue workers are met.

The invention provides a method for extracting Cr from a Cr-containing material by liquid-phase oxidation. The method comprises the steps as follows: Cr is extracted from the Cr-containing material bythe liquid-phase oxidation, and the Cr-containing material is pretreated before Cr is extracted from the Cr-containing material by the liquid-phase oxidation; the Cr-containing material and alkali are subjected to abrasive treatment and roasting in sequence. According to the method, the Cr-containing material is pretreated, so that reaction rate of Cr is increased, Cr conversion rate is increased, reaction temperature is reduced, reaction time is shortened, Cr content of leaching residues is reduced, resource utilization rate is increased, and production cost is reduced.

The invention relates to the technical field of chemical engineering, and discloses a catalytic oxidation process device for magnesium sulfite. The process device comprises a pulping device, an oxidation device, an evaporation device, a crystallization device and a collection device which are sequentially connected through pipelines, a granular catalyst is arranged in the oxidation device in bulk,the catalyst is in a free suspension state in a reaction solution, and a reflux device communicated with the bottom and the side part of the oxidation device is arranged on the outer side of the oxidation device and is used for stirring the reaction solution in the oxidation device. The process device is reasonable in design, all the devices are connected in series, the magnesium sulfite can be efficiently catalyzed and oxidized to generate magnesium sulfate, magnesium sulfate heptahydrate is finally prepared through evaporation concentration and cooling crystallization, the operation efficiency is high, and energy consumption is low; and a catalytic oxidation process method for the magnesium sulfite, provided by the invention, is simple and feasible, mild in reaction condition, low in energy consumption, short in reaction period, low in operation cost and suitable for promotion and application.

The invention relates to a landfill leachate treatment method, which belongs to the technical field of wastewater treatment, and comprises the following steps: 1, adjusting the pH value of landfill leachate to obtain pH-adjusted wastewater; step 2, adding an iron-carbon filler into the wastewater subjected to pH regulation, and then adding ferrous sulfate heptahydrate and hydrogen peroxide to obtain wastewater subjected to oxidation treatment; 3, aerating the wastewater subjected to oxidation treatment to obtain wastewater subjected to aeration treatment; step 4, adding a flocculating agent and a coagulant aid into the wastewater subjected to aeration treatment for flocculating settling, and filtering to obtain filtrate; and 5, adjusting the pH value of the filtrate, adding persulfate into the wastewater under the conditions of ultraviolet light irradiation activation and ozone aeration, carrying out an oxidation reaction, and discharging. According to the method, the removal rate of organic matters is increased through an iron-carbon micro-electrolysis-Fenton and ozone-ultraviolet-persulfate two-round composite oxidation process; and the modified anionic polyacrylamide coagulant aid is introduced, so that the flocculation effect is improved.

The invention discloses a method for preparing a benzaldehyde catalyst through catalytic oxidation of benzyl alcohol. The method comprises the following steps: taking La2O3@COF, epoxypropane, hydrochloric acid, deionized water, absolute ethyl alcohol, La2O3, benzidine and anhydrous THFA as main raw materials, preparing La2O3@COF aerogel particles by adopting a supercritical CO2 drying technology,preparing wet gel by adopting a simple sol-gel method, and preparing the aerogel particles with uniform pores and high specific surface area by adopting the supercritical drying technology. Accordingto the method disclosed by the invention, the preparation process is novel, raw material cost is low, application range is wide, a normal pressure drying method can be used, a supercritical drying process can also be used, and the obtained catalyst has excellent catalytic performance on the oxidation reaction of benzyl alcohol.