17results about How to "Efficient oxidation" patented technology

The invention belongs to the field of waste hard alloy recovery treatment, and particularly relates to a waste WC-Co hard alloy microwave oxidizing roasting method, the waste WC-Co hard alloy with the particle size below 150 mu m is subjected to oxidizing roasting under the assistance of microwaves, an oxidation product containing tungsten oxide and cobalt tungstate is obtained, the oxidizing roasting temperature is 400 DEG C or above, the oxidizing time is 30 min or above, and the oxidizing product containing tungsten oxide and cobalt tungstate is obtained. And the power of the microwave is more than 600W. According to the method, the waste WC-Co hard alloy is heated for oxidizing roasting by innovatively adopting microwave selective heating, so that the oxidation effect can be remarkably improved based on a brand new mechanism.

The invention discloses an oxidase mutant, a DNA molecule, an expression vector, a host cell and an application thereof, and a method for preparing 3-hydroxybuxinol. The oxidase mutant can prepare 3-hydroxybuxinol, and its amino acid sequence is a sequence of wild-type cytochrome P450 BM3 The monooxygenase is obtained by mutation of the amino acid sequence; the mutation includes one of L75A, L75F, L75G, L75I, L75M, L75S, L75T, L75V and one of F87A, F87G, F87I, F87L, F87M, F87S, F87T, F87V, and is not L75F and F87M, and is not L75I and F87L; or includes one of L75A, L75F, L75G, L75M, L75S, L75T, L75V, F87A, F87G, F87M, F87S, F87T, F87V.

The utility model belongs to the hydrometallurgy technical field discloses a kind of device for the oxidation treatment of aluminium chloride solution containing ferrous ion;The device for the oxidation treatment of aluminium chloride solution containing ferrous ion, including ozone generator (1), first oxidation reaction device (2), second oxidation reaction device (3), first water washing device (4), caustic washing device (5), second water washing device (6), air draught fan (7), refrigerated dryer (8), moisture absorption device (9) and gas holder (10), the device for the oxidation treatment of aluminium chloride solution containing ferrous ion in the utility model not only can efficiently oxidize ferrous ion in aluminium chloride solution containing ferrous ion, but also can recycle oxygen in tail gas, avoid oxygen resource waste, significantly reduce production cost.

The invention discloses a platinum nanoparticle / cerium oxide catalyst as well as a preparation method and application thereof. The platinum nanoparticle / cerium oxide catalyst comprises platinum nanoparticles and cerium oxide nanosheets, the platinum nanoparticles grow in situ and are uniformly distributed on the cerium oxide nanosheets, and the platinum nanoparticle / cerium oxide catalyst has an icosahedron structure. The preparation method comprises the following steps: reacting a mixed reaction system containing a platinum-containing metal precursor, a cerium-containing metal precursor, a surfactant, a reducing agent and a solvent to prepare the platinum nanoparticle / cerium oxide catalyst. The preparation method is simple and convenient in process and easy to operate, the prepared platinum nanoparticle / cerium oxide catalyst is high and stable in catalytic efficiency and high in toxicity resistance when serving as a methanol oxidation catalyst, the problems that an existing precious metal platinum catalyst is high in cost, not ideal in activity and poor in stability can be effectively solved, and the catalyst is suitable for industrial production. The catalyst can be widely applied to catalytic methanol oxidation reaction.

The invention discloses a platinum-iron-molybdenum catalyst with high activity and stability as well as a preparation method and application thereof, and belongs to the technical field of heterogeneous catalysis. The preparation method comprises the following steps: dissolving ferric nitrate, ammonium molybdate and citric acid in water, mixing, and adjusting the pH value to be less than 1.0; carrying out water bath gelation on the solution, drying, and calcining in a tubular furnace to obtain an iron molybdate carrier; mixing a platinum source with the iron molybdate carrier, drying by distillation in an oil bath, and calcining in a muffle furnace after drying to obtain the platinum-iron-molybdenum catalyst. The platinum-iron-molybdenum catalyst prepared by the preparation method disclosed by the invention can show efficient catalytic activity and excellent stability in propane oxidation reaction no matter whether the platinum cluster prepared in advance or the precursor salt of direct wet impregnation platinum is loaded.

The invention relates to the technical field of chemical products, and particularly discloses a preparation method of electronic-grade nitric acid. According to the method, the purified and concentrated nitric acid is filtered by using the nano modified PTFE membrane of which the surface is attached with the nano adsorbent and the interior is loaded with the diisooctyl phosphate. By improving the PTFE membrane, the operation of removing the metal ions in the method can be quickly and efficiently completed, the limitation of the removal efficiency of the metal ions on the yield of the electronic-grade nitric acid is effectively overcome, and the production efficiency of the electronic-grade nitric acid is fully improved.

The invention relates to the technical field of automobile exhaust purification and discloses a catalytic oxidation catalyst as well as a preparation method and application thereof. The invention relates to a catalytic oxidation catalyst, which comprises a carrier, a first coating and a second coating, the carrier is a regular structure carrier; the first coating comprises first cerium-zirconium composite oxide and / or first modified aluminum oxide and first precious metal, and the first precious metal is Pd and / or Pt; the second coating comprises at least one of a transition metal oxide, a second cerium-zirconium composite oxide and a second modified alumina, and a second noble metal, the second noble metal is Pd or Pt, the total amount of the first noble metal and the second noble metal is not higher than 20g / cft by element on the basis of the total amount of the catalyst, and the catalyst does not contain a molecular sieve. According to the catalyst, coating distribution is optimized based on reaction chemical characteristics in the tail gas treatment process, the effect of reducing the total content of precious metal is achieved, and wide application prospects are achieved.

The invention provides a preparation method of 2, 5-furandicarboxylic acid, and relates to the technical field of organic synthesis. The invention discloses a preparation method of 2, 5-furandicarboxylic acid, which comprises the following step: carrying out oxidation reaction on 5-hydroxymethylfurfural, piperidine nitrogen oxide, bromide, acid and halogenated isocyanuric acid in a reaction solvent to obtain the 2, 5-furandicarboxylic acid. The preparation method of the 2, 5-furandicarboxylic acid is simple and effective, the post-treatment is simple, and the 2, 5-furandicarboxylic acid with higher yield and purity can be obtained.

The invention discloses a preparation method of a composite preservative film based on stropharia rugoso-annulata, which specifically comprises the following steps: adding aldehyde modified stropharia rugoso-annulata polysaccharide, stropharia rugoso-annulata polyphenol and a plasticizer into a gelatin solution with the mass volume concentration of 1-3%, uniformly stirring and mixing, ultrasonically degassing, and drying the prepared film at room temperature to obtain the composite preservative film, the preservative film disclosed by the invention has relatively high oxidation resistance and excellent antibacterial property, and also has relatively good water vapor barrier property and mechanical property; the preservative film can effectively inhibit oxidation, inhibit microbial reproduction, delay the decay process of fresh pork and prolong the storage period of the pork; meanwhile, the adopted preparation method is easy to operate, no special equipment requirement exists, high-value utilization of the stropharia rugoso-annulata waste is achieved, and the prepared composite preservative film with the excellent oxidation resistance and antibacterial performance has a huge application market prospect in the field of fresh-keeping packaging of meat which is prone to oxidation and microorganism breeding.

The invention relates to the field of hair dyes, in particular to a hydrogen peroxide mixed solution for a hair dye and a preparation method thereof.The hydrogen peroxide mixed solution is prepared from, by mass, 68-70 parts of an aqueous phase solution, 0.4-0.5 part of a gel matrix, 24-26 parts of self-made shampoo and 5-6 parts of a hydrogen peroxide aqueous solution; according to the invention, the aqueous phase solution composed of specific buffering and curing components, the gel matrix with thickening and stabilizing effects, the mild self-made shampoo carrier and the core oxidant are precisely compounded, so that the obtained mixed solution can maintain efficient oxidation performance, and at the same time, the storage stability and the mildness during use are obviously improved; according to the present invention, with the application of the composition, the thixotropy and the smearing experience of the paste are effectively improved, the process reproducibility is good, the product quality is uniform, the organic combination of the oxidation function and the hair care function is achieved, and the composition is suitable for various oxidation type hair dyes, and has wide application prospects in home and professional hair dyeing markets.

This invention discloses a modular, controllable atmosphere high-temperature oxidation device for the recovery of substandard sponge zirconium, relating to the fields of nuclear fuel cycle and materials technology. The device includes: a furnace body system, comprising, from the outside to the inside, a steel outer shell, a refractory insulation layer, and a detachable furnace liner; multiple independently controlled heating zones arranged along the furnace body axis, each equipped with an independent heating element and thermocouple; an atmosphere control system including nitrogen and oxygen sources, an inert gas source, a mass flow controller, and a mixer; a sealing and cooling system employing a high-temperature sealing ring and a double-layer furnace shell design, with circulating cooling water flowing through the interlayer; and an automatic control system equipped with a temperature-atmosphere-time automated control program for fully automated operation and remote monitoring of the oxidation process. The device provided by this invention can achieve efficient and uniform oxidation treatment of irregular porous sponge zirconium within the range of 500-1000℃, transforming it into zirconium oxide with consistent physical properties.

The invention discloses a method for preparing mesophase pitch-based pre-oxidized fibers through electron beam irradiation. The method comprises the following steps: carrying out hydrogen peroxide spraying treatment on a mesophase pitch fiber sample, then carrying out electron beam irradiation, and alternately repeating for a plurality of times until the fiber reaches a pre-oxidation state. By means of the synergistic oxidation effect of hydrogen peroxide and the efficient cross-linking effect of electron beam irradiation, the cross-linking degree of the fibers is improved under the condition of low irradiation dose, and the pre-oxidation time is remarkably shortened. The method is easy and convenient to operate and low in energy consumption, the obtained pre-oxidized fiber has the good homogenization degree, the production cost of the carbon fiber can be effectively reduced, and the method is suitable for the technical field of pitch-based fiber precursor processing.

The invention discloses a preparation method of a PD-L1 remodeling probe, and belongs to the technical field of probe preparation. Dissolving galactose oxidase containing free sulfydryl in a phosphate buffer solution; the preparation method comprises the following steps: adding NHS-polyethylene glycol 1000-maleimide into galactose oxidase, and mildly stirring at room temperature to obtain a mixed solution; transferring the mixed solution into a dialysis membrane, and dialyzing with a phosphate buffer solution for 12-16 hours; after dialysis is completed, adding a peptide fragment, reacting at room temperature to promote the reaction of NHS ester and amino of the peptide fragment, and finally generating a peptide-polyethylene glycol 1000-galactose oxidase covalent complex; the covalent complex is analyzed through lauryl sodium sulfate-polyacrylamide gel electrophoresis, if the molecular weight of a band is increased and migration occurs, the complex is successfully coupled, and the PD-L1 remodeling probe is obtained. The PD-L1 remodeling probe prepared by the invention can be used for specifically and efficiently oxidizing galactose / N-acetylgalactosamine residues at the tail end of PD-L1 to generate aldehyde groups so as to be subjected to biological orthogonal reaction with hydrazide groups.

The application belongs to the field of experimental sample oxidation, and particularly relates to a liquid sample aeration strong oxidation device and a use method. The device comprises an air pump, an air purification device, an aeration oxidation pipe, a gas bottle, a high-voltage direct-current power supply and a reflux condenser pipe. The aeration oxidation pipe is fixed in the gas bottle, metal electrodes are arranged on the inner side of the lower part of the aeration oxidation pipe and the outer side of the bottom of the gas bottle respectively, and the two metal electrodes are connected with the high-voltage direct-current power supply. Clean air is sent into the aeration oxidation pipe through the air pump and the air purification device, and enters the liquid sample through the through hole at the bottom of the pipe. Plasma discharge is formed between the two metal electrodes, oxygen in the air is oxidized, free radicals, ozone and other active substances are generated through the plasma discharge process, and the dissolved components and suspended matters in the solution are strongly oxidized. The reflux condenser pipe cools and refluxes the volatile solvent in the sample to the gas bottle. The device has simple structure and convenient operation, and different degrees of oxidation of the liquid sample can be realized by changing the electrification time.

The present application belongs to the field of catalysts, and particularly relates to a perovskite catalyst and a preparation method thereof. The preparation method comprises the following steps: (1) adding metal ions into a deionized water solution of a chelating agent; the metal ions are a mixture of lanthanum metal ions and transition metal ions; then adding citric acid and stirring until a clear solution is obtained; (2) gradually adding an ammonia water solution into the mixed solution prepared in step (1) to adjust the pH value; (3) evaporating water from the mixed solution obtained in step (2) and then performing high-temperature calcination to obtain the perovskite catalyst. The present application provides a catalyst capable of oxidizing soot (carbon smoke) in exhaust gas at a lower temperature within the exhaust gas temperature range of a diesel engine. Mainly by regulating the type and content of the complexing agent, NO is converted into adsorbed NO2, thereby efficiently oxidizing carbon smoke.

The invention provides a potassium permanganate loaded attapulgite / silicon dioxide aerogel gas scavenger and a preparation method, and relates to the field of food preservation, the potassium permanganate loaded attapulgite / silicon dioxide aerogel gas scavenger comprises an inorganic porous composite carrier and KMnO4 loaded on the inorganic porous composite carrier; the porous inorganic composite carrier is ATP / SiO2 aerogel formed by attapulgite ATP and SiO2, and is specifically obtained by adsorbing a KMnO4 solution by ATP modified SiO2 aerogel and drying; the technical obstacle that the SiO2 aerogel and the KMnO4 cannot be directly combined due to the fact that the SiO2 aerogel is easy to reduce the KMnO4 is overcome, the reducibility of the aerogel is eliminated, the structural stability of the material is enhanced, the formability and the thermal stability of the material are guaranteed, and the KMnO4 loading capacity of the material is greatly improved.

The present invention relates to the technical field of feeds specially suitable for animals, and specifically discloses a composite fungal lipid extract, a preparation method and an application thereof in promoting the growth of fattening pigs. The composite fungal lipid extract is obtained by processing, extracting and purifying ganoderma lucidum spores, shiitake mushrooms and black fungus and then mixing them with sesamol derivatives. Adding the composite fungal lipid extract to feed can not only effectively promote the growth of fattening pigs, but also be safe and have no toxic side effects.