134 results about "Peroxydisulfuric acid" patented technology

The invention discloses a nano-confinement zero-valent iron@spindle type porous carbon catalytic oxidation water treatment method. In-situ coupling of graphite phase carbon nitride (g-C3N4) with a metal-organic framework enhances the confinement effect of the metal-organic framework on the basis of retaining the original framework structure. Nano-confinement zero-valent iron@spindle type porous carbon can be used as a catalytic oxidation water treatment catalyst to activate monopersulfate, peroxodisulfate and hydrogen peroxide in order to achieve efficient degradation of non-degradable organicpollutants in water, and the catalyst is easy to recover, and can be reused. The catalyst has a small use amount and a short reaction time. The method has the advantages of simplicity and conveniencein operation, realization of uniform dispersion of nano-iron particles in the carbon frame, and good application prospect in the field of catalytic oxidation water treatment.

A sugar-containing hydrolyzate is produced from a lignocellulose-containing material by a) pretreating the lignocellulose-containing material with a chemical compound selected from sulphuric acid, alkali, peroxodisulphates, potassium peroxide, potassium hydroxide, and mixtures thereof, in the presence of water, thereby obtaining an aqueous phase, and b) after removing of the aqueous phase and washing the resulting product, treating said product with an enzyme suitable for hydrolysis in the presence of water, thereby obtaining a hydrolyzate, the hydrolyzate being suitable as a carbon source for fermentation.

The invention provides a preparation method for a foaming type nutrient composite water-retaining agent and belongs to the field of composite materials. Plant ash, acrylamide and palygorskite clay rude ore are adopted as raw materials, potassium persulfate is adopted as an initiating agent, N,N'-methylene-bisacrylamide and the like are adopted as cross-linking agents, ammonium bicarbonate is adopted as a foaming agent, the copolymerization of an aqueous solution is initiated through a free radical to obtain the composite water-retaining agent which has the effects of high water absorption velocity, large water absorption capacity, long water retaining time, good salinity tolerance and high gel strength. Through the addition of the natural fertilizer plant ash, the water-retaining agent isendowed with the advantage of being rich in nutrient elements, thereby being more suitable for the fields of crop planting and desertification environment remediation. The palygorskite clay rude ore is adopted as the main raw material, the addition of inorganic substances is high, so as to greatly reduce the cost of the water-retaining agent; besides, the preparation technology of the composite water-retaining agent is simple, the operation is convenient, and industrialization is facilitated.

The invention relates to a method for producing sulfate radical free radicals to oxidize pollutants through in-situ electrocatalysis. The method comprises the steps: sulfate in wastewater is activatedin situ by an anode material with high oxygen evolution potential to generate persulfate radicals, the generated persulfate radicals are catalyzed into sulfate radical free radicals at a cathode material with electrocatalytic activity, pollutants in the wastewater are oxidized by the sulfate radical free radicals and the sulfate radical free radicals are converted into sulfate at the same time, the sulfate are activated at the anode material again, and the processes are repeated. Compared with the prior art, the method has the advantages that sulfate ions in the water body are used for generating the sulfate radical free radicals in situ to oxidize and remove the pollutants, oxidants (such as peroxymonosulfate and peroxydisulfate) do not need to be added, and the salt concentration of thewater body cannot be increased; the water pollution control technology is high in removal efficiency and small in secondary pollution, and has the characteristic of easiness in automation.

The invention discloses a chitosan derivative which is prepared by taking dipotassium sulphate-sodium bisulfite as initiating agent to carry out graft copolymerization to chitosan, acrylamide and acrylic acid, and the materialization indexes of the chitosan derivative are as follows: pale yellow powdered solid is dissolved into acetic acid, and the molecular weight is 50 to 70 KD; and the removal ratios of the chitosan derivative to complexing state Cu2+, Pb2+ and Zn2+ with the concentration of 10mg/L reach 91.9 percent, 98.2 percent and 99.0 percent respectively. The chitosan derivative provided by the invention overcomes the defects of small chitosan molecular mass, poor bridge erecting bridge erecting and high using cost, has better removing capability than chitosan to the three complexing state ions, and can be used as flocculating agent for removing CU2+, Pb2+ and Zn2+ in waste water.

The invention discloses a nano zero-valent iron modified porous cobaltosic oxide heterogeneous persulfate catalyst, and a preparation method and an application thereof. The preparation method for synthesizing the porous cobaltosic oxide heterogeneous persulfate catalyst by using a nano zero-valent iron modified yeast template technology comprises the following steps: firstly, synthesizing cobaltosic oxide microspheres with high specific surface area and porosity in a high-temperature environment by using Saccharomyces cerevisiae as a biological template; and loading nano zero-valent iron on the surface by an in-situ chemical reduction technology. The synthesized final catalyst is a heterogeneous iron-cobalt bimetallic composite material, and can effectively catalyze peroxydisulfate, whichhas a symmetrical structure and is difficult to activate, through the synergistic circulation effect between ions with different valence states of cobalt and iron. A generated active free radical group (SO4<.->/.OH) can quickly and efficiently attack tetracycline molecules of antibiotics, and finally mineralize the tetracycline molecules into carbon dioxide and water molecules, so that the catalyst has certain practical application values.

The invention discloses a preparation method of tannin-based adsorbent resin. The method comprises the following steps: (1) synthesis of a copolymer: by taking potassium peroxydisulfate as an initiator, reacting sodium methallyl sulfonate with acrolein to obtain the copolymer; and (2) synthesis of the tannin-based adsorbent resin: carrying out phenolic aldehyde condensation reaction between an aldehyde group in the copolymer and a phenol ring in the tannin molecular structure to prepare the tannin-based adsorbent resin in a crosslinking manner, and introducing a sulfonic acid group to the tannin molecular structure to improve the adsorptive property. The invention provides the novel preparation method of the tannin-based adsorbent resin, and has the characteristics of few reaction steps, simplicity in operation and low cost. The obtained tannin-based adsorbent resin is strong in adsorption capacity, insoluble in water and reproducible, has a strong adsorption capacity to lead ions, and can be used for wastewater treatment.

The invention relates to an organic framework derived nitrogen-carbon nano-material as well as a preparation method and application thereof. According to the preparation method, an organic framework material ZIF-8 is used as a precursor and is subjected to annealing treatment for 3 h through a nitrogen gas atmosphere at 600 to 1100 DEG C so as to obtain the organic framework derived nitrogen-carbon nano-material. When the organic framework derived nitrogen-carbon nano-material is applied to wastewater treatment, a certain amount of the nitrogen-carbon material is used as a peroxydisulfate activating agent and is added into a beaker, and is magnetically stirred to degrade organic matters in wastewater. Compared with the prior art, the nano-material provided by the invention has the advantages that the size is small, the dispersity in a water solution system is good, a peroxydisulfate activating process is simple to operate, no metal is dissolved out, the repeated utilization performanceis stable and an applicable pH (Potential of Hydrogen) range is wide, and the nano-material has a wide prospect in industrial wastewater treatment.

The invention provides a method for treating organic wastewater through catalytic activation of persulfate by utilizing iron oxychloride. The method comprises the following steps: adding iron oxychloride into organic wastewater, and carrying out an adsorption reaction so as to obtain a mixture; and adding persulfate into the mixture, wherein the persulfacte is subjected to catalytic activation by iron oxychloride so as to produce sulfate radicals for degrading the organic wastewater. According to the method disclosed by the invention, the persulfate serves as an oxidizing agent and is subjected to efficient catalytic activation so as to produce the sulfate radical SO4<.->; by utilizing the catalyst iron oxychloride, the sulfate radical has high redox ability and has long existing life in aqueous solution, the decay time is 4 seconds, and the stability of the oxidizing agent is high, so that a majority of organic pollutants can be completely degraded, and the performance of the iron oxychloride is stable. Meanwhile, the invention further provides a novel thought of treating pollutant effluents by persulfate.

The invention discloses a method for treating sewage by combining nitrogen-doped sludge biochar and peroxydisulfate, which is characterized by comprising the following steps of: taking back sludge, standing until mud-water separation, pouring out supernate, carrying out suction filtration on the sludge, drying to constant weight, mixing the sludge with nitrogen-containing organic matters, pyrolyzing in a tube furnace in a nitrogen atmosphere, taking out, washing with clear water to be neutral, and drying to obtain biochar; and simultaneously adding the biochar and the peroxydisulfate into the sewage containing the organic pollutants and the heavy metals at normal temperature and normal pressure, and continuously stirring the whole system to remove the organic pollutants and the heavy metals in the sewage . The nitrogen-doped sludge biochar can efficiently activate peroxydisulfate after high-temperature pyrolysis, can react with most of organic pollutants and remove heavy metal, and is high in reaction rate and low in influence of pH in water.

The invention discloses a preparation method of potassium peroxymonosulfate. The preparation method comprises following steps: adding a potassium peroxydisulfate solution into a hydrolysis reactor, carrying out hydrolysis under the action of a catalyst to generate potassium peroxymonosulfate and potassium hydrogen sulfate; after the hydrolysis degree reaches the requirement, removing the catalystfrom the solution by a filter, adding the solution into a neutralization reactor, adding a stabilizing agent into the neutralization reactor, then adding potassium hydrogen sulfate solids, stirring, mixing; then adding potassium hydroxide into the neutralization reactor to carry out neutralization reactions; carrying out vacuum concentration, cooling, crystallizing, performing centrifugal separation, and baking to obtain a dry product of potassium peroxymonosulfate. Potassium peroxydisulfate is used to replace high concentration hydrogen peroxide, reacts with fuming sulfuric acid, and is hydrolyzed to generate potassium peroxymonosulfate and potassium hydrogen sulfate under the action of a catalyst; the reactions are mild, the reaction heat is little, the danger of reactions is reduced effectively; under the action of the catalyst, the degree of directional hydrolysis is high, the active oxygen content of products is qualified, and the product quality is stable.

The invention discloses a method of removing oxide film formed on a surface of a copper or copper-base alloy of the related art, after oxide film is removed in a pickling bath, it is difficult to electrolyze a pickling solution containing the oxide film in an electrolytic bath and efficiently recover a high-purity copper or copper-base alloy capable of being reused as a recycled material having superior handleability, and furthermore it is also difficult to return the electrolyzed pickling solution to the pickling bath for reuse. A pickling solution, including: 50 g/L to 400 g/L of sulfuric acid; 1 g/L to 100 g/L of at least one oxidant selected from a group consisting of nitric acid, hydrogen peroxide, peroxodisulfate ions, and iron (III) ions; 0.01 g/L to 10 g/L of at least one additive selected from a group consisting of aromatic sulfonic acid, aromatic sulfonate, alkylamine, aromatic carboxylic acid, and aromatic carboxylate; 0.005 g/L to 10 g/L of at least one surfactant selected from a group consisting of alkylbenzene sulfonic acid and alkylbenzene sulfonate; and 10 g/L to 300 g/L of copper sulfate, is used to remove oxide film, and then reused by being electrolyzed and adding the oxidant, the additive and the surfactant in amounts equivalent to consumed amounts.

This invention provides a liquid composition that removes titanium nitride from a substrate without corroding tungsten or a low-k interlayer dielectric also present on said substrate. Said liquid composition has a pH between 0 and 4, inclusive, and contains the following: at least one oxidizing agent (A) selected from the group consisting of potassium permanganate, ammonium peroxodisulfate, potassium peroxodisulfate, and sodium peroxodisulfate; a fluorine compound (B); and a tungsten-corrosion preventer (C). The tungsten-corrosion preventer (C) either contains at least two different compounds selected from a group of compounds (C1) consisting of alkylamines, salts thereof, fluoroalkylamines, salts thereof, and the like or contains at least one compound selected from said group of compounds (C1) and at least one compound selected from a group of compounds (C2) consisting of polyoxyalkylene alkylamines, polyoxyalkylene fluoroalkylamines, and the like. The mass concentration of potassium permanganate in the abovementioned oxidizing agent (A) is between 0.001% and 0.1%, inclusive, and the mass concentration of the abovementioned fluorine compound (B) is between 0.01% and 1%, inclusive.

Methods for preparing oxidizing agents having enhanced water solubility properties, such as magnesium permanganate, calcium permanganate and ammonium peroxydisulfate are prepared from oxidizing agents having more limited water solubility properties, such as potassium permanganate and potassium peroxydisulfate by electrochemical means employing oxidant stable, cationic permselective ion-exchange membranes that are also suitable for transporting a preponderance of cations with lower water of hydration, such as potassium over other more highly hydrated cations, such as sodium, magnesium and calcium used to replace the leaving potassium ion, and form more soluble oxidizer salt solutions. The methods may be practiced in multi-compartmentalized electrolytic cells, such as metathesis electrodialysis cells. The methods of the invention are also more attractive economically over previous technologies by simultaneously generating a value-added co-product without costly reagents, while avoiding the disposal of unwanted waste by-products, and the like.

The invention discloses a method for degrading environmental hormone bisphenol A in water based on ferric sulfide activated persulfate and belongs to the technical field of degradation of environmental organic pollutants. According to the method, ferric sulfide is used as an activation agent, persulfate (including persulfacte and peroxymonosulfate) is used as an oxidizing agent, single or composite organic pollutants in the water are degraded, the removal rate of hormone bisphenol A reaches above 95%, and the highest removal rate of hormone bisphenol A can reach 98%. According to the method, the reaction conditions can be conducted at the normal temperature and pressure, materials can be recycled through magnetic force, the application pH range is wide, the efficiency is high, and the method is environmentally friendly. Meanwhile, chloride ions, with high concentration, in the water have little influence on pollutant degradation through ferric sulfide activated persulfate. According tothe method, the applied material cannot cause secondary pollution, additional energy such as light and ultrasound does not need to be provided, the energy is saved, and the method is easy and convenient to operate and easy to popularize. Therefore, the method has wide application prospects in the aspect of organic pollutant repairing of the water.

A detergent and disinfectant in which water-soluble permanganates are used in an alkaline solution in order to initiate the oxidation of organic substances and simultaneously a chemical oxidant, preferably a peroxodisulfate, is used which is capable of producing radical reactions with catalytic support by manganates originating from the supplied permanganate, which reactions produce the oxidation of organic substances. All components are present in powder form and a respective powder mixture can be dissolved rapidly and free from residues in water. It thus represents a universally applicable, highly effective detergent and disinfectant.

The invention discloses an oxidation method for removing antibiotic resistance genes and resistant bacteria in sewage, and relates to the technical field of advanced sewage treatment. The oxidation method comprises following steps: taking sewage, adding an oxidant, and carrying out an ultraviolet irradiation treatment. A novel advanced oxidation process is adopted, UV is used for activating peroxymonosulfate/peroxydisulfate to generate sulfate free radicals (SO4.-) and hydroxyl free radicals (.OH), and ARGs and ARB are removed through free radicals with high oxidation capacity and damage of UVto bacteria. The advanced oxidation process is environmentally friendly and high in oxidation capacity, does not generate any intermediate pollutant, and has a good removal effect on ARB and ARGs.

The invention discloses water-absorbing resin dry glue powder and application thereof in demulsification of oil-water emulsion. The dry glue powder is prepared from the following raw materials in percentage by weight: 10-40% of acrylic acid, 5-20% of sodium hydroxide, 0.5-8% of N-methylolacrylamide, 0.5-5% of ammonium peroxydisulfate, 0.5-2% of sodium sulfite and the balance being water; all the raw materials, except acrylic acid, are prepared into a water solution, a sodium hydroxide water solution reacts with acrylic acid, the neutralization degree is controlled to be 60-85%, then the solution of N-methylolacrylamide, ammonium peroxydisulfate and sodium sulfite is added to react at the temperature of 50-80 DEG C to produce hydrogel; and the hydrogel is cut into small pieces and dried ina drying oven, and the dried hydrogel pieces are smashed into the water-absorbing resin dry glue powder. The water-absorbing resin dry glue powder is added in emulsion and can spontaneously absorb water to expand through mechanical stirring so as to dehydrate the emulsion and realize demulsification. The water-absorbing resin dry glue powder is simple to prepare and easy for industrial production; dehydration and demulsification operations are convenient to implement and have low equipment requirement; and a water-absorbing material has high dehydration capability and is easy to separate and recycle, and can be recycled.

The invention discloses a preparation method of a high-performance polyolefin composite battery separator and a lithium-sulfur battery, and belongs to the technical field of a method or a device for converting chemical energy into electric energy. The preparation method comprises the following steps of: (1) cutting the polyolefin separator into a circular pieces; 2, immersing 5 pieces of polyolefin membrane into concentrated nitric acid or a mixed solution composed of hydrogen peroxide and potassium persulfate solution, and continuously performing stirring to carry out oxidation; 3) mixing ethanol and deionized wat according to a volume ratio of 1: 1 to obtain a mixed solvent; (4) adding the transition metal salt into the mixed solvent prepared in the step (3), and continuously performingstirring to fully dissolve the salt; (5) immersing the treated diaphragm in the step (2) into the transition metal salt solution prepared in the step (4), adding hydrosulfuric acid drop by dropping, and continuously stirring to graft the transition metal sulfide onto the active site of the diaphragm; (6) cleaning and drying to obtain modified polyolefin membrane in six steps. The surface polarityof the polyolefin separator and the rate performance of the battery can be greatly improved by this method.

The invention relates to the technical field of preparation processes of aromatic pyridine derivatives, and in particular relates to a direct aromatization process of a pyridine derivative. The process comprises the following flows of adding the pyridine derivative, arylboronic acid, ferrite and trifluoroacetic acid to a flask in sequence, stirring the mixture uniformly at room temperature, adding persulfate, continuing stirring, and filtering, extracting, concentrating and separating the obtained product after reaction is completed, thus obtaining the aromatized pyridine derivative. The direct aromatization process has the beneficial effects that ferrite is adopted as a catalyst, persulfate is adopted as an oxidant, arylboronic acid is promoted to generate aryl free radicals in the persulfate radical and ferrous oxide ion reaction process, and the aryl free radicals are added to the pyridine derivative, thus obtaining the corresponding product; the direct aromatization process is relatively low in production cost and relatively high in reaction yield, and is suitable for popularization and use.

The invention relates to a process for treating a methyl mercaptan smelly gas continuously as per an oxidation method through chemical absorption. More specifically, on the reaction conditions of the normal pressure and the normal temperature, an alkali liquid with the pH higher than 12 is used for absorbing the methyl mercaptan smelly gas, and simultaneously, peroxydisulfate is used for oxidizing removal. The process has the advantages that the methyl mercaptan smelly gas which is hard to dissolve and process in a smelly gas is processed by the aid of the advantages of absorption and oxidizing removal of the alkali liquid, methyl mercaptan can be oxidized fully and is not shifted, the peroxydisulfate in the solution is decomposed in the alkali liquid, the decomposition rate is very slow, no secondary pollution is produced, a reaction system can keep continuous air suction and can be recycled continuously, reactions are conducted on the reaction conditions of the normal pressure and the normal temperature, reaction conditions are mild, the operation is simple, and the processing effect is good.