65 results about "Hydrogen peroxide product" patented technology

The invention relates to a hydrogen peroxide and peracetic acid mixed disinfectant and a preparation method of the disinfectant. The disinfectant is prepared by the steps of mixing hydrogen peroxide, acetic acid and sulfuric acid at the room temperature to prepare mixture containing peracetic acid and hydrogen peroxide, feeding a stabilizer and a surface active agent into the mixture containing the peracetic acid and the hydrogen peroxide, and mixing. The mixed disinfectant comprises 3-9g/ 100g peracetic acid, 20-35g/ 100g hydrogen peroxide, 5-12g/ 100g acetic acid, 0.1-2g/ 100g sulfuric acid, 0.05-2g/ 100g stabilizer, 0.05-2g/ 100g surface active agent and the balance of water. The hydrogen peroxide and peracetic acid mixed disinfectant is good in stability, is capable of rapidly killing various microorganisms such as bacteria, mould, yeast, spores and the like, and is safe, non-toxic and free from secondary pollution.

A process for preparing high-purity hydrogen peroxide from the aqueous solution of industrial hydrogen peroxide includes such steps as contacting with strong-alkaline macroreticular anionic exchange resin, contacting with strong-acidic macroreticular cationic exchange resin, contacting with mixed ionic exchange resin, and filtering via microfilter membrane. Its advantages are colourless, no order, high stability and purity, and low cost. It can be used as detergent for semiconductor chip.

The invention belongs to the technical field of organic chemical catalytic synthesis, which relates to a device and a method for performing olefin gaseous phase epoxidation by using industrial hydrogen peroxide. A reactor casing of the device is made of metal materials, the inner wall contacted with the hydrogen peroxide is passivated through acid solution, or the inner wall is coated with hydrogen peroxide inert materials. The processed raw material enters a reactor to perform reaction along with feeding materials of the olefin raw material, diluent gas, auxiliaries and the like, and after reacted materials pass through a separation unit, unreacted olefin raw material, the diluent gas and auxiliaries circulate back to the reactor. The device and the method directly use industrial hydrogen peroxide products, overcome bottlenecks of low efficiency, fast catalytic agent inactivation and poor regeneration repeatability of in-situ hydrogen peroxide preparation, are strong in raw material adaptability, safe and high in efficiency, few in gaseous phase epoxidation reactive by-product, simple in separation and high in catalyst stability.

The invention relates to a loop reaction device in a slurry bed, application and a method for producing hydrogen peroxide. The loop reaction device comprises a slurry bed reactor and a solid-liquid separator, wherein the upper part of the slurry bed reactor is communicated with the upper part of the solid-liquid separator, and the bottom of the slurry bed reactor is communicated with the bottom of the solid-liquid separator; and a coaxial inner sleeve is arranged in the slurry bed reactor, an outer sleeve is arranged between the inner sleeve and the outer wall of the slurry bed reactor at the upper part of the slurry bed reactor, a raw material inlet and a fluid distributor are arranged in the inner sleeve and at the bottom, a gas outlet is formed in the top of the slurry bed reactor, a filtration component is arranged in the solid-liquid separator, and a clear liquid outlet is formed in the wall of the solid-liquid separator via the filtration component. According to a hydrogenation method for producing hydrogen peroxide by an anthraquinone method with the adoption of the slurry bed loop reactor, the gas-liquid-solid three-phase separation efficiency is high, the excess local liquid holdup of a catalyst is avoided, the possibility of excessive hydrogenation is reduced, the hydrogenation efficiency is further effectively improved and a hydrogen peroxide product with relatively high concentration can be obtained.

The invention relates to a method for preparing 2,6-dichloro-4-nitroaniline through direct chlorination of chlorine gas and oxidative chlorination of hydrogen peroxide. The method comprises the following steps: (1) adding paranitroaniline into hydrochloric acid at the concentration of 5-35wt%, heating to 40-80 DEG C, stirring for uniformly mixing, slowly inflating the chlorine gas within 0.5-5h, slowly adding hydrogen peroxide dropwise, and after adding the chlorine gas and the hydrogen peroxide, continuing to preserve heat and react for 0.3-1.5h; (2) filtering a product obtained in the step (1), washing a filter cake to be neutral, and drying to obtain the 2,6-dichloro-4-nitroaniline. By regulating a dosage ratio of the chlorine gas to the hydrogen peroxide, the concentration of the hydrochloric acid in a reaction system can be kept unchanged, the reaction process is steady and easily controlled, and the product is high in yield and purity.

A process is disclosed for the direct catalytic production of aqueous solutions of hydrogen peroxide from hydrogen and oxygen in the presence of a small amount of one or more water soluble organic additives (about 0.1-10% by weight). Suitable catalysts include nanometer-sized noble metal catalytic crystal particles. The catalyst particles preferably have a controlled surface coordination number of 2 to increase the selectivity of hydrogen peroxide production. The water soluble additive(s) increases catalytic activity causing significant increases in the apparent first order reaction rate constant for the direct production of aqueous hydrogen peroxide.

The invention provides a continuous production process for ultra-pure hydrogen peroxide, comprising the following steps: mixing the industrial hydrogen peroxide material with the modified active carbon; then classifying filter by microfiltration membrane and ultrafiltration membrane in sequence; the filtrate is pumped into the distillation column formed by a plurality of columns connected in series; adding metal ion complexing agent into the primary column; performing reverse osmosis on the semi-finished products out of the column before filtering by nanofiltration membrane to get ultra-pure hydrogen peroxide products. The device comprises the following parts: a raw material chute, an active carbon pre-mixer, a microfiltration and ultrafiltration filter, a distillation column formed by a plurality of columns connected in series, a reverse osmosis device, a nanofilter, a finished product receiver, a pump and a shaft; wherein, the raw material chute outlet is connected with the active carbon pre-mixer inlet; the microfiltration and ultrafiltration filter outlet is connected with the pump, the outlet of which is connected with the inlet of the distillation column formed by a plurality of columns connected in series; the outlet of the distillation column formed by a plurality of columns connected in series is connected with the inlet of the reverse osmosis device, the outlet of which is connected with the shaft; the outlet of the shaft is connected with the inlet of the nanofilter, the outlet of which is connected with the finished product receiver.

The invention relates to a purification continuous production process for high-purity hydrogen peroxide, which comprises preparing technical grade hydrogen peroxide raw material, feeding into macroporous adsorption resin column through pumps, carrying out organic carbon adsorption, feeding hydrogen peroxide into separate anion and cation exchange resin columns for ion exchange, inputting the hydrogen peroxide into anionic and cationic ion-exchange resin mixing column, carrying out ion exchange again, removing detrimental ionic impurities, inputting into polyvinylidene fluoride microfilter with a bore diameter of 0.05um to 0.1um, to as to remove the impurity substance.

The invention discloses an oxidation-extraction technology for production of hydrogen peroxide by anthraquinone process. The oxidation-extraction technology for production of hydrogen peroxide by anthraquinone process comprises the following contents: (1) introducing hydrogenation liquid and oxygen-containing gas from the bottom of an oxidation-extraction reactor to carry out concurrent-flow oxidation reaction from the bottom to the top inside the reactor so as to continuously generate H2O2; (2) introducing an extraction agent through the upper middle part of the oxidation-extraction reactor while the reaction in the step (1) is carried out, letting the extraction agent flow from the top to the bottom in the reactor, and gradually extracting out the H2O2 generated by the oxidation reaction; and (3) carrying out gas-liquid separation on the material from the bottom to the top, removing residual moisture with a working solution and flowing out, settling the material from the top to the bottom in the settling section, removing the residual working solution in water, and purifying or concentrating to obtain a hydrogen peroxide product. According to the technology, the two processes of oxidation and extraction are coupled to each other. The oxidation reaction is carried out while extraction of H2O2 is conducted. Meanwhile, oxidation reaction rate and extraction efficiency are enhanced, the technological process is simplified, and the technology is beneficial to save investments and reduce energy consumption.

The invention discloses a formula and a production process for preparing methyl ethyl ketazine by utilizing a hydrogen peroxide method, which carries out an in-depth study on the hydrogen peroxide method, thereby improving the hydrogen peroxide method to form a ketazine production method suitable for the situations in China. In the method, hydrogen peroxide is used as an oxidant, ammonia and butanone (methyl ethyl ketone) are used as raw materials and formamide and an inorganic oxide are used as a catalyst and a cocatalyst respectively to interact with each other so as to prepare the ketazine, wherein the hydrogen peroxide belongs to an industrial product and has the concentration of 25% to 30%; ammonia is added in a form of ammonia water with the concentration of 20% to 25%; and the butanone, the formamide and the inorganic oxide are all in the industrial product level. The method disclosed by the invention can be used for solving the problems that the existing initial coarse products for producing hydrazine hydrate are low in concentration, high in energy consumption, low in efficiency and high in cost and the by-products are difficult to treat, thereby being suitable for the situations in China.

The present invention relates to a composition comprising a coupled enzyme system for the rapid and efficient production of hydrogen peroxide by the coupling of a first enzyme system capable of hydrogen peroxide generation, to a second enzyme system which utilizes the non hydrogen peroxide product of the first enzyme system, and optionally is capable of generating further hydrogen peroxide.

The invention discloses a high-efficiency extraction process in a hydrogen peroxide production process. According to the invention, in an extraction process of an anthraquinone method for producing hydrogen peroxide; an extraction tower I and an extraction tower II are arranged; an oxidation liquid is divided into two parts which are an oxidation liquid I and an oxidation liquid II; pure water is introduced from the top of the extraction tower I, and the oxidation liquid I is introduced from the bottom of the extraction tower I; the two phases are subjected to countercurrent extraction in the extraction tower I; raffinate is discharged from the top of the extraction tower I, and is subjected to separation in a liquid/liquid separator, such that a heavy phase and a light phase are obtained; the heavy phase is mixed with extract liquid from the bottom of the extraction tower I, and the mixture of the heavy phase and the extract liquid from the bottom of the extraction tower I is introduced from the top of the extraction tower II; the light phase is mixed with the oxidation liquid II, and the mixture of the light phase and the oxidation liquid II is introduced from the bottom of the extraction tower II; the two phases are subjected to countercurrent extraction in the extraction tower II; a tower top raffinate phase is introduced into a post-treatment process; and the tower bottom extraction liquid is the high-concentration hydrogen peroxide product. The high-efficiency extraction process provided by the invention is provided aiming at the defects of prior arts. The process has the advantages of high mass transfer rate, high Murphree efficiency, high product concentration, low raffinate content, and the like.

The invention discloses a method for purifying hydrogen peroxide, comprising the following steps: preparing heavy aromatics and trioctyl phosphate according to a volume ratio of heavy aromatics to trioctyl phosphate being 5-15 to 1into a mixed solution, then adding the mixed solution in a purification tower, and carrying out organic matter removal and purification on extracted crude hydrogen peroxide by using a conventional method at a temperature of 30-50 DEG C, wherein, the hydrogen peroxide is mixed with the mixed solution for purification according to the volume ratio of 100: 1-30. According to the invention, the quality of the hydrogen peroxide product is increased, the anthraquinone effective ingredient is recovered, and the situations that organic matters are precipitated in the device and concentrated hydrogen peroxide contains a lot of organic matters in condensation technology are improved.

A process for removing urea from an aqueous solution is disclosed herein, the process comprises the steps of: feeding an aqueous solution comprising urea into a mix tank; feeding hydrogen peroxide into the mix tank; feeding at least one soluble catalyst into the mix tank separately from the hydrogen peroxide feed; mixing the aqueous solution comprising urea, hydrogen peroxide, and the at least one soluble catalyst in the mix tank, forming a reactant mixture; and oxidizing the urea in the reactant mixture yielding CO₂, N₂, and H₂O. The soluble catalyst is selected from a group of catalysts that when mixed with the hydrogen peroxide and urea causes the rate of reaction of the oxidation of the urea by hydrogen peroxide to accelerate; such as soluble iron salts. A system configured to carry out the process for removing urea from an aqueous solution is also disclosed herein. The disclosed process and system may be added to or incorporated with existing processes and systems for treating aqueous solutions.

The invention discloses a fluidized bed hydrogenation reaction and separation process and device for producing hydrogen peroxide by virtue of an anthraquinone method. A working solution and hydrogen are continuously added into a fluidized bed reactor with a catalyst for hydrogenation reaction, reacting materials are driven by gas to upwards move to the top of a draft tube, and are downwards filtered through a membrane separator, filtered hydrogenation liquor flows to a hydrogenation liquor storage tank, and the catalyst is retained on a filter element, and returns into the reactor to continue participating in reaction through backflush operation. On the upper part of the reactor, incompletely reacted hydrogen mixed up with a small amount of working solution overflows, and returns to the reactor to participate in reaction through a circulating compressor after the working solution is separated through a circulating gas separator. During regeneration of the built-in membrane separator, an external membrane separator is adopted for separation. According to the process and the device, the raw materials and the catalyst are uniformly mixed, the reaction homogeneity is high, the utilization efficiency of the catalyst is high, and a high-concentration hydrogen peroxide product can be obtained with fewer side reactions. The device is simple in structure, and can run stably.

The invention provides methods and compositions for reducing the malodorous sulfide gas released by a wastewater treatment system. The method preserves the vitality of waste consuming organisms within the system. The method comprises the steps of: determining the SRP PAA demand of the system, determining the aerobic PAA demand of the system, and adding a composition in an amount such that it is in excess of the SRP PAA demand but is below the aerobic PAA demand. Even though the composition increases the amount of sulfates within the wastewater it reduces the amount of SRP which prevents the malodorous sulfite gas release. The composition comprises at least one percarboxyacid.

The invention discloses a novel purification process of hydrogen peroxide, belonging to the technical field of hydrogen peroxide purification. The novel purification process specifically comprises the following steps: step 1, an adsorption procedure; step 2, a separation and purification procedure; step 3, a distillation procedure; and step 4, an extraction procedure. According to the purification process for hydrogen peroxide provided by the invention, metal ions in a hydrogen peroxide solution can be well removed, the impurity content of a hydrogen peroxide product is greatly reduced, and the quality requirement for high quality is ensured; meanwhile, in a purification process, reaction stability and pyrolysis risks are relatively low, and production safety is relatively high; and moreover, ion exchange resin is low in process cost and good in economic benefit, and the purification mode combining the ion exchange resin with a reverse osmosis membrane is economical, safe and environmentally friendly, and therefore, the hydrogen peroxide purification technology can achieve large-scale industrial production.

The invention discloses a method for synchronously synthesizing hydrogen peroxide and peroxyacetic acid, wherein, hydrogen and oxygen are taken as gas sources, alcohol, water and acetic acid are taken as reaction solvent, and phosphoric acid and salt or acid which can generate Br- after being dissolved are taken as reaction assistants; and hydrogen peroxide and peroxyacetic acid can be synthesized synchronously under the conditions that the pressure ranges from 1 to 20 MPa and the temperature ranges from minus 20 to 15 DEG C. The mixed solution that is prepared according to the method can be used as raw material for preparing compound disinfectant and bleaching agents and can also be used as intermediates for other chemical synthesis.

The invention discloses a system and method for producing hydrogen peroxide through an anthraquinone method. The system comprises the four unit processes of hydrogen dissolving, hydrogenation, oxidation and extraction, wherein a hydrogenation unit comprises a series fixed bed and upflow-type tubular reactors, and working liquid and hydrogen are subjected to a hydrogenation reaction in the hydrogenation unit to obtain hydrogenation liquid; an oxidation unit comprises an oxidation tower, the hydrogenation liquid and oxygen-containing gas are subjected to an automatic oxidation reaction to obtainoxidation liquid; and an extraction unit comprises an extraction tower, hydrogen peroxide in the oxidation liquid is extracted by the water, and thus a high-concentration hydrogen peroxide product isobtained. According to the system and method, the anthraquinone hydrogenation reaction rate can be significantly improved, the anthraquinone hydrogenation reaction efficiency can be significantly improved, the uniformity of the reaction process is maintained, side reactions are less, the obtained hydrogenation liquid is good in quality, small in by-product number and low in viscosity, the gas-liquid mass transfer rate in the oxidation process is increased, the extraction efficiency in the extraction process is improved, the oxidation time is significantly shortened, and the number of actual tower plates of the extraction tower is decreased.