167results about "Peroxy compound preparation" patented technology

The present invention relates to the technical field of tert-butyl hydroperoxide, and discloses a tert-butyl hydroperoxide processing homogeneous reaction kettle, the tert-butyl hydroperoxide processing homogeneous reaction kettle comprises a homogeneous reaction kettle body, a material inlet and a connection port, the material inlet and the connection port are arranged at the top of the homogeneous reaction kettle body, and a mixing mechanism is arranged in the homogeneous reaction kettle body, a heating mechanism is arranged on the outer side of the homogeneous reaction kettle body, a mixing mechanism comprises a driving motor, a connecting rod, a supporting rod, a stirring plate and a guide groove, and the driving motor is mounted in the middle of the top of the homogeneous reaction kettle body. According to the homogeneous reaction kettle for processing the tert-butyl hydroperoxide, tert-butyl hydroperoxide reactant mixed liquid is stirred by the stirring plate and the guide groove, so that the mixed liquid can move upwards or downwards, the reactants of the tert-butyl hydroperoxide can be comprehensively mixed, and the reactants of the tert-butyl hydroperoxide react more thoroughly; impurities in the tert-butyl hydroperoxide are reduced, and the quality of the tert-butyl hydroperoxide is improved.

The present invention relates to a method for obtaining disinfection and / or sterilisation solutions from a mixture of an alcohol and a dialkyl carbonate. Said mixture is placed in contact with O2 to obtain hydrogen peroxide (H2O2) by means of a photocatalytic reaction, followed by treatment of the resulting mixture with a catalyst to obtain peroxycarboxylic acid and final dilution with water. The present invention also relates to a system for carrying out the process continuously, as well as the preparation on demand of the active disinfection and / or sterilisation solution obtained using same.

The invention belongs to the technical field of medical analysis, and particularly relates to a method for separating chemical components in hemsley rockvine root. According to the present invention, various chromatography methods are adopted to carry out separation and purification, such that sitroside (I), vanillyl glycolII (II), 5-hydroxymaltol (III), vanillic acid (IV), afzelin (V), 2, 3-dihydroxypyrazole (9E, 11E)-13-hydroxypyrazole (9, 11-dienoate), and 2, 3-dihydroxypyrazole (10E, 12E)-9-hydroxypyrazole (10, 12-dienoate) are obtained from hemsley rockvine root. Wherein the compounds II, III, VI and VII are separated from the hemsley rockvine root for the first time, and development and quality control of the hemsley rockvine root medicinal material are facilitated.

The application discloses a composite catalyst and application thereof in synthesis of alkyl peroxide. The composite catalyst comprises a molecular sieve main catalyst with medium Brnsted acidity and a Lewis acid cocatalyst supported by a non-acid carrier. The composite catalyst provided by the application has the advantages of high activity, high reaction selectivity and long-term stability in the reaction for synthesizing alkyl peroxide.

The application belongs to the technical field of chemical synthesis, and particularly relates to a preparation method of diisopropyl peroxydicarbonate and application of the diisopropyl peroxydicarbonate. The preparation method comprises the following steps: firstly, isopropyl chloroformate and an ester-soluble organic solution are added into a three-necked flask, stirring is started, hydrogen peroxide solution is added, when the temperature of the mixture in the flask is stabilized at-5 DEG C, sodium hydroxide solution is slowly added into the three-necked flask, and the time and temperature in the reaction process are controlled; finally, the organic phase is separated, washed with water, dried with anhydrous sodium sulfate, and obtained. The preparation method is safe and controllable, the yield of the diisopropyl peroxydicarbonate is high, the stability is good, the diisopropyl peroxydicarbonate can be directly used for the preparation of polyvinylidene fluoride, a chain transfer agent is not needed, polymerization can be carried out under low-temperature conditions, the molecular chain regularity of the polyvinylidene fluoride is improved, abnormal structures are few, the crystallinity is high, and the comprehensive performance is good.

The invention belongs to the technical field of acyclic compounds, and particularly relates to a preparation method of tert-butyl peroxymaleate. Adding a tert-butyl hydroperoxide aqueous solution into deionized water, mixing, stirring and cooling to obtain a mixed solution; under a stirring condition, sequentially adding liquid caustic soda and sodium nitrate into the mixed solution, and continuing to stir and react after the liquid caustic soda and the sodium nitrate are added to obtain a reaction solution I; under the stirring condition, maleic anhydride is added into the reaction liquid I, stirring reaction continues after adding is completed, and reaction liquid II is obtained; under the stirring condition, acid is added into the reaction liquid II, stirring reaction continues after adding is completed, and reaction liquid III is obtained; adding deionized water into the reaction liquid III for washing, and performing suction filtration to obtain a tert-butyl peroxymaleate crude product; and washing and drying the tert-butyl peroxymaleate crude product to obtain the tert-butyl peroxymaleate. No organic solvent is added, the method is environmentally friendly, the cost is saved, and meanwhile the product yield can be increased to 93% or above.

The application relates to the field of thermal catalysis, and discloses a method for preparing 1-cyclohexylbenzene hydrogen peroxide by solvent-free thermal catalytic selective oxidation of cyclohexylbenzene with molecular oxygen. The method uses a metal bromide as a catalyst, azobisisobutyronitrile or t-butyl hydroperoxide as an initiator, and pure oxygen as an oxidant, and can effectively selectively oxidize cyclohexylbenzene (CHB) into 1-cyclohexylbenzene hydrogen peroxide under normal pressure, solvent-free conditions and at a temperature above 90 DEG C. The catalytic system has the advantages of low cost, simple operation process, high catalytic oxidation efficiency and high selectivity of the target oxidation product.

This invention discloses a method for preparing tert-butyl benzoate peroxide using a microchannel reactor, comprising the following steps: adding liquid alkali to tert-butyl hydroperoxide, allowing it to stand and separate into layers, and obtaining the lower sodium salt; passing the obtained sodium salt into the microchannel reactor, simultaneously passing benzoyl chloride into the microchannel reactor for mixing and reaction; passing the material emanating from the microchannel reactor into an RTB reactor for incubation and reaction to obtain crude tert-butyl benzoate peroxide; purifying the crude tert-butyl benzoate peroxide to obtain tert-butyl benzoate peroxide. This invention employs continuous feeding and achieves the synthesis reaction through a microchannel reactor, reducing the reaction time from several hours to tens of seconds to several minutes, significantly improving reaction efficiency. The entire reaction process in the microchannel reactor used in this invention is a continuous reaction, which is safe and environmentally friendly, has high production efficiency, requires a small equipment footprint, is simple to operate, reduces manual operation, and lowers production costs.

ELIMINATION OF IMPURITIES WITHIN AN ORGANIC PEROXIDE The present invention relates to the use of a zeolitic adsorbent material, to purify organic peroxides, and more particularly to eliminate the impurities present in these compositions of organic peroxides.

This invention belongs to the field of acyclic compound synthesis technology, specifically relating to a production process for 1,1-dimethyl-3-hydroxybutyl hydrogen peroxide. The production process includes the following steps: (1) preparing a metal salt solution A; preparing a solution B from 1,3,5-tris(4-carboxyphenyl)benzene; oxidizing carbon nanotubes to form carbon oxide nanotubes, and then preparing a suspension from molecular sieves, metal oxides, and carbon oxide nanotubes; (2) adding solution B to the suspension, continuing to add solution A for reaction, and after post-treatment, obtaining a catalyst precursor; (3) calcining the catalyst precursor in an inert atmosphere to obtain a catalyst; (4) activating the catalyst to catalyze the reaction of 2-methyl-2,4-pentanediol and hydrogen peroxide to obtain 1,1-dimethyl-3-hydroxybutyl hydrogen peroxide. This invention further improves the selectivity and yield of 1,1-dimethyl-3-hydroxybutyl hydrogen peroxide by designing the catalyst.

To provide a process for preparing a peroxyester or peroxycarbonate with improved storage stability and reduced hydroperoxide content.SOLUTION: The present disclosure relates to a process for preparing a peroxyester or peroxycarbonate comprising: a) reacting an organic hydroperoxide with an acid halide, an acid anhydride, or a haloformate, in the presence of a base, b) separating an aqueous layer after completion of step a), c) adding a reducing agent to an organic layer after the aqueous layer has been separated in step b), wherein the reducing agent is an agent capable of reducing the organic hydroperoxide to the corresponding alcohol, d) ensuring that the mixture of step c) has a pH of greater than 6.8 by maintaining or increasing the pH of the mixture of step c), and e) maintaining the pH of greater than 6.8 for at least 5 seconds.SELECTED DRAWING: None

The application discloses a preparation method of dibenzoyl peroxide, and relates to the technical field of organic peroxide preparation. The preparation method comprises the following steps: preparing dibenzoyl peroxide crude product and initial synthesis obtained recycling mother liquor; taking out two parts from the initial synthesis obtained recycling mother liquor, and reacting with a sodium hydroxide solution, hydrogen peroxide, a surfactant aqueous solution and benzoyl chloride; at least the benzoyl chloride is contained in the multiple materials, and the multiple materials are pre-mixed by a pre-mixer; heat preservation reaction is carried out, and after the reaction is completed, centrifugal separation is carried out to obtain the dibenzoyl peroxide crude product and second synthesis obtained recycling mother liquor; and the dibenzoyl peroxide crude product is sequentially subjected to water washing and solid-liquid separation to obtain a finished product. The pre-mixer is used to realize instant super-uniform mixing of the materials, the reaction is more uniform, the product is fine and small in particle size, the particle size distribution is uniform, the reaction yield is high, the amount of water used for subsequent washing is reduced, the recycling of the mother liquor reduces the discharge amount of high-salinity organic waste liquid from the source, and the preparation cost is reduced.

The invention discloses a cross-linking agent, a preparation method, a cross-linked polyethylene cable material and a cable, and relates to the technical field of cross-linking agents. The invention provides a cross-linking agent for cross-linking polyethylene. The cross-linking agent is a peroxide cross-linking agent with carbon-carbon double bonds at the tail end of a molecular structure. As the tail end of the molecular structure of the peroxide cross-linking agent provided by the invention has a carbon-carbon double bond, the peroxide cross-linking agent provided by the invention has the characteristics of high cross-linking reaction speed, short cross-linking time and few cross-linking byproducts when being used for cross-linking polyethylene, so that a cable with good use stability can be obtained; and moreover, the production efficiency of the high-voltage cable can be effectively improved, the cable degassing time is shortened, the cable degassing energy consumption is reduced, and the production cost is saved.

The present disclosure relates to organic peroxide formulation comprising at least one organic peroxide; and at least one unsaturated scorch retarder having the structure of general formula (I): wherein, R1 is selected from OH, O-R5, or a saturated or unsaturated, linear, branched, or cyclic C1 to C8 alkyl group; R2 is on each occurrence independently selected from H or a saturated or unsaturated, linear or branched C1 to C8 alkyl group; R3 is on each occurrence independently selected from H, O-R6, or a saturated or unsaturated, linear or branched C1 to C8 alkyl group; R4 is on each occurrence independently selected from OH, O-R6, or a saturated or unsaturated, linear or branched C1 to C8 alkyl group; R5 is selected from a saturated or unsaturated, linear or branched C1 to C8 alkyl group or -[CH2]n-OCOCR4CR2R3; R6 is on each occurrence independently selected from a saturated or unsaturated, linear or branched C1 to C8 alkyl group; and n is from 2-8, with the proviso that one but not both of R2 and R3 are H, or wherein R1 and R2 are joined to form a 5, 6, or 7 membered ring, said ring being formed of atoms selected from C, O, and S and containing one or two carbon-carbon double bonds and one or two carbonyl groups, said ring being optionally substituted with one or more saturated or unsaturated, linear or branched C1 to C8 alkyl groups; R3 is H; and R4 and R6 are as described above, or wherein R3 and R4 are joined to form a 5, 6, or 7 membered ring, said ring being formed of atoms selected from C, O, and S and containing one or two carbon-carbon double bonds, said ring optionally substituted with one or more saturated or unsaturated, linear or branched C1 to C8 alkyl groups; R2 is H; and R1, R5, R6 and n are as described above.

The application provides a synthesis method of di-(3,5,5-trimethylhexanoyl) peroxide and an equipment for implementing the synthesis method. The method comprises the following steps: conveying an alkaline solution, a hydrogen peroxide solution and a 3,5,5-trimethylhexanoyl chloride solution into a micro-mixer, mixing the solutions, and then feeding the mixed solution into a micro-reactor to perform a preliminary reaction, so as to obtain a first oil-water mixture; transferring the first oil-water mixture into a reaction kettle to continue the reaction, so as to obtain a second oil-water mixture; performing liquid separation treatment on the second oil-water mixture, and obtaining an oil phase; performing post-treatment on the oil phase, so as to obtain di-(3,5,5-trimethylhexanoyl) peroxide. By taking the micro-mixer and the micro-reactor as the core to prepare di-(3,5,5-trimethylhexanoyl) peroxide, local heat accumulation can be controlled through fast heat removal, the risk of combustion and explosion of thermally unstable organic peroxide can be reduced, the contact area between the oil phase and the water phase can be increased, the reaction rate can be increased, and the production efficiency can be greatly improved.

The application belongs to the technical field of chemical product production, and particularly relates to a catalyst composition and a method for preparing peroxy acid. The catalyst composition contains an acidic catalyst and a stabilizer, wherein the stabilizer is a nitrogen-containing alkaline compound with a lone pair of electrons on the N atom. The specific catalyst composition can be used to prepare peroxy acid, and the conversion rate of hydrogen peroxide is greater than 95%, the selectivity of the prepared peroxy acid is greater than 70%, and the final obtained peroxy acid product is used to prepare caprolactone, so that the conversion rate of cyclohexanone is greater than 95%, and the selectivity of the prepared caprolactone is greater than 95%.

The photochemical synthesis method for preparing the solid hydrogen peroxide compound comprises the following steps: (1) loading a benzyl compound and a salt, an acid or urea into a reactor and introducing oxygen or air to form a reaction system, irradiating the reaction system with a light source containing ultraviolet light, controlling the reaction temperature to be between room temperature and 60 DEG C, and allowing the reaction to proceed for at least 10 minutes; and (2) crystallizing, separating and drying the liquid system containing the hydrogen peroxide compound to obtain the solid hydrogen peroxide compound. The present application provides a new technical solution for preparing the solid hydrogen peroxide compound. The method is simple and safe, and overcomes the defects of the reaction mechanism of the photocatalyst system.

The application belongs to the field of catalysts and preparation thereof, and particularly relates to a catalyst, a preparation method and a method for preparing peroxy acid. The catalyst comprises modified molecular sieves and heteropoly acid supported on the modified molecular sieves, wherein the surface of the modified molecular sieves is modified with alkyl and amino groups. When the catalyst is used to prepare peroxy acid, the conversion rate of organic acid can be improved, the equilibrium conversion rate is higher than 60%, the selectivity of the prepared peroxy acid is higher than 98%, and the catalyst can be recycled and reused, and is suitable for industrial production.

The application belongs to the technical field of crosslinking agents, and particularly relates to a strong-stability crosslinking agent BIPB and a preparation method thereof. The strong-stability crosslinking agent BIPB is prepared from the following raw materials in parts by weight: 20-30 parts of t-butyl hydroperoxide, 5-10 parts of BaSO4 / 4A zeolite composite material, 0.1-2 parts of polypropylene, 10-20 parts of a,a'-dihydroxy-1,3-diisopropylbenzene, 40-70 parts of acetic anhydride, and 0.1-2 parts of poly-4-methyl-1-pentene. In the preparation of the crosslinking agent BIPB, the BaSO4 / 4A zeolite composite material is introduced, so that the strong stability of the crosslinking agent BIPB is increased. The existence of BaSO4 affects the specific surface area and pore size distribution of 4A zeolite, thereby improving the activity of the crosslinking agent, accelerating the crosslinking reaction. The compounding of BaSO4 and 4A zeolite improves the dispersibility of BaSO4 and promotes the uniform distribution of the crosslinking agent BIPB.

The present invention relates to the use of a zeolitic adsorbent material for purifying organic peroxides, and more particularly for removing impurities present in these organic peroxide compositions.

The invention belongs to the technical field of acyclic compounds, and particularly relates to a preparation method of tert-amyl peroxyacetate. Adding a tert-amyl hydrogen peroxide aqueous solution into a solvent, and stirring to obtain a mixed solution; under the stirring condition, p-toluenesulfonic acid and iron phosphide are sequentially added into the mixed solution, stirring reaction continues after adding is completed, and reaction liquid I is obtained; under the stirring condition, acetic anhydride is added into the reaction liquid I, stirring reaction continues after adding is completed, and reaction liquid II is obtained; adding a washing liquid into the reaction liquid II, stirring, washing, and separating to obtain a tert-amyl peroxyacetate crude product; and washing and drying the tert-amyl peroxyacetate crude product, and removing the solvent to obtain the tert-amyl peroxyacetate. The method avoids the problems of a large amount of hydrochloric acid generated by a traditional acyl chloride method and corrosivity caused by using sulfuric acid as a catalyst; meanwhile, iron phosphide has magnetism, cyclic utilization can be achieved through magnetic separation after the reaction is finished, p-toluenesulfonic acid can be regenerated through ion exchange resin, and the production cost is greatly reduced.

The application discloses a PHI / zinc oxide heterojunction photocatalyst and a low-temperature synthesis method and application thereof. The structure of the photocatalyst is that PHI nanosheets grow well on the surface of ZnO and are tightly wrapped with ZnO, forming a sheet-shaped core layer structure, the thickness of the PHI nanosheet is 3-5 nm, and the ZnO is a wurtzite crystal structure. The low-temperature synthesis method comprises the following steps: mixing and heating a PHI precursor and a molten salt to obtain PHI, placing the PHI and a zinc oxide precursor in an aqueous solution, adding an alkali to adjust the pH, and then reacting to obtain the photocatalyst PHI / ZnO. The photocatalyst can be used for activating molecular oxygen to oxidize the C-H bond at the benzyl position of CM to prepare cumene hydroperoxide, and can also be used for a cascade oxidation reaction to form imine and sulfoxide series compounds. The application shows the advantages of the high-activity carbon nitride-based photocatalyst in the field of organic conversion, and provides an important platform for realizing the essence safety, green and efficient oxidation reaction by the peroxide strategy.

The present application relates to the chemical technology field, disclose a kind of preparation method of anhydrous peroxy acid product and the preparation method of caprolactone.The preparation method of anhydrous peroxy acid product includes the following steps: (1) in the presence of homogeneous acidic catalyst, hydrogen peroxide is reacted with organic acid, then the reaction product is divided into water phase and peroxy acid phase;(2) the homogeneous acidic catalyst in the peroxy acid phase is removed.The preparation method of caprolactone includes: the anhydrous peroxy acid product is oxidized with cyclohexanone.The method can catalyze the synthesis of peroxy acid with homogeneous acidic catalyst, can keep high synthesis efficiency of peroxy acid, and by removing homogeneous acidic catalyst from peroxy acid product, the refined anhydrous oxygen acid product is used for oxidizing cyclohexanone to prepare caprolactone, which can improve the selectivity and yield of caprolactone.

The application discloses a metal single-atom composite catalyst and a preparation method and application thereof. The metal single-atom composite catalyst comprises a core-shell molecular sieve and an active component; wherein the core-shell molecular sieve is a ZSM-23 molecular sieve as a core and a mesoporous silica as a shell; and the active component is a Fe-N-C species. The metal single-atom composite catalyst provided by the application is applied to a reaction of preparing C1 liquid products by low-temperature oxidation of methane, and can realize direct oxidation of methane to prepare C1 liquid products under low-temperature conditions below 80 DEG C, and has outstanding catalytic activity, selectivity and good stability.

The invention discloses a preparation method for synthesizing BIPB by using trifluoromethanesulfonic acid as a catalyst. The preparation method comprises the following steps: step S1, feeding raw materials; step S2, condensation reaction; and S3, carrying out post-treatment alkali washing. The method has the advantages that side reactions are reduced, the yield of BIPB reaches 96% or above, and the content of BIPB reaches 98 wt% or above; the reaction speed is greatly increased; the obtained bis (tert-butylperoxy isopropyl) benzene product is high in content / purity and almost white in color, recrystallization purification is not needed, the production process is shortened, and the production cost is greatly reduced; the dosage range of the catalyst enables the condensation reaction to be carried out more thoroughly, and the unforeseen circumstances that the condensation reaction is slowed down or stopped halfway due to the fact that DC contains trace alkaline substances can be avoided.

This invention belongs to the field of peroxide preparation technology, specifically relating to a heat exchange device and method for preparing peroxides. The heat exchange device includes heat exchange tubes disposed within a reaction vessel, with several heat exchangers mounted on the heat exchange tubes. Each heat exchanger includes several external fins spaced apart on a fixed plate. The fixed plate has grooves that mate with the heat exchange tubes, and the heat exchange tubes are disposed within these grooves. The peroxide preparation method involves stirring a desensitizer, a catalyst, and an oxidant together, followed by the addition of an alkyl acyl chloride or an alkyl chloroformate to continue the reaction. After the reaction is complete, a crude product is obtained. The crude product is then washed and separated to obtain the peroxide. This invention utilizes the high-efficiency heat transfer performance of the heat exchanger, thereby enabling stable preparation of peroxide products, reducing the reaction time, and improving the conversion efficiency from initial raw materials to peroxide products.

TITLE: Process for the preparation of a composition in powder form comprising at least one solid organic peroxide The present invention relates to a process for the production of a powder composition comprising at least one solid organic peroxide having the advantages of having a reduced water content and being able to flow easily. The invention also relates to a powder composition which can be obtained from the process as defined below. The present invention further relates to the use of said powder composition as a polymerization initiator for acrylic resins or unsaturated polyester resins, preferably acrylic resins, or as a polymer modifier, for example as a crosslinking agent, grafting agent or polymer rheology modifier, preferably as a polymerization initiator for acrylic resins or unsaturated polyester resins.The invention further relates to the use of said powder composition for road marking, chemical anchoring, waterproofing and flooring applications, preferably road marking.

Peroxyhydroxycarboxylic acid forming compositions and methods for forming peroxyhydroxycarboxylic acids, preferably in situ, using the peroxyhydroxycarboxylic acid forming compositions are disclosed. Methods of using the peroxyhydroxycarboxylic acids, including for treating a surface or a target in need of antimicrobial or sanitizing treatment are also disclosed. Particular applications of using odor-free, low volatility peroxyhydroxycarboxylic acid sanitizers for direct food contact are disclosed.

This invention provides a method for separating residual peroxides from epoxidized soybean oil. The method involves using a superheated, low-boiling-point stripping agent to react with the peroxide-containing epoxidized soybean oil solution in a stripping tower for gas-liquid mass transfer. During this process, the peroxides in the epoxidized soybean oil are rapidly vaporized and separated. The vaporized peroxide-containing vapor is within a safe combustion range and is further separated after condensation, allowing for the recycling of the peroxides. This method not only efficiently removes residual peroxides from epoxidized soybean oil but also ensures that the epoxy value of the obtained epoxidized soybean oil remains essentially unchanged (the difference is less than 0.02).