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40 results about "Cumene hydroperoxide" patented technology

Cumene hydroperoxide is an organic hydroperoxide intermediate in the cumene process for synthesizing phenol and acetone from benzene and propene. It is typically used as an oxidizing agent. Products of decomposition of cumene hydroperoxide are methylstyrene, acetophenone, and cumyl alcohol. Its formula is C₆H₅C(CH₃)₂OOH.

Method and system for preparing epoxy dioxide compound

The invention provides a method and a system for preparing an epoxy dioxide compound. The method comprises the following steps: enabling dialkene and cumyl hydroperoxide to be subjected to an oxidation reaction to obtain a mixture flow, enabling the mixture flow to be in contact with a basic catalyst, enabling the cumyl hydroperoxide to be subjected to a decomposition reaction to generate acetophenone and methanol, and then performing post-treatment separation to obtain the epoxy dioxide compound. According to the method, cumyl hydroperoxide is decomposed under the high-temperature alkaline condition, the product is methanol / acetophenone, the risk that epoxide dioxide is subjected to ring-opening hydrolysis to become a by-product is avoided, and the yield of subsequent products is ensured.
Owner:CHINA PETROLEUM & CHEMICAL CORP +1

Dicumyl peroxide and its preparation method and application

The present invention relates to the technical field of cumene hydroperoxide production, specifically to cumene hydroperoxide and its preparation method and application. Cumene is mixed with a composite stabilizer, hydrogen peroxide and TiO 2 -PW catalyst are added, and the reaction is carried out at 65 °C for 1.5 hours under nitrogen protection; then the temperature is raised to 85 °C and the reaction is carried out for 4 hours; the obtained reaction solution is cooled to 40 °C, and the catalyst is recovered by filtration; the aqueous phase is removed by liquid separation, and the organic phase is washed with 5% sodium bicarbonate solution until neutral; then the unreacted cumene is removed by vacuum distillation, and then treated by molecular sieve adsorption decolorization and ethanol recrystallization, and cumene hydroperoxide is obtained after drying. By using a composite stabilizer, the present invention effectively inhibits the decomposition of hydrogen peroxide, improves the stability of the reaction system, reduces the occurrence of side reactions, and improves the production efficiency.
Owner:SHANDONG PROVINCE BOYUAN CHEM CO LTD

Acetone recovery and purification

ActiveCN115734958BCarbonyl compound separation/purificationAcetone productCumene hydroperoxide
Methods and systems for the production of acetone from cumene hydroperoxide (CHP) are disclosed. The disclosed methods involve cleaving CHP to form a cleavage product stream. In some embodiments, the cleavage product stream is separated into an overhead stream and a bottoms stream. The bottoms stream is neutralized, washed, and then processed in a crude acetone column to provide a crude acetone stream. The overhead stream of the cleavage product is flashed forward in the method, bypassing neutralization, washing, and the crude acetone column, and then combined with the crude acetone stream. The combined acetone stream is provided to an acetone product column. According to some embodiments, the acetone product column includes a side draw for obtaining a recycle acetone stream, which is recycled to the cleavage reactor(s). The recycle acetone side draw can be located lower on the acetone product column than the point at which product acetone is obtained. The disclosed methods improve process efficiency.
Owner:KELLOGG BROWN & ROOT INC

Oxidation device for producing cumene hydroperoxide with multi-stage dispersion structure

The utility model belongs to hydrogen peroxide cumene production technical field, concretely relates to a kind of hydrogen peroxide cumene production with oxidation device of multistage dispersion structure. The hydrogen peroxide cumene production with oxidation device of multistage dispersion structure, including cumene storage tank, cumene storage tank is connected with preheater by feed pump, and preheater is connected with cumene feed inlet in upper portion of oxidation tower;Oxidation tower top is connected with tail gas condenser by gas phase pipeline, and tail gas condenser bottom is connected with gas-liquid separation tank. The hydrogen peroxide cumene production with oxidation device of multistage dispersion structure of the utility model is matched by air section feeding and internal structure, increases mass transfer area, improves oxidation reaction rate and selectivity;Recovery reaction heat preheats raw material, stabilizes temperature field, reduces energy consumption;Tower top separates tail gas droplet, recovers cumene, guarantees process stability, improves device safety.
Owner:SHANDONG PROVINCE BOYUAN CHEM CO LTD

A PHI / zinc oxide heterojunction photocatalyst and a low-temperature synthesis method and application thereof

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.
Owner:DALIAN UNIV OF TECH +1

Method for preparing cumyl hydroperoxide by using Joule heat to drive cumyl benzene oxidation

The invention discloses a method for preparing cumyl hydroperoxide by using Joule heat to drive cumyl benzene oxidation, which comprises the following steps: immersing a conductive forming carbon material into cumyl benzene, connecting the conductive forming carbon material with direct current until a system reaches a preset oxidation reaction temperature, and introducing oxygen to carry out oxidation reaction, the cumyl hydroperoxide is obtained. The method for preparing cumene hydroperoxide by using Joule heat to drive cumene oxidation has the advantages of high heat transfer efficiency, high temperature rise speed, accurate temperature control, low reaction energy consumption, easiness in catalyst separation and the like, and is suitable for large-scale industrial application.
Owner:SOUTH CHINA UNIV OF TECH

A cumene oxidation reaction system and method

The present invention relates to the technical field of cumene oxidation, and specifically to a cumene oxidation reaction system and method, comprising an oxidation tower and a gas-liquid separator; the oxidation tower is sequentially provided with a bubbling reactor and a microbubble generator from top to bottom; the bottom of the oxidation tower is connected to a gas supply device and a liquid supply device, respectively, and the top is connected to the gas-liquid separator; the top of the gas-liquid separator is connected to a condensing device and the gas supply device, respectively, and the condensing device is connected to an oxygen analysis device; a liquid circulation device is provided between the bottom of the gas-liquid separator and the bottom of the oxidation tower, for circulating the liquid inside the gas-liquid separator to the inside of the microbubble generator. Utilizing this system, the efficiency of cumene oxidation to produce cumene hydroperoxide can be effectively improved, and the system has the advantages of high cumene hydroperoxide production rate, high selectivity, and high safety.
Owner:CHINA PETROLEUM & CHEMICAL CORP +1

A water removing agent, its preparation method and application

The application discloses a kind of water removing agent and its preparation method and application.The water removing agent of the present application is a composite water removing agent composed of inorganic matrix calcium oxide, silicon oxide and activated carbon;Among them, the content of calcium oxide is 21-53wt%, the content of silicon oxide is 18-50wt%, and the content of activated carbon is 29-61wt%.The water removing agent of the present application can remove trace water in cumene hydroperoxide.The water removing agent has the advantages of good water removal effect, low cost and stable performance.
Owner:HONGBAOLI GRP CO LTD +1

Method for preparing cumene hydroperoxide through selective oxidation of cumene

The invention provides a method for preparing cumene hydroperoxide through selective oxidation of cumene, and the method comprises the following steps: cumene, ionic liquid BmimBr and NHPI are placed in a three-neck flask to be mixed, at the temperature of 90-120 DEG C, air with the flow of 50-150 mLmin is introduced for cumene oxidation reaction, and the molar ratio of cumene to BmimBr to NHPI is 10000: (1-3): (1.5-3). According to the method, the catalyst is combined with NHPI + BmimBr, cumene can be selectively oxidized to prepare cumene hydroperoxide under the conditions of no solvent, no transition metal salt and no initiator, the two catalytic substances have a synergistic effect and have good catalytic performance, the reaction time can be shortened, the reaction yield can be increased to 90% or above, and the method is suitable for industrial production. And the conversion rate of the isopropyl benzene reaches 16-30%.
Owner:CHINA PETROLEUM & CHEMICAL CORP

Hollow bubble bed reactor, system and method for continuous cumene oxidation to prepare hydrogen peroxide cumene and application

PendingCN122441366AMetal fiberFluid phase
The application discloses a hollow bubble bed reactor, a system and a method for continuously preparing cumene hydroperoxide by oxidizing cumene, and application of the system and the method. The hollow bubble bed reactor comprises a gas-liquid mixing reaction section and a main reaction section from bottom to top. The gas-liquid mixing reaction section comprises a gas feeding port, a liquid feeding port and a micro-bubble mixer. The main reaction section comprises a liquid discharging port and a liquid phase circulating outlet. The micro-bubble mixer comprises a tubular membrane tube. Compared with a traditional bubble column reactor and an air self-oxidation process, the application uses a hollow metal fiber membrane to control the bubble size and dispersity of gas molecules in a liquid phase, so that the safety of the device can be ensured, the conversion efficiency of cumene can be improved, the reaction time can be shortened, cumene hydroperoxide can be continuously produced, higher selectivity of a target product can be obtained, and the application has good industrial application value.
Owner:CHINA PETROLEUM & CHEMICAL CORP

Application formula of cumyl hydroperoxide in preparation of delayed curing adhesive

The invention relates to an application formula of cumyl hydroperoxide in preparation of a delayed curing adhesive, and belongs to the technical field of electronic industry assembly, the application formula comprises an original formula and cumyl hydroperoxide added in the original formula, and the original formula comprises the following components in parts by weight: 55-70 parts of epoxy resin, 1-3 parts of a curing agent, 1-3 parts of a curing agent and 1-3 parts of a curing agent. The component A comprises 20 to 50 parts of polyol, 1 to 2 parts of a photoinitiator, 0.05 to 0.1 part of a photosensitizer, 2 to 3 parts of a thixotropic agent and 0.1 to 0.5 part of a defoaming agent; the adhesive combines the advantages of photocuring and thermocuring process properties, is a single-component product, can be stored and used for a long time at room temperature under the dark condition, is different from a traditional thermocuring single-component adhesive, and is started in reaction but not immediately polymerized and cured after light irradiation, so that the adhesive has the advantages of low cost and high efficiency. A certain operable time is reserved for a user to carry out an operation step of bonding and assembling, and cumyl hydroperoxide is added, so that the retardancy of the glue after illumination is improved.
Owner:MIRACLE LINE BA (SHANGHAI) NEW MATERIAL CO LTD

Titanium silicalite molecular sieve catalyst as well as preparation method and application thereof

The invention discloses a titanium silicalite molecular sieve catalyst as well as a preparation method and application thereof, and belongs to the technical field of titanium silicalite molecular sieves. The catalyst provided by the invention is composed of an oxide of a co-metal, titanium dioxide and silicon dioxide, the type of the assistant metal is at least one of iron, zinc or copper; based on the total weight of the catalyst, the oxide of the auxiliary metal accounts for 0.1-2.5 wt%, the titanium dioxide accounts for 0.5-2.5 wt%, and the balance is silicon dioxide; the average pore size of the catalyst is 10-30 nm. According to the invention, the specific pore size is combined with the specific auxiliary metal oxide, and the auxiliary metal oxide is uniformly distributed, strongly bonded and fully activated on the surface of the titanium silicalite molecular sieve by optimizing the titanium silicalite molecular sieve, so that the stability of the action effect is ensured. When the catalyst disclosed by the invention is used for epoxidation reaction of cumyl hydroperoxide and 3-chloropropene, the influence of chlorine element on CHP decomposition side reaction is effectively reduced, so that the generation of phenol is reduced.
Owner:HONGBAOLI GRP CO LTD +1

Plant anti-freezing solution composition as well as preparation method and application thereof

The invention relates to a plant anti-freezing solution composition as well as a preparation method and application thereof. The composition comprises a film-forming agent, a film-forming initiator, a phosphorus-potassium fertilizer, an anti-freezing solution and the balance of water. The film-forming agent is polyvinyl alcohol and sodium alginate; the film forming initiator is at least one of potassium persulfate, azodiisobutyronitrile and cumene hydroperoxide; the phosphorus-potassium fertilizer is at least one of potassium phosphite and monopotassium phosphate; the anti-freezing liquid is at least one of ethylene glycol, alpha-propylene glycol and glycerol. The composition further contains a biostimulant, a biological bactericide, a plant growth regulator and a biological surfactant. The invention provides a preparation method of an anti-freezing solution composition and application of the anti-freezing solution composition to field crops, fruit trees, vegetables and gardens needing to be subjected to anti-freezing.
Owner:CHONGQING JULAI SOIL IMPROVEMENT TECH RES CO LTD

Catalyst for cumene hydroperoxide decomposition and process for preparation thereof

The present invention relates to a catalyst for cumene hydroperoxide decomposition, wherein said catalyst has good efficacy, provides good decomposition of cumene hydroperoxide and good selectivity to main products, provides high yield percentage of alpha methyl styrene, and reduces the formation of unwanted byproducts. Said catalyst comprises zeolite beta, wherein said catalyst has the following characteristics: a) the mole ratio of silica to alumina is from 30 to 100; and b) the peak area ratio obtained from the analysis using 27Al magic angle spinning-nuclear magnetic resonance (27Al MAS-NMR) technique according to the following relation: (A+C+D) / B is from 0.1 to 0.3; wherein A, B, C, and D are the peak area at the peak position from 44 but less than 54 ppm, the peak area at the peak position from 54 to 58 ppm, the peak area at the peak position greater than 58 to 64 ppm, and the peak area at the peak position from -10 to 5 ppm, respectively, by the peak deconvolution analysis with Lorentz / Gauss function under the condition that the minimum distance between peaks for independent integration (AZFW) is equal to 0.5 ppm. Moreover, this invention relates to a preparation process of the catalyst comprising the step of contacting zeolite beta with polycarboxylic acid solution and calcination at the temperature in the range from 400 to 700 °C, wherein said polycarboxylic acid has the pKa of the first dissociation from 1.5 to 3.5 and has the molecular structure with at least one side having size larger than 6 Å. This invention also relates to a process for cumene hydroperoxide decomposition using said catalyst or catalyst prepared from said preparation process of the catalyst.
Owner:PTT GLOBAL CHEMICAL PUBLIC COMPANY LIMITED

High-stability isopropyl phenyl hydroperoxide composition for storage and transportation and preparation method thereof

PendingCN121801325ASolve the hidden danger of explosionSolve the pain points of forced scrappingBulk chemical productionSalen ligandControl release
The invention relates to the technical field of functional polymer materials, in particular to a high-stability isopropyl phenyl hydroperoxide composition for storage and transportation and a preparation method of the high-stability isopropyl phenyl hydroperoxide composition. The composition comprises a CHP matrix, an aprotic polar flame-retardant solvent, a TEMPO / BHT microcirculation antioxidant system cooperating with a fat-soluble Salen ligand, a hydrophobic modified hollow mesoporous silica microsphere preloaded with a stabilizer, and an intelligent early-warning microcapsule with a phase-change temperature-controlled release function. According to the invention, metal ion impurities are captured in situ by using a Salen ligand, and efficient capture and cyclic removal of free radicals are realized by combining TEMPO / BHT; a color developing agent and an antioxidant are released by melting the phase change material during abnormal temperature rise, and visual early warning and targeted self-repairing are provided.
Owner:SHANDONG PROVINCE BOYUAN CHEM CO LTD

Additive manufacturing compositions and methods

A thermosetting composition comprising a crosslinkable component such as a vinyl ester and / or an unsaturated polyester, and an initiator component, such as cumene hydroperoxide or BPO or blends of cumene hydroperoxide and methyl ethyl ketone peroxide. The composition is suitable to be used in additive manufacturing to form objects such as molds or prototypes.
Owner:POLYNT COMPOSITES USA INC

Preparation method of anti-freezing and thawing flexible anti-seepage material for power transmission line foundation pile

The present application relates to the technical field of anti-seepage materials, and particularly relates to a preparation method of a freeze-thaw resistant flexible anti-seepage material for a power transmission line foundation pile, which comprises the following steps: adding deionized water, polybutadiene latex, an emulsifier, a chelating agent, potassium hydroxide, ferrous sulfate and a reducing agent to a reaction kettle to form a solution to be reacted; adding cumene hydroperoxide to the solution to be reacted to initiate an initial reaction; adding a mixed solution containing styrene monomers to the initial reaction solution; the pH value of the initial reaction solution is kept at 9.5-10.5; mixing a demulsifier with polybutadiene modified latex to obtain a demulsified suspension; washing and drying the demulsified suspension to obtain polybutadiene modified latex solid powder; mixing the polybutadiene modified latex solid powder with recycled aggregate, cement, water glass and water reducing agent, and continuously adding water and stirring after mixing to obtain the freeze-thaw resistant flexible anti-seepage material. The present application realizes the flexibility of the freeze-thaw resistant flexible anti-seepage material.
Owner:CHANGCHUN ARCHITECTURE & CIVILENGEERING CO LLEGE

A system for concentrating and decoloring cumene hydroperoxide

ActiveCN224331518UEfficient decolorizationEfficient concentrationOrganic compound preparationDistillation regulation/controlMulti-stage flash distillationProcess engineering
The utility model relates to the technical field of chemical production, concretely relates to a cumene hydroperoxide concentration and decoloration system, including primary flash tank, the primary flash tank top has the secondary flash tank through pipeline connection, the primary flash tank bottom has the light heavy component collection jar through pipeline connection, the secondary flash tank top has the light heavy component collection jar through pipeline connection, the secondary flash tank bottom has the tertiary flash tank through pipeline connection, the tertiary flash tank top has the light heavy component collection jar through pipeline connection, the light heavy component collection jar top is connected with vacuum unit, the utility model discloses through multistage flash and vacuum low temperature operation, has realized the efficient decoloration and concentration of CHP, has given consideration to safety, environmental protection and economy, has improved the product quality of downstream ABS resin significantly, has solved the key problem that the product yellowing of chromaticity is out of limit in traditional craft.
Owner:LIHUAYI WEIYUAN CHEM CO LTD +1

Preparation method of 1, 2-epoxypentane

The invention discloses a preparation method of 1, 2-epoxypentane, which comprises the following steps: introducing a cumene solution of cumene hydroperoxide and 1-pentene into a fixed bed reactor filled with a catalyst layer, and carrying out epoxidation reaction on the 1-pentene and the cumene solution of cumene hydroperoxide to generate the 1, 2-epoxypentane, wherein the catalyst layer is composed of a mesoporous titanium-silicon catalyst and a cocatalyst, the cocatalyst is aluminum oxide loaded with a cometal element, and the cometal element is K, Na, Ca or Mg; the pH value A1 of the cumene solution of cumene hydroperoxide and 1-pentene before contacting the catalyst layer is smaller than the pH value A2 of the cumene solution of cumene hydroperoxide and 1-pentene after contacting the catalyst layer. According to the method, under the condition that the filling amount and form of the original reaction catalyst are not changed and the aluminum oxide carrier is loaded with elements such as K, Na, Ca, Mg and Sn, the alkalinity adjusting effect of a reaction system is provided, so that the epoxidation reaction is carried out in a neutral system, the formation of 1, 2-pentanediol, aldehydes and acid byproducts is effectively reduced, the service life of the catalyst is prolonged, and the activity of the catalyst is improved.
Owner:HONGBAOLI GRP CO LTD

Process for the production of acetone with low aldehyde content

Methods and systems for the production of acetone from cumene hydroperoxide (CHP) are disclosed. The methods and systems involve an acetone purification column configured to separate acetone from other components of the product / reactant stream. The acetone purification column is equipped with a side draw configured to transport a portion of the column contents to a caustic treatment vessel where the contents react with a dilute alkaline aqueous solution to remove aldehydes from the acetone product. The contents of the caustic treatment vessel are then transported back to the acetone purification column. The use of a separate caustic treatment vessel for aldehyde removal provides increased contact time between the acetone product and the alkaline solution, providing higher aldehyde removal.
Owner:KELLOGG BROWN & ROOT INC

A method for producing propylene oxide with low energy consumption by the cumene process

The present invention discloses a method for producing propylene oxide with low energy consumption by the cumene method, which includes: S1 reacting cumene with an oxygen-containing gas in a gas-liquid bubble column reactor to obtain an oxidation liquid with a cumene hydroperoxide concentration of 30-70%, and obtaining dry cumene hydroperoxide after removing impurities; S2 reacting the dry cumene hydroperoxide with propylene in a shell-and-tube fixed-bed reactor, and first recovering the excessive propylene from the obtained epoxidation material, and then obtaining propylene oxide and crude α,α-dimethylbenzyl alcohol through separation and purification; S3 subjecting the crude α,α-dimethylbenzyl alcohol to a hydrogenolysis reaction with hydrogen to be converted into crude cumene; S4 subjecting the crude cumene to removal of heavy components, removal of light components and alkali washing, and returning it to step S1 after removing the impurities therein. By increasing the oxidation depth of cumene in the oxidation unit, the present invention greatly reduces the circulation amount of cumene and significantly reduces the energy consumption of the device, and improves the economy of the device.
Owner:CHANGZHOU RUIHUA CHEMICAL ENGINEERING TECHNOLOGY CO LTD

A polymer suitable for high salinity high suspended solids low charge

A polymer suitable for high-salinity, high-suspended-matter, and low-charge oilfield fracturing fluids is disclosed, comprising the following components by weight: 20-30 parts N-methoxymethylacrylamide, 15-20 parts polyethylene glycol diacrylate, 15-20 parts acryloylmorpholine, 15-20 parts N-vinylcaprolactam, 10-15 parts polyethylene glycol monoallyl ether, 0.2-0.4 parts glycerol diallyl ether, 0.1-0.3 parts cumene hydroperoxide, 0.1-0.3 parts diethylethanolamine, and 70-90 parts deionized water. The polymer synthesized in this invention has a low charge, effectively reducing adsorption with negatively charged clay minerals in the formation, thus minimizing polymer loss and formation damage. This invention effectively solves the problem of insufficient performance of traditional polymers in fracturing fluids under special reservoir conditions, enabling efficient fracturing stimulation of high-salinity, high-suspended-matter reservoirs.
Owner:HEBEI TIANSHI CHEMICAL CO LTD

Synthesis method of bifunctional organic peroxide

The invention discloses a synthesis method of a bifunctional organic peroxide. The method comprises the following step: in the presence of a solvent, an acidic catalyst and a cocatalyst A, carrying out condensation dehydration reaction on bis (2-hydroxy isopropyl) benzene and cumene hydroperoxide to obtain the bis (phenyl isopropyl peroxy isopropyl) benzene. The method provided by the invention is mild in reaction condition, easy in reaction control, high in target product yield, short in reaction time, high in safety, small in three-waste generation amount, clean, environment-friendly and suitable for industrialization.
Owner:CHINA PETROLEUM & CHEMICAL CORP +1

Method of Preventing and Treating Chemotherapy- Induced Alopecia

Compositions and methods for treating alopecia, particularly chemotherapy-induced alopecia, using oxidizers or oxidants, pro-oxidant compounds, or activators of P53. Compositions comprising organic peroxides such as, cumene hydroperoxide, tert-Butyl hydroperoxide (t-BHP), hydrogen peroxide, benzoyl peroxide are preferred. Compositions may be applied subcutaneously, percutaneously, or topically. Most preferably, the compositions are applied to a treatment area prior to a round of chemotherapy to prevent or reduce hair loss in the treatment area.
Owner:JJR&D LLC

A method for measuring trace water content in cumene hydroperoxide solution

The present application provides a method for measuring trace water in cumene hydroperoxide solution. First, the concentration of the cumene hydroperoxide solution is measured by indirect iodine titration, then the cumene hydroperoxide solution is reduced by adding excess triphenylphosphine to eliminate the oxidizing property of the cumene hydroperoxide, and the reduced solution is obtained, then the water content of the reduced solution is measured by Karl Fischer coulometry, and finally the water content of the original cumene hydroperoxide solution is converted. According to the method described in the present application, the trace water content in the cumene hydroperoxide solution can be measured, the quality index of the cumene hydroperoxide is controlled, the influence of the water in the cumene hydroperoxide solution on the performance of the epoxidation catalyst in the subsequent section is avoided, and the service life of the catalyst is prolonged.
Owner:CHINA PETROLEUM & CHEMICAL CORP

A continuous process for the preparation of dicumyl peroxide

The present application relates to the technical field of preparation of dicumyl peroxide, and provides a continuous preparation method of dicumyl peroxide, which can realize the combination of high conversion rate of raw materials and high selectivity of products and the safety of reaction process. The continuous preparation method of dicumyl peroxide comprises the following steps: (1) condensation reaction of cumene hydroperoxide and α, α-dimethylbenzyl alcohol is carried out in a kettle reactor to which an acidic catalyst aqueous solution is added at 30-55 ℃, and vacuum dehydration is carried out during the condensation reaction, and the conversion rate of cumene hydroperoxide is controlled to be 70-90%; (2) the reaction mixture obtained in step (1) is sent into a micro-channel reactor, and condensation reaction is continuously carried out at 60-90 ℃ in the presence of additional acidic catalyst aqueous solution, so that the dicumyl peroxide is prepared.
Owner:WANHUA CHEM GRP CO LTD

A titanium-silicon catalyst, a method for preparing the same, and a method for preparing epoxycyclohexane using the catalyst

A titanium-silicon catalyst, a preparation method thereof and a method for preparing epoxycyclohexane by using the catalyst, the titanium-silicon catalyst comprising titanium element and modified silica carrier, the modified silica carrier containing aluminum element, the titanium element accounting for 0.5-6.0wt% based on the total weight of the titanium-silicon catalyst, the silicon element accounting for 88-97wt% based on the total weight of the titanium-silicon catalyst, and the aluminum element accounting for 17-31 times of the silicon element based on the oxide of aluminum. The method for preparing epoxycyclohexane by using the catalyst is to perform an epoxidation reaction of cyclohexene and an oxidant under the action of the titanium-silicon catalyst, to obtain a mixture I after the reaction, and to separate epoxycyclohexane from the mixture I. The titanium-silicon catalyst has suitable catalytic activity, can catalyze the reaction of cyclohexene and cumene hydroperoxide under low-temperature and low-pressure reaction conditions, and reduces the generation of byproduct impurities. The method for preparing epoxycyclohexane by using the catalyst has mild conditions, high raw material conversion rate and good product selectivity.
Owner:HONGBAOLI GRP CO LTD +1

Processing method for propylene epoxidation reaction raw materials and propylene epoxidation method

The invention discloses a processing method for propylene epoxidation reaction raw materials and a propylene epoxidation method. The treatment method comprises the steps of performing calcium-based molecular sieve treatment and water washing on a reaction raw material, wherein the reaction raw material is a solution containing cumyl hydroperoxide or ethylbenzene hydroperoxide. According to the treatment method, the content of oxalic acid or oxalate in cumyl hydroperoxide or ethylbenzene hydroperoxide is reduced through calcium-based molecular sieve treatment, so that the stability of material inlet and outlet pressure of a reactor is ensured, and smooth continuous production is ensured. Alkali washing is not needed, water washing is carried out after passing through a molecular sieve bed layer, sodium ion intake can be reduced, a catalyst bed layer is protected, and bed layer pressure drop is reduced.
Owner:CHINA PETROLEUM & CHEMICAL CORP +1

Method for testing water content of organic peroxides and use thereof

The present application relates to a kind of organic peroxide water content testing method and its application, the testing method includes: organic peroxide sample and reducing agent are mixed to obtain reactant;Test the water content of the reactant and the water content of reducing agent, calculate the water content of the organic peroxide sample;The organic peroxide includes any one or the combination of two in benzoyl peroxide or cumene hydroperoxide;The reducing agent includes sulfide compound.The organic peroxide water content testing method provided by the present application introduces sulfide compound as reducing agent, which can effectively avoid the deviation caused by the reaction of organic peroxide with Karl Fischer reagent during water content test, realize the high-precision, high-accuracy water content determination, and the testing method is simple to operate, with high practical value.
Owner:JIANGSU YANGNONG CHEMICAL GROUP CO LTD

Membrane reaction-separation integrated system and method for phenol production process

The invention discloses a membrane reaction-separation integrated system and method for phenol production, and belongs to the technical field of chemical process and equipment. Aiming at the problems of low mass transfer efficiency, complex separation process, huge equipment and the like in the traditional cumene oxidation method, the system adopts hollow fiber membrane contactors which are connected in series; the integrated operation of oxidation, decomposition and extraction is realized through three stages: in the first stage, cumene and oxygen are in countercurrent contact in a hydrophobic porous hollow fiber membrane reactor and are efficiently oxidized to generate cumene hydroperoxide; in the second stage, cumyl hydroperoxide and sulfuric acid are decomposed into phenol and acetone through a membrane reactor; in the third stage, directional enrichment of phenol from a sulfuric acid phase to an organic extraction agent is realized by utilizing a membrane extractor, and meanwhile, sulfuric acid is recovered. By strengthening gas-liquid / liquid-liquid interface mass transfer, the reaction rate and selectivity are improved, by-products and phase separation energy consumption are reduced, equipment is compact, production is easy to amplify, and the method has the advantages of flow simplification, cost reduction, environmental friendliness and the like.
Owner:TAIZHOU VOCATIONAL COLLEGE OF SCI & TECH