19 results about "Cumene hydroperoxide" patented technology

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

The application provides a cumene hydroperoxide condensation wastewater treatment process, which comprises the following steps: (1) adjusting the pH of cumene hydroperoxide condensation washing wastewater to 2-8 by using an acid, and then transferring the wastewater to an extraction tower; (2) adding an oil phase containing an oil-soluble surfactant into an aqueous phase A containing a water-soluble surfactant A, and mechanically stirring until foam is generated to obtain CLA; (3) using mechanical stirring to stir an aqueous phase B containing a surfactant B until a sustained volume of foam is generated to obtain CGA; (4) diluting the obtained CLA with water, and then feeding the CLA into the bottom of the extraction tower; after standing for a period of time, feeding the obtained CGA into the bottom of the extraction tower, and after the feeding is completed, performing liquid separation to separate the wastewater from the extraction layer. The cumene hydroperoxide condensation wastewater treatment process has high extraction efficiency, short treatment time, and low wastewater post-treatment cost, the extractant does not contain benzene / dimethylbenzene and other harmful substances to human body, the environmental and economic benefits are remarkable, and the cumene hydroperoxide condensation wastewater treatment process can be applied to large-scale industrial production devices.

The invention provides a preparation method of epoxypropane. The preparation method of the epoxypropane comprises the following steps: S1, carrying out oxidation reaction on cumene to obtain a material containing cumene hydroperoxide; s2, enabling the material containing cumyl hydroperoxide to react with propylene to obtain epoxypropane and a material 1 containing alpha, alpha-dimethyl benzyl alcohol; s3, carrying out heat treatment on the material 1 containing alpha, alpha-dimethyl benzyl alcohol to obtain a material 2, and carrying out hydrotreatment on the material 2 to obtain isopropyl benzene; and S4, independently introducing the cumene obtained in the step S3 or introducing the cumene obtained in the step S3 and fresh cumene into the step S1 to carry out the oxidation reaction. According to the method for preparing the epoxypropane, the loss of the cumene is effectively reduced, the utilization rate of the cumene raw material is improved, and the method has relatively high economical efficiency and industrial application value.

The application discloses a coupling method and system for cumene refining and low-temperature concentration of cumene hydroperoxide, wherein the coupling method for cumene refining and low-temperature concentration of cumene hydroperoxide comprises the steps of refining cumene and low-temperature concentrating cumene hydroperoxide, and heat coupling is performed between the refining process of cumene and the refining process of cumene hydroperoxide by controlling the temperature and pressure of cumene refining and the temperature and pressure of cumene hydroperoxide concentration. The application realizes zero energy consumption in the concentration process, effectively establishes a low-temperature double-effect process, and simultaneously achieves the purposes of reducing product decomposition and energy consumption.

This invention discloses a pretreatment method for cumene oxidation liquid and its application. The method includes alkaline washing of the cumene oxidation liquid containing cumene hydroperoxide with an alkaline washing agent, followed by oil-water phase separation treatment, and finally passing the resulting oil phase through a hydrophobic filter material. Compared with oxidation liquids containing high concentrations of acid and sodium ions, the oxidation liquid treated by this invention can significantly improve the activity and stability of the epoxidation catalyst when used as a raw material for epoxidation reactions. Furthermore, compared with existing deacidification and sodium removal processes, this method eliminates the need for multi-stage water washing, hydrocyclone separation, and other enhanced separation methods, making the process simpler.

The application provides a preparation method of dicumyl peroxide. The preparation method is a condensation reaction of cumene hydroperoxide and alpha,alpha-dimethyl benzyl alcohol under the condition of an inhibitor and an acidic catalyst, and vacuum dehydration is simultaneously performed in the condensation reaction process. The combined inhibitor can greatly inhibit the decomposition of cumene peroxide and dicumyl peroxide, and finally realizes high conversion rate of raw materials, high selectivity of products and intrinsic safety of the reaction process. The conversion rate of cumene hydroperoxide is more than 99.5%, and the selectivity of dicumyl peroxide is more than 98%.