95 results about "Cumene" patented technology

The invention discloses a light internal partition wall board and a preparation process thereof, and belongs to the technical field of building materials. The light internal partition wall board is prepared from the following main raw material components in parts by mass: 500 to 700 parts of slag washed sand, 1400 to 1600 parts of cement, 40 to 50 parts of flame-retardant light filler, 10 to 24 parts of flame retardant, 15 to 60 parts of air entraining agent, 8 to 24 parts of water reducing agent and 330 to 750 parts of water. Wherein the flame-retardant light filler is obtained by sequentially reacting expanded polystyrene particles with bis (pinacolato) diboron, 4-bromo-3-isopropyl benzoic acid and triisopropyl phenyl phosphate; the water reducing agent is prepared from polyvinyl alcohol; the prepared light internal partition wall board is high in compressive strength, good in fire resistance and light in mass.

Hoses include inner tube, a reinforcement layer disposed outwardly from the inner tube, and a cover layer disposed outwardly from the reinforcement layer, and the cover layer and / or inner tube is based on a cured composition formed from a mixture containing a blend of chlorinated polyethylene (CPE) and cross-linkable oxidized high density polyethylene (oxidized HDPE), where the CPE and oxidized HDPE are blended in a CPE:oxidized HDPE weight ratio of from 10:1 to 1:1, and a peroxide curing system. The peroxide curing system used in some compositions according the disclosure include alpha-alpha-bis(t-butylperoxy)diisopropylbenzene and trimethylolpropane trimethacrylate.

A system can be used to reduce the impurities present in a styrene monomer product distilled from a pyrolysis oil. The system can include a fractionation train downstream from a depolymerization unit. The fractionation train may include four fractionation columns in series and produce a styrene monomer product stream comprises at least 99.0 wt% styrene and 300 ppm or less cumene.

A liquid organic peroxide composition including: (a) di(tert-butylperoxy)diisopropylbenzene; and (b) at least one aliphatic organic peroxide selected from the group consisting of 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane, di(tert-amyl) peroxide, di(tert-butyl)peroxide, and 2,5-dimethyl-2,5-di(t-butylperoxy)hexyne-3. The organic peroxide composition is a homogenous liquid at ambient temperature.

The invention discloses a model compound-based lipid oxidation free radical specificity induction and detection method, which comprises the following steps: catalyzing a model compound (cumene / cumene hydroperoxide) or a lipid sample by using iron ions (Fe < 2 + > / Fe < 3 + >) with different valence states, and specifically inducing to generate cumene alkyl free radicals, cumene peroxide free radicals and cumene alkoxy free radicals; the method comprises the following steps: reacting a free radical trapping agent PBN with active free radicals to generate a stable PBN-free radical adduct; the adduct is separated and qualitatively identified by utilizing HPLC-TOF / MS (High Performance Liquid Chromatography-Time of Flight / Mass Spectrometry), and is accurately quantified by HPLC-UV (High The method has the advantages that three key free radicals can be specifically distinguished and quantified, the sensitivity is high, the repeatability is good, the method is suitable for free radical analysis from a model system to a complex grease sample, and a reliable analysis means is provided for research on a lipid oxidation mechanism.

The utility model belongs to the technical field of storage devices, and particularly relates to a storage device based on bis (tert-butylperoxy) diisopropyl benzene. Comprising a storage tank, a discharge valve is arranged at the bottom of the storage tank, and a chemical material device is connected below the discharge valve. And the material melting device comprises a pressurizing initial melting device and a melting device which are connected in sequence. The pressurizing primary melting device comprises a pressurizing primary melting bin, a primary melting heating sleeve is arranged outside the pressurizing primary melting bin, the melting device comprises a melting bin, and a melting heating sleeve is arranged outside the melting bin. And the pressurized primary melting bin is connected with a nitrogen pipeline. And the pressurizing initial melting device is connected with the melting device through a connecting pipeline. According to the material melting device, through nitrogen pressurization and heating, solid materials are rapidly melted into thick slurry, the thick slurry is conveyed downwards through a connecting pipeline to a melting bin to be further heated into liquid, and the liquid is conveyed to a production device to serve as a raw material to participate in production. Rapid heating and melting are achieved, raw materials in the whole storage tank do not need to be melted, the heating process is continuous, and efficiency is greatly improved.

The invention belongs to the technical field of catalysis, and relates to a water-resistant low-temperature catalyst and a preparation method and application thereof.The surface of a Mn / Al2O3 catalyst is doped with Cr oxide, and then a certain amount of 2, 4, 6-triisopropyl benzoic acid (Y-CrMn / Al2O3) is grafted to the surface of CrMn / Al2O3. The water-resistant low-temperature catalyst has excellent catalytic activity and water poisoning resistance, 2, 4, 6-triisopropyl benzoic acid is grafted on the surface of the chromium and manganese doped Al2O3 catalyst, the water poisoning resistance of the catalyst in 5% vol water vapor wet flue gas is improved, and the activity of the catalyst is reduced by about 3%. The catalyst is especially suitable for low-temperature catalytic oxidation of VOCs in moisture-containing flue gas, and has a wide application prospect. The catalyst is prepared by adopting conventional dipping, calcining and surface grafting processes, the process is simple, the reproducibility is good, and the catalyst shows good stability and water-resistant stability in long-term use.

The application provides a long-term high-temperature thermal-oxidative aging resistant flame-retardant polypropylene insulating material and a preparation method and application thereof, and preparation raw materials of the long-term high-temperature thermal-oxidative aging resistant flame-retardant polypropylene insulating material include polypropylene grafting antioxidant modified material, EMA resin, halogen-free flame retardant, auxiliary antioxidant, metal ion passivator and lubricant; and preparation raw materials of the polypropylene grafting antioxidant modified material include polypropylene, hindered phenol monomer, methyl methacrylate and di-tert-butyl peroxide isopropyl benzene. The flame-retardant polypropylene insulating material provided by the application solves the problems of spraying and precipitation caused by high antioxidant addition amount when the polypropylene material meets the long-term high-temperature thermal-oxidative aging resistance requirement from the root, and the degree of PP thermal-oxidative aging degradation and negative chain reaction in the later stage are further reduced as the PP tertiary carbon hydrogen is consumed in the grafting process, and the long-term high-temperature thermal-oxidative aging resistance of the material as a whole is further improved.

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.

The application provides a preparation method of high-content 2-trifluoromethyl-4-heptafluoroisopropylaniline, in which 2-trifluoromethyl aniline and 2-bromine heptafluoropropane are reacted in the presence of hydrosulfite, a solvent and a catalyst to obtain high-content 2-trifluoromethyl-4-heptafluoroisopropylaniline through reaction and post-treatment; the catalyst is selected from phosphoric acid, pyrophosphoric acid, hypophosphorous acid, metaphosphoric acid, phosphorous acid, pyrophosphorous acid, hydrobromic acid, hydrogen bromide gas, hydrogen chloride gas or sodium bisulfite. The preparation method is simple in operation and mild in chemical reaction conditions; under the preferred reaction conditions, the conversion content reaches more than 96% in one reaction, the post-treatment steps are few, rectification is not needed, the content of the final product is more than 98%, the total reaction yield is more than 93%, the industrial production is easy, and the method has a high application prospect.

The invention provides a novel preparation method of 2-(3-isopropyl phenyl) propane-2-alcohol, which comprises the following steps: reacting m-diisopropylbenzene, air and alkali liquor to obtain an oxidation reaction solution, reducing the oxidation reaction solution, and then washing, rectifying and de-weighting to obtain a 2-(3-isopropyl phenyl) propane-2-alcohol product. The method has the advantages of convenience, rapidness, high selectivity and high practical value.

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 invention belongs to the technical field of separation of a mixture of isopropyl benzene and ethylbenzene, and particularly relates to a method and a production system for separating the mixture of isopropyl benzene and ethylbenzene in an adsorption-rectification coupling mode, and the method comprises the following steps: enabling the mixture of isopropyl benzene and ethylbenzene to pass through an adsorption-elution tower to obtain isopropyl benzene with the mass fraction greater than or equal to 99.5%; and eluting the saturated adsorption-elution tower by using an eluent to obtain an eluent and ethylbenzene mixture, separating the eluent and ethylbenzene mixture through a side rectifying tower to obtain ethylbenzene with the mass fraction greater than or equal to 99% and the eluent, and recycling the eluent. The method provided by the invention solves the problems of low purity, high energy consumption and low yield caused by direct rectification separation of isopropyl benzene and ethylbenzene, and has good economic benefits and environmental benefits.

The invention discloses a conversion method of alpha, alpha-dimethyl benzyl alcohol, which comprises the following steps: sequentially carrying out hydrogenolysis reaction and dehydration treatment on a material flow containing alpha, alpha-dimethyl benzyl alcohol in at least one hydrogenolysis reaction unit to obtain a product cumene, each hydrogenolysis reaction unit comprises a hydrogenolysis reactor and a dehydrator, the preparation method of each reaction unit comprises the following steps: S01, conveying a material flow containing hydrogen and a material flow containing alpha, alpha-dimethyl benzyl alcohol into a hydrogenolysis reactor from the bottom of the hydrogenolysis reactor to carry out hydrogenolysis reaction, and obtaining a reaction mixture after the hydrogenolysis reaction; the hydrogenolysis reactor is filled with a solid hydrogenolysis catalyst, and the water content of the material flow containing alpha, alpha-dimethyl benzyl alcohol is less than or equal to 0.2 wt%; s02, the reaction mixture is output from the upper portion of the hydrogenolysis reactor and directly enters a dehydrator without being cooled, the pressure in the dehydrator is smaller than that in the hydrogenolysis reactor, water is removed in a gas phase state, and an oil phase containing isopropyl benzene is obtained after treatment through the dehydrator. The method has high raw material conversion efficiency and good product selectivity.

The invention discloses a method for upgrading and utilizing pyrolytic oil of waste fan blades, and belongs to the technical field of recycling of the waste fan blades. The invention mainly solves the problem of low value of pyrolytic oil of the fan blade at present. According to the method, the pyrolytic oil is obtained by pyrolyzing the waste epoxy fan blade, then p-isopropenyl phenol in the pyrolytic oil is converted into p-isopropylphenol through a selective hydrogenation reaction, high-value chemicals such as phenol and p-isopropylphenol are separated from the pyrolytic oil through rectification, and high-value utilization of the pyrolytic oil is achieved. The method is simple in process, high in operability and easy for industrial production. Through a collaborative strategy of selective hydrogenation reaction and rectification separation, the method is used for upgrading utilization of the pyrolytic oil of the waste epoxy fan blade, the problem that separation of p-isopropylphenol and p-isopropenyl phenol in the pyrolytic oil is difficult to realize through conventional rectification is solved through selective hydrogenation reaction, the separation barrier of p-isopropylphenol and p-isopropenyl phenol is broken through, and the yield of the pyrolytic oil is improved. And high-value chemicals such as phenol and p-isopropyl phenol are separated from the pyrolytic oil.

The invention relates to a high-toughness mulching film and a preparation method thereof, and relates to the technical field of agricultural mulching films, the high-toughness mulching film comprises polypropylene random copolymer, a reactive elastomer, an antioxidant, a stabilizer, an acid absorbent and fumed silica; wherein the reactive elastomer is prepared from a polyolefin elastomer, 4-acryloyloxy-1, 2, 2, 6, 6-pentamethylpiperidine, bis (tert-butylperoxy isopropyl) benzene, white oil and an antioxidant 1076. Harmful polypropylene free radicals generated in the early stage of field photo-oxidative aging of the mulching film are specifically captured by interfacial active groups through a reactive elastomer, and are converted into firm covalent bonds, so that an aged broken-chain polypropylene molecular segment is directly anchored on a high-toughness elastomer network; dynamic compensation of interface bonding strength is realized, and excellent initial toughness is obtained; and along with the prolonging of the aging time, the durability of high toughness is prolonged, and the problem of residual film pollution caused by embrittlement and breakage is inhibited.

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 application provides a preparation method of dihydroperoxy cumene, comprising the following steps: continuously feeding diisopropylbenzene into a reactor, and performing an oxidation reaction in the presence of a base to obtain dihydroperoxy cumene; wherein the reactor comprises N reaction sections distributed along the flow direction of the diisopropylbenzene, and N is an integer greater than or equal to 2; and the base is added into the reactor from at least two reaction sections in the process of the oxidation reaction. By using the above method and device for preparing dihydroperoxy cumene, dihydroperoxy cumene with high selectivity can be obtained.

The application discloses a drying device for preparing buthionine, belongs to the technical field of buthionine preparation, and comprises an operating mechanism, a mixing mechanism for preparing raw materials is arranged on the operating mechanism, and a drying mechanism for drying solvents is arranged on the operating mechanism. When the lower pressing frame is pressed down, 2.6-diisopropyl-4-phenoxyphenyl isothiocyanate and toluene are mixed and then dropped into t-butylamine, and finally the three are mixed by standing, meanwhile, the intermediate product dried in the last preparation process is drawn into a crystallization box for crystallization; when the lower pressing frame is lifted up, the prepared raw materials enter a drying bottle for drying, and the buthionine prepared in the last preparation process is taken out, so that the application has high automation degree and good continuity; when the drying mechanism dries the drying bottle through a heater, the drying bottle rotates at the same time, so that the heating area is increased and uniform drying is realized.

A catalyst compound of formula (I) for the oxidation of an olefin into a ketone and a process of oxidation of an olefin into a ketone, which includes a step of reacting the olefin with an oxidant in the presence of the catalyst compound of formula (I). The catalyst compound of formula (I) allows for the oxidation to be carried out under mild conditions, without the use of cancerogenic compounds such as isoprene, benzene or cumene, and with a high selectivity for the production of ketones.

The invention relates to the technical field of silicone rubber, in particular to a modified silicone rubber material and a preparation method thereof. The preparation method comprises the following steps: 1, contacting white carbon black with water vapor for primary heat treatment to obtain dechlorinated white carbon black, and then contacting the dechlorinated white carbon black with water and a modifier for secondary heat treatment to obtain modified white carbon black; 2, tabletting raw silicone rubber, the modified white carbon black, a heat-resistant additive, a vulcanizing agent and a vulcanizing aid to obtain a mixed rubber sheet, and vulcanizing the mixed rubber sheet to obtain a modified silicone rubber material; the vulcanizing agent comprises at least one of dicumyl peroxide, bis (tert-butylperoxy) isopropyl benzene and 2, 4-dichlorobenzoyl peroxide; the vulcanizing aid is prepared from at least one of N, N '-m-phenylenedimaleimide, trimethylolpropane triacrylate, trimethylolpropane trimethacrylate and diallyl phthalate. The method provided by the invention can make the silicone rubber material have good mechanical properties at normal temperature and excellent compressive deformation resistance at high temperature.

The invention discloses a low-temperature-resistant bipolar plate ethylene-propylene-diene monomer (EPDM) sealing ring material and a preparation method thereof, and belongs to the field of rubber sealing strips, and the low-temperature-resistant bipolar plate EPDM sealing ring material comprises the following raw materials by weight: 100 parts of special ethylene-propylene-diene monomer; 3-8 parts of zinc oxide; 1 to 3 parts of 2, 2, 4-trimethyl-1, 2-dihydroquinoline polymer; 1 to 3 parts of 4, 4 '-bis (alpha, alpha-dimethyl benzyl) diphenylamine; 20 to 30 parts of N-774 carbon black; 20 to 30 parts of N990 carbon black; 1-3 parts of a dispersant FL; 1-8 parts of modified silicon dioxide; 3 to 10 parts of naphthenic oil; 2-6 parts of an assistant crosslinker; 10 to 20 parts of diisopropyl benzene peroxide; wherein epoxy groups are grafted on the modified silicon dioxide. By using the low-temperature-resistant bipolar plate EPDM sealing ring material disclosed by the invention, the problems of poor sealing effect and weak acid corrosion resistance of a traditional sealing strip of a bipolar plate at low temperature in the prior art can be effectively solved.

The invention discloses a characterization method and application of C3-alkylphenol potential new pollutants, and relates to the technical field of environmental detection.The characterization method comprises the steps that according to the petroleum content range in a sample, a corresponding sample pretreatment process is selected to prepare a sample; under a methanol-ammonia water mobile phase system and a methanol + acetonitrile-ammonia water mobile phase system, detecting a standard sequence sample, a conversion factor calibration sample and the sample by utilizing LC-MS, collecting primary mass spectrum full-scanning data, and respectively calculating the concentration of a first component and the standardized concentration of a co-flowing second component; and a conversion factor of a corresponding substance in the second component; and calculating the concentrations of 4-isopropyl phenol, 2, 4, 5-trimethylphenol and 3-propyl phenol, and further calculating the concentrations of other substances in the sample. According to the present invention, the LC-MS combination technology is adopted, the first-stage mass spectrum full scanning data is collected, the quantitative characterization of the 12 C3-alkyl substituted phenol single components in the oil-containing wastewater is achieved, the detection limit is less than 1.0 [mu] g / L, and the method has advantages of high sensitivity and good accuracy.

The invention relates to the technical field of organic chemistry, in particular to a preparation device and a preparation method of N-isopropyl-N '-phenyl p-phenylenediamine. The device provided by the invention comprises a reaction unit A and a separation unit B which are sequentially connected, the reaction unit is provided with an acetone and RT base inlet; the reaction unit is sequentially provided with a water absorption unit A-1 filled with a water absorbent and a hydrogenation unit A-2 filled with a noble metal catalyst along the flowing direction of the acetone and RT base mixed solution; the water absorption unit and the hydrogenation unit are arranged in the same reactor. Through the technical scheme, the IPPD preparation device and the preparation method provided by the invention can effectively inhibit side reactions, improve the selectivity of IPPD, simplify the post-treatment purification process and effectively improve the purity of the product, and the purity of the prepared IPPD is greater than 96 wt% and can be greater than 99 wt% at most.

This invention describes a method for treating wastewater, waste air, and hydrocarbon-containing liquid and gas streams from cumene / phenol complexes. The various effluent streams are combined in suitable collection containers, including waste air separators, hydrocarbon buffer containers, fuel gas separators, phenolic water containers, and non-phenolic water containers. The streams from these containers are then fed to a thermal oxidation system.

This invention discloses a hydrogenolysis catalyst, its preparation method, and its application. The catalyst comprises a support and an active component, the active component being distributed on the surface and interior of the support. Based on a total content of 100 wt% for the support and active component, the bulk active component content of the catalyst is 0.01–5 wt%, and the surface active component content is 0.005–3 wt%. The catalyst of this invention can be used to treat the hydrogenolysis products of α,α-dimethylbenzyl alcohol, especially the heavy components such as cumene. Specifically, the hydrogenolysis catalyst can hydrogenolyze cumene, which has a boiling point similar to that of the high-value-added byproduct acetophenone, to produce cumene with a lower boiling point, maximizing the retention of acetophenone. High-purity acetophenone can be obtained in subsequent distillation columns, effectively reducing the cost of later byproduct separation and possessing high industrial application value.

The invention belongs to the field of green chemical industry, and particularly relates to a preparation method of p-isopropylbenzaldehyde. The method comprises the following steps: putting benzene, a solid acid catalyst, a liquid acid catalyst and a cocatalyst transition metal chloride into a reactor, introducing CO gas, slowly injecting isopropyl chloride under a stirring condition, reacting for 0.5-12 hours, after the reaction is finished, cooling a reaction mixture, quenching with ice water, separating, extracting, and carrying out reduced pressure distillation to obtain p-isopropylbenzaldehyde, the solid acid catalyst is AlCl3. The method disclosed by the invention has relatively high selectivity on the p-isopropylbenzaldehyde, the benzene conversion rate can be more than or equal to 90%, and the selectivity on the p-isopropylbenzaldehyde is more than or equal to 70%. The method has the advantages of easily available raw materials, few process steps, high conversion rate, high product yield and few byproducts, and has remarkable economic and environmental benefits.

This invention relates to the field of organic synthesis technology and discloses a method for preparing N-isopropyl-N'-phenyl-p-phenylenediamine. The method includes the following steps: acetone, 4-aminodiphenylamine, and hydrogen are reacted in a primary reaction in the presence of a first noble metal catalyst; then, the mixture obtained after the primary reaction is subjected to a secondary reaction in the presence of a second noble metal catalyst; wherein the temperature of the primary reaction is 20-70°C higher than the temperature of the secondary reaction, and the temperature of the primary reaction is 60-100°C, while the temperature of the secondary reaction is 20-60°C. This method utilizes a noble metal catalyst in a fixed-bed staged catalytic synthesis of the antioxidant N-isopropyl-N'-phenyl-p-phenylenediamine, which improves the raw material conversion rate and reduces side reactions between acetone and N-isopropyl-N'-phenyl-p-phenylenediamine, thereby improving product quality.

The application discloses a preparation method of a dialkyl arene compound, which comprises the following steps: an optional step (1), alkylating an arene compound with an olefin to obtain an alkyl arene, and a step (2), disproportionating the alkyl arene in a disproportionation rectifying tower in the presence of optional hydrogen to obtain the dialkyl arene compound, wherein the disproportionation rectifying tower is filled with a disproportionation catalyst for catalyzing the disproportionation reaction. The application particularly discloses a preparation method of diisopropyl benzene and diisopropyl naphthalene. When the corresponding dialkyl arene compound is prepared by adopting the method, the selectivity is high, the yield is greatly improved, the occurrence of a side reaction is reduced, and the service life of a catalyst is prolonged.

The invention provides a post-treatment method and a post-treatment device for producing epoxypropane by a cumyl benzene co-oxidation method, and the post-treatment method comprises the following steps: separating an epoxidation reaction liquid obtained by reacting cumyl hydroperoxide with propylene in separation equipment, a crude product of epoxypropane and a separation solution containing 2-phenyl-2-propanol are obtained; mixing the separation liquid with hydrogen, introducing the mixture into a hydrogenation reactor, and carrying out catalytic hydrogenation reaction under the action of a hydrogenation catalyst, so that the 2-phenyl-2-propanol in the separation liquid is converted into isopropyl benzene; and after the catalytic hydrogenation reaction, a reducing impurity removal agent is introduced from the side surface of the hydrogenation reactor. The post-treatment method is beneficial to improving the conversion rate and selectivity of the hydrogenation reaction of the 2-phenyl-2-propanol, prolonging the service life of the hydrogenation catalyst and reducing the production and operation cost.