66 results about "Cumene" patented technology

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.

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 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 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 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 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 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.

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 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.

The application relates to the technical field of organic synthesis, in particular to a preparation method of C9H 12 O. The method is to use phenol and isopropyl alcohol as reaction raw materials, then heat under a protective atmosphere, and make the mixed reaction liquid pass through the surface of a catalyst to complete the reaction and obtain C9H 12 O. In the process, when the catalyst is a phosphate catalyst, isopropyl phenol is mainly synthesized; when the catalyst is an Al-P-O catalyst, ortho-isopropyl phenol and para-isopropyl phenol are mainly synthesized. The reaction has low preparation cost, is not easy to produce harmful substances, is an environmentally-friendly reaction path, and realizes green environmental protection and low cost of C9H 12 O production.

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.

This utility model relates to the field of alkaline washing tower technology and discloses an alkaline washing tower for cumene solvent. The alkaline washing tower includes a main body with a top cover and a column. The column is equipped with a feeding mechanism, and the main body is equipped with an alkaline washing mechanism for cumene solvent. The alkaline washing mechanism includes an alkaline washing component and a separation and drainage component. In the alkaline washing component, the sieve tray, liquid redistributor, and structured packing work together to ensure uniform and efficient mixing and reaction of the alkaline solution and cumene solvent, thereby improving the alkaline washing efficiency. The separation and drainage component separates the alkaline solution and cumene solvent according to their density differences through multiple partitions and an electrically controlled drainage valve, which is convenient for operation. The inner ends of the alkaline solution inlet and the cumene solvent inlet of the feeding mechanism are tangential, which promotes uniform liquid distribution. Compared with the prior art, this alkaline washing tower can solve the problems of insufficient mixing and incomplete alkaline washing, effectively improve the alkaline washing efficiency of cumene products, and improve the quality of cumene products. It has important application value in cumene production.

This invention discloses a method, system, and application for the recovery of cumene and the co-production of acetophenone. The method of this invention includes the following steps: (1) distilling a material to be treated containing cumene, phenol, and acetophenone, collecting cumene product from the top of the distillation column and collecting a heavy component I containing acetophenone from the bottom; (2) further distilling the heavy component I containing acetophenone, collecting a circulating stream from the top of the distillation column and optionally recycling it back to step (1) for distillation together with the material to be treated, collecting heavy component II from the bottom of the distillation column, and collecting acetophenone product from the side stream of the distillation column. The method for the recovery of cumene and the co-production of acetophenone provided by this invention can efficiently recover cumene while also efficiently recovering acetophenone, has the advantage of a simple process, and recovers a high-purity acetophenone product with low phenol content, which can significantly improve the technical and economic efficiency of the equipment.

The invention relates to the field of fuel oil, and discloses aviation gasoline and a preparation method thereof. The preparation method of the aviation gasoline comprises the steps that alkylated gasoline is rectified, the alkylated gasoline with the distillation range of 35-125 DEG C is taken as a component A, the component A, a component B and an optional additive are mixed, and the weight ratio of the component A to the component B in the aviation gasoline is 2-9; the component B contains isopentane and cumene, and the weight ratio of the isopentane to the cumene is 0.5-2. The aviation gasoline provided by the invention meets various indexes such as octane number, vapor pressure, distillation range and the like, greatly reduces the use amount of tetraethyl lead, and is environment-friendly.

The invention discloses a rubber synthetic material with a lubricating effect for mold cleaning and a preparation method of the rubber synthetic material, and relates to the technical field of preparation of rubber for mold cleaning. The support body comprises natural rubber, butyl rubber, precipitated white carbon black, stearic acid and other raw materials; the rubber cladding comprises ethylene propylene rubber, butyl rubber, precipitated white carbon black, a silane coupling agent, hydrogen-terminated polydimethylsiloxane, allyl polyethylene glycol, dicumyl peroxide and other raw materials; the lubricating rubber layer comprises natural rubber, butyl rubber, fumed silica, sodium tripolyphosphate, potassium carbonate, cumene hydroperoxide and other raw materials. The method comprises the following steps: preparing the support body by a mold forming method; preparing a rubber cladding in the mold; the supporting body is sleeved with the rubber wrapping layer. And the rubber skin is pressed on the surface of the rubber wrapping layer of the wrapping body while being hot. The air cavity structure is arranged in the supporting body, the exhausting and demolding functions are achieved, and the problems that in the prior art, air between rubber and the inner wall of a mold is not prone to being exhausted, and demolding is difficult are effectively solved.

The application relates to a preparation method of 4-(2-hydroxy-2-propyl) cumene hydrogen peroxide, which comprises carrying out an oxidation reaction on 4-isopropyl-alpha,alpha-dimethyl benzyl alcohol and an oxygen-containing gas in a nitrile solvent in the presence of a catalyst and an initiator, wherein the catalyst is selected from one or more of benzene dicarboximide compounds, and the initiator is selected from one or more of azo compounds. The preparation method provided by the application overcomes the problems of slow reaction speed, low reaction conversion rate and low product p-HHP yield in the prior art, and has the characteristics of easy availability of raw materials, high yield, cleanness and environmental protection, mild reaction condition and easy industrialization.

The present invention belongs to the technical application field of catalysts, and relates to a method for preparing 3-(3-isopropylphenyl)butyraldehyde. The method comprises the following steps: using m-isopropenyl cumene, an organic base and H2 as raw materials, adding a prepared rhodium catalyst having high activity and a corresponding phosphine ligand, and optimizing the reaction process to obtain 3-(3-isopropylphenyl)butyraldehyde with a high yield and high purity. The production method of the present invention involves simple steps, mild reaction conditions and high yield of obtained 3-(3-isopropylphenyl)butyraldehyde, achieves a solvent-free reaction, greatly saves costs, and is suitable for large-scale industrial production.

The present invention relates to a process for preparing bisphenol A in the presence of at least two impurities being selected from the group consisting of 2-methylbenzofurane, hydroxyacetone, alpha-methylstyrene, acetophenone, benzene and / or cumene without poisoning the catalyst system comprising an ion exchange resin catalyst and a sulfur containing cocatalyst, wherein at least part of the sulfur containing cocatalyst is not chemically bound to the ion exchange resin catalyst. Moreover, the present invention provides a process for preparing polycarbonate.