Abstract: A process for producing propylene oxide, which comprises the following steps: oxidation step: a step of obtaining cumene hydroperoxide by oxidizing cumene; epoxidation step: a step of obtaining propylene oxide and cumyl alcohol by reacting cumene hydroperoxide obtained in the oxidation step with propylene; and conversion step: a step of obtaining cumene by subjecting cumyl alcohol obtained in the epoxidation step to hydrogenation-containing reaction and recycling the cumene to the oxidation step, wherein a concentration of 1,2-epoxy-2-phenylpropane contained in the reaction mixture after the oxidation step, is 1% by weight or less.

Abstract: A process for purifying propylene oxide, which comprises washing propylene oxide containing aldehydes and subsequently contacting an aqueous phase obtained with an extractant.

Abstract: The invention relates to a method for producing chiral organic compounds by asymmetric catalysis, using ionic catalysts comprising a chiral catalyst anion. The claimed method is suitable for reactions which are carried out over cationic intermediate stages, such as iminium ions or acyl pyridinium ions. The invention enables the production of chiral compounds with high ee values, that until now could only be obtained by means of costly purification methods.

Abstract: A method for producing propylene oxide in which the concentration of an organic peroxide in a reaction solution after an epoxidation step is from 20 to 5,000 ppm by weight based on the amount excluding propylene in the reaction solution, the method comprising an epoxidation step of reacting an organic peroxide with propylene in the presence of a catalyst to obtain propylene oxide and an alcohol, a propylene recovery step of recovering the unreacted propylene in the epoxidation step and recycling the resulting propylene as a raw material of the epoxidation step, and a propylene oxide purification step of distilling the propylene oxide obtained in the epoxidation step to obtain purified propylene oxide.

Abstract: Provided is a method for storing a high active titanium-containing silicon oxide catalyst, characterized in that the catalyst is stored at a relative humidity of 60% or less. The method can be used for a reaction, for example, wherein an oxirane compound is prepared from hydroperoxide and olefinic compound, even after the catalyst has been stored for a long period of time. The titanium-containing silicon oxide catalyst can be suitably employed as a catalyst satisfying the following requirements: (1) an average pore diameter is 10 ? or more, (2) the pores accounting for 90% or more of the total pore volume have a pore diameter of 50 to 200 ?, and (3) a specific pore volume is 0.2 cm cm3/g or more.

Abstract: A method for continuously producing propylene oxide, which comprises supplying an organic peroxide and propylene to an epoxidation reactor in which a solid catalyst for epoxidation is packed, thereby subjecting them to an epoxidation reaction, the method having a propylene pre-treatment step described below: propylene pre-treatment step; a step of treating at least a part of propylene supplied to the epoxidation reactor, which comprises removing an oxygen-containing organic compound contained in propylene.

Abstract: A process for the production of cumene, which comprises producing cumene from cumyl alcohol and hydrogen with a dehydration catalyst and a hydrogenation catalyst, wherein the dehydration catalyst and hydrogenation catalyst are alternately packed so as to form n layers (n is an integer of 3 or more) or are packed as a mixture thereof in a reactor.

Abstract: A process to recover optically active epoxy alcohols from asymmetric epoxidation reaction mixtures such as those produced using the Sharpless method of epoxidation of allylic alcohols. The process includes adding a reducing agent to reduce an organic hydroperoxide in the asymmetric epoxidation reaction product to a corresponding alcohol to form a reduced epoxidation reaction mixture; adding the reduced reaction product to a film evaporation unit to form a residue fraction and an optically active epoxy alcohol distillate fraction; and distilling the optically active epoxy alcohol distillate fraction to purify the optically active epoxy alcohol.

Abstract: The present invention relates to a catalyst based on ruthenium complexes and to a process for the asymmetric epoxidation of olefins using catalysts based on ruthenium complexes.

Abstract: Process for the continuous recirculation of the olefin which has not been reacted in the oxidation of olefins by means of hydroperoxide to give oxiranes and is present in the offgas stream formed during the oxidation, which comprises the steps (i) to (iii) (i) separating the olefin from the offgas stream by absorption in a hydrocarbon, (ii) desorbing the olefin from the hydrocarbon, (iii) recirculating the olefin obtained in step (ii) to the oxidation process.

Abstract: Dispersion containing pyrogenic silicon-titanium mixed oxide powders with a silicon dioxide content of 75 to 99.99 wt.-% and a titanium dioxide content of 0.01 to 25 wt. %, water and a basic, quaternary ammonium compound, wherein the mean aggregate diameter of the particles of the silicon-titanium mixed oxide powder in the dispersion is 200 nm at most. Process for the production of a titanium-containing zeolite with the use of the dispersion.

Abstract: Process for the catalyzed reaction of an organic compound with a hydroperoxide in at least one reactor using at least two different zeolite catalysts, wherein at least two of the different zeolite catalysts are used physically separately from one another.

Abstract: A process for producing ?-methylstyrene from cumyl alcohol via dehydration in the presence of activated alumina, wherein a concentration of propylene oxide contained in a raw material containing cumyl alcohol is 10 to 1000 ppm by weight.

Abstract: A process for producing propylene oxide, which comprises the following steps below, and a step for removing alcohols of the carbon number of 2 to 3, cyclohexanol and/or isopropylcyclohexane outside of the reaction system in at least one place of the steps or between which the steps are connected: oxidation step: a step of obtaining cumene hydroperoxide by oxidizing cumene; epoxidation step: a step of obtaining propylene oxide and cumyl alcohol by reacting cumene hydroperoxide obtained in the oxidation step with propylene in an excess amount in a liquid in the presence of a solid catalyst; and hydrogenolysis step: a step of obtain cumene by subjecting cumyl alcohol obtained in the epoxidation step to hydrogenolysis, and recycling the cumene to the oxidation step as the raw material for the oxidation step.

Abstract: A process for producing cumene by subjecting cumyl alcohol to hydrogenolysis or hydrogenation subsequent to dehydration, which comprises using a palladium-based catalyst as a catalyst for the hydrogenolysis or the hydrogenation, and using hydrogen having a carbon monoxide concentration of 0.1 to 10% by volume as hydrogen.

Abstract: A process for producing propylene oxide, which comprises the following steps: oxidation step: a step of obtaining cumene hydroperoxide by oxidizing cumene; epoxidation step: a step of obtaining propylene oxide and cumyl alcohol by reacting cumene hydroperoxide obtained in the oxidation step with propylene; and converting step: a step of converting cumyl alcohol obtained in the epoxidation step into cumene in the presence of a solid catalyst and recycling said cumene to the oxidation step, wherein a concentration of methylbenzyl alcohol in a liquid containing cumene recycled to the oxidation step, is 1% by weight or less.

Abstract: Process for manufacturing an oxirane by reaction between an olefin and a peroxide compound in a reactor containing a liquid phase, in the presence of water, one or more organic solvents, a catalyst and one or more compounds for increasing the selectivity of the catalyst toward epoxidation reactions, in which: if the process is performed in batchwise mode, the liquid phase present in the reactor when the reaction starts, if the process is performed continuously, all of the liquid phases that are fed continuously into the reactor has/have a total organic solvent content of at least 0.1 g/kg and of not more than 675 g/kg.

Abstract: A titanosilicate represented by the following compositional formula (1), wherein in the infrared absorption spectrum measured in the dehydrated state, the absorption spectrum has an absorption band having a relative maximum value at 930±15 cm?1: xTiO2.(1?x)SiO2??Compositional Formula (1) (wherein x is from 0.0001 to 0.2).

Abstract: A process for the preparation of alkylene oxide, which process involves passing a feed containing an organic hydroperoxide and alkene through a bank of at least two serially connected reactors containing epoxidation catalyst and withdrawing a product stream having alkylene oxide and an alcohol as reaction products, in which bank of reactors the temperature of the feed is controlled such that during operation the outlet temperature of the final reactor is at least 4° C. higher than the outlet temperature of the first reactor.

Abstract: Process for the preparation of alkylene oxide which process comprises contacting organic hydroperoxide and alkene with a heterogeneous epoxidation catalyst and withdrawing a product stream comprising alkylene oxide and an alcohol as reaction products, in which process fresh catalyst is contacted with feed having a higher molar ratio of alkene to organic hydroperoxide than the molar ratio of normal operation.

Abstract: The invention relates to a process for the preparation of an epoxidation catalyst which process involves (a) drying a silica gel carrier having a weight average particle size of from 0.1 mm to 2 mm at a temperature of from more than 200° C. to 300° C., and (b) contacting the carrier obtained in step (a) with a gas stream containing titanium halide to obtain an impregnated carrier, and the use of such catalyst in the preparation of alkylene oxide.

Abstract: The invention relates to a process for the preparation of a titanium catalyst which process comprises: (a) drying a silica carrier at a temperature of from 300 to 800° C. to obtain a dried carrier; (b) contacting the dried carrier obtained in step (a) with a gas stream containing titanium halide at a temperature in the range from 125° C. lower to 125° C. higher than the drying temperature of step (a) and at a pressure higher than 0.8 bar to obtain an impregnated carrier; (c) calcining the impregnated carrier obtained in step (b) to obtain the titanium catalyst.

Abstract: A process of preparing an olefin oxide, preferably propylene oxide, and an alcohol, such as ?-ethylphenyl alcohol, the process involving contacting an olefin, such as propylene, and an organic hydroperoxide, such as ethylbenzene hydroperoxide, in the presence of an epoxidation catalyst, preferably, a homogeneous molybdenum catalyst, in a single reactor system or in a multi-reactor system containing a plurality of sequentially interconnected reactors. Each reactor in the single or multi-reactor system is preferably divided into a plurality of reaction zones designed to facilitate plug flow behavior. The olefin is fed to a first reaction zone in the single reactor system or to a first reactor in the multi-reactor system. The organic hydroperoxide feed is split into a plurality of split organic hydroperoxide feedstreams, and the split feedstreams are distributed throughout the reaction zones, or the reactors, or both.

Abstract: A process for the recovery of molybdenum catalyst from the epoxidation reaction product of olefins with organic hydroperoxides. The active form of the glycol-molybdate epoxidation catalyst is removed from the process stream with an anion ion exchange resin. The ion exchange resin can be either a weak base or strong base type. The preferred embodiment of the invention produces a concentrated epoxidation catalyst in the “ammonium” form that is suitable for recycle to the catalyst preparation vessel. The ammonia form is converted into the active form by evaporating the water and ammonia from the recovered catalyst in the presence of a glycol. The preferred configuration of the ion exchange process is a “Lead-Lag” system. Two vessels will be in service while the third is in the regeneration mode recovering the epoxidation catalyst. A fourth polishing vessel can also be included as a “guard bed” to prevent leakage of the molybdate catalyst into the process stream.

Abstract: The present invention relates to the synthesis of chiral epoxides via a catalytic asymmetric oxidation of olefins. Additionally, the methodology provides a method of asymmetrically oxidizing sulfides and phosphines. This asymmetric oxidation employs a catalyst system composed of a metal and a chiral bishydroxamic acid ligand, which, in the presence of a stoichiometric oxidation reagent, serves to asymmetrically oxidize a variety of substrates.

Abstract: A process for preparing an alkylene oxide, which process comprises: (i) oxidizing an alkylbenzene to obtain a stream comprising alkylbenzene hydroperoxide, (ii) contacting at least part of the alkylbenzene hydroperoxide obtained in step (i) with an olefin to obtain a product stream comprising an alkylene oxide (iii) separating alkylene oxide compound from the product stream of step (ii) to obtain (a) a residual product stream comprising alkylphenyl alcohol, and (b) alkylene oxide, (iv) feeding at least a part of the residual product stream comprising alkylphenyl alcohol to a reactor having a catalytic distillation zone, and concurrently in the reactor, (a) contacting the residual product stream comprising alkylphenyl alcohol with hydrogen in the catalytic distillation zone to convert the alkylphenyl alcohol in the residual product stream to alkylbenzene and form a reaction mixture, and (b) separating alkylbenzene from the reaction mixture by fractional distillation, (v) withdrawing a stream comprising a

Abstract: Disclosed is a process for oxidizing organic compounds using hydrogen peroxide to oxidize an oxidizable organic substrate in the presence of a silylated peroxide-activating metal/silica-containing catalyst and to a method of preparing such a catalyst.

Abstract: The present invention relates to a biphasic process for the epoxidation of an organic compound by organic compound by organic hydroperoxide. More particularly, the present invention relates to a biphasic process for the epoxidation of an organic compound by organic hydroperoxide to the corresponding epoxide, using chromate or dichromate anions as the catalyst in aqueous medium.

Abstract: Titanium or vanadium zeolites are pretreated by contacting with an amino polyacid compound, such as ethylenediaminetetraacetic acid or a salt thereof, prior to use in olefin epoxidation with hydrogen peroxide.

Abstract: A process for producing cumene, characterized by preparing a copper-based catalyst by reducing a copper-based catalyst precursor containing copper in an oxidized state with hydrogen in liquid cumene, and subjecting cumyl alcohol to hydrogenolysis in the presence of the copper-based catalyst, and a process for producing propylene oxide which includes that process.

Abstract: A process for the purification of a crude propene oxide containing methanol and acetaldehyde by a continuously operated extractive distillation using an extraction solvent lowering the volatility of methanol and feeding a compound containing an unsubstituted NH2 group capable of reacting with acetaldehyde to a distillation column at a point above the feeding point of the crude propene oxide to give a purified propene oxide containing less than 100 ppm methanol and less than 100 ppm acetaldehyde. There is also disclosed a process for the catalytic epoxidation of propene that includes this purification stage.

Abstract: A process and catalyst for preparing organic hydroperoxides by oxidizing hydrocarbon compounds in the presence of an oxygen-containing gas and a catalyst containing a transition metal on a solid support.

Abstract: A process for producing purified propylene oxide comprising: first to sixth steps below, and using heat of reaction generated in the first and/or second steps as a heat source for rectification in the fifth step and/or a heat source for rectification in the sixth step: first step: a step of obtaining cumene hydroperoxide trough oxidation of cumene, second step: a step of obtaining propylene oxide and cumyl alcohol by reacting cumene hydroperoxide with propylene in the presence of an epoxidation catalyst, third step: a step of separating into a fraction (2) containing crude propylene oxide and a fraction (3) containing crude propylene by subjecting an outlet liquid (1) of the second step to rectification, fourth step: a step of obtaining a fraction (4) containing crude propylene oxide and a fraction (6) containing cumyl alcohol by subjecting the fraction (2) to rectification, fifth step: a step of obtaining a fraction (7) containing purified propylene oxide by subjecting the fraction (4) to rectification, a

Abstract: An organic compound having at least one C—C double bond is epoxidized by means of hydrogen peroxide in the presence of at least one catalytically active compound and at least one solvent, wherein a product mixture comprising ?-hydroperoxyalcohols is reduced using at least one reducing agent.

Abstract: Process for preparing alkylaryl hydroperoxide containing product, which process comprises: (a) oxidation of an alkylaryl compound to obtain reaction product containing alkylaryl hydroperoxide, (b) contacting with water at least part of the alkylaryl hydroperoxide containing reaction product obtained in step (a) which reaction product contains less than 0.05 % wt of sodium, (c) separating the product of step (b) into a hydrocarbonaceous phase containing alkylaryl hydroperoxide and an aqueous phase, (d) optionally repeating process steps (b) and (c) one or more times, (e) contacting at least part of the hydrocarbonaceous phase containing alkylaryl hydroperoxide obtained in step (c) or (d) with olefin and catalyst to obtain alkylaryl hydroxide and oxirane compound, and (f) separating at least part of the oxirane compound from the alkylaryl hydroxide.

Abstract: The present invention relates to an oxidation reaction catalyzed by a reaction controlled phase-transfer catalyst having the general formula of [R1R2R3R4N]xHy[A] or QmMO3(L). The catalysts themselves are not soluble in the reaction medium, but can form an active species that is soluble in the reaction medium under the action of one of the reactants. The active species can in turn react selectively with another reactant. When one of the reactants is completely consumed, the catalyst will separated out from the reacting system and can be recovered by means of simple separation method. The recovered catalyst can be recycled with comparable efficiency as that of the original catalyst. The separation of said catalyst is similar to that of heterogeneous catalyst while said catalyst will completely exhibit the characteristics of homogeneous catalyst during the reaction.

Abstract: The present invention relates to a process for the liquid phase epoxidation of a normally liquid olefinic compound to corresponding organic epoxide compound using aqueous or anhydrous organic hydroperoxide as an oxidizing agent in the presence of a supported nano-gold catalysts at the effective organic hydroperoxide/olefinic compound mole ratio, catalyst/olefinic compound weight ratio and temperature to yield the epoxide.

Abstract: Optically active fluorine-containing compounds of the formula (1): or of formula (2): are used for producing optically active 3,3,3-trfluoro-2-hydroxy-2-methylpropionic acids.

Abstract: This invention refers to a new zeolitic material included under the ITQ-16 denomination, to the method for obtaining them and their use as catalysts. This material, ITQ-16 zeolite, is characterized by having different ratios of the different polymorphs A, B and C described as possible intergrowths in Beta zeolite and which, therefore, show different X-ray diffraction patterns to that described for Beta zeolite, showing the X-ray diffraction pattern for ITQ-16, as it is synthesised, diffraction peaks at 2? angles of 6.9°, 7.4°, and 9.6°, simultaneously. ITQ-16 zeolite in its calcinated form has the following empiric formula: x(M1/nXO2):tTO2:gGeO2:(1?g)SiO2 where T is one or various elements with +4 oxidation status, different of Ge and Si; X is one or various elements with +3 oxidation status and M can be H+ or one or various inorganic cations with charge +n, t is comprised between 0 and 0.1, g is comprised between 0.001 and 0.33 and x is comprised between 0 and 0.2.

Abstract: A material especially useful for the selective oxidation of hydrocarbons and other organic compounds includes a non-crystalline, porous inorganic oxide having at least 97 volume percent mesopores based on micropores and mesopores, and at least one catalytically active metal selected from the group consisting of one or more transition metal and one or more noble metal.

Abstract: The invention relates to a process for converting 1-phenylethanol into styrene, which process involves: (1) contacting a feed containing 1-phenylethanol, organic acid and 2-phenylethanol with a catalyst to obtain a product containing styrene, and (2) removing ester compounds based on 2-phenylethanol and organic acid from the product of step (1), in which process the feed of step (1) has a molar ratio of organic acid to 2-phenylethanol of at least 1:10.

Abstract: The invention relates to a process for the preparation of propylene oxide and an alkenyl aryl, which process involves: (1) reacting an alkyl aryl hydroperoxide with propene to yield propylene oxide and an aryl alcohol; and, (2) contacting, at elevated temperature, feed containing the aryl alcohol obtained in step (1) with a heterogeneous dehydration catalyst to yield an alkenyl aryl, in which process the feed of step (2) has at most 0.30% wt of compounds having a molecular weight of at least 195.

Abstract: A titanium-containing silicon oxide molded catalyst satisfying all of the following conditions (1) to (4): (1) an average pore diameter is 10 ? or more, (2) 90% or more of the whole pore volume have pore diameters of 5 to 200 ?, (3) a specific pore volume is 0.2 cm3/g or more, and (4) it is obtained by using as a template a quaternary ammonium ion of the following general formula (I) or an amine of the following general formula (II), then, removing the template. [NR1R2R3R4]+??(I) (in the formula (I), R1 represents a linear or branched hydrocarbon group having 2 to 36 carbon atoms, and R2 to R4 represent an alkyl group having 1 to 6 carbon atoms.) NR5R6R7??(II) (in the formula (II), R5 represents a linear or branched hydrocarbon group having 2 to 36 carbon atoms, and R6 and R7 represent hydrogen or an alkyl group having 1 to 6 carbon atoms.).

Abstract: Process for manufacturing oxirane by reaction of an olefin with a peroxide compound in the presence of a catalyst and a solvent in at least two reactors arranged in series, each of which contains a portion of catalyst, according to which the peroxide compound is introduced only into the first reactor, the subsequent reactor(s) not being fed with fresh peroxide compound, but only with the peroxide compound which is present in the medium obtained from the preceding reactor and which was not consumed in this preceding reactor.

Abstract: A continuous process for the epoxidation of olefins with hydrogen peroxide in the presence of a heterogeneous catalyst promoting the epoxidation reaction, whereby the aqueous reaction mixture contains i) an olefin; ii) hydrogen peroxide; iii) less than 100 wppm of alkali metals, earth alkali metals, both irrespective whether in ionic, complex or covalently bonded form, bases or cations of bases having a pkB of less than 4.5, or combinations thereof; and, iv) at least 100 wppm of bases or cations of bases having a pkB of at least 4.5 or combinations thereof, whereby the wppm are based on the total weight of hydrogen peroxide in the reaction mixture.

Abstract: A process for producing purified propylene oxide comprising:

Abstract: A process for producing propylene oxide, which comprises the following steps below, and a step for removing alcohols of the carbon number of 2 to 3, cyclohexanol and/or isopropylcyclohexane outside of the reaction system in at least one place of the steps or between which the steps are connected:

Abstract: A process of preparing an olefin oxide, preferably propylene oxide, and an alcohol, such as &agr;-ethylphenyl alcohol, the process involving contacting an olefin, such as propylene, and an organic hydroperoxide, such as ethylbenzene hydroperoxide, in the presence of an epoxidation catalyst, preferably, a homogeneous molybdenum catalyst, in a single reactor system or in a multi-reactor system containing a plurality of sequentially interconnected reactors. Each reactor in the single or multi-reactor system is preferably divided into a plurality of reaction zones designed to facilitate plug flow behavior. The olefin is fed to a first reaction zone in the single reactor system or to a first reactor in the multi-reactor system. The organic hydroperoxide feed is split into a plurality of split organic hydroperoxide feedstreams, and the split feedstreams are distributed throughout the reaction zones, or the reactors, or both.

Abstract: The present invention relates to a process for the preparation of polyether polyols having an average molecular weight of at least 2000, in which the process involves (i) reacting an initiator with a crude alkylene oxide stream in the presence of a catalyst to obtain an intermediate product having an average molecular weight of from 200 to 1100; and (ii) reacting the intermediate product further with one or more alkylene oxides to yield polyether polyols.

Abstract: A process for producing cumene, characterized by preparing a copper-based catalyst by reducing a copper-based catalyst precursor containing copper in an oxidized state with hydrogen in liquid cumene, and subjecting cumyl alcohol to hydrogenolysis in the presence of the copper-based catalyst, and a process for producing propylene oxide which includes that process.