Abstract: A method for collecting an object material from a solution, which comprises the following steps: a step of adding a second solvent to a solution composed of an object material to be collected and a first solvent, then mixing therewith to form an emulsion containing the object material in a state under which the emulsion is not uniformly dissolved in the second solvent, in the second solvent; and a step of separating thus obtained emulsion from the solution.

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 method for collecting an object material from a solution, which comprises the following steps: a step of adding a second solvent to a solution composed of an object material to be collected and a first solvent, then mixing therewith to form an emulsion containing the object material in a state under which the emulsion is not uniformly dissolved in the second solvent, in the second solvent; and a step of separating thus obtained emulsion from the solution.

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 for hydrogenating an olefin, which comprises upwardly passing a liquid containing an olef in and a gas containing hydrogen through a packed bed of a solid hydrogenation catalyst, wherein the superficial velocity of the gas is 3.0 cm/sec or more.

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: A process for recovering cumene, characterized by subjecting 2,3-dimethyl-2,3-diphenylbutane produced in a process in which cumene is used, to hydrogenolysis in the presence of a catalyst thereby to convert it into cumene, and recovering the cumene.

Abstract: A method for recovering propylene oxide, which comprises separating propylene oxide from a liquid mixture containing propylene oxide, cumene and cumyl alcohol through distillation using a distillation column, wherein the bottom temperature of the distillation column is 190° C. or lower.

Abstract: A process for producing purified propylene oxide comprising:

Abstract: A process for recovering cumene, characterized by subjecting 2,3-dimethyl-2,3-diphenylbutane produced in a process in which cumene is used, to hydrogenolysis in the presence of a catalyst thereby to convert it into cumene, and recovering the cumene.

Abstract: A process for producing an oxirane compound from an organic peroxide other than ethylbenzene hydroperoxide and an olefin in the presence of an immobilized catalyst bed, wherein the process satisfies the following conditions (1) to (4): (1) the catalyst bed is divided into n catalyst beds and the catalyst beds are used in series, wherein n is an integer of 2 or more, (2) a fresh organic peroxide is divided into portions, which are supplied to respective inlets of the catalyst beds, (3) a fresh olefin is supplied to the inlet of the first catalyst bed, and (4) the reaction mixture discharged from each outlet of respective catalyst beds excluding the final catalyst bed is supplied to the inlet of the subsequent catalyst bed.

Abstract: A process for producing an oxirane compound from an organic peroxide other than ethylbenzene hydroperoxide and an olefin in the presence of an immobilized catalyst bed, wherein the process satisfies the following conditions (1) to (4):

Abstract: Olefin polymers are produced by a process which comprises homopolymerizing or copolymerizing olefins in the presence of a catalyst system comprising:(A) a solid catalyst component containing a trivalent titanium compound, which is obtained by reducing a titanium compound represented by the general formula Ti(OR.sup.1).sub.n X.sub.4-n (wherein R.sup.1 is a hydrocarbon group having 1 to 20 carbon atoms, X is a halogen atom and n is a number satisfying 0<n.ltoreq.4) with an organo magnesium compound and then treating the resulting solid product with a mixture of an ether compound and titanium tetrachloride, and(B) an organo aluminum compound.The above-mentioned reducing of a titanium compound with an organo magnesium compound may be performed in the presence of an organo silicon compound having Si-O bonds.

Abstract: Olefin polymers are produced by a process which comprises homopolymerizing or copolymerizing olefins in the presence of a catalyst system comprising:(A) a solid catalyst component containing a trivalent titanium compound, which is obtained by reducing a titanium compound represented by the general formula Ti(OR.sup.1).sub.n X.sub.4-n (wherein R.sup.1 is a hydrocarbon group having 1 to 20 carbon atoms, X is a halogen atom and n is a number satisfying 0<n.ltoreq.4) with an organo magnesium compound and then treating the resulting solid product with a mixture of an ether compound and titanium tetrachloride, and(B) an organo aluminum compound.The above-mentioned reducing of a titanium compound with an organo magnesium compound may be performed in the presence of an organo silicon compound having Si--O bonds.

Abstract: A catalyst comprising:(A) a solid catalyst component containing a tri-valent titanium compound, which is obtained by reducing a titanium compound represented by the general formula Ti(OR.sup.1).sub.n X.sub.4-n (wherein R.sup.1 is a hydrocarbon group having 1 to 20 carbon atoms, X is a halogen atom and n is a number satisfying 0<n.ltoreq.4) with an organo magnesium compound in the presence of an organo silicon compound having Si-O bonds and then treating the resulting solid product with an ester compound and a mixture of an ether compound and titanium tetrachloride,(B) an organo aluminum compound, and(C) a silicon compound having Si--OR.sup.2 bonds (wherein R.sup.2 is a hydrocarbon group having 1 to 20 carbon atoms) and/or an organic carboxylic acid ester,and a process for producing .alpha.-olefin polymers using the same.

Abstract: A catalyst comprising:(A) a solid catalyst component containing a tri-valent titanium compound, which is obtained by reducing a titanium compound represented by the general formula Ti(OR.sup.1).sub.n X.sub.4-n (wherein R.sup.1 is a hydrocarbon group having 1 to 20 carbon atoms, X is a halogen atom and n is a number satisfying 0<n.ltoreq.4) with an organo magnesium compound in the presence of an organo silicon compound having Si--O bonds and then treating the resulting solid product with an ester compound and a mixture of an ether compound and titanium tetrachloride,(B) an organo aluminum compound, and(C) a silicon compound having Si--OR.sup.2 bonds (wherein R.sup.2 is a hydrocarbon group having 1 to 20 carbon atoms) and/or an organic carboxylic acid ester,and a process for producing .alpha.-olefin polymers using the same.