Patent application number | Description | Published |
20100029541 | METHOD OF RETAINING THE QUALITY OF 2-METHYL-3-(3,4-METHYLENEDIOXYPHENYL)PROPANAL AND PROCESS FOR PRODUCING THE SAME - The present invention relates to [1] a method for keeping a quality of 2-methyl-3-(3,4-methylenedioxyphenyl)propanal useful as a perfume, which comprises incorporating from 50 to 3000 ppm of 1-acetyl-3,4-methylenedioxybenzene in the 2-methyl-3-(3,4-methylenedioxyphenyl)propanal; [2] a process for producing 2-methyl-3-(3,4-methylenedioxyphenyl)propanal having a content range from 50 to 3000 ppm of 1-acetyl-3,4-methylenedioxybenzene; and [3] 2-methyl-3-(3,4-methylenedioxyphenyl)propanal having a content range from 50 to 3000 ppm of 1-acetyl-3,4-methylenedioxybenzene. | 02-04-2010 |
20100121085 | 2-METHYL-3-(3,4-METHYLENEDIOXYPHENYL)PROPANAL, AND METHOD FOR PRODUCTION THEREOF - Disclosed are: (1) a method for producing 2-methyl-3-(3,4-methylenedioxyphenyl)propanal, which comprises the step of providing a reaction mixture containing 1-acetoxy-2-methyl-3-(3,4-methylenedioxyphenyl)-1-propene by a process for reacting 1,2-methylenedioxybenzene with 2-methyl-3,3-diacetoxypropene or a process for reacting 1,2-methylenedioxybenzene, methacrolein and acetic anhydride with one another; subjecting the reaction mixture to hydrolysis or transesterification with an alcohol to provide a reaction mixture containing 2-methyl-3-(3,4-methylenedioxyphenyl)propanal; and purifying by distilling the reaction mixture, wherein a high boiling point compound contained in the reaction mixture is removed by a specific procedure; and (2) 2-methyl-3-(3,4-methylenedioxyphenyl)-propanal produced by the method, which has an acetic acid content of a less than 40 ppm, is useful as a perfume, and has a high purity. | 05-13-2010 |
20110065913 | PROCESS FOR PRODUCING LAUROLACTAM - The present invention relates to a process for producing laurolactam from cyclododecanone oxime by liquid-phase rearrangement reaction using trichlorotriazine as a rearrangement catalyst. The present invention can provide a process which can solve the problem of termination of the reaction at a certain conversion, can prevent an inactive precipitate generated from trichlorotriazine from precipitating in the course of the reaction process, and can remove an inactive precipitate, an active intermediate and a residual catalyst. | 03-17-2011 |
20110301361 | METHOD OF RETAINING THE QUALITY OF 2-METHYL-3-(3,4-METHYLENEDIOXYPHENYL) PROPANAL AND PROCESS FOR PRODUCING THE SAME - The present invention relates to [1] a method for keeping a quality of 2-methyl-3-(3,4-methylenedioxyphenyl)propanal useful as a perfume, which comprises incorporating from 50 to 3000 ppm of 1-acetyl-3,4-methylenedioxybenzene in the 2-methyl-3-(3,4-methylenedioxyphenyl)propanal; [2] a process for producing 2-methyl-3-(3,4-methylenedioxyphenyl)propanal having a content range from 50 to 3000 ppm of 1-acetyl-3,4-methylenedioxybenzene; and [3] 2-methyl-3-(3,4-methylenedioxyphenyl)propanal having a content range from 50 to 3000 ppm of 1-acetyl-3,4-methylenedioxybenzene. | 12-08-2011 |
20120071672 | PROCESS FOR PREPARING AROMATIC ALDEHYDE COMPOUND - An object of the present invention is to provide an industrially advantageous process for preparing a benzaldehyde compound from a benzyl alcohol compound with high yield. | 03-22-2012 |
20130046101 | METHOD OF RETAINING THE QUALITY OF 2-METHYL-3-(3,4-METHYLENEDIOXYPHENYL)PROPANAL AND PROCESS FOR PRODUCING THE SAME - The present invention relates to [1] a method for keeping a quality of 2-methyl-3-(3,4-methylenedioxyphenyl)propanal useful as a perfume, which comprises incorporating from 50 to 3000 ppm of 1-acetyl-3,4-methylenedioxybenzene in the 2-methyl-3-(3,4-methylenedioxyphenyl)propanal; [2] a process for producing 2-methyl-3-(3,4-methylenedioxyphenyl)propanal having a content range from to 3000 ppm of 1-acetyl-3,4-methylenedioxybenzene; and [3]2-methyl-3-(3,4-methylenedioxyphenylpropanal having a content range from 50 to 3000 ppm of of 1-acetyl-3,4-methylenedioxybenzene. | 02-21-2013 |
Patent application number | Description | Published |
20110192146 | MULTICYLINDER INTERNAL COMBUSTION ENGINE, INTER-CYLINDER AIR/FUEL RATIO IMBALANCE DETERMINATION APPARATUS, AND METHOD THEREFOR - A multicylinder engine includes: combustion chambers; fuel injection valves corresponding to the individual combustion chambers; an exhaust control catalyst; an upstream-side air/fuel ratio sensor disposed upstream of the exhaust control catalyst; and a downstream-side A/F sensor disposed downstream of the catalyst. A first abnormality determination-purpose rich A/F control of controlling the A/F of the mixture formed in each combustion chamber to an A/F richer than stoichiometric is executed when it needs to be determined whether the downstream-side A/F sensor is abnormal. An inter-cylinder A/F imbalance determination of estimating the A/F of the mixture in each combustion chamber based on the output of the upstream-side A/F sensor is executed when the first abnormality determination-purpose rich A/F control is being executed, and it is determined whether there is a difference between the estimated A/Fs of the mixtures. | 08-11-2011 |
20110231084 | ROTATIONAL FLUCTUATION MALFUNCTION DETECTION DEVICE AND ROTATIONAL FLUCTUATION MALFUNCTION DETECTION METHOD FOR INTERNAL COMBUSTION ENGINE - A rotational fluctuation malfunction detection device for an internal combustion engine determines that fluctuations in output shaft rotational speed are “normal” when a rotational fluctuation value, obtained in a “disturbance fluctuation state” is below threshold L1. If rotational fluctuation value obtained in “disturbance fluctuation state” equals or exceeds L | 09-22-2011 |
20120136552 | VEHICLE, ABNORMALITY DETERMINATION METHOD FOR INTERNAL COMBUSTION ENGINE, AND ABNORMALITY DETERMINATION DEVICE FOR INTERNAL COMBUSTION ENGINE - A vehicle including an internal combustion engine provided with a plurality of cylinders, and a control unit that determines that an abnormality of the internal combustion engine has occurred when an atmospheric pressure has a first value and an operation state represented by at least one of an output shaft revolution speed and a load of the internal combustion engine is within a preset region and determines that an abnormality of the internal combustion engine has occurred when the atmospheric pressure has a second value that is lower than the first value and the operation state is outside the region. | 05-31-2012 |
20120240669 | ABNORMALITY DETERMINATION APPARATUS AND ABNORMALITY DETERMINATION METHOD FOR MULTI-CYLINDER INTERNAL COMBUSTION ENGINE - An abnormality determination apparatus for a multi-cylinder internal combustion engine equipped with a duel-injection system that has two fuel systems for injecting and supplying fuel to each of cylinders, which determines whether there is an abnormal variation in air-fuel ratio among the cylinders, includes: an abnormal variation determining unit that determines whether there is an abnormal variation in a period during which fuel is separately injected by both the two fuel systems; and an abnormality estimating unit that estimates which one of the fuel systems has an abnormality on the basis of a fuel injection distribution ratio of both the fuel systems in the period. | 09-27-2012 |
20130197783 | AIR-FUEL RATIO IMBALANCE DETECTING DEVICE AND AIR-FUEL RATIO IMBALANCE DETECTING METHOD FOR INTERNAL COMBUSTION ENGINE - An air-fuel ratio imbalance detecting device for an internal combustion engine, which detects a rich imbalance in air-fuel ratio among a plurality of cylinders on the basis of a variation per unit time in air-fuel ratio that is detected by an air-fuel ratio sensor provided in an exhaust passage of the internal combustion engine, includes an electronic control unit that normalizes the variation per unit time in air-fuel ratio with a constant associated with a rotation speed and load factor of the internal combustion engine and that, when the normalized value is smaller than a predetermined threshold, determines that a rich imbalance in air-fuel ratio has been detected among the cylinders. | 08-01-2013 |
20130204511 | AIR-FUEL RATIO IMBALANCE DETECTING DEVICE AND AIR-FUEL RATIO IMBALANCE DETECTING METHOD FOR INTERNAL COMBUSTION ENGINE OF VEHICLE - When a detected value for detecting a rich imbalance in air-fuel ratio among cylinders in a state where an intake air amount of an engine falls within a low amount region is lower than a first threshold corresponding to the intake air amount and is higher than or equal to a second threshold corresponding to the intake air amount, an HV-ECU controls the engine such that the intake air amount falls within a high amount region, and controls a motor generator such that an electric power corresponding to a power increase amount is consumed. When the intake air amount falls within the high amount region, the HV-ECU detects a rich imbalance in air-fuel ratio among the cylinders by comparing the detected value with a third threshold corresponding to the intake air amount. | 08-08-2013 |