The hydroformylation of olefins with rhodium complex catalysts is described. The catalysts employed comprise a rhodium complex with at least one phosphine having a specified structure, e.g., tris(benzyl)phosphine. Preferred phosphines have a pKa in the range of about 3.5 up to 5.3 and a cone angle in the range of about 160 up to 195°. Hydroformylation reactions at relatively low temperatures and pressure and yet with high rates of reaction and high selectivity to aldehyde product are obtained by the practice of the present invention.

Low pressure rhodium catalyzed hydroformylation of olefins

A catalyst composition having high epoxidation activity and resistant to leaching of its metal comprises molybdenum, vanadium, tungsten and/or titanium complexed to an organic or inorganic support through the intermediacy of an imidazole ligand. The catalyst may be used in epoxidation of olefinic compounds.

Catalyst and process for the epoxidation of olefinic compounds

The invention relates to the use of (i) a compound of formula (I) or a (pharmaceutically) acceptable salt thereof or (ii) a mixture comprising one or more or consisting of two or more compounds of formula (I) and/or said salts wherein R1 denotes a radical in ortho-, meta, or para-position to the phenolic OH group, the radical being selected from the group consisting of E/Z-3-methylbut-1-en-1-yl, 3-methylbut-2-en-1-yl and 3-methylbut-3-en-1-yl and R2 denotes a radical in ortho-, meta, or para-position to the phenolic OH group, the radical being selected from the group consisting of H and alkyl groups with 1 to 3 C atoms as antimicrobial agent for inactivation of microorganisms, in particular for rapid inactivation of microorganisms, with the proviso that the use is not within a method for treatment of the human or animal body by surgery or therapy or within a diagnostic method practised on the human or animal body.

Phenol derivatives as antimicrobial agents

PURPOSE:To reduce the quantity of remaining hot water and to minimize the maintenance cost by a method wherein a supply of water to the electrical water heater is started in such a manner that the required power supply time calculated with respect to a predetermined quantity of hot water to be used ends at the time of termination of a midnight power supply. CONSTITUTION:The control device for the electrical water heater is provided with a hot water quantity setting means 9 adopted to predetermine the required quantity of hot water to be stored in a hot water storage tank 1, a temperature detecting means 6 for detecting the temperature of feed water and the heating temperature for the feed water, a power supply time operating means 10 for calculating the required power supply time for a heat generating body 2 from the required calorific value of hot water calculated by a calorific value operating means 9 on the bases of the set quantity of hot water and the detected temperatures obtained by the temperature detecting means 6, a power supply start control means 11 for starting the supply of power to the heat generating body on the midway of a midnight power supply time zone so that the required power supply time ends at the termination of the midnight power supply time and a power supply stop control means 13 for stopping the supply of power to the heat generating body when the feed water heating temperature obtained by the hot water temperature operating means 12 on the basis of the calorific value of hot water is reached, whereby when the user determines the required quantity of hot water, the midnight power is supplied in the latter half of the midnight power supply time zone and the maintenance cost is therefore minimized.

Control device for hot water storage type electrical water heater

PURPOSE:To enable laser marking with a simple construction at a high speed with high accuracy by mounting a device which positions a work in a small movable range at a high speed with high accuracy on a rough positioning device which moves over a wide range at a low speed. CONSTITUTION:A titled device consists of a positioning device 18 which moves over a wide range at a low speed and positions a work 6 with rough accuracy, a device 26 which is supported by said device 18 and positions the work in a small movable range at a high speed with high accuracy a driving device 23, a sensor 32 which measures the distance between said work and a condenser lens 12 and three control devices which hold the work 6 at the focal length of the lens 12. Said control devices drive the devices 18, 26 to perform marking operation and control the decive 23 by the feedback signal outputted from the sensor 32. The work 6 is marked at a high speed with high accuracy by the above- mentioned device.

Marking device with laser light

PURPOSE:To obtain the titled substance in high yield even at a relatively low pressure, by reacting CO with H2 in the presence of a catalyst consisting of a ruthenium compound, a rhenium compound and an iminium salt compound or a phosphonium salt compound, and having improved activity CONSTITUTION:CO is reacted with H2 in an aprotic polar solvent under heat and pressure conditions to give an alkane polyol In the process, the reaction is carried out in the presence of a catalyst consisting of (A) a ruthenium compound, (B) a rhenium compound and (C) an iminium salt compound or a phosphonium salt compound The concentrations of the respective components of the catalyst in the reaction system are as follows: 5-10 gram atoms/l expressed in terms of ruthenium atoms and rhenium atoms components (A) and (B), and 50- 10 moles/l component (C), eg a quaternary iminium halide or quaternary phosphonium halide The ratio of the component (B) to the component (A) is 10 -10 expressed in terms of metallic atoms in both

Preparation of alkane polyol

PURPOSE:Rhodium-imidazole complex of formula [I], (where L1 and L2 are ligands comprised olefins, diolefins or N-containing heterocyclic compounds?L2 is not always needed when L1 is a bidentate ligand; Lm is imidazole or its derivatives).

Process for preparing rhodiummimidazole complex

PURPOSE:To obtain the title compound useful as a new insecticide having an anti- juvenile hormone action readily in high yield, by dehydrocyclizing the compound prepared through reaction between a 3, 4-dialkoxyphenol and a conjugated diene. CONSTITUTION:A 3, 4-dialkoxyphenol, e.g. 3, 4-dimethoxy phenol, is reacted with a conjugated diene, preferably isoprene, in the presence of a catalyst comprising a rhodium compound, e.g. [Rh(COD)Im]3, and a tertiary phosphine compound, e.g. triphenylphosphine, to form a 2-(3-substituted buten-1-yl)-4, 5-dialkoxyphenol of formula II: (R and R are alkyl or alkenyl groups; R is H, alkyl, or alkenyl group), which is dehydrocyclized by reacting with a dehydrogenating agent, e.g. a quinone such as chloranil, in a solvent, or by bringing into contact with a dehydrogenation catalyst to form the objective compound.

Preparation of 6* 77dialkoxyy22alkylchromene

PURPOSE:To obtain the title compound useful as musk perfumes, in a simple process in high yield, by polymerizing a dibasic fatty acid with ethylene glycol in the presence of an aluminum compound having a carbonate radical, and by depolymeirzing and ring closure of the polymer in vacuo. CONSTITUTION:A basic aqueous solution of an aluminum compound, e.g. Al(OH)3, is brought into contact with CO2 gas or a substance which produces CO2 gas, to give an aluminum compound having a carbonate radical. A dibasic fatty acid of formula I: (n is an integer 6-14) or its ester is polymerized with ethylene glycol or ethylene oxide in the presence of the aluminum compound thus obtained at 50-250 deg.C, preferably 100-200 deg.C, and subjected to depolymerization and ring closure at 180-300 deg.C, preferably 240-280 deg.C, at a pressure of 10 - 10 mm Hg, preferably 10-1-l mm Hg, to give a large ring ethylenedioate of formula II.

Preparation of large ring ethylenedioate

PURPOSE:To obtain an inorganic oxide having uniform structure and fine and uniform particle diameter and useful for the production of functional ceramic, etc., by contacting precipitated inorganic hydroxide with a mixture of fresh water and a polar organic solvent. CONSTITUTION:An inorganic hydroxide such as perovskite-type hydroxide is produced by precipitating an inorganic hydroxide under irradiation with ultrasonic radiation. The obtained inorganic hydroxide is made to contact with a mixture of fresh water and a polar organic solvent (e.g. a 1-4C lower aliphatic alcohol or 1-4C ketone) to obtain the objective inorganic hydroxide having uniform structure.

Saeki Kenji

Papers

Preparation of alkane polyol

Process for preparing rhodiummimidazole complex

Preparation of 6* 77dialkoxyy22alkylchromene

Preparation of large ring ethylenedioate

Treatment of precipitate of inorganic hydroxide