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Inventor:
Matsumura; Yasuo
Address:
Yokohama, JP
No. of patents:
33
Patents:












Patent Number Title Of Patent Date Issued
6512152 Tetracyclododecene compositions and process for producing the same January 28, 2003
The present invention is drawn to a tetracyclododecene composition having a regulated cyclopentadiene trimer content, whereby addition polymerization with the aid of a Ziegler catalyst can be carried out while preventing gelation caused by a cross-linking reaction. A tetracyclododecene
6441249 Method for producing trimethylhydroquinone August 27, 2002
An inexpensive method for producing trimethylhydroquinone free from the problem of the disposal of waste catalyst, which method comprises the steps of: (1) reacting isophorone in the presence of an acid catalyst and recovering .beta.-isophorone by distiiulation, (2) oxidizing the .be
6380450 Process for producing indene April 30, 2002
Tetrahydroindene is dehydrogenated in a vapor phase in the presence of a metallic catalyst, e.g., a nickel-molybdenum catalyst, to produce indene, which is industrially useful in high yield while inhibiting the catalyst from suffering a decrease in activity. In particular, a higher yield
6320086 Method for producing trimethylhydroquinone November 20, 2001
An inexpensive method for producing trimethylhydroquinone free from the problem of the disposal of waste catalyst, which method comprises the steps of: (1) reacting isophorone in the presence of an acid catalyst and recovering .beta.-isophorone by distillation, (2) oxidizing the .bet
6211418 Method for producing trimethylhydroquinone April 3, 2001
An inexpensive method for producing trimethylhydroquinone free from the problem of the disposal of waste catalyst, which method comprises the steps of: (1) reacting isophorone in the presence of an acid catalyst and recovering .beta.-isophorone by distillation, (2) oxidizing the .bet
5723708 Method for producing cyclopentadienes March 3, 1998
A method for producing cyclopentadienes which comprises the step of cyclodehydration of an unsaturated carbonyl compound having a specific chemical structure in a vapor phase in the presence of a specific solid acid catalyst. The cyclopentadienes of the invention can be produced in a
5436402 Method for preparing p-isobutylstyrene July 25, 1995
A method for preparing a high-purity p-isobutylstyrene is here disclosed which comprises the first step of reacting o- and/or m-isobutylethylbenzene, if necessary, together with isobutylbenzene, in the presence of an acid catalyst in a liquid phase at a reaction temperature of -10.de
5425122 Synthetic resin optical transmission medium and its preparation method June 13, 1995
The present invention relates to provide a drawn optical transmission medium having excellent heat resistance and a continuous refractive index distribution in a good productivity at a low cost, and the disadvantages in a conventional synthetic resin optical transmission medium can be
5378776 Method for preparing optical polymer with radial transition in refractive index January 3, 1995
A method for preparing a polymer rod for optical transmission media. The process involves copolymerization of monomers having different boiling points by removal of monomer vapor during polymerization. The process results in a transition in refractive index along the radial direction of
5260477 Method for preparing alpha-(4-isobutylphenyl)propionic acid or its precursor November 9, 1993
A method for preparing .alpha.-(4-isobutylphenyl)propionic acid or its precursor is here disclosed which comprises a step (I) of dehydrogenating p-isobutylethylbenzene in a gaseous phase in the presence of a dehydrogenating metal catalyst to form p-isobutylstyrene and at least one un
5097061 Method for preparing .alpha.-(4-isobutylphenyl)propionic acid or its precursor March 17, 1992
A method for preparing .alpha.-(4-isobutylphenyl)propionic acid or its precursor is here disclosed which comprises a step A of forming p-isobutylstyrene from p-isobutylethylbenzene and a step B of forming .alpha.-(4-isobutylphenyl)propionaldehyde from p-isobutylstyrene or a step C of
5081279 Production of .alpha.-(3-benzoylphenyl)propionic acid derivative January 14, 1992
This invention provides a method of producing highly pure .alpha.-(3-benzoylphenyl)propionic acid derivatives, which are medicines per sec or which can easily afford the same, from readily available 3-ethylbenzophenone in a very simplified manner efficiently and economically. The met
5026939 Method for producing 4-isobutylstyrene June 25, 1991
A method for producing alkylstyrene which is characterized in that 1,2-di(substituted phenyl)ethane is brought into contact with an acid catalyst at 200.degree. C. to 650.degree. C. in the presence of an inert gas to crack it into alkylstyrene and alkylbenzene. The method of the inve
4999450 Process for preparing alpha-(3-benzylphenyl) propionic acid derivative March 12, 1991
A process for preparing .alpha.-(3-benzylphenyl)-propionic acid or its derivative, a precursor of ketoprofen (trade name), which comprises dehydrogenating a by-product oil fraction formed in the production of ethylbenzene using synthetic zeolite as an alkylating catalyst, and carbony
4982007 Process for selectively hydroformulating diolefin January 1, 1991
A process for selectively hydroformylating a diolefin, which comprises reacting a (1-arylethyl)vinylbenzene with carbon monoxide and hydrogen under the conditions of 40.degree. to 200.degree. C. in reaction temperature and 5 kg/cm.sup.2 or above in reaction pressure in the presence o
4967009 Method for oxidizing unsaturated aromatic compounds October 30, 1990
This invention relates to a method for manufacturing aromatic compounds having the following formula (II) comprising the step of reacting an unsaturated aromatic compound having the following formula (I) with an aryl compound containing an iodosyl group or the salt thereof within a t
4937375 (Phenylethenyl)phenylpropionic acid and its ester, and method for producing (benzoylphenyl)propi June 26, 1990
New compounds of .alpha.-(3-(1-phenylethenyl)phenyl)-propionic acid and its esters and a method for producing .alpha.-(3-benzoylphenyl)propionic acid which is prepared by oxidizing the former compound as an intermediate. The method is characterized in the easiness in operation, the low c
4922052 (Vinylphenyl)phenylmethane and method for producing (benzoylphenyl) propionic acid May 1, 1990
The invention relates to a new compound of (3-Vinylphenyl)phenylmethane and a method for producing .alpha.-(3-benzoylphenyl)propionic acid of ketoprofen without difficulty at low cost and in a high yield. The method comprises the steps of: reacting (3-vinylphenyl)phenylmethane with carbo
4914242 Process for preparing 3-ethylbenzophenone April 3, 1990
3-Ethylbenzophenone is prepared by oxidizing a by-product heavy oil fraction produced in the production of ethylbenzene using ZSM-5 type synthetic zeolite catalyst, without splitting carbon-to-carbon bonds. 3-Ethylbenzophenone is a starting material for synthesis of medicines, etc.
4908473 Process for selectively hydroesterifying diolefin March 13, 1990
A process for selectively hydroesterifying a diolefin, which comprises reacting a (1-arylethenyl)vinylbenzene with carbon monoxide and water or a lower alcohol at a reaction temperature of 40.degree. to 200.degree. C. and a carbon monoxide pressure 20 to 700 kg/cm.sup.2 in the presence o
4889952 (Phenylethenyl) phenylpropionaldehyde and method for producing (benzolyphenyl) propionic acid us December 26, 1989
A novel compound of .alpha.-(3-(1-phenylethenyl)phenyl)-propionaldehyde and a method for producing .alpha.-(3-benzoylphenyl)propionic acid which is prepared by oxidizing the former compound as an intermediate. The method is characterized in the easiness in operation, the low cost and the
4885419 1,2-Di(4-isobutylphenyl)hydrocarbon and its preparation and uses as intermediate December 5, 1989
Novel compounds of 1,2-di(isobutylphenyl)ethane and 1,2-di(isobutylphenyl)ethylene, method for producing the same and method for preparing 4-isobutylstyrene and .alpha.-(4-isobutylphenyl)propionic acid from any of these compounds. In the preparation of 4-isobutylstyrene from the form
4835337 Method for producing m-ethyldiphenyls May 30, 1989
A method for producing efficiently a highly pure 1-(m-ethylphenyl)-1-phenylethane or m-ethylphenylphenylmethane which are used as the starting materials for preparing medicines and other organic compounds. The method comprises the step of reacting a diaryl compound with benzene or al
4827065 Method of producing p-isobutylstyrene and a starting compound therefor May 2, 1989
A method for producing p-isobutylstyrene which is characterized in that starting materials are inexpensive, processes are easy to be done and products are highly pure. The method comprises the step of catalytically cracking 1,1-bis(p-isobutylphenyl)ethane at temperatures in the range of
4822934 1-(3-Vinylphenyl)-1-phenylhydrocarbons and method for producing the same April 18, 1989
1-(3-Vinylphenyl)-1-phenylhydrocarbons and method for producing the same. The invention further relates to 1-(3-vinylphenyl)-1-phenylethane which is used for preparing the former compound. The 1-(3-vinylphenyl)-1-phenylethylene is used as a new intermediate for preparing .alpha.-(3-b
4814494 Method for producing (aryl substituted) carboxylic acid or its salt March 21, 1989
An effective method for producing highly pure (aryl substituted)carboxylic acid or its salt which comprises the steps of:(I) oxidizing (aryl substituted)aldehyde in an acidic phase in the presence of hypohalogenite; and(II) bringing the oxidized product obtained in the preceding step into
4761508 1,1-(3-ethylphenyl)phenylethylene and method for preparing it August 2, 1988
The present invention is concerned with a novel intermediate 1,1-(3-ethylphenyl)phenylethylene represented by the formula (I) and its manufacturing method, and according to the present invention, Ketoprofen can be synthesized at a low cost and in a high yield.
4734528 Method for preparing 3-ethylbenzophenone March 29, 1988
The present invention provides a method for preparing 3-ethylbenzophenone in a high purity which comprises the steps of alkylating benzene with ethylene in the presence of an alkylating catalyst to obtain an alkylated product composed mainly of unreacted benzene, ethylbenzene, polyet
4731483 Method for preparing 3-ethylbenzophenone March 15, 1988
The present invention provides a method for preparing 3-ethylbenzophenone in a high purity which comprises the steps of alkylating benzene with ethylene with the aid of an alkylating catalyst to obtain an alkylated product composed mainly of unreacted benzene, ethylbenzene, polyethyl
4709089 Method for refining 2-(aryl substituted) propionic acid or its salt November 24, 1987
An effective method for refining 2-(aryl substituted)propionic acid or its salt which is characterized in that 2-(aryl substituted)propionic acid or its salt containing halogenated by-products is brought into contact with hydrogen in a liquid phase containing water under a basic conditio
4694100 Method for producing .alpha.-(p-isobutylphenyl)propionic acid or its alkyl esters September 15, 1987
A method for producing .alpha.-(p-isobutylphenyl)propionic acid or its alkyl esters which is characterized in that starting materials are inexpensive, processes are easy to be done and products are highly pure. The method comprises the steps of (I): catalytically cracking 1,1-bis(p-i
4659840 Method for preparing diaryl iodonium salts April 21, 1987
Provided is a method for preparing diaryl iodonium salts represented by the formula:wherein Ar.sub.1 and Ar.sub.2 respectively are an aryl group which may be substituted with an electron donor group and which may be the same or different which comprises subjecting a compound represented
4554360 Process for converting aromatic compounds November 19, 1985
Provided is a process for converting an aromatic compound to prepare an iodoarene, Ar--I, and an aryl compound which is a compound wherein an unsaturated compound is bonded directly to an aryl group, Ar, which process comprises reacting a diaryliodonium salt represented by general fo










 
 
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