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JPS56152434A |
PURPOSE: To obtain the titled high-purity compound directly usable as an intermediate raw material for a dyestuff, by the oxidation of an addition product of 1,4- naphthoquinone with a conjugated diolefin in an aqueous caustic alkali und...
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JPS5647892B2 |
1335510 Production of benzoquinones KOPPERS CO Inc 25 July 1972 [15 Nov 1971] 34795/72 Heading C2C The invention comprises a method for the production of a benzoquinone from an aminophenol or an aromatic diamine in which the aminophenol ...
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JPS5647168B1 |
Disclosed is a process for the production of 1,5- and 1,8-dihydroxyanthranquinone which enables ready separation of the 1,5- and 1,8-isomers, the process comprising saponifying a mixture of 1,5- and 1,8-dialkoxyanthraquinone using a stro...
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JPS56140946A |
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JPS56139478A |
Compounds of the formula wherein A, X, Z, R1, R2, R3, R4, n and m are defined hereinbelow are effective photoinitiators especially for the photopolymerization of ethylenically unsaturated compounds and for the curing of printing inks.
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JPS5642913B2 |
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JPS5642629B2 |
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JPS56121490A |
PURPOSE: To purify a coenzyme Q, by treating an extract of the coenzyme Q with a lower alcohol or a hydrous lower alcohol with a porous adsorbent consisting of a copolymer made from styrene and divinylbenzene essentially, and having a ne...
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JPS5638135B2 |
A process has been found for the preparation of anthraquinone by catalytic oxidation of naphthalene in the gas phase to provide a reaction product, obtained by quenching, cooling or quenching and cooling, containing naphthaquinone and ph...
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JPS5637973B2 |
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JPS5636180B1 |
1299566 Bis basic ethers of dihydroxyanthraquinones RICHARDSON-MERRELL Inc 13 May 1971 [14 May 1970] 14844/71 Heading C2C Novel compounds of formula wherein one symbol R2 is H and the other is of formula R3 and R4 are each H, C 1-3 alkyl...
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JPS5634030B2 |
A composition comprising a poly-alkyleneglycol is stablized against molecular degradation and viscosity loss at elevated temperatures by about 0.1 to about 10% by weight of an arylhydroquinone such as p-acetylphenylhydroquinone.
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JPS5675450A |
PURPOSE: To prepare the titled compound easily, in high yield, in a short time, by dissolving 3,4,5-trimethoxytoluene in water-lower alcohol mixture containing a strong acid, adding an aqueous solution of a persulfate to the solution, an...
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JPS5626647B2 |
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JPS5661321A |
1. Process for the manufacture of 1,4-naphthoquinone by oxidation of naphthalene by means of cerium (IV) salts in solution in an aqueous acid medium, characterised in that naphthalene, in pulverulent state, is put into suspension in the ...
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JPS5661371A |
PURPOSE: To obtain the titled substance which is an intermediate for a substituted benzoquinone, e.g. vitamin K, coenzyme Q, etc., by coupling a 2,3-substituted-5- methyl-1,4-hydroquinone derivative with a halide, and introducing a subst...
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JPS5622582B2 |
A catalyst for the oxidation of aromatic or unsaturated aliphatic hydrocarbons which contains in the active material from 60 to 99 percent by weight of titanium dioxide and/or zirconium dioxide, from 1 to 40 percent by weight of vanadium...
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JPS5621008B2 |
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JPS5632434A |
PURPOSE: After 3-nitrophthalic anhydride is subjected to chlorination, benzoylation and dehydrative ring closure with concentrated sulfuric acid, the reaction mixture is diluted with water until the concentration of sulfuric acid reaches...
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JPS5632433A |
PURPOSE: After 3-nitrophthalic anhydride is subjected to chlorination, benzoylation and decomposition with dilute hydrochloric acid, the reaction mixture is only stirred in benzene under reflux to facilitate the filtration of the slurry,...
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JPS5630941A |
PURPOSE: To purify a coenzyme Q useful as a remedy for heart failure etc., economically, in an industrial scale, by subjecting crude coenzyme Q to an adsorption process, an elution process and an adsorbent-cleaning process using silica g...
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JPS5612112B2 |
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JPS568014B2 |
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JPS56500167A |
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JPS563098B2 |
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JPS55501178A |
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JPS55164643A |
PURPOSE: To obtain a high purity coenzyme Q, which takes an important role in the biological electron transport system and has an excellent pharmaceutical activity for various diseases, at room temp., easily, in the yield, by recrystalli...
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JPS55159797A |
PURPOSE: To purify the title coenzyme Q efficiently, by adsorbing a crude coenzyme Q on a carbonaceous synthetic resin, and by eluting the coenzyme Q with a polar or nonpolar solvent or both. CONSTITUTION: A crude coenzyme Q prepared by ...
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JPS5549057B2 |
An improved process for the manufacture of alpha -methyl ethers of anthraquinone from the corresponding nitroanthraquinones by reacting the nitro compound with methanol in the presence of at least the stoichiometric amount of anhydrous o...
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JPS55157535A |
PURPOSE: To obtain 2,3-di(lower alkoxy)-5-methyl-1,4-benzoquinone in high yield, by adding an aqueous persulfuric acid salt to a suspension of 3,4,5-tri(lower alkoxy) toluene in a solvent, e.g. water, at a specific temp. CONSTITUTION: An...
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JPS55145633A |
Anthraquinone is prepared by the oxidation of diphenylmethane compounds in the gas phase in the presence of vanadium (V) oxide and a metal selected from ruthenium, rhenium, cerium, niobium and rhodium, and optionally a third metal select...
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JPS5544055B1 |
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JPS55122732A |
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JPS55115845A |
PURPOSE: To obtain the title compound, co-enzyme Q10, etc. useful as a drug for heart diseases, by oxidizing a condensate, prepared from a hydroquinone derivative and (iso)prenyl alcohol in the presence of a nitroalkane and a Lewis acid ...
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JPS5530497B2 |
In the production of 1,4-naphthoquinone along with phthalic anhydride by the catalytic gas phase oxidation of naphthalene, the improvement which comprises maintaining in the reaction space a sulphur concentration of about 0.002 to about ...
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JPS55102535A |
PURPOSE: To prepare highly pure 1,5- and 1,8-diphenoxyanthraquinones useful as intermediates for production of dyes, separately, in high yield, by separating the mixture of 1,5- and 1,8-diphenoxyanthraquinones into the individual constit...
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JPS5590947A |
Traces of free inhibitors for the development of silver halide which might be present as impurities of inhibitor releasing compounds or which might be prematurely released therefrom because of insufficient stability thereof during storag...
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JPS5587740A |
PURPOSE: To prepare a benzoquinone derivative useful as a medicine, e.g. a remedy for heart failure, vitamin K1, vitamin K2, etc., easily, in high yield without using a fatally poisonous substance, by reacting a paraquinone derivative wi...
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JPS5572136A |
PURPOSE: To obtain the title compound useful as a starting material for tocopherol, in high purity and yield, by separating the reaction mixture produced through the oxidation of 2,3,6-trimethylphenol with O2 in a specific solvent. CONST...
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JPS5516494B2 |
A process for producing a 2-tertiary-alkyl substituted anthraquinone, characterized by carrying out catalytic oxidation of a diphenylmethane type compound having the formula I wherein R1 and R2 are different from each other, and independ...
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JPS5555133A |
PURPOSE: To obtain the title compound excellent in purity and color tone, useful as a gelling agent for styrene, and a polymerization inhibitor, by alkylation of an easily available 2,3-dialkoxy-1,4-naphthoquinone with an aqueous solutio...
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JPS5555132A |
PURPOSE: To prepare the title compound having excellent purity and color tone, and useful as a gelling agent and polymerization inhibitor of styrene, etc., by the dealkylation of an easily synthesizable 2,3-dialkoxy-1,4-naphtoquinone wit...
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JPS5553236A |
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JPS5551092A |
Stable paramagnetic alkali radical cationic triple ions of selected 1,2 and 1,4 dicarbonyl compounds and their nitrogen-containing analogs have been produced by both conventional alkali metal reduction of an appropriate organic compound ...
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JPS5512414B2 |
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JPS5545622A |
PURPOSE: To obtain the title compound useful as an assistant for the preparation of hydrogen peroxide, etc., in high yield, by the ring closure of alkylbenzoylbenzoic acid, using a specific ring-closing agent and selecting the reaction t...
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JPS5512005B2 |
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JPS5540626A |
PURPOSE: To prepare the title compound, useful as an intermediate of medicines, and a photo-sensitive material, by reacting easily available p-benzoquinone or α- naphthoquinone with an alcohol in the presence of a cobalt-Schiff base com...
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JPS5527114A |
PURPOSE: To obtain coenzyme Q useful esp. as a remedy for cardiac insufficiency, etc., easily and economically, by absorbing a reduction-type coenzyme Q to an absorbent such as silica gel, and the oxidizing the coenzyme Q. CONSTITUTION: ...
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JPS5527197A |
o-Chloranil, a valuable organic oxidant used particularly in the photographic industry, is prepared by an improved, continuous flow process, using a slurry of tetrachlorocatechol and nitric acid in a flow reactor.
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