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JPS505341A |
Trimethylbenzoquinone is made by oxidizing isophorone with a thallic compound in the presence of water and preferably an acid.
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JPS49134662A |
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JPS49128937A |
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JPS4943940B1 |
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JPS4943952B1 |
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JPS4943941B1 |
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JPS4941423B1 |
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JPS4941422B1 |
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JPS4941040B1 |
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JPS49116045A |
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JPS4940219B1 |
Quinones of the formula:
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JPS4939676B1 |
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JPS49108035A |
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JPS49108034A |
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JPS4934978B1 |
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JPS4934974B1 |
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JPS4930911B1 |
1,223,446. Silver and mercury carbonate compositions. SCHERICO Ltd. 14 Aug., 1968 [21 Aug., 1967], No. 38917/68. Heading C1A. [Also in Division C2] An oxidizing composition comprises silver and/or mercury carbonate dispersed on an inert ...
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JPS4985058A |
Separation of anthraquinone from a mixture of its vapor with a carrier gas by treating the hot gas-vapor mixture with an aqueous suspension of anthraquinone. The anthraquinone produced according to the process of the invention is a valua...
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JPS4980031A |
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JPS4928503B1 |
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JPS4924464B1 |
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JPS4924465B1 |
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JPS4954337A |
Process for the manufacture of tetraaryloxybenzoquinones of the formula WHEREIN R denotes an aromatic radical, characterised in that a tetrahalogeno-1,4-benzoquinone is reacted with an alkali metal salt of an aromatic hydroxy compound in...
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JPS4936641A |
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JPS4914075B1 |
In a process for the hydrogenation of an anthraquinone to the corresponding anthrahydroquinone in the production of hydrogen perioxide comprising hydrogenating said anthraquinone, oxidizing the resulting anthrahydroquinone and extracting...
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JPS4930332A |
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JPS4910665B1 |
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JPS4924931A |
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JPS495334B1 |
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JPS495120B1 |
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JPS494052B1 |
A new process for the manufacture of pyranthrones (I) from 2,2' -dialkyl-1,1'-dianthraquinonyls (II) by heating (II) at from 150 DEG to 210 DEG C. in polar organic solvents in the presence of alkali metal acetates.
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JPS497259A |
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JPS497260A |
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JPS495429A |
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JPS4899130A |
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JPS4840341B1 |
1,268,653. Trimethylbenzoquinone. BADISCHE ANILIN- & SODA-FABRIK A.G. 12 Aug., 1969 [13 Aug., 1968], No. 40176/69. Heading C2C. Trimethyl-p-benzoquinone is prepared by reacting 2,3,6-trimethylphenol with oxygen in the presence of a cobal...
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JPS4837259B1 |
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JPS4876854A |
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JPS4875558A |
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JPS4872160A |
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JPS4861463A |
Production of anthraquinone by catalytic oxidation of indans with oxygen in the presence of a vanadium (V) compound with one or more than one compound of thallium and antimony. Anthraquinone which can be prepared by the process according...
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JPS4851017A |
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JPS4823068B1 |
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JPS4848434A |
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JPS4818220B1 |
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JPS4836133A |
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JPS4834155A |
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JPS4813358B1 |
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JPS4831233A |
1373213 Preparation of 1,4-dichloroanthraquinone IMPERIAL CHEMICAL INDUSTRIES Ltd 4 Aug 1972 [26 Aug 1971] 40086/71 Heading C2C The invention comprises a process for the preparation of 1,4-dichloroanthraquinone in which a compound of For...
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JPS4810779B1 |
1,232,524. Benzoquinones. CIBA GEIGY A.G. 18 July, 1969 [29 July, 1968], No. 36293/69. Heading C2C. Compounds of the formula where R is an alkyl, alkenyl or cycloalkyl radical, X 1 is H or a substituent and X 2 is halogen or another elec...
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