Naphthalenedisulphonic Acid Formation with 20 Oleum

Many authors have described naphthalene disulphonic acid formation by sulphonation of naphthalene with sulphuric acid:  the proportions of the different isomers in this reaction are discussed under several sets of experimental conditions. On the contrary, little data is available concerning the use...

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Bibliographic Details
Published in:Organic process research & development 1997-11, Vol.1 (6), p.411-414
Main Authors: Aleboyeh, H, Walter, S, Aleboyeh, A, Ladhari, N
Format: Article
Language:English
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Summary:Many authors have described naphthalene disulphonic acid formation by sulphonation of naphthalene with sulphuric acid:  the proportions of the different isomers in this reaction are discussed under several sets of experimental conditions. On the contrary, little data is available concerning the use of oleum as a sulphonation medium. The use of oleum as a sulphonating medium is interesting from an industrial point of view for monosulphonic acid preparation, since it results in fast reaction rates and yields a minimum of water. However, since polysulphonic acid formation is enhanced in this way, it is important to know how much of these unwanted products are formed. The proportion of the different isomers of the obtained naphthalenedisulphonic acids is strongly dependent on reaction conditions. This work deals with the influence of reaction time and temperature on the reaction yields. HPLC is used for diacid separation and determination.
ISSN:1083-6160
1520-586X
DOI:10.1021/op9700237