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Naphthalene sulphonation

Neville-Wintber acid The trivial name given to 4-hydroxy-1-naphthalene sulphonic acid. [Pg.272]

Schaffer s acid, CioHg04S. 2-hydroxy-7-naphthalene sulphonic acid. Obtained by sulphonating 2-naphthol with a small amount of sulphuric acid at a higher temperature than is used for the preparation of crocein acid. A valuable dyestuff intermediate. [Pg.353]

Supplement (combined with Volume XII) XI, 2nd 1933 1605-1739 2. Sulphonic acids Benzenesulphonic acid, 26. p-Toluenesulphonic acid, 97. Naphthalene - sulphonic acid, 155. Hydroxy-Sulphonic acids Phenol-sulphonic acid, 234. Naphthol-sulphonic... [Pg.1121]

Wetting agents. These facilitate the wetting of surfaces and aid colloidal stability without foaming. Naphthalene sulphonate/formaldehyde is the most common wetting agent. [Pg.655]

R. El Hairak, M. Calull, R. M. Marce and R Boirull, Determination of naphthalene-sulphonates in water by on-line ion-pair solid-phase exti action and ion-pair liquid cliro-matography with diode-airay UV detection , Int. J. Environ Anal. Chem. 69 295-305 (1998). [Pg.375]

Stability of surfactants in a water matrix, even using different preservation agents, is poor and serious, quantitative and qualitative changes in sample integrity occur if the storage exceeds 7 days. The most suitable preservation additive is formaldehyde (minimum 3%) for non-ionic surfactants and LAS, and acidification to pH < 3 for benzene and naphthalene sulphonates. However, storage for longer than 7 days is not recommended. [Pg.534]

Naphthol Yellow S (citronin A, flavianic acid sodium salt, 8-hydroxy-5,7-dinitro-2-naphthalene sulphonic acid disodium salt) [846-70-8] M 358.2, dec on heating. Greenish yellow powder soluble in H2O. The free sulphonic acid can be recrystd from dil HCl (m 150°) or AcOH-EtOAc (m 148-149.5°). The disodium salt is then obtained by dissolving the acid in two equivalentss of aqueous NaOH and evaporating to dryness and drying the residue in a vacuum desiccator. The sodium salt can be recrystd from the minimum volume of H2O or from EtOH [Dermer and Dermer JACS 61 3302 1939]. [Pg.281]

The chief advantage in the use of this acid is its selective property, whereby certain sulphonic acids are formed, which could not be formed by direct sulphonation with sulphuric acid or oleum, or which might be formed only in presence of other isomers, the separation of which might be difficult. For example, naphthalene sulphonated with oleum at the ordinary temperature gives a mixture of 1 5- and 1 6-disulphonic acids, while chlorosulphonic acid yields only the 1 5-acid. Similarly, with toluene, chiefly the ortho acid is formed. With excess of chlorosulphonic acid a sulphonyl chloride is formed, except in the case of phenols or naphthols, which give the free sulphonic acid. [Pg.317]

Naphthalene sulphonyl chloride is prepared in a similar manner from sodium j8-naphthalene sulphonate. (A., 275, 233.)... [Pg.425]

Rusconi, S., et al. 1996. Naphthalene sulphonate polymers with CD-4 blocking an anti-immunodeficiency virus type 1 activities. Antimicrob Agents Chemother 40 234. [Pg.466]

Anilino-8-naphthalene sulphonic acid Nonfluorescent, but gives fluorescent product... [Pg.274]

Water dispersible Naphthalene sulphonic acid - Dispersing agents... [Pg.8]

Wettable powders Sodium di-alkyl naphthalene Sulphonates Fatty alcohol ethoxylates Wetting agents... [Pg.8]

Naphthalene sulphonic acid -formaldehyde condensates Dispersants... [Pg.8]

Tamol Series Naphthalene sulphonic acid condensates... [Pg.301]

Lantz [23 a] has studied the nitration of naphthalene sulphonic acids (mono-, di- and tri-sulphonic acids). He stated that no displacement of the sulphonic groups with nitro groups occurs. By using nitrating concentrated mixtures he was able to introduce nitro groups so that the number of both S03H and N02 groups reached a maximum of four. [Pg.426]

Naphthalene sulphonate compound, used as dispersing agent, especially for vat and disperse dyes. [Pg.597]

Polymethyl naphthalene sulphonate sodium salt dispersant with very low free sulphate content. [Pg.616]

Naphthalene sulphonate Naphthalene sulfonate, sodium STOKORON Stockhausen... [Pg.662]

Polyglycol mono oleate Polyhydrocarboxylic acid salt Polymeric alcohol blend Polymeric blend Polymethyl naphthalene sulphonate sodium salt Polyolefin... [Pg.666]

See other pages where Naphthalene sulphonation is mentioned: [Pg.269]    [Pg.378]    [Pg.2576]    [Pg.2581]    [Pg.548]    [Pg.54]    [Pg.350]    [Pg.499]    [Pg.547]    [Pg.444]    [Pg.484]    [Pg.486]    [Pg.90]    [Pg.664]    [Pg.211]    [Pg.311]    [Pg.424]    [Pg.23]    [Pg.99]    [Pg.290]    [Pg.346]    [Pg.87]    [Pg.782]   
See also in sourсe #XX -- [ Pg.164 ]

See also in sourсe #XX -- [ Pg.164 ]

See also in sourсe #XX -- [ Pg.164 ]

See also in sourсe #XX -- [ Pg.164 ]



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Alkyl naphthalene sulphonates

Naphthalene formaldehyde sulphonate

Naphthalene-/5-sulphonic acid

Naphthalene: acylation sulphonation

Sodium naphthalene-2-sulphonate

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