The Chemistry of the Coal Tar Dyes
The Chemistry of the Coal Tar Dyes
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In our eReader you can find the full English version of the book. Read The Chemistry of the Coal Tar Dyes Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book The Chemistry of the Coal Tar Dyes
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The prime requisite is the presence of two amino groups which offer themselves to a double diazotization, and many substances possessing among their various side groups the two amino groups are readily available for initial substances of the more complex tetrazo dyes.
Diamino stilbene disulphonic acid is an example of such a class of substances. The composition is shown below: HO. S SO ; H Diamino stilbene disulpho acid It resembles in its configuration benzidine; indeed if a molecule of benzid...ine is imagined to be cut in half and the two carbon and hydrogen atoms thrust between the benzene rings, a molecule of stilbene would be formed.
In preparing this substance p-nitrotoluene is treated with fuming sulphuric acid and a sulpho group is introduced, forming p-nitrotoluene sulpho acid. This product on boiling with caustic potash yields azoxystilbene disulpho acid, v^inc dust is then added to the alkaline solution setting free nas- cent hydrogen, which reduces it and decolorizes it, forming diamono stilbene disulpho acid.
What to read after The Chemistry of the Coal Tar Dyes?
You can find similar books in the "Read Also" column, or choose other free books by Irving W Irving Wetherbee Fay to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
The prime requisite is the presence of two amino groups which offer themselves to a double diazotization, and many substances possessing among their various side groups the two amino groups are readily available for initial substances of the more complex tetrazo dyes.
Diamino stilbene disulphonic acid is an example of such a class of substances. The composition is shown below: HO. S SO ; H Diamino stilbene disulpho acid It resembles in its configuration benzidine; indeed if a molecule of benzid...ine is imagined to be cut in half and the two carbon and hydrogen atoms thrust between the benzene rings, a molecule of stilbene would be formed.
In preparing this substance p-nitrotoluene is treated with fuming sulphuric acid and a sulpho group is introduced, forming p-nitrotoluene sulpho acid. This product on boiling with caustic potash yields azoxystilbene disulpho acid, v^inc dust is then added to the alkaline solution setting free nas- cent hydrogen, which reduces it and decolorizes it, forming diamono stilbene disulpho acid.
What to read after The Chemistry of the Coal Tar Dyes?
You can find similar books in the "Read Also" column, or choose other free books by Irving W Irving Wetherbee Fay to read onlineMoreLess
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