Artificial Dye-stuffs: Their Nature, Manufacture, and Uses

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G. Routledge & sons, Limited, 1917 - Dyes and dyeing - 212 pages
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Page 24 - Acrylic acid and its esters may be viewed as derivatives of ethylene in which one of the hydrogen atoms has been replaced by a carboxyl or carboalkoxyl group.
Page 164 - The air is not a simple element, as the ancients supposed, but is formed by the mingling of two gases, known to the chemist as oxygen and nitrogen, in the proportion of one part of the former to four parts of the latter. These gases are very unlike...
Page 82 - These bodies are obtained by fusing with caustic alkalis the disulphonic acids which are obtained by sulphonation of anthraquinone. Commercial alizarin often contains one or both of these bodies, since the anthraquinone sulphonic acid used for the manufacture of alizarin often contains a certain amount of the disulphonic acids. Both these trioxyanthraquinones dye alumina-mordanted cotton red shades. A third trioxyanthraquinone, Purpurin...
Page 71 - Superheated steam from the pipe B, which is perforated by many holes, carries away the vapours into the large chamber D, where they are suddenly chilled by a spray of cold water from the rose H, causing the anthracene to precipitate in the finest state of division — a necessary condition for its easy conversion into anthraquinone by the action of oxidising agents. 5. Pitch. — The residue which remains in the tar still is Pitch and forms 50-55 per cent, of the tar. Much of it probably...
Page 87 - In recent years, a large number of experiments have been carried out on the isomorphism of various titanium bearing compounds, which have technological applications.
Page 158 - Immedial Bronze. A dyestuff prepared by fusing dinitro-cresol with polysulphides. Immedial Brown B. A brown sulphide dyestuff, giving yellowish-brown shades on cotton. It is manufactured by boiling 4-hydroxy-4-amino-diphenylamine with a solution of sodium hydroxide, and heating the product with sodium polysulphides. Immedial Cutch (Immedial Direct Blue). A dyestuff belonging to the same class as Immedial indone R. Immedial Green.
Page 82 - Bohn in 1890, that by the action of fuming sulphuric acid on anthraquinone, and anthraquinoline derivatives, new hydroxyl groups could be introduced, the reaction being better in the presence of boric acid.
Page 87 - This action results in the production of a soluble potassium salt of a blue hydro-derivative which, when dissolved in water with free access of air, is converted into the insoluble blue colouring matter with which fabrics are dyed as above described.
Page 14 - ... of little or no value from the point of view of the manufacturer of coal-tar dye-stuffs.
Page 102 - After a short time nitrogen is evolved in large quantities, and the temperature rises to 15—25 C., due to the formation of dithiosalicylic acid.

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