单词 | naphthol |
例句 | This compound is rendered insoluble when precipitated directly on barytes, by acting on it with an alkaline solution of beta naphthol. Paint Technology and Tests 2011-09-15T02:00:12.263Z The phenols of naphthalene are called naphthols—they bear the same relationship to naphthalene that carbolic acid bears to benzene. Coal and What We Get from It Coal Tar.—These soaps contain, in addition to carbolic acid and its homologues, naphthalene and other hydrocarbons derived from coal, naphthol, bases, etc. The Handbook of Soap Manufacture Resorcine, like naphthol, is insoluble in water, but it can be dissolved by using either soda ash or caustic soda. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student As the name of the hydrocarbon is naphthalene, however, we call these compounds naphthols, and one is distinguished as alpha- the other as beta-naphthol, both of them having the formula C10H7OH. The Chemistry of Hat Manufacturing Lectures Delivered Before the Hat Manufacturers' Association So instead of phenol, other coal tar products such as cresol, naphthol or benzene itself may be used. Creative Chemistry Descriptive of Recent Achievements in the Chemical Industries Owing to the structure of the naphthalene molecule there are two isomeric naphthols, whereas there is only one phenol. Coal and What We Get from It Among these are thymol, naphthol, oil of eucalyptus, carbolates, and salicylates. Scientific American Supplement, No. 561, October 2, 1886 Now the diazo compounds are rather unstable bodies, but they have a great affinity for other compounds, such as naphthol, phenylene diamine, phenol, and combine easily with them when brought into contact with them. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student There are two varieties of naphthol, called alpha- and beta-naphthol, but only one phenol, namely, carbolic acid. The Chemistry of Hat Manufacturing Lectures Delivered Before the Hat Manufacturers' Association Of the "acid blacks and violets," a few colors are of medium fastness, both on wool and silk, e.g., naphthol black, naphthylamine, black, resorcinol brown, fast brown, etc. Scientific American Supplement, No. 810, July 11, 1891 Setting out from the naphthols and naphthylamines we shall be led into industrial developments of the greatest importance. Coal and What We Get from It Ethers of salicylic acid and its homologues, prepared from these acids and phenol, naphthols, &c., are in use as antiseptics under the general designation of “salols.” Coal and What We Get from It Some of the effects which can be obtained from the two naphthols and various bases are given in the following table:— Base. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student The design can thus be developed by dipping the fabric into a solution of naphthol, naphthylamine, &c. Coal and What We Get from It Further, an excellent group of coloring matters, giving fast browns and greens with copper and iron mordants respectively, is formed by naphthol green, resorcinol green, gambin, and dioxin. Scientific American Supplement, No. 810, July 11, 1891 When a good method for making the naphthol was discovered in 1869, the dye was made from this. Coal and What We Get from It It is, chemically speaking, dinitro-alpha-naphthol; but it was not at first made from naphthol, as the latter was not at the time a technical product. Coal and What We Get from It They are also called naphthol colours from the use of beta-and alpha-naphthol in their production. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student Their introduction has been the means of finding new uses for the naphthylamines and naphthols and their sulpho-acids, and has thus contributed largely to the utilization of naphthalene. Coal and What We Get from It Various additions have been made from time to time to the naphthol bath. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student A salt of this last acid, containing sodium and iron as metallic bases, was introduced in 1884, under the name of “naphthol green.” Coal and What We Get from It The process of dyeing cotton with a naphthol colour takes place in two stages, the first being the grounding or preparing with the naphthol, the second the developing with the diazotised base. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student When this compound is combined with naphthol diazo-azo dyes are produced. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student Alpha-Naphthylamine Claret.—This is a very fine and fairly fast red, and next to the paranitroaniline red may be considered the most important of the naphthol colours. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student |
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