| 单词 | beta-naphthol |
| 例句 | By this means alpha-naphthol gives what is known as “acid brown,” or “fast brown,” and beta-naphthol a fine crimson, known as “fast red,” or “roccellin.” Coal and What We Get from It After diazotising rinse the goods in a bath weakly acidulated with hydrochloric or sulphuric acid, and then immediately develop with beta-naphthol. 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 During the operation the sterilized instruments should be kept in a beta-naphthol solution and returned to it when the operator is not using them. Scientific American Supplement, No. 810, July 11, 1891 Titan ingrain blue and 20 lb. salt, then diazotise and develop with beta-naphthol. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student Their discovery not only increased the consumption of beta-naphthol, but also that of the bases which were used for diazotising. Coal and What We Get from It Alpha-naphthol has similar properties to, and is used in the same way as, beta-naphthol; it develops much darker and rather duller colours, which are less fast to washing. 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 Diamine fast yellow A and 20 lb. salt, then diazotise and develop with beta-naphthol. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student Practically the only phenol that is used is the beta-naphthol; alpha-naphthol is occasionally used, but not often. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student The bases of the third column when diazotised and combined with the disulpho-acids of beta-naphthol give a graduated series of dyes beginning with orange and ending with bluish scarlet. Coal and What We Get from It It is not desirable to use any more caustic soda than is necessary to dissolve the beta-naphthol, so that the bath is not too alkaline. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student Various preparations of beta-naphthol have been brought out by colour makers. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student The purer the beta-naphthol the better, especially for producing the paranitroaniline red. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student The beta-naphthol bath does not keep well and in time tends to grow brown, and when this occurs stains are invariably produced on the cotton. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student The cotton is treated in this way as with the ordinary beta-naphthol preparation. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student Schaeffer's acid is a sulpho acid of beta-naphthol, and is dissolved by taking 10 lb. of the acid and 7½ lb. soda, boiling with 50 gallons of water. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student Toluidine Orange.—For this colour the cotton is prepared with the beta-naphthol in the ordinary way. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student |
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