| 单词 | sulphonic acid |
| 例句 | Some of those named here dye the animal fibres, even without mordants; some are Direct Colours possessing mordant-dyeing 750 properties, others are sulphonic acid derivatives of Alizarin Colours, suitable for wool but not for cotton. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 8 "Dubner" to "Dyeing" 2010-12-26T03:00:17.840Z The pure substances are best obtained by fusion of the corresponding toluene sulphonic acids with potash. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 6 "Coucy-le-Château" to "Crocodile" An important nucleus-synthetic reaction is the saponification of nitriles, which may be obtained by the interaction of potassium cyanide with a halogen substitution derivative or a sulphonic acid. The Project Gutenberg Encyclopedia Volume 1 of 28 This effect is still more pronounced when the absolute amount of free sulphonic acid is diminished. Synthetic Tannins The aromatic compounds form, as a rule, sulphonic acids with much greater facility. Synthetic Tannins Alizarin S is a sulphonic acid derivative of alizarin, and since it is much more soluble, it readily yields level colours. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 8 "Dubner" to "Dyeing" 2010-12-26T03:00:17.840Z It may be prepared by fusion of ortho-toluene sulphonic acid with potash; by the action of phosphorus pentoxide on carvacrol; or by the action of zinc chloride on camphor. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 6 "Coucy-le-Château" to "Crocodile" Hence, if crude Neradol is treated with increasing amounts of caustic soda, a series of products containing increasing quantities of salt and decreasing concentrations of sulphonic acid is obtained. Synthetic Tannins The latter owe their presence to the neutralisation of the crude Neradol with caustic soda, and are composed of sodium salts of the sulphonic acid in addition to Glauber salts. Synthetic Tannins The aromatic dihydric alcohols are easily condensed with the different sulphonic acids and yield valuable tanning matters. Synthetic Tannins All natural tannins are unaffected by this treatment, ligninsulphonic and other sulphonic acids cause opalescence. Synthetic Tannins |
| 随便看 |
|
英语例句辞典收录了117811条英语例句在线翻译词条，基本涵盖了全部常用单词及词组的例句翻译及用法，是英语学习的有利工具。