| 单词 | potash alum |
| 释义 | > as lemmaspotash alum potash alum n. a hydrated double sulphate of potassium and aluminium. ΘΚΠ the world > matter > chemistry > chemical substances > salts > [noun] > salts named by atomic number > sulphates or sulphites > other sulphates aluma1398 aphronitrea1398 white vitriol1676 oxysulphate1802 hyposulphate1819 sulphur salt1836 potash alum1837 hepar1866 kainite1868 kalinite1868 nickel sulphate1868 trisulphate1880 trisulphonate1892 thalline sulphate1899 1837 Philos. Trans. (Royal Soc.) 127 127 The quantity of water in potash alum may be reduced by efflorescence to six atoms in a stove of the temperature of 150° Fahr. 1910 Encycl. Brit. I. Potash alum is the common alum of commerce, although both soda alum and ammonium alum are manufactured. 1961 H. Blackshaw & R. Brightman Dict. Dyeing & Textile Printing 9 Potash Alum—K2SO4Al2(SO4)3.24H2O..used in the preparation of aluminium mordants. 2004 Ceramic Industry (Nexis) 1 Jan. 18 Typical accelerators for Portland cement include alkali carbonates, potash alum, powdered gypsum and calcium aluminate cement. < as lemmas |
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