| 单词 | lime-soda |
| 释义 | > as lemmaslime-soda lime-soda n. attributive applied to a process for softening water by treatment with lime and sodium carbonate. ΘΚΠ the world > physical sensation > cleanness and dirtiness > freedom from impurities > removal of impurities > desalination or softening of water > [adjective] > process or apparatus lime-soda1930 multiflash1964 1930 Engineering 15 Aug. 219/1 It [sc. the base exchange method] gives rise to no precipitate whatever, and this avoids what in the lime-soda process is often a cause of difficulty. 1950 B. E. Hartsuch Introd. Textile Chem. iv. 92 The lime-soda method for softening water is the oldest and is still most used for very large softening plants. 1970 Kirk-Othmer Encycl. Chem. Technol. (ed. 2) XXII. 98 The lime or lime-soda process is based upon precipitation of calcium as calcium carbonate and magnesium as magnesium hydroxide. < as lemmas |
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