单词 | permutit |
释义 | Permutitn. A proprietary name for: ion-exchange material used for softening water; equipment and processes that employ such material. ΘΚΠ the world > matter > chemistry > equipment or apparatus > [noun] > miscellaneous apparatus bain1477 speculum1650 filtering paper1651 wheel-fire1662 filter paper1670 sun furnace1763 respirator1789 candle-ball1794 rectifier1822 candle-bomb1823 filter1823 oxyhydrogen blowpipe1823 shade1837 graduator1839 pipette1839 thistle funnel1849 pressure tube1852 ozonizer1858 dialyser1861 Liebig condenser1861 Sprengel pump1866 Sprengel tube1866 water softener1867 mercury pump1869 Bunsen burner1870 dialysator1877 test-mixer1877 tube-condenser1877 Kipp1879 reflux condenser1880 policeman1888 converter1889 pressure boiler1891 spot plate1896 hydrogen electrode1898 sampler1902 reactor1903 fume-chamber1905 Permutit1910 microburner1911 salt bridge1915 precipitator1919 Raschig ring1920 microneedle1921 titrator1928 laboratory coatc1936 spray tower1937 precipitron1938 ion exchanger1941 potentiostat1942 chemostat1950 Knudsen pipette1951 pH-stat1956 cryopump1958 1910 Trade Marks Jrnl. 12 Jan. 44 Permutit... Chemical substances..being artificially prepared compounds for the purification of water, molasses and saccharine juices. 1937 Life 12 Apr. 18/4 (advt.) Permutit equipment is connected into your supply pipe. 1948 L. E. H. Whitby Nurses' Handbk. Hygiene (ed. 8) ii. 50 In modern houses hard water is often rendered soft by means of a ‘Permutit’ filter. 1974 D. M. Adams Inorg. Solids vii. 255 This process [sc. cation exchange] forms the basis of the Permutit water-softening process in which Ca2+ is removed from ‘hard’ water by exchange for sodium. This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022). < n.1910 |
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