| 释义 |
olation Chem. and Tanning.|ɒˈleɪʃən|
[f. ol + -ation.
Though often attributed to Bjerrum and to Stiasny the word has not been found in their publications.]
Conversion of a complex into an ol form; linking of metal atoms by hydroxyl ligands. Used esp. with reference to chromium compounds used in tanning.
1931Jrnl. Physical Chem. XXXV. 27 Bjerrum..postulated that perhaps the hydroxo groups in the complex ions were becoming more firmly bound to form larger complexes... Bjerrum called this process ‘olation’. 1931Chem. Abstr. XXV. 2325 The basicity of the Cr salt in a one-bath Cr liquor is greater than that of the liquor as a whole because of ‘olation’; the complex ol compds. react with the free acid only very slowly. 1941D. Woodroffe Fund. Leather Sci. viii. 107 This condensation is termed ‘olation’ and the larger complex compound obtained is described as an olated chromium salt. 1948Progress in Leather Sci. 1920–45 II. xxvi. 524 Stiasny..termed this process ‘olation’ and postulated that hydroxy groups react immediately with acid whereas ‘ol-groups’ only react after deolation. 1969T. C. Thorstensen Pract. Leather Technol. viii. 120 At higher temperatures there is greater fixation of the chrome tanning compound by the hide protein and greater olation of the chrome complexes. 1974D. Nicholls Inorganic Complexes iii. 26 The hydroxo-aquo complexes may combine together in a process known as olation.
Hence (as back-formations) oˈlate v. intr., to form an ol group or compound; oˈlated ppl. a.
1931Jrnl. Physical Chem. XXXV. 45 The hydroxo groups then ‘olated’, resulting in the formation of large aggregates, eventually reaching colloidal size. Ibid., It would be expected..that the greater the degree of olation, the more sluggish would be the reaction of the complex olated ion. 1936E. W. Merry Chrome Tanning Process i. 9 Chrome alum solutions prepared hot are green and contain strongly olated chromium compounds. Ibid., It is not possible to forecast what will be the actual basicity of the chrome salts..or the extent to which they will olate. 1941[see above]. 1945McLaughlin & Theis Chem. Leather Manuf. xiv. 416 A chrome compound is said to be ‘olated’ when one or more of its hydroxyl groups is held between two chromium atoms. |