| 单词 | lead chamber process |
| 释义 | > as lemmaslead chamber process lead chamber n. a large reaction vessel made of welded sheet lead which is used in the manufacture of sulphuric acid from sulphur dioxide, air, and steam using oxides of nitrogen as catalysts; so lead chamber process. ΘΚΠ society > occupation and work > equipment > receptacle or container > vessel > vessels for other specific purposes > [noun] > for making sulphuric acid lead chamber1867 Gay-Lussac tower1873 the world > matter > chemistry > chemical substances > acids > [noun] > acids-named > containing sulphur > sulphuric acid > manufacturing process lead chamber process1867 1867 Chem. News 5 July 12/1 (heading) Lead-chamber process. 1867 Chem. News 5 July 12/1 This explains the loss of nitric acid in the manufacture of sulphuric acid, which always takes place when the sulphuric acid in the lead-chamber is below the normal strength. 1879 G. Lunge Sulphuric Acid I. 261 That apparatus..in which now-a-days all sulphuric acid, except the Nordhausen oil of vitriol, is made, viz. the lead chamber. 1909 L. Kahlenberg Outl. Chem. xiii. 198 There are commonly three lead chambers, so connected that the gases enter the top of each and pass out at the bottom. 1946 J. R. Partington Gen. & Inorg. Chem. xxiv. 710 The lead chamber plant..consists of (i) pyrites (or sulphur) burners, (ii) a dust separator.., (iii) a nitre oven.., (iv) a Glover tower, (v) a series of lead chambers with arrangements for supplying steam or water spray, and (vi) a Gay-Lussac tower. 1969 H. T. Evans tr. G. Hägg Gen. & Inorg. Chem. xxi. 529 The reaction takes place in reaction chambers, formerly lead chambers, that is, large lead-lined rooms, but now most often of other types. 1973 R. W. Thomas & P. J. Farago Industr. Chem. viii. 133 The lead-chamber process is by no means obsolete.., and is likely to remain in operation for the production of acid not exceeding 78 per cent in concentration..and where high purity is not essential. < as lemmas |
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