On the development of the chemical arts during the last ten years

✍ Scribed by A.W. Hofmann

• Publisher: Elsevier Science
• Year: 1876
• Tongue: English
• Weight: 270 KB
• Volume: 102
• Category: Article
• ISSN: 0016-0032
• DOI: 10.1016/0016-0032(76)90331-8

✦ Synopsis

Weldon's process, lastly, is worked more rapidly than the old method, and requires a smaller number of sandstone troughs, though the latter advantage is out-balanced by the cost of the oxidation apparatus. The productive power of a sand-stone apparatus was, on the old process, 1270 kilos, of chloride of lime weekly; whilst on Weldon's method in Alhusen's works, at Newcastle, the weekly production is 4572 kilos. In the same establishment four hours are required for the oxidation of 2500 kilos, of peroxide of manganese, being at the rate of 115 kilos, oxygen per hour.

The cost of the process in England compared with the old method may be seen from the following statements of Weldon's :-Per 1000 kilos, chloride of lime--Weldon's Process.--Labor, 10s. to 17s.; coal, 750 kilos.; lime, 1400 kilos.; lime-stone for saturating the excess of acid, 250 kilos.