There were two things to be done then-- first, to replace the absorbed oxygen; secondly, to destroy the expired carbonic acid; both easy enough to do, by means of chlorate of potassium and caustic potash. The former is a salt which appears under the form of white crystals; when raised to a temperature of 400 degrees it is transformed into chlorure of potassium, and the oxygen which it contains is entirely liberated.
Caustic potash has a great affinity for carbonic acid; and it is sufficient to shake it in order for it to seize upon the acid and form bicarbonate of potassium.
A sufficient quantity of chlorate of potassium and of caustic potash was placed at his disposal, together with provisions for eight days.
Would he obtain air by chemical means, in getting by heat the oxygen contained in chlorate of potash, and in absorbing carbonic acid by caustic potash
? Or--a more convenient, economical, and consequently more probable alternative-- would he be satisfied to rise and take breath at the surface of the water, like a whale, and so renew for twenty-four hours the atmospheric provision?
But Captain Nicholl hastened to remedy this state of things, by placing on the floor several receivers containing caustic potash
, which he shook about for a time, and this substance, greedy of carbonic acid, soon completely absorbed it, thus purifying the air.
M2 PRESSWIRE-August 29, 2019-: Caustic Potash
(Potassium Hydroxide) Market Report, Industry Overview, Price Trends and Forecast 2019-2024
IN MERSEY | In the Mersey today, Vos Inspirer, a supply/ support vessel; Amonith, a chemical tanker carrying Caustic Potash
Liquor from Belgium; Pollux, a container vessel coming from Spain; Atlantic Sea, a container vessel coming from the US and sailing on to Belgium.