| 摘要 |
PURPOSE:To easily obtain a sulfur-containing concentrated liquid capable of easily giving a sulfur-containing hot water, at a low cost, by charging sodium sulfate and sulfur to boiling water and boiling down the mixture. CONSTITUTION:A small amount of sodium sulfide (Na2S9H2O) is charged to boiling water and dissolved under agitation. The solution is added with sulfur and boiled down until the color of the water becomes yellow. The obtained concentrated liquid of sulfur is mixed with sodium bicarbonate and the glycerol liquid and is covered with a vegetable oil to prevent the contact of the liquid with air during storage. |
