70 0 0多年以前 ,天然的碳酸钠首先是从幼发拉底河边生长的芦苇的灰烬中提取的。大约 5 5 0 0年以前埃及人也开始用一种从湖水蒸发中提取的天然纯碱生产装饰玻璃和作为铝酸硅砂浆和肥皂的一种成份。当人们从海藻类植物的灰烬中提取丰富的钠碱时 ,也从木材灰中得到了丰富的钾碱 More than 70 years ago, natural sodium carbonate was first extracted from the ash of reeds growing along the Euphrates River. About 550 years ago, Egyptians also began producing decorative glass and as a component of aluminous-silicate mortar and soap with a natural soda extracted from the evaporation of lake water. When people extract abundant sodium alkali from the ash of seaweed plants, they also get rich potassium alkali from wood ash.