古代化学,主要是在人们解决生产和生活中的实际问题时,得以发展的。这一点,在具有悠久历史和独特工艺的四川井盐生产中,表现得尤其明显。在长期的生产实践中,井盐生产者应用许多化学原理和卓有成效的科学方法,出色地克服了生产中一个个困难,在我国古代化学史上写下了光辉的篇章。(一)对天然盐卤溶液的认识四川盆地地下蕴藏着丰富的盐卤资源。这些盐卤矿藏,按照成矿年代和形态上的差异,分为“黄 Ancient chemistry developed mainly when people were solving practical problems in production and life. This is particularly evident in the well salt production in Sichuan, which has a long history and unique technology. In long-term production practice, well salt producers applied many chemical principles and effective scientific methods to overcome the difficulties in production one by one and wrote a brilliant chapter in the history of ancient Chinese chemistry. (A) of the understanding of natural brine solution Sichuan Basin underground brine rich resources. These salt brine deposits, in accordance with the age and morphological differences in mineralization, is divided into "yellow