The ancients had long noticed the influence of mercury and other metals on the formation of amalgam in alchemy practice? They make amalgam, besides tin amalgam, there is also gold? Silver? Amalgam of metals such as lead?
It can be seen from the above that the ancient alchemists studied the reaction of mercury in order to find a "magic pill" that could "dot" mercury into gold? Under the conditions at that time, their ideas could not be realized, but their practice expanded human understanding of natural phenomena?
Metal lead and its compounds appeared in China a long time ago. Before the Han Dynasty, our people were making cosmetic powder, that is, basic lead carbonate? The Book of Changes records: "Hu Fen was thrown into the fire. Is the color bad or lead?" This change attracted the attention of the then family and regarded it as one of the important research objects? In addition to extracting lead amalgam from lead, they also use it to make Huang Dan, namely lead tetroxide?
The late then family still has a lot of research on lead compounds. For example, there is a "Dan-making method" in the integration of lead and mercury by Qing Xuzi in the Tang Dynasty. Sulfur? A powder called "Huang Dan Hu Fen" can be made by melting three nitrates and "vinegar"?
The then family believed that taking "immortal" things such as gold, silver and minerals could make people's flesh and blood immortal, so they not only tried to take these things, but also extracted medicinal gold by artificial methods? Silver?
From Liu Che, Emperor of the Han Dynasty? Since Liu An, the king of Huainan, many emperors, princes, rich families and nobles have hired the Dan family at that time to make gold for them? This goal is impossible to achieve, but at that time, working people did have many inventions and creations in metallurgy on the basis of production experience?
Ge Hong recorded in Bao Puzi Huang Confessions that many alchemy books at that time were about refining "gold"? The method of "silver" is the so-called "yellow cypress bamboo"? He also mentioned tin? Leadership? Can mercury be materialized into gold by drugs? Silver, indicating that the Jin Dynasty Jin Dynasty Jin Dynasty family has been able to make all kinds of yellow or white alloys from all kinds of ordinary metals?
In the Northern and Southern Dynasties, Tao Hongjing recorded that realgar "can smelt copper into gold" in the Record of Famous Doctors, indicating that then the family knew to extract copper-arsenic alloy from arsenic-bearing minerals? This kind of alchemy was very popular in ancient China, and it didn't end until the Song Dynasty?
So is this family for sulfur? Arsenic and other "toxic" stone drugs should be burned before use, that is, tamed to make them lose or reduce their original toxicity? This process is called "reducing fire"?
Prescriptions for fire control all contain carbon, and saltpeter should be added to sulfur, and sulfur should be added to saltpeter. It can be seen that this family deliberately made the drug easy to catch fire and burn, so as to get rid of its "toxicity"?
Due to frequent fire accidents in Danfang caused by drug administration, the Jindan family in Tang Dynasty gained an important experience, that is, sulfur? Nitrate? Can three substances of carbon constitute a kind of "gunpowder"?
Another great achievement of pyroalchemy is the preparation of elemental arsenic? Ge Hong's "Bao Pu Zi Xian Yao Pian" recorded six methods to treat realgar, and the last method was to use saltpeter. Is the mysterious intestines, that is, the pig's large intestine and turpentine, "three things refined"?
Arsenic trioxide can be collected by melting realgar and saltpeter together, and then melted twice with carbon-containing pig intestines and turpentine, and then reduced to pure arsenic? This is the earliest method to prepare arsenic in the world?