Four hundred and eighteenth chapter concentrated sulfuric acid
Li Zhi looked at the jar of green vitriol oil and nodded. Cao Shoudao found a scrap iron stick from the house and put the scrap iron stick into the green vitriol oil. After a while, there were tiny
Small bubbles emerged from the iron rod little by little, and the colorless green vitriol oil turned into light green.
Li Zhi knew that this was the reaction between dilute sulfuric acid and iron, producing ferrous sulfate and hydrogen. Of course, there is a large amount of sulfurous acid in this green vitriol oil. But sulfurous acid is not stable. As long as it is left to stand for a period of time, sulfurous acid will
will be oxidized to sulfuric acid.
With sulfuric acid, Li Zhi could make nitric acid. Li Zhi was very happy and said, "Taoist Master Cao, how much money can you sell me for this set of technology?"
Cao Shoudao said: "Uncle, this set of things I have looks simple, but in fact it is very effective. Not an inch of green vitriol is wasted, and not a trace of green vitriol oil leaks out. This is a skill passed down by the ancestors. If Uncle Ruo
If you want to buy it, I will sell it to my uncle at a price of one hundred taels."
Li Zhi blinked his eyes and secretly thought that this Taoist priest really knew how to do business. In the past, the mercury refining equipment was sold to him for one hundred taels, but now the green vitriol oil technology cost another one hundred taels. Li Zhi licked his lips and made a counter-offer.
Said: "Taoist Master, this equipment looks far less complicated than Mercury's set of equipment, how can it be sold for one hundred taels?"
Cao Shoudao stroked his beard and pondered for a long time, and then said: "Eighty taels! Eighty taels are sold to my uncle. It can't be any less. Any less will be a disservice to my master."
Li Zhi smiled and negotiated the price with Cao Shoudao for a few more times, but Cao Shoudao insisted on eighty taels. Speaking of which, Cao Shoudao helped Li Zhi solve the source of the sulfuric acid, and his credit was not small. Li Zhi did not
The only solution was to pay eighty taels to this Taoist and buy his skills.
After Cao Shoudao got the money, he gave the set of jars and pots to Li Zhi's personal guards. Everyone took Cao Shoudao back to the General Military Mansion. Cao Shoudao guided Li Zhi's personal guards in the backyard of the General Military Mansion.
He built a small earthen stove and taught his guards how to use it and what to pay attention to.
Li Zhi stood aside and listened for a while, and then realized that there were many tricks in it. There were several key points in how to heat the crucible. If he had to figure it out on his own without anyone's guidance, it would probably take him several months and burn out countless raw materials and materials.
Only the equipment can be found.
This eighty taels of silver is not too deceptive to say the least.
Li Zhi's personal guards learned Cao Shoudao's technique and performed it several times on the spot. After confirming that they had mastered it, Cao Shoudao left the General Military Mansion with a fly whisk.
After obtaining dilute sulfuric acid, Li Zhi will start making concentrated sulfuric acid. Only when concentrated sulfuric acid is obtained can nitric acid be made.
It is quite difficult to make concentrated sulfuric acid from dilute sulfuric acid. Because sulfuric acid cannot be purified by simple distillation. If you want to purify sulfuric acid through distillation, you must use vacuum distillation. And vacuum distillation requires a vacuum pump or similar equipment. For now
For Li Zhi, this was simply unobtainable.
However, Li Zhi had played with sulfuric acid before traveling through time. At that time, the government controlled the concentration of sulfuric acid and did not allow stores to sell concentrated sulfuric acid. Only 70% of sulfuric acid was sold. At that time, Li Zhi studied many methods to purify sulfuric acid, and finally found a
The simplest and most feasible purification method is to electrolyze dilute sulfuric acid.
The so-called electrolysis of dilute sulfuric acid actually means electrifying dilute sulfuric acid. After the sulfuric acid solution is energized, the water in it will be electrolyzed into hydrogen and oxygen, while the sulfuric acid will be preserved. After being energized for a long time, the dilute sulfuric acid will become
High concentration of concentrated sulfuric acid.
Li Zhi had made a simple generator before, and this time the generator came in handy.
However, to decompose the water in dilute sulfuric acid, a larger power generator is needed. Human power cannot achieve such power, so a steam engine is needed to drive the generator to rotate. Li Zhi made a larger copper coil this time, so
The copper wires were all insulated with a thick layer of varnish, driven by a steam engine, and placed in two large magnets.
Li Zhi found several graphite crucibles used for steelmaking, and cut two pieces of graphite from them to make electrodes. The two electrodes were connected to the two poles of the generator and put into the dilute sulfuric acid solution.
As soon as the steam engine is started, the coil is driven by the steam engine to rotate at high speed in the magnetic field, generating electricity. The power of this steam engine is quite large, and the current generated is not small. As soon as the two graphite electrodes are put into the dilute sulfuric acid solution, the solution seems to boil.
, large and large bubbles kept popping up.
After half an hour, a large porcelain basin of dilute sulfuric acid was electrolyzed into half a basin of viscous liquid.
Li Zhi took a small wooden stick and stuck it into the viscous liquid. The small wooden stick was corroded into charcoal in an instant. Obviously, this was the concentrated sulfuric acid Li Zhi needed.
The concentrated sulfuric acid is now ready.
After the concentrated sulfuric acid has been prepared, it is necessary to use the concentrated sulfuric acid to make nitric acid before finally using the nitric acid to make new gunpowder.
With sulfuric acid, it is very simple to make nitric acid. Just heat saltpeter and concentrated sulfuric acid together slightly to get nitric acid gas. Let the nitric acid gas pass through cold water, and the nitric acid will dissolve into the water, gradually forming a high-concentration nitric acid solution.
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However, Li Zhi had never made nitric acid before traveling through time. He only knew the principles and equations of the reaction. The first time he heated saltpeter and concentrated sulfuric acid in a sealed crucible, what he got was a pot of viscous liquid. Li Zhi was confused at that time
I was stunned for a moment, secretly thinking that nitric acid shouldn't be sticky.
As a result, the guard platoon leader named Zhang Yu who was working for Li Zhi next to him said: "Uncle, I'm afraid the fire is too strong and the sulfuric acid has burned into water vapor. I'm afraid this sticky pot is still sulfuric acid."
Only then did Li Zhi realize. He secretly thought that the sulfuric acid and saltpeter had not had time to react, and the sulfuric acid was boiled by the flames.
Li Zhi didn't expect that the guard platoon leader who was working for him was so smart. He figured out what sulfuric acid was in such a short time and thought faster than himself.
"How do you know this is sulfuric acid? Do you know what sulfuric acid is?"
The guard platoon leader said calmly: "Isn't it true that my uncle has been talking to Taoist Master Cao about sulfuric acid, sulfuric acid? Sulfuric acid is this sticky green vitriol oil, and I understand it too!"
Li Zhi looked at the smart guard platoon leader and secretly thought that Zhang Yu was so clever and could be put to great use. But not for the preparation of this new type of gunpowder. Li Zhi was still prepared to keep the preparation of this new type of gunpowder a secret. This picture
Yu was so smart that he could figure it out while watching, so Li Zhi couldn't keep it a secret.
Li Zhi waved his hand and said: "Zhang Yu, you go back to the barracks. You are not needed today. Call that slow-moving Xiao Youke and ask him to help me."
Zhang Yu was stunned, wondering why his uncle didn't let him do odd jobs. He also wanted to take the opportunity to get acquainted with his uncle, so that he could get greater opportunities to serve in the future, but he didn't expect that the opportunity was lost all of a sudden. He said it wrong
Talked?
Zhang Yu quickly agreed, walked down with some disappointment, and called another guard platoon leader over.
