Yanhuang College.
In the meeting room of Guanghua Building, Wang Ji's face was full of excitement. He pulled Li Zexuan to the workshop, completely forgetting that he wanted to "deal" with Li Zexuan as soon as possible so that he could go back and memorize the "Confidentiality Regulations".
As the leader of the chemistry department, Wang Ji had the most thorough understanding of the "Chemistry" textbooks compiled by Li Zexuan. No one understood the important role of sulfuric acid better than him. It could be said that in the "Chemistry" textbooks written by Li Zexuan, a considerable number of chemical reactions were directly or indirectly related to sulfuric acid.
As early as last year, Wang Ji had experimented by himself and used green alum to produce dilute sulfuric acid. However, that method could produce dilute sulfuric acid in small amounts, but it was obviously impossible to produce sulfuric acid or concentrated sulfuric acid in large amounts!
Later, Li Zexuan introduced him to the method of using sulfur dioxide and vanadium pentoxide as a catalyst, heating it in the air to produce sulfur trioxide, and then producing concentrated sulfuric acid. He had been looking forward to Li Zexuan quickly finding the legendary vanadium mine, but he didn't expect to wait for four months!
Now that the vanadium mine had finally arrived, how could he not be excited?
Under Wang Ji's urging, the two quickly arrived at the ironworks of the workshop.
But at this time, Wang Ji was a little confused, because he didn't know how to extract vanadium from vanadium titanomagnetite!
Wang Ji looked at Li Zexuan and asked, "Yamachō, how do we refine this ore to extract the vanadium from it?"
In fact, Li Zexuan had been thinking about this problem on the way here. Hearing this, he replied in a deep voice,
When he heard this, he replied, "The vanadium titanomagnetite mainly contains metal oxides such as iron, vanadium, titanium, chromium, cobalt, and other metals. We can put it in the blast furnace and mix it with soda ash for roasting. Under the action of high temperature and sodium salt as an additive, the silicon oxide tetrahedron and silicon oxide tetrahedron containing vanadium in the vanadium titanomagnetite will be destroyed, exposing the vanadium and transforming it into pentavalent vanadium.
After that, the sodium ions in the soda ash would react with it. The resulting sodium vanadate salt would be soluble in water, but the residues of the other impurities would not be soluble in water. Therefore, we can use the method of soaking in water to hydrolyze the crude vanadium, then filter out the impurities, and precipitate the refined vanadium salt from the solution! After the refined vanadium salt is precipitated and calcined, we can obtain the catalyst we need, vanadium pentoxide! "
The method Li Zexuan was talking about was called the process of extracting vanadium by roasting with salt. It was a relatively primitive method of extracting vanadium. The sodium salt could be used as the choice of soda ash (sodium carbonate), sodium sulfate, or table salt (sodium chloride). Comparatively speaking, the roasting effect of sodium chloride was the best, but sodium chloride would undergo a redox reaction at high temperatures to produce chlorine gas, which would seriously pollute the atmosphere. Therefore, Li Zexuan did not choose this method!
In addition, the main advantage of adding sodium carbonate for roasting was that the equipment needed was simple, and the raw materials needed were readily available. For example, soda ash. Although no one in ancient times could synthesize it artificially, there was a lot of soda ash in nature.
However, the drawback of this method was also obvious, and that was waste! Because the main product of this method was vanadium pentoxide, the other metal components such as iron, titanium, chromium, cobalt, and so on were directly filtered out as residues, especially iron. It should be known that the iron content of vanadium titanomagnetite was as high as 20% to 30%, but the vanadium content was less than 2%!
Therefore, this method of extracting vanadium was a great waste for iron. However, Li Zexuan did not care about this now. What he needed was vanadium, not iron!
Wang Ji now had a good foundation in chemistry, but after listening to Li Zexuan's theory of the vanadium extraction process, he still could not quite catch up. He stood there for a long time before he finally reacted. Then, he nodded and said, "Since Yamachō has a method, then I will do it! However, I still need Yamachō's guidance from the side! "
An old man in his forties or fifties asking for guidance from a young man in his teens. This scene was strange no matter how one looked at it. However, when Wang Ji said this, his tone was natural and there was no awkwardness at all!
He admitted that he was far inferior to Li Zexuan in chemistry!
"En! Good! Then let's begin! "
Li Zexuan nodded and said.
…
While Li Zexuan was immersed in scientific research, in Chang 'an City, in the palace, Old Li, who had just finished the morning court, was enjoying tea with his family in the garden of the West Court.
He was now completely in love with the taste of the Immortal Tea!
If someone were to bring him a cup of the same tea as before, he would definitely ask someone to pour it away! Because compared to this Immortal Tea, the old tea was simply rubbish!
In addition, Old Li clearly remembered that when Li Zexuan delivered the Divine Tea to him that day, he also gave him a note. On the note, it was clearly written, "Drinking it can refresh one's spirit, reduce fatigue, aid digestion, and slow down aging." Yes, that was what he valued the most about the "slow down aging" part!
Last year, when Li Er asked Li Zexuan if there was a way to live forever in the world, Li Zexuan mercilessly refuted him. Therefore, he could not ask Li Zexuan if the Immortal Tea could really slow down aging. However, he believed that Li Zexuan would definitely not say such things, so he chose to believe him! What's more, the Immortal Tea itself tasted so good. What reason did he have not to like drinking it?
In fact, drinking tea could slow down aging. This Li Zexuan really did not lie to Li Er. This was because the tea polyphenols in the tea had an inhibitory effect on various oxidative enzymes and could efficiently eliminate free radicals. It was the fastest antioxidant pathway. At the same time, it could inhibit the production of free radicals and activate the body's antioxidant enzyme system. Research showed that the antioxidant effect of tea polyphenols was significantly better than vitamin E, and the anti-aging effect was 18 times stronger than vitamin E, and it had a synergistic effect with vitamin C and E.
However, if he wanted to rely on tea to live forever, then Li Zexuan could only say to Old Li, "You think too much." If the tea was really so amazing, then wouldn't the people who sold tea in the modern era all become rich?
"Haha! Guanyin Maid, you say Li Zexuan really has a big mouth. He actually named this tea as the Immortal Tea? "
Li Er took a sip of tea and said contentedly.
Empress Zhangsun smiled and said, "The tea brewed from the tea leaves has a clear color and a smooth taste. When drunk, the tea fragrance is endless. Moreover, drinking this tea can reduce fatigue and slow down aging. Just based on these, I think it is not an exaggeration to call it the Immortal Tea!"
Li Er smiled and did not deny it.
However, the eyes of Consort Yin, who was sitting opposite him, lit up. She hurriedly asked Empress Zhangsun, "Sister, can this Immortal Tea really slow down aging?"
Women loved beauty, especially the women in the imperial harem. Who didn't want to be able to stay young forever?
Empress Zhangsun smiled faintly and said, "This is only what I heard from the Marquis of Yong 'an. Whether or not younger sister believes it is up to you!"
Consort Yin smiled and said, "The Marquis of Yong 'an is so young, yet he is proficient in both the pen and the sword. Since he said so, it must be true. I just don't know when he can supply large amounts of this Immortal Tea to the imperial harem! "
Changle, who was at the side, smiled and said, "After brother Xiao Xuan supplies the Immortal Tea to the imperial harem, Changle will definitely drink tea every day!"
Li Chengqian was speechless and said, "Changle, how old are you? You're already thinking of slowing down aging?"
Li Er also looked at his daughter with a face full of amusement and adoration.
Changle smiled sweetly and said, "Changle doesn't want to grow up. This way, I can always accompany Imperial Father, Imperial Mother, and Imperial Brother Crown Prince!"
As soon as these words were said, it immediately caused laughter everywhere. For a moment, the garden was very warm.
After a while, Zhao Song walked over and whispered a few words into Li Er's ear. Li Er's eyes flashed, and then he stood up and said, "I have some matters to deal with. Changle, Chengqian, accompany your mother to drink tea!"
"Yes! Imperial Father! "
Changle and Li Chengqian hurriedly stood up and acknowledged.
Li Er nodded and led Zhao Song out of the West Court.
"Li Zexuan's servants came back from the land of Sichuan, right? You said they looked very miserable? "
After exiting the West Court, Li Er asked as he walked.
Zhao Song bowed slightly and said, "Yes, Your Majesty! At the beginning of the year, the Marquis of Yong 'an sent his servants to Sichuan to search for ores. Many people knew about this matter. This morning, his servants returned to Lantian with a few soldiers. Their clothes were tattered and they looked very miserable! "
Li Er frowned and said, "Did they encounter bandits on the way? Or did they encounter an accident in Sichuan? But they have Li Zexuan's fish talismans. What kind of accident could they encounter in Sichuan? Could it be that the situation in Sichuan has changed? "
Thinking of this, Li Er's expression became incomparably grim. After all, the Tang Empire had just experienced a rebellion. He had to be cautious!
Zhao Song's face darkened, and he did not dare to reply.
Li Er continued to ask, "Where is Li Zexuan now? His subordinates have suffered such grievances. How can he sit still? "
Zhao Song replied, "Your Majesty, the Marquis of Yong 'an is currently in the workshop. He must be refining the ores that his servants brought back!"
"Oh!"
Li Er could not help but heave a sigh of relief. This was because if there was really a situation in Sichuan, Li Zexuan should have come to the palace to report to him immediately and not go to the workshop to refine ores. Li Zexuan was a person who knew his priorities.
"Alright! You can leave! That kid will definitely enter the palace to look for me! "
Li Er waved his hand and smiled.
...
On the other side.
After nearly six hours of painstaking refining, Li Zexuan finally obtained a grayish-black flake of vanadium pentoxide!
"Yamachō, is this the catalyst that we need, the vanadium pentoxide?"
At this time, Li Zexuan and Wang Ji had already put on their "masks". Wang Ji pointed at the grayish-black flake and asked.
Li Zexuan grabbed Wang Ji's hand and said, "Don't touch it with your hands. This thing is not only harmful to the respiratory tract, it is also harmful to the skin. Go put on a pair of rubber gloves and put it into a bottle! This thing is basically confirmed to be the vanadium pentoxide that we need. The rest of the experiments can be done later. I have to go to the palace now! "
...
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