And now, because of the limited conditions......

Well, the showdown, no more pretending!

It's just that I didn't study chemistry well at the beginning, and then I chose liberal arts, and my chemistry classes are basically in Internet cafes, okay!

Therefore, Wu Liang could not get the messy chemical reagents used in the coarse salt purification experiment, so he planned to use the "five-step salt production method" that had been used for more than 1,300 years since the early Tang Dynasty to purify these coarse salts.

However, looking at the appearance of Chen Jinshui and others, Wu Liang knew that it was useless to talk to them, so he simply did not continue to popularize science.

Soon after.

Dian Wei finally crushed all the dozens of catties of coarse salt in the salt iron basin.

Wu Liang didn't have a large enough container to fully dissolve all of these coarse salt powders with water.

So he only took about 5 catties from it and put it into another large vat, and then asked Chen Jinshui and others to fetch some water, and stirred while filling the vat with coarse salt powder, so that the salt powder dissolved quickly.

During this period, he ordered Dian Wei to pour the remaining salt powder into a small jar and put it up for later use.

He took out the copper dagger stolen from the tomb of King Liang Xiao, squatted on the ground and pried a layer of hard, thick white substance like scale attached to the inside of the salt iron basin.

"I said talented brother, you are already expensive Sima, I don't know how much salt you can buy for a month, there is no need to save so much, right?"

Chen Jinshui and the others looked funny and couldn't help but joke.

"Sima!?"

Hearing this official position, Dian Wei's movements couldn't help but pause, and he looked at Wu Liang even more unexpectedly.

He had been speculating about Wu Liang's identity just now, but although he had thought about 10,000 possibilities, he never expected that Wu Liang was actually a Sima ......

To tell the truth, Dian Wei is no longer a recruit, and he has seen not hundreds of officers but dozens of them, although Sima is still a relatively high-ranking officer among the officers he has seen.

But Wu Liang is definitely a special case.

This person didn't have the frame of an officer at all, and even if it wasn't for Chen Jinshui and others to say it, he wouldn't be able to associate Wu Liang with the army, let alone Sima.

While Dian Wei was surprised, Wu Liang was still concentrating on "being greedy for small gains".

"Click!"

With a soft sound, a piece of white matter was finally pried off by him.

It's fucking strong, it's as hard as a stone!

So, it's not salt.

Or it's not ordinary salt, commonly known as "nitrate", the chemical name seems to be called "white what sodium, magnesium, what alum", who knows the specifics.

Wu Liang only knew that this was a mineral crystalline aggregate formed during the long-term boiling of salt.

In the "five-step salt production method", this thing plays a vital role, it is not soluble in water, and can analyze most of the elements in coarse salt that cannot be seen by the naked eye but are harmful to the human body, this is of course a chemical problem, but the specific principle Wu Liang can't say clearly, anyway, it's useful, no matter what it does, right?

"Why don't you let me come?"

Seeing that Wu Liang was struggling, Dian Wei walked over with considerable insight and said, this alone is much stronger than Chen Jinshui's two stunned people.

"Okay! Pry it all down, but this time you don't need to make it into powder, just knock it into pieces the size of sheep dung and eggs. ”

Wu Liang decisively stuffed the dagger into Dian Wei's hand, and turned around to see the coarse salt water stirred by Chen Jinshui and others.

At this moment, the salt powder in the water has completely dissolved, and the muddy smell emitted is even more serious, and the color of the water has completely turned yellow-brown, which looks a little disgusting.

"Lift it up and pour it into that jar, be sure to be slow, don't spill it."

Wu Liang pointed to the large vat next to him that he had covered with four layers of linen.

Chen Jinshui and others still don't know why, but they can only do it.

As the coarse brine was gradually poured in, there were a lot of small stones of different sizes and dregs of unknown composition left on the linen, Wu Liang uncovered the linen cloth on it, and although the color of the coarse brine in the jar became lighter, it was still yellowish-brown.

"Flush that tank clean and do it all over again."

In this way, the two cylinders were exchanged, and the cycle was repeated many times, and the coarse brine in the tank was still faint yellow, but the linen cloth basically could not filter out impurities, and the color of the coarse brine was no longer changed, so Wu Liangcai finally stopped.

At the same time, Dian Wei finally finished disposing of the "nitrate plate" in the salt and iron basin.

Wu Liang took a linen cloth and wrapped these "nitrate grains" on them, made a simple funnel out of ready-made things, stuffed the wrapped "nitrate grains" into the bottom of the funnel, and then put them on an empty cylinder.

"Get up, strain it twice."

"Coming back?"

"Do you want to eat meat and drink wine at night?"

"It's coming, it's coming!"

Everyone hurriedly got up to help.

This time, there is an extra "nitrate granular" funnel, and the filtration process is much slower.

But the salt water flowing from under the funnel has completely lost its faint yellow, and it is as crystal clear as a mountain spring.

Wu Liang knew that this was a chemical reaction on the nitrate plate, and he had already resolved the impurities in the brine that could not be seen with the naked eye, at least most of them.

As for why there is a nitrate plate in the salt iron basin, it cannot play the same role in the process of boiling salt in the salt row?

It is because at this time, the salt line boils salt with brine slurry that has been seriously saturated by drying, and it is directly boiled, and the viscous brine slurry can not be fully in contact with the nitrate plate at all, even if a small part of the chemical reaction is completed, it can no longer be filtered in this link, and the impurities produced after the reaction can not be filtered out in time, so not only can it not play a role in purification, but it will cause secondary pollution to the final boiled salt.

In this way, Wu Liang is still not at ease.

After filtering twice in this way, a pile of firewood was finally lit around the vat and the final step of extracting refined salt was entered - heating and evaporating water, waiting for saturation and crystallization.

It will be a relatively slow process, but Wu Liang is very comfortable, sitting on the sidelines and patiently waiting for the birth of the masterpiece, which is undoubtedly a rare life experience for a modern person living in the 21st century, full of a sense of achievement.

And what Wu Liang did was so strange in the eyes of Chen Jinshui, Dian Wei and others, they never understood what Wu Liang was doing.

It wasn't until the afternoon that I saw some extremely pure white crystals scraped off the inside of the water tank by Wu Liang.

"It's ......"

The crowd was puzzled.

"Salt, taste?"

Wu Liang smiled contentedly, rejoicing like a child.

"Shouldn't salt be yellow?"

Yin Jian asked puzzledly, even the refined salt in the inner hall of the salt shop for the "Tianlong people" was also faintly yellow.

So in his mind, the salt should be yellow, not the pure white of this snow.

Saying this, Yin Jian tried to glue a little bit of rice grain the size of a grain of crumble with his fingers and put it in his mouth.

"Shhh...... It's so salty! But melts in your mouth, it's salt! ”

Although he grinned saltily, Yin Jian's eyes were full of surprise, "This salt has no strange taste, and it looks very good, if the salt in the inner hall of the salt shop is called refined salt, your salt is the refined salt in the refined salt!" ”