But now, because of limited conditions...

Okay, let’s show off, stop pretending!

It’s just that I didn’t study chemistry well at first, but later I chose liberal arts. I basically took chemistry classes in Internet cafes, okay?

Therefore, Wu Liang could not come up with the messy chemical reagents used in the original coarse salt purification experiments, 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.

Purify.

However, looking at the looks of Chen Jinshui and others, Wu Liang knew that talking to them would be in vain, so he simply did not continue to popularize science.

Soon after.

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

Wu Liang did not have a large enough container to fully dissolve all the coarse salt powder with water.

So he only took about 5 kilograms from it and put it into another large vat. Then he asked Chen Jinshui and others to fetch some water, and filled the vat with coarse salt powder while stirring, so that those

Salt powder dissolves quickly.

During this period, he ordered Dian Wei to pour the remaining salt powder into a small vat and store it for future use.

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

"Brother Youcai, you are already a Sima. I don't know how much salt you can buy with a month's salary. There is no need to be so frugal, right?"

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

"Sima!?"

Hearing this official position, Dian Wei couldn't help but stop for a moment, and looked at Wu Liang in surprise.

He had been speculating on Wu Liang's identity just now, but even though he had thought about ten thousand possibilities, he never expected that Wu Liang was actually a Sima...

To be honest, Dian Wei is no longer a new soldier, and has seen dozens if not hundreds of officers. Although Sima is still considered to be a relatively high-ranking officer among the officers he has seen.

But Wu Liang is definitely a special case.

This man didn't have the airs of an officer at all. Even if Chen Jinshui and others hadn't spoken out, he wouldn't have been able to connect Wu Liang with the army, let alone Sima.

While Dian Wei was surprised, Wu Liang was still concentrating on "taking advantage of small things".

"Crack!"

With a soft sound, he finally pried off a piece of white material.

This thing is so damn strong, as hard as a rock!

So, it's not salt.

In other words, it is not an ordinary salt, commonly known as "nitrate plate". The chemical name seems to be "white sodium, magnesium, and vitriol". Who knows the details.

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

In the "five-step salt production method", this thing plays a vital role. It is neither soluble in water nor can decompose most of the elements in coarse salt that are invisible to the naked eye but are harmful to the human body. This is of course a

Regarding chemistry, Wu Liang couldn't explain the specific principles. Anyway, as long as it's useful, it doesn't matter what it does, right?

"Why don't you let me do it?"

Seeing that Wu Liang was struggling, Dian Wei came over very discerningly and said, this alone is much better than those fools like Chen Jinshui.

"Okay! Pry them all off, but this time you don't have to turn them into powder, just smash them into pieces the size of sheep dung eggs."

Wu Liang decisively thrust the dagger into Dian Wei's hand, and turned back to look at the crude salt water that Chen Jinshui and others were stirring.

At this moment, the salt powder in the water has completely dissolved, the muddy smell is getting worse, and the color of the water has completely turned yellowish brown, which looks a bit disgusting.

"Put it up and pour it into the jar. Be sure to do it slowly so as not to spill it."

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

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

As the crude salt water was gradually poured in, a lot of pebbles of different sizes and residue of unknown composition were left on the linen cloth. Wu Liang uncovered the linen cloth on it. Although the color of the crude salt water in the tank became lighter, it still had the same color.

tan.

"Rinse out the jar and do it again."

The two tanks were used interchangeably and the cycle was repeated many times. The crude brine in the tank still showed a light yellow color, but the linen cloth could no longer filter out impurities. The color of the crude brine no longer changed after filtering again. Wu Liangcai finally called a stop.

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

Wu Liang then took linen cloth and wrapped these "nitrate granules", made a simple funnel with ready-made items, stuffed the wrapped "nitrate granules" into the bottom of the funnel, and then placed it on an empty cylinder.

"Everyone, get up and filter it twice more."

"Again?"

"Do you still want to eat meat and drink wine tonight?"

"I'm coming!"

Everyone quickly stood up to help.

This time there is an extra "nitrate plate" funnel, which makes the filtration process much slower.

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

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

As for why the nitrate plate in the salt iron basin cannot play the same role in the process of boiling salt in the salt shop?

This is because at this time, the salt shops used brine slurry that had been heavily saturated in the sun, and it was boiled directly to dryness. The thick brine slurry could not fully contact the nitrate plate. Even if a small part completed the chemical reaction, this link

It can no longer be filtered, and the impurities produced after the reaction cannot be filtered out in time. This will not only fail to purify, but will cause secondary pollution to the final cooked salt.

Even so, Wu Liang was still worried.

After filtering twice more with this method, I finally lit a pile of firewood around the large vat and entered the final step of extracting refined salt - heating to evaporate the water and waiting for saturation to crystallize.

This will be a relatively slow process, but Wu Liang is very comfortable, sitting aside and patiently waiting for the birth of his masterpiece. This is undoubtedly a rare life experience for a modern person living in the 21st century.

Full sense of achievement.

But what Wu Liang did was so weird in the eyes of Chen Jinshui, Dian Wei and others, they still didn't understand what Wu Liang was doing.

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

"This is……"

Everyone was puzzled.

"Salt, taste it?"

Wu Liang smiled contentedly, as happy as a child.

"Shouldn't salt be yellow?"

Yin Jian asked puzzledly, even the refined salt in the inner hall of the salt store, which is exclusively for "Tianlong people", still has a faint yellow color.

So in his impression, salt should be yellow, not pure white like snow.

Saying this, Yin Jian tried to pick up some rice-sized crumbs with his fingers and put them in his mouth.

"Hiss...it's so salty! But it melts in your mouth, it's really salty!"

Although he grinned because of the saltiness, Yin Jian's eyes were full of surprise, "This salt has no strange smell and looks very good. If the salt in the salt shop is called refined salt, your salt is the best in refined salt."
Chapter completed!