The work of boiling salt was more arduous, and five or six older children were stripped naked and sweating profusely. Pen & Fun & Pavilion www.biquge.info

Because the requirements for potash used as fertilizer are not high in all aspects, Sun Yi has simplified the process of boiling salt, with the sole purpose of increasing the output of potash in a short period of time.

The two children boiled the water in a pot and kept adding salt to it.

The soil salt particles had accumulated at the bottom of the pot, and the children kept adding new soil salt to it while stirring.

In fact, at this time, the salt deposited at the bottom of the pot is only sodium chloride, and the potassium chloride in the pot is far from saturated.

An older child throws a "hydrometer" into the pot.

This "hydrometer", made by Sun Yi himself, is actually a thin wooden stick with a small stone tied to one end. When the "hydrometer" is placed in the water, one end of the stone will sink under the water, and the other end of the stick will come out of the water. When the concentration in the pot is larger, the more the stick will come out of the water.

The children kept adding soil salt to the pot, and the wooden stick part of the "hydrometer" was showing more and more.

"It's here!"

The older child saw a mark on the exposed stick and shouted.

According to Sun Yi's calculations and measurements, the brine in the pot at this time, whether it is sodium chloride or potassium chloride, has reached a saturated concentration.

The children scooped out the hot water from the pot, and half a pot of salt was deposited in the iron pot - these were mostly sodium chloride.

The children scooped out the sodium chloride and piled it aside, poured hot water into other containers to cool, and threw in small things like straw branches as crystallized attachments.

According to Sun Yicha's data, at 100 °C, 100 kg of water can dissolve 57 kg of potassium chloride, and when the water temperature is reduced to 20 °C, 100 kg of water can only dissolve 34 kg of potassium chloride. That is to say, as long as the boiling water is cooled, 23 catties of potassium salt will be precipitated.

Sodium chloride is different, and the solubility of sodium chloride does not change much with temperature. At 100 °C, 100 kg of water can dissolve 39 kg of sodium chloride, and at 20 °C, 100 kg of water can still dissolve 36 kg of sodium chloride. In other words, only 3 catties of sodium salt are precipitated out of 100 catties of boiling water.

In other words, after a cooling crystallization, Sun Yi will obtain potassium chloride with a purity of 88%.

In another pot, the two children repeated the same operation as the first pot with 88% potassium chloride.

The only difference is the "hydrometer".

When the "hydrometer" in the second pot reaches the scale, the brine only reaches the saturated solubility of potassium chloride, and the sodium chloride is far from saturated.

Therefore, when the hot brine in the second pot is cooled, the crystals obtained are pure potassium chloride with a purity that fully meets the chemical fertilizer standard.

Whenever the wet chemical fertilizer standard potassium chloride is fished out, there are people who have lined up early and can't wait to transport it to the crops.

Sun Yi couldn't help but sigh that nature is really magical. In fact, sodium and potassium are the same group of elements, their chemical properties are extremely similar, and they are often mixed together in nature. It's just that there is too much sodium on the earth, and the amount of sodium in the ground to a certain extent is called saline-alkali land, and the potassium on the earth is insufficient, so that it is necessary to refine potassium and sprinkle it in the ground, which is called fertilization.

Ha Laocai said that this batch of soil salt contains about 20 percent of Jia fertilizer, which means that the Tiemu Camp will get a total of 1,000 catties of Jia fertilizer, which is conservatively estimated to increase the output of 15,000 catties of grain, which is equivalent to more than 100 acres of land out of thin air.

At the current rate of refining, the salt in the camp will soon run out, and it is necessary to send people to the salt lake immediately to carry the salt back and scatter it in the ground before the crops are filled, and the salt in the camp will accumulate more and more.

Sun Yi agreed, and it seemed that the caravan of the Flower Cabinet had to set off as soon as possible.

As for the amount of salt that will accumulate more and more, Sun Yi decided to distribute it all to the people for free.

Ha Laocai said that he had asked several township parties in private, and they all thought that the refined salt tasted light.

Sun Yi had no choice, and he couldn't throw the salt away and cause the salinity hazard of the land, so he had to arrange it with a bitter face, "Talk to the villagers well, and ask them to help overcome it." ”

When he arrived at the edge of a accumulated brine, Ha Laocai asked Sun Yi again, "These are all brine that has been refined several times, and there is no way to deal with it, if it falls into the ground, I am afraid that it will destroy the crops." This brine is actually a good thing, you can order tofu, and you can exchange money when you were in Shaanxi before, but now it's a pity! ”

According to Sun Yi's refining method, the sodium and potassium in the brine have been almost precipitated, and the main components concentrated are calcium and magnesium. Water that contains a lot of calcium and magnesium is called hard water, and the brine after boiling salt is very, very hard, so you can order tofu.

In chemistry, sodium and potassium are relatives of a family, and the name of the family is "alkali metal", so it makes perfect sense for Daoist Jia to add the word "Jia" next to the word "Jia"; Calcium and magnesium are relatives of another family, whose name is "earth metal", or to put it bluntly, stone. Like sodium and potassium, calcium is everywhere, and magnesium is too precious.

Sun Yi decided to bring out the magnesium in the brine.

Sun Yi asked someone to scrape some clean alkaline noodles in the alkaline field and pour them into the brine.

The chemical composition of alkaline noodles is sodium carbonate. Carbonate ions meet magnesium and calcium ions in water to form magnesium carbonate and calcium carbonate precipitates – this is junior high school chemistry.

As the precipitation in the brine increased, Sun took them out.

Calcium carbonate is limestone, which is not very useful.

Magnesium carbonate Sun checked it out, and it was actually a medicine!

Sun Yi then introduced to Ha Laocai, the temporary person in charge of the "pharmaceutical factory": "This thing is a mild laxative, which can be laxative, I don't know if it is useful?" ”

Ha Laocai asked: "Master said that this is a mild laxative, but if you eat too much, it won't hurt your body?" ”

Sun Yi replied with certainty: "No!" ”

Ha Laocai gasped, "This medicine is a good thing!" ”

Ha Laocai turned around and shouted, "Slippery ghost! Come here! You're going to make a lot of money! ”

The flower head cabinet was squatting to help boil liusu, and hurriedly ran over when he heard the words.

Ha Laocai said to the two: "I heard that the nomads use beef and mutton as rations, which is not easy to digest, so they have to trade tea with the Ming Dynasty. If the nomad does not drink tea, the stool will not be smooth, and if it is heavy, he will be suffocated to death! With this mild laxative, won't you be able to suffocate to death? ”

Sun Yi almost burst out laughing, and some people believed this ridiculous statement.

I didn't expect the flower head cabinet to look right, "Yes, yes, yes!" This thing can definitely sell Da Yingzi! ”

Sun Yi couldn't help it, and waved his hand to the two with a smile, "The statement that nomads can't live without tea is absolutely false." If you don't drink tea, you will be suffocated, think about it, where did the nomads come from before the invention of tea? ”

The flower head cabinet straightened his waist, "What the master said is wrong!" It doesn't matter where his nomadic life comes from! Tea matter, no matter whether he is right or wrong, anyway, many nomads believe it! As long as he believes, Eza can sell this gut-moistening laxative! It can also be sold for a big price! ”

Sun Yi thought about it, what the flower head cabinet said was also right! Scientists and doctors can't tell whether the health care products that sold very well in later generations are effective or not, but a large number of people believe that they can be sold.

Sun Yi looked at the precipitate fished out, there are both magnesium carbonate and calcium carbonate here, and if it is used as a laxative drug, calcium carbonate does not need to be separated.

Sun Yi took the watery stone powder, weighed the precipitation and mixed it into it, mixed it well, added water to make a paste, and divided it into small portions of the same size, and the three of them immediately kneaded the small portions of paste into a snow-white pill.

Sun Yiyi: "This is also to be given away first and then sold." ”

Huatou Cabinet immediately named the white pill - "Wolf Mountain Intestinal Moistening Pill".