The weapon tycoon who traveled to Daqin

Sodium carbonate, commonly known as soda ash, soda ash, washing soda, chemical formula: Na CO

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Sodium carbonate that exists in nature (such as salt water lakes) is called trona. This is currently the main source of sodium carbonate in Qin. However, the output is very limited. This is also one of the reasons why related industries such as glass, textiles, and chemicals cannot develop rapidly.

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It can be said that the development of sodium carbonate is now showing signs of restricting the development of Qin's chemistry.

The preparation of sodium carbonate in the laboratory mainly relies on the reaction of sodium hydroxide and carbon dioxide.

As early as 1791, the ancients began to use salt, sulfuric acid, coal, and limestone as raw materials to produce sodium carbonate. This method is called the Lubrand method. The raw materials of this method are not fully utilized, the working conditions are poor, and the product quality is poor.

Alvi method instead.

Solvay method. In 1859, the Belgian Solvay used salt, ammonia and carbon dioxide as raw materials to precipitate sodium bicarbonate from the solution at room temperature. Heating it decomposes into sodium carbonate. This method is called

The Soxhlet method of making alkali is still used today.

Hou Debang Method In 1943, Chinese Hou Debang returned from studying abroad. He improved the Solvay method based on the national conditions of salt shortage in mainland China. He combined the two major industries of soda ash and synthetic ammonia to produce sodium carbonate and fertilizer ammonium chloride at the same time, which greatly improved the efficiency of the Solvay process.

It improves the utilization rate of salt and is the Hou's method of making alkali.

Of the four methods, only the last two can be used: Solvija and Houdbon methods. However, these two require another chemical, ammonia.

Camel dung is a commonly used fuel in the desert, and even the sacred Zeus has to condescend to it. Due to the long-term burning of camel dung, the walls and ceilings of Zeus-Amo's temple are covered with a layer of soot. This soot contains some elephants.

White crystals like salt emit bursts of pungent odor from time to time. The locals call this white crystal mmonic (salt of the god Amos). In 1774, the British chemist Priest listed

He collected this pungent smelling gas and studied it. He found that this gas was soluble in water and showed alkalinity, so he called it "alkali gas". However, this term was not used for

It was accepted by the chemical community, and finally, people gave it the name "am-monia" from the source of this gas, "the salt of Ammon". This is what we call "am-monia" today.

Ammonia'" compound.

If Naofumi wants to make ammonia, he can only use this crystal and calcium hydroxide to heat it. Thinking of the unpleasant smell, Naofumi's stomach feels unappetizing. But he still has to do it. But before that, he also needs to make a "gas mask"

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And this kind of crystal can only be collected from feces. I guess some people don't know it yet. Saltpeter is not a big deal in the East, but it is quite frequent in Europe. These are the reasons why Europe developed chemistry, but after they discovered the power of muskets,

It developed rapidly. But saltpeter was in short supply. People later discovered that nitrate was contained in human and animal excrement, so they collected it in large quantities. They even strictly controlled human excrement. This can be regarded as a contribution to chemistry.

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Human wisdom is always to quickly find another way to obtain an item when it is lacking.

Naofumi needs a large amount of activated carbon. At the same time, people need to pay attention to the crystals formed after the excrement is dried. This takes time.

One night, Shangwen went in and out, spending a whole night, and finally only made a few pieces of furniture. Shangwen lay in a daze on the newly made leather sofa and followed.

Ying Yu slept very comfortably until the sun rose high.

Ying Yu stretched out greatly, feeling that he had never slept on such a comfortable bed, and that he had really come to the right place.

Ying Yu walked out of the outer room and found several strange things in the room.

"Hey, hey." Ying Yu woke up Shang Wen with curiosity.

Shangwen stayed up all night, and it was when he was most sleepy. Shangwen closed his eyes and said, "What's the matter?"

"What are these, why are they so strange? And this one you are sitting on, what is it?" Ying Yu asked continuously.

"The sofa, the rest are all furniture." Naofumi replied simply.

"Sofa. Sofa. What is a sofa?" Ying Yu asked.

"A high-end chair." Naofumi said impatiently.

"Chair?" Ying Yu asked

"See for yourself. I'm so sleepy." Naofumi said and turned around.

"Hey. Hey." Ying Yu shouted loudly.

"Hmph." Ying Yu turned around and snorted, then went to check it out by herself.

And what happened that night was far beyond Naofumi's imagination. The snow in the north had been falling all night. It started to snow a little bit in the morning, but it didn't stop. The snow accumulated overnight was very thick and as high as a person's legs.

Can't even move forward.

"Why is it snowing so hard?" Meng Tian began to inspect the camp early in the morning.

"General, many of the people who were out on guard duty froze to death," said a close guard.

"What?" Meng Tian asked in surprise.

"It's not good, General. It's not good, General." Tu Sui shouted loudly.

"What's wrong with General Tu?" Meng Tian immediately regained his composure and asked.

"I don't know what happened, but many soldiers died in the shacks," Tu Sui said.

"How many?" Meng Tian asked.

"There are already one or two hundred people." Tu Sui said heartbrokenly.

"What, why are there so many?" Meng Tian asked.

"Hey." Tu Sui still looked distressed. These musketeers are Tu Sui's treasures. These musketeers are well-trained and are the first musketry regiment in the Qin Kingdom. So many people have died without fighting. At present,

So far, one person has died here in a daze.

"What's the reason? Have you found out the situation?" Meng Tian asked.

Tu Sui shook his head.

"Let's go and have a look." Meng Tian said.

Shacks, the severe cold in the north came early and was extremely cold. The tents brought by the Qin army could not withstand it at all. Later, the Qin army learned how to make shacks after seeing the Huns and barbarians digging holes on the spot.

Unexpectedly, this shack was warmer than a tent, so this method quickly spread.

It was very cold yesterday and there was a shortage of charcoal in the north, but the Qin army discovered that the coal from the ironworks could be used for heating, so they used it. In the sealed shack, the Qin army specially made a hole in it for ventilation.

But it was windy yesterday. The wind was still very strong. The fast airflow prevented the airflow in the shack from flowing out, resulting in incomplete combustion of coal and the production of a large amount of carbon monoxide. The carbon monoxide could not be eliminated, causing the concentration to rise sharply. A large number of Qin soldiers were sleeping like this

died in.