Chapter 257: poisoned by carbon monoxide

Sodium carbonate, commonly known as soda, soda ash, washing soda, chemical formula: Na?CO?, under normal circumstances, it is a white powder and a strong electrolyte. It has a density of 2.532g/cm3 and a melting point of 851°C. It is easily soluble in water and has the properties of salt.

Sodium carbonate that exists in nature (such as saltwater lakes) is called trona. This is currently the main source of Qin Guo's sodium carbonate. But the output is very limited. This is also one of the reasons why the glass, textile, chemical and other related industries cannot develop rapidly.

It can be said that the development of sodium carbonate is now restricting the development of Qin State Chemical.

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

The Lubrunn method was first used in 1791 to produce sodium carbonate using salt, sulfuric acid, coal, and limestone as raw materials. It was the Lubrunn method. This method uses insufficient raw materials, poor working conditions, and poor product quality, and is gradually replaced by Solvay.

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, and heat it to decompose it into sodium carbonate. People call this method Soxhlet's alkali production method, this method has been used to this day.

Hou Debang Fa The Chinese Hou Debang returned from studying abroad in 1943. He improved the Solvay process based on the salt shortage in the Chinese mainland. He combined the two major industries of soda ash and synthetic ammonia to produce sodium carbonate and fertilizer ammonium chloride at the same time, greatly improving The utilization rate of table salt is Hou's alkali production method.

Only the latter two can be used in the four methods. Solviha and Hou De Bangfa. But two require another chemical, ammonia.

Camel dung is a commonly used fuel in the desert, and even the sacred Zeus had to condescend. Due to the long-term burning of camel dung, the walls and ceiling of the Zeus-Amo Temple were covered with soot. This soot contains some white crystals like salt, which emits pungent odors from time to time. The locals call this white crystal salammonic (salt of the **** Amo). In 1774, the British chemist Priestley collected this pungent odor gas separately and studied it. He found that the gas was soluble in water and showed alkalinity, so he called it "Alkaline gas". However, this term was not accepted by the chemical world. In the end, people still gave it the name "am-monia" from the source of this gas, "Am-monia". This is what we call "ammonia" today.

If Shangwen wants to prepare ammonia water, he can only prepare it by heating this crystal and calcium hydroxide. Think of an unpleasant smell. Shangwen's stomach felt unappetizing. But still have to do it. But before I have to do a "gas mask."

And this kind of crystals can only be collected from feces. It is estimated that some people still don't know. Saltpeter is not a big deal in the East, but it is quite frequent in Europe. These are the reasons for the development of chemistry in Europe, but after they discovered the power of the musket, they developed rapidly. But saltpeter is in short supply. It was later discovered that human body and animal excrement contained nitrate, so a large amount of it was collected. Even strictly control human excrement. This can be regarded as a contribution to chemistry.

Human wisdom always finds another way to obtain it quickly after a kind of item is lacking.

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

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

Yingyu slept very comfortably, sleeping until the sun rose high.

Yingyu stretched out a lazy waist, feeling that she had never slept in such a comfortable bed before, and that she had come here by herself.

Yingyu walked out of the outhouse and found that there were a few strange things in the room suddenly.

"Hey, hey." Yingyu woke up Shangwen with curiosity.

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

"What's all this, why is it so strange. And this one you are sitting on, what is this?" Yingyu asked again and again.

"The sofa and the rest are all furniture." Shang Wen replied simply.

"Sofa. Sofa. What is a sofa?" Yingyu asked.

"A high-end chair." Shang Wen said impatiently.

"Chair?" Yingyu asked

"Watch it for yourself. I'm sleepy." Shang Wen said and turned around.

"Hey. Hey." Yingyu shouted loudly.

"Humph." Yingyu turned around and snorted. So I just checked it out myself.

And this night, what happened far exceeded Shang Wen's imagination. The snow in the north has fallen all night. The snow only gets smaller in the morning. But it didn't stop. The snow accumulated overnight was very thick and very high. People can't move their legs.

"Why is this snow so heavy?" Meng Tian began to inspect the camp early in the morning.

"General, many people who went out to stand guard have frozen to death." A close guard said.

"What?" Meng Tian asked in surprise.

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

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

"I don't know what's going on, many soldiers died in their shack," 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 were well-trained and were the first musketeer regiment in the Great Qin Kingdom. So many died now without fighting. So far, there is even a confused death here.

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

Tu Sui shook his head.

"Go, go and see." Meng Tian said.

The shack, the northern cold comes early. And it's unusually cold. The tent that Qin Jun brought was simply unable to resist. Later Qin Jun saw the Huns and Hu people dig pits on the spot, and then made shack. Then I learned. did not expect. This shack is warmer than a tent, so this method quickly spread.

It was cold yesterday and there was a lack of charcoal in the north, but Qin Jun found that the coal from the iron factory could be used for heating, so he used it. In the sealed shack, Qin Jun specially made a hole in it in order to ventilate.

But it was windy yesterday. The wind is still very strong. The fast airflow prevents the airflow in the shack from flowing out, resulting in insufficient coal combustion, producing a large amount of carbon monoxide, which cannot be eliminated, causing the concentration to rise sharply. A large number of soldiers of the Qin Army died in this coma.