Two days later, Hong Tao and dozens of children arrived in the stone courtyard, which was originally used as a dormitory for the new army in the coal mine, where the kang in the laboratory room had been dismantled and cleaned, and a test bench made of logs had been placed, and the experimental utensils were in place.

"The first step is called glycerol purification, and these by-products from lipid exchange contain alkali catalysts, soaps, a small amount of under-reflected oils and unevaporated methanol, as well as proteins, hydrocarbon compounds, pigments, precipitates and water, and how to remove as many of these impurities as possible is the purpose of purification. The first step is to use the characteristics of acid and alkali to neutralize the alkaline catalyst used to make soap, and both sulfuric acid and hydrochloric acid can be used. We use a liquid of sulfuric acid and glycerin diluted with water, can anyone tell me how to dilute the sulfuric acid correctly? ”

"Let the sulfuric acid slowly enter the water, not the water into the sulfuric acid!" Most of the children raised their hands and answered correctly.

Hong Tao did not directly start experimenting with the correct way to prepare nitroglycerin, but started with the raw materials and taught the children how to purify glycerin. These glycerins are a by-product of soap made in paraffin wax factories and cannot be used directly.

To put it simply, it is not difficult to prepare nitroglycerin in the laboratory, and it is even easier than preparing cotton wool, as long as there is sulfuric acid, nitric acid and relatively pure glycerol.

So why hasn't Hong Tao actually prepared this kind of good thing that can both save people and kill people? Even if it was in the Golden River Empire, it had never been touched.

There is only one reason, it is too dangerous, it is dangerous when it is prepared, and it is even more dangerous when it is stored. It can kill, but it can't control who it kills, which is a bit of a problem.

Hong Tao didn't plan to make it in large quantities, just limit it to the scale of the laboratory, even if he knew how to passivate, he wouldn't enter the production process for the time being. When the silver nitrate ignition device came out, let's talk about when.

Glycerol after acid treatment stratified with the highest glycerol content in the lower solution. The next step is degumming, using clay as a flocculant and decolorizing agent to adsorb and precipitate colloidal soap and pigment.

The best flocculant should be diatomaceous earth, but this thing doesn't seem to be available in the northwest region, so you have to ask the businessmen about it, don't think about it for the time being.

There is still about half of the glycerol solution left after the gum is removed, and it is not finished at this time. The first step is to neutralize the alkali with acid, and now the alkali has to be used to saponify and separate the fatty acids in the solution.

The most important thing about this step is that the lye concentration is low, and the fatty acids will follow the glycerol during distillation. When the concentration of lye is high, glycerol is easy to polymerize and thicken, which affects the next distillation effect.

What proportion of alkali concentration is appropriate must be slowly tested according to the concentration of acid neutralization in the first step, which is also affected by the quality of the glycerol solution itself. If you can't figure it out, you have to repeat the first and third steps several times, which is very troublesome.

In the end, the result is crude glycerin, which has to be distilled to remove water and precipitate salts, leaving less than one-fifth of the transparent oily liquid to be relatively pure glycerol, that is, glycerol.

"It's done, don't lick your fingers, you can't eat this thing! Wang Yi, you lead the team back to the city and make the notes. ”

Glycerol tastes a little sweet, and when the child hears that this thing is not poisonous, he starts to taste it instinctively, and then he can't stop. At this point in the experiment, the following steps are not suitable for children to participate in, and they will not be able to remember too much at one time.

"Yes! Listen to the orders of the squad leader and line up...... Look to the right...... "As soon as Chen Niang left, Zhao Maid became the oldest child in his class, and Hong Tao gave him the name of a class leader in order to encourage him.

Don't look at him, he is already the king of Yan'an County, and his title is second only to the king of one word, but he seems to attach more importance to the squad leader, an official who is not even a fart, and his mouth is full of how the squad leader is all day long, and he never mentions the title of this king again.

"Hey, hey, born to be the emperor's destiny......" Seeing the three teams of little ones walking away with neat steps under the leadership of Wang Yi, Gao Yu felt a little strange and a little yearning. He had never experienced this kind of collective life, but he thought it was quite interesting to hear Wang Wu and them say it.

"A natural official fan! Their identities were also told to you by Wang Shi? Hong Tao didn't know what the fate of the natural emperor was, but what Gao Yu said was definitely not right.

Many children like to be officials, and when they were in elementary school, Jin Yue was the class leader, and he also carried three bars on his arms. As long as she goes out, no matter what she does, the armband of the three bars must be hung up.

If you wear a skirt in summer without sleeves, pin it on your shoulders. Hong Tao felt that if she didn't dress Jin Yue, she would be able to put a pin into the flesh of her arm, and she would not give up this honor.

“…… Wang Shi said that the promotion society has been tested and is 100% loyal to adults...... "Whether it is 100% loyal to adults Gao Yu is really not sure, but he is sure that adults don't like this organization very much, and every time he says this name, he frowns."

"It's done, let's get down to business." Hong Tao did not explain this question, but took a small bottle of purified glycerin to the test bench on the other side.

I won't write the details about how nitroglycerin is prepared, this thing seems to be forbidden. In fact, I couldn't write it if I wanted to, and I tossed it for more than half a month, and used a lot of sulfuric acid, nitric acid, and glycerin, but I didn't get nitroglycerin out of the fart.

This is not the first time that Hong Tao has failed in his experiment, or that there have been far more failures than successes. His high school chemistry level can only reach this level, even if he is given a set of modern experimental equipment, it still can't improve the success rate much, and the foundation is too inferior.

"Let's seal this project for the time being, I can't tell what went wrong, and I'll slowly explore it when you have time."

But Gao Yu didn't think so, and was still stubbornly insisting. In the end, Hong Tao had to stop this insignificant move by order. It's not that he's reluctant to let him experiment, or it's an attitude against failure being the mother of success. It's just that there are more important things that need to be done now, such as fractionated coal tar.

Jinshan Coal Mine has been mined for almost a year, and the coke kiln has been officially released for a long time, but the only thing that has not been used is coal tar. Rather than laboriously transporting these liquids to Mawei City for disposal, it is better to solve them on the spot.

Time flies, and when I entered the laboratory, the ground was still bleak, and before I knew it, it was already a little green. The waterwheels used to draw water on the banks of the Shiyang River were also back in operation, and the water with ice ballast flowed down the ditch dug by the pioneers themselves to the land that had been frozen for the winter.

"Old man, have you cleaned up the land?" Leaving the hut where he always felt like it was going to explode, Hong Tao felt that his bones were rusty, stretched out his arms and legs, did not intend to ride a horse, handed over the reins to the wasp, and walked towards the river with his hands behind his back.

Boundary posts were also inserted here, apparently the land of the pioneers. Hong Tao didn't dare to go inside, turned around half a circle along the boundary post, and found a white-haired old man digging a trench with a hoe, intending to talk to him.

“…… Is the adult a Liangzhou duke? The old man only lifted half of his face, clamped it with one eye, and continued to work with his head down.

Hong Tao can really be regarded as in-depth and simple, and even if he goes out, he is wearing a new army uniform. The old Liangzhou people can recognize him, but the newcomer must not have seen him, and even if he does, he doesn't know who it is.

"That's right, the city lord sent me to ask if you still have any difficulties." Hong Tao is most satisfied with this state, and people who like to dig pits are unwilling to be known by too many people, which affects the professional and technical play.

"Difficult...... It's not that hard to do. Let's just talk about this land, a thick grass and mud on it, sprinkled with seeds, can grow, but unfortunately it is all deserted. I really don't know what the government thinks, why don't you call people early! ”

may think that Hong Tao is not a big official, or maybe this question is on the point, the old man finally stopped the hoe, and the pillar on his chin was about to chat.

"It's not possible to come early, this place was occupied by the Tanguts earlier, it's not just two years since I got it back, Lord Shuai Si is sure that the Tanguts won't come back before I dare to call everyone here."

If you want to talk about pretending to be your grandson Hong Tao is also the first in the Great Song Dynasty, he will come when he opens his mouth, and he will speak so smoothly that even the wasps have an illusion, thinking that Lord Shuai Si is really still in Liangzhou City, and he is just a small official who came out to observe the people's feelings.

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