The northern suburb of Meaux, about five kilometers away from Huaxia University of Technology.

Yan Zheng looked at the 20-ton lead chamber sulfuric acid plant that had been built in front of him, and almost burst into tears.

Despite its small size, its towers and pipes give it an industrial aesthetic that reminds him of the mid-19th century industrial area of Manchester.

However, this is definitely more advanced than the lead chamber sulfuric acid plant in Manchester in the early days, just because Yan Zheng is reluctant to give up these chemical talents!

The principle of producing sulfuric acid in the lead chamber method is not difficult, and if you insist on producing it, you can be sure that it can be produced a few years ago.

However, that kind of ultra-rudimentary soil method is extremely damaging to the human body.

The rabbit in the arsenal in northern Shaanxi uses the soil method to prepare sulfuric acid, and the principle is the same as the lead chamber method.

All the people who make sulfuric acid have even their teeth corroded out within two or three years, and basically after five or six years, their bodies are almost destroyed.

Yan Zheng may feel that human life is not worth anything in other places, anyway, he can let them work for twenty or thirty years, but in front of the sulfuric acid plant, he is a humanitarian after all.

He couldn't bear to see chemical talents destroyed, and he was even more afraid that they would have a fear of the chemical industry from now on, which would affect the successors to pass it on.

So he kept waiting, spending money, just to get these people to improve and get a safer sulfuric acid plant.

And his efforts have also been rewarded, the various towers of the sulfuric acid plant can make the chemical industry of Dongqin progress for 20 years!

Comprehensive towers, absorption towers, condensing towers, saturated hot water towers, desulfurization towers, these large and small towers, with lead pipelines or cast iron pipelines connected to them, can make the original reaction of sulfuric acid production in a more controllable range, and can also reduce volatile acid gases, harmful gases, and harm to employees.

In addition, Yan Zheng also made a simple gas mask, which is to use cotton and charcoal, add some fine sand, and make it look like a pig's nose.

Although it is a little difficult to breathe after wearing it, it can reduce the damage to the lungs.

"Your Majesty, everything is ready, you can light the fire!"

Huang Yuanquan, the general person in charge of the supervision and construction of the sulfuric acid plant, walked over wearing protective clothing.

Yan Zheng replied: "Hard work! ”

Under his guidance, Yan Zheng came to the reverberatory furnace and threw a burning torch into the furnace.

Because it was soaked in kerosene, it soon burned violently.

The employees present immediately closed the furnace door, and some people stood in front of the observation hole, watching the flames in the skull.

After a while, the employees of each key node were in the summons and opened the valves in turn.

Yan Zheng watched from afar, accompanied by students and tutors from various faculties.

The students of the Department of Chemistry all became apprentices and carried out this rare practice.

"The condensation tower is cooling normally! It's normal for the temperature to rise! ”

"Absorption tower absorbs normal ......"

"The hot water tower is normal, the temperature is constant ......"

"Scrubber normal ......"

With a normal shout, an hour later, the discharge pipe was opened, and the originally cold cast iron pipe had pale yellow smoke coming out.

After a while, the smoke cleared, and a thin thick liquid flowed out.

While flowing out, it is radiating heat.

The sulphuric acid is used in a large clay pot, and in order to ensure a tight seal, not only the lid is made of glass, but the crevices are also filled with cotton rope soaked in lacquer.

Lacquer is a natural corrosion-resistant material, which is enough to ensure that the concentrated sulfuric acid produced does not volatilize.

"Looks like it's done!" Yan Zheng said to Wang Erhu on the side.

Wang Erhu said seriously: "It looks like it, but I still have to test it to know, if the concentration can't reach more than 75%, then it has to be improved!" ”

Yan Zheng nodded, looked at Long Ping again and said, "As long as the sulfuric acid comes out, your medical team will soon have a new medicine!" ”

"What new medicine?"

"Sulfonamides! Benzene, a by-product of the coal chemical industry, is one of the raw materials of sulfonamides, and the coal chemical industry plus the sulfuric acid industry is enough to make sulfonamides! This stuff is comparable to antibiotics, and much better than allicin! ”

A smile bloomed on Long Ping's face, of course he didn't know what sulfonamide meant, but he knew what the concept of allicin was, if he could make something similar to allicin on a large scale, wouldn't it be able to save countless lives!

Yan Zheng said with a smile: "Not only that, but the textile industry, printing and dyeing industry, paper industry, military industry, chemical industry, and even all walks of life will usher in great development because of the mass production of sulfuric acid!" ”

………………

Five days later, the first batch of sulfuric acid passed the test, and the concentration reached more than 78 percent, which fully met the standard.

With concentrated sulfuric acid, the preparation of nitric acid is not a problem, and without Yan Zheng's instructions, the various tutors of the Department of Chemistry will take the students to start making their own.

The principle is also very simple, only need to use a simple distillation method, add saltpeter to the concentrated sulfuric acid, let it react slowly, and at the same time use water bath heating, as long as the temperature is controlled, you can use the volatile characteristics of nitric acid to prepare concentrated nitric acid.

The instructors of the Department of Chemistry also use saltpeter to dissolve and absorb heat to mix the condensed nitric acid.

The results are very gratifying, as long as the experimental procedures are followed, concentrated nitric acid can be produced.

The people in the Department of Chemistry were greatly encouraged and eager to try it, and immediately carried out the production test of mine mercury.

Previously, under the instruction of Yan Zheng, they conducted a test on the production of thundermercury, but the result was that the nitric acid did not meet the standard, and the production did not meet the standard.

After the concentrated nitric acid was obtained this time, the Department of Chemistry decided to set up four experimental groups to conduct control tests after a meeting.

Yang Ziwen and several classmates, under the leadership of Wang Erhu, carried out a trial production test of thundermercury.

The principle is also very simple, that is, mercury is dissolved in nitric acid, mixed with alcohol, and the product produced after the reaction.

Under Wang Erhu's instructions, Yang Ziwen, who was wearing protective clothing, first put a liter of pure mercury into the reaction vessel.

Han Qiu and Zhou Qinhui, just on the side, slowly poured concentrated nitric acid in, generally in a ratio of ten to one.

At room temperature, the dissolution of mercury in nitric acid is very low, so it must be heated to about 60 °C with a water bath, and stirred during the heating process.

Yang Ziwen only felt that the goggles were covered with a layer of fog, and mercury and nitric acid would volatilize in the process.

The mercury dissolved slowly, and it took about half an hour for the test team to get a jar of mercury nitrate solution, which was pale green.

Wang Erhu observed for a while, nodded and said, "Add alcohol!" ”

Several students immediately brought a high concentration of alcohol, which was in a ratio of one to one with mercury, and also needed to use a water bath to preheat it to about 50%.

The success or failure of this experiment lies in the control of the temperature, Yang Ziwen paid attention to the numbers on the thermometer, and once it reached the critical value, he quickly added some cold water.

The reaction of alcohol with mercury nitrate caused the solution to boil, and when white smoke appeared on the reaction dish, everyone breathed a sigh of relief.

This is a sign of the success of the response recorded in the Tufa booklet, and the last time it came out was red smoke, which frightened them to run away.

Wang Erhu didn't dare to take it lightly, and approached to check the condenser above the jar, which was used to collect the smoke.

After tossing back and forth for three or four hours, their protective clothing was already soaked with sweat.

Fortunately, the reaction has stopped, and there is a layer of gray granular material at the bottom of the reaction dish, which is wet thundermercury.

After natural drying, the entire experimental team began to perform the ignition test of lightning mercury with both eyes.

A small copper cap was filled with a small amount of thunder mercury, and as a hammer smashed down, a fire appeared visible to the naked eye, and a small pinch of black powder was ignited.

It's done! It's done!

The cheers immediately came one after another, and Yang Ziwen and his roommates were also ecstatic and hugged each other, they finally helped make something!

……

Two days later, all four experimental groups were declared successful.

They successfully produced qualified thundermercury, and their mastery of the thundermercury process has also reached a great level.

A fire cap only uses a few grams of mercury, and they can meet the existing needs by using the laboratory method!

This also announced that the chemical industry of the Eastern Qin Dynasty had caught up with the level of the middle of the nineteenth century.

It's a pity that this also declares that Yan Zheng can no longer pretend to be technical, and the little goods in his stomach have been squeezed dry.

If you want to establish the mass production of three acids and two alkalis in Dongqin, it is also a little impractical, if you want to produce caustic soda and hydrochloric acid on a large scale, you must establish an electrical industry, and you can't electrolyze salt water to produce caustic soda and hydrochloric acid, otherwise the cost is too high and the output is too low.

As for nitrocellulose, this thing is not introduced in the soil law booklet, even the atomic bomb is introduced, but nitrocellulose is not introduced.

The reason is that the production process of cotton wool can not be made in a simple environment, and the esterification reaction needs to control the composition of the nitrifier, the reaction temperature, and the reaction time.

Only in this way can the nitrogen content and viscosity of cotton be controlled, and the prepared cotton wool has high storage conditions.

In the absence of a strong chemical industry scale and foundation, the result of preparing cotton is likely to be a bang, taking away the hard-earned chemical talents from the first factory.

…………