Study hard and thrive until you stand on the world stage.
In Yu Hua, Hua Luogeng saw the shadow of too many people. These people were not ordinary people, but top geniuses in the history of human civilization.
The mathematical talent of Ramanujan from India, the intelligence of Newton, the eyes of Galileo, the ambition and perseverance of classmate Xiangyu, the shadows of too many people overlap in Yu Hua.
Hua Luogeng knew and supported Yu Hua's ambition.
The pond of China is too small and only the world can accommodate it. The most important thing is that today's China cannot provide a stable growth environment and nutrients for the seedling of Yuhua.
"Student, thank you for your teaching." After hearing this, Yu Hua bowed and saluted, and said solemnly.
Hua Luogeng smiled: "Go to bed. Tomorrow we will continue to study "Theory of Real Variable Functions", complete it as soon as possible and enter the "Mathematical Analysis" course. Remember, learning is like sailing against the current. If you don't advance, you will retreat."
"Students understand." Yu Hua nodded and responded seriously.
Hua Luogeng, who was about to go home, suddenly remembered something and reminded: "By the way, the Journal of Tsinghua University will be published on April 10, so pay attention then."
Yu Hua nodded, noted the time in his mind, then turned around and left, returning to the second bedroom to rest.
Late at night.
Dawn is approaching, a feeling of spring is dormant in the dark night, and the sky will soon be filled with green.
…
Saying goodbye to the work of deciphering the red secret, Yu Hua returned to normal study. On Saturdays and weekends, he followed Hua Luogeng to learn the theory of real variable functions and continuously improved his mathematics level.
With the completion of the last class of the weekend, the theory of real variable functions no longer has any obstacles for Yu Hua.
After learning the theory of real variable functions, the thinking finite element analysis system that Yu Hua has been constructing has been improved to about 70% of the progress, and the remaining 30% is only missing the gap of mathematical analysis.
Once the last vacancy is filled, Yu Hua will be able to establish his own finite element analysis system, greatly improving his engineering analysis and scientific research capabilities.
This is a dragon-slaying knife.
However, the process of casting the dragon-slaying knife is still long, and Yu Hua has another thing to complete.
Xicheng District, formerly a temporary workshop, is now a small chemical laboratory.
"Sir, the laboratory has been built. The instruments and materials are all here. However, the quantity of alcohol ether solvents and diphenylamine is small and difficult to purchase. The cost is 1,250 yuan." Xu Rui opened the door of the small chemical laboratory.
, reported the situation to Yu Hua Zhengsheng.
Yu Hua nodded, walked into the laboratory, and looked around.
The entire laboratory has complete water and electricity, and the interior is simple. There is a wooden operating table in the middle, with a series of chemical instruments and materials on both sides. Not far away is the stove. These instruments and materials are all included in the material list. The overall level is about
The level of the chemistry laboratory of a junior middle school in China in later generations basically met the requirements.
After a week of construction, the entire small chemistry laboratory has been completed. It has a series of basic chemical instruments, such as a pallet balance, an alcohol blowtorch, etc., and all the materials used to prepare the three types of gunpowder.
As for the cost, the total cost of materials, reagents and various instruments is about 1,200 oceans. Since most chemical instruments cannot be produced domestically, these instruments are basically imported.
Importing means expensive.
After observing the entire laboratory, Yu Hua nodded affirmatively, turned to Xu Rui and said, "Very good, thank you for your hard work, Ruizi."
It has to be said that the task was completed within a week, and Xu Rui was indispensable. You must know that these instruments need to be purchased from different places, which is time-consuming and labor-intensive. Finally, the laboratory must be arranged.
The whole process is extremely complicated.
"It's not hard, Rui Zi." Xu Rui quickly shook his head.
"Ruizi, boil the water in a pot and put the lard into the pot and boil it." Yu Hua smiled and arranged for Xu Rui without worrying too much.
Boil water in a pot and boil the lard. This is the oldest and most effective method of refining glycerin - the boiling method.
The principle of the cooking method comes from the saponification reaction of high school chemistry. Oil is easily hydrolyzed when exposed to acid. As long as natural animal and vegetable oils and caustic soda are available, it can be extracted and produced.
Glycerol, this is the first and most important step in developing single-base propellant.
After the outbreak of World War I, glycerin, which can be used to make explosives, was immediately listed as one of the strategic materials by various countries and was strictly controlled, including China.
High-purity glycerol cannot be purchased on the market, but you can purchase lard, chicken fat, vegetable oil and other types of oils, um, including the gutter oil flowing in Beiping City, etc., for your own production.
Of course, it would be more troublesome if the police discovered it.
Fortunately, those who don't know the goods can get away with it. If they know the goods and recognize that you specialize in making glycerin, if nothing else, they will go to jail for ten and a half days.
Preparing glycerol and even single-base propellant in Xicheng District, the most prosperous area of Beiping City, only Yu Hua with a big heart can do it.
Xu Rui followed the arrangement, turned to the stove, added water to the fire, and after the water boiled, put in various fat blocks and lard weighing about 20 kilograms, and cooked over high heat.
When the pot is steaming and the water has boiled, Yu Hua, standing next to the stove, adds sodium hydroxide in a rough proportion, closes the lid to seal, and cooks together.
In the large pot, sodium hydroxide and fat are heated to produce a saponification reaction, which is hydrolyzed into sodium and glycerol, higher fatty acids. The entire process continues. The water vapor with a temperature of about 200 degrees Celsius makes the entire chemical reaction more intense. Yu Hua occasionally opens the metal pot.
Cover and stir the fat mass with a wooden stick.
In addition, Yu Hua, who was staying by the cauldron, held a notebook and pen in his right hand, recording the cooking steps and process in detail. This notebook will be a precious gift from his 'Zhang San' to Eight Roads.
Time passed slowly. After a few hours, the fat lumps in the pot disappeared. After cooling, only a thick layer of sodium higher fatty acid and glycerin water remained on the surface. The glycerin content was about 20%, and the water contained various impurities.
and a mixture of sodium hydroxide aqueous solution.
The boiling process is over. Next, Yu Hua needs to convert the glycerin water into crude glycerin. After obtaining the crude glycerin, he will then proceed to distillation, decolorization and deodorization to finally obtain high-purity refined glycerol.
It was getting late, so without wasting time, Yu Hua and Xu Rui scooped up all the soap on the surface of the cauldron. After the soap was removed, Yu Hua processed the glycerin water containing 20% glycerin accordingly.
About an hour later, Yu Hua obtained the crude glycerol that had been decolorized and deodorized, and the impurities were basically treated. It was then poured into the distiller for distillation and dehydration.
Not long after, the high-purity glycerol was produced.
"Huh... it's finally over. Now that you have glycerin, add sulfuric acid and nitric acid for treatment to make nitroglycerin." Yu Hua breathed a sigh of relief as he looked at the high-purity glycerin stored in the large-dose beaker.