When Xiao Yao made phenol, the most critical white crystal, it meant that he wanted to make yellow explosives, which could be said to be half the success!

Then after adding concentrated sulfuric acid to phenol, it is heated to 100 degrees to allow a thermal reaction to sulfonate phenol! However, the temperature must be controlled in this process, but fortunately, Xiao Yao has made a thermometer when he fired the glass before, so that the temperature of the reaction can be more effectively controlled in the production process, making the production process safer!

After the phenol is sulfonated, concentrated nitric acid is added to nitrate itrification, so that a trinitrophenol solution can be obtained, that is, picric acid with a strong bitter taste, commonly known as yellow explosives!

Finally, the trinitrophenol solution is dissolved in boiling water, and then recrystallized and dried, so that the finished product of yellow explosives can be made!

However, the most important thing is that after Xiao Yao successfully uses this experimental method to make these yellow explosives, he must also transform this laboratory production method into a factory model that can be mass-produced!

Because the amount of material used in the production method is very small, many dangerous steps can be ignored, but when it is produced in large quantities, it is necessary to solve various problems!

Although this chemical reaction is very simple in the laboratory, it is very complex and dangerous in the process of mass production: the temperature is too low for several substances to react; If the temperature is too high, it will explode!

And yellow explosives are poisonous, so in the production process, we should also pay attention to avoid direct physical contact with these toxic substances, in addition to making everyone must wear gloves, strictly abide by the various rules and regulations formulated by Xiao Yao, production steps, Xiao Yao also used bamboo tubes and hard paper, added charcoal powder, lime powder and sawdust and hemp wool to press, and then sewed up strips of cloth to make a simple gas mask, forcing those craftsmen who assist themselves to bring these strange and even ugly looks, And it also affects what you breathe!

So, Xiao Yao stayed in the laboratory and the iron workshop for almost a month, with the assistance of those experienced craftsmen and a large number of laborers, and then experienced countless failures and several almost lost his life, consumed a lot of various raw materials, and finally made hundreds of catties of yellow explosives!

It took a month to make such a few yellow explosives, which shows that the output of this production mode is still very low, but it is already the limit of Xiao Yao's production under such extreme conditions, so in order to maximize the amazing power of these yellow explosives, Xiao Yao decided to use good steel on the blade and use these yellow explosives to make more lethal shells!

It is to load the yellow explosive into the hollow shell, and then insert a wooden pipe fuse, when the ignition is fired, the propellant in the barrel burns rapidly, and then the shell can be ignited at the same time, after adjusting the length of the wooden pipe fuse, so after the shell is launched, while hitting the target, the wooden pipe fuse has also been burned, and the yellow explosive in the shell can be detonated, so that it becomes a grenade that can explode after the artillery is fired, and the shell hits the target, which is commonly known as the flowering bomb!

Before Xiao Yao's sub-mother cannons all used solid iron balls as cannonballs, and their attack principle was to use the huge kinetic energy that the cannonball had after launching, just like a bowling ball hitting the target to attack the enemy, so the killing range of this cannonball is a straight line, if it encounters the enemy in a dense position, it is okay, if the enemy disperses, then the killing range of this cannonball is greatly reduced! Yunnan

Although this solid shell had such obvious drawbacks, because at that time this firearm had no opponent at all, even a solid shell could easily defeat the opponent!

Another reason is that at that time, Xiao Yao only made black powder, because the power of black powder is average, so if you install more black powder in order to increase the lethality of the shell explosion, you must make the shell case thinner, so that the charge space in the shell is larger, but this may lead to these shells because the shell is too thin to withstand the high chamber pressure in the barrel when fired, and as a result, the shells are not fired, and they are crushed by the extremely high chamber pressure of the artillery, resulting in an explosion accident!

However, if the shell is made too thick in order to make the shell withstand the barrel pressure, although this can ensure that the shell can withstand the high chamber pressure when fired, but this will greatly reduce the black powder installed in the shell, and the power of the explosion after hitting the target will be greatly reduced, and even the shell cannot be blown up, producing fragments to kill the target, which is equivalent to a solid shell!

So at that time, Xiao Yao didn't make these grenades that could explode after being launched.

However, because Gao Changgong now also has artillery in his hands, and he still has an advantage over Xiao Yao in terms of numbers, Xiao Yao must use more powerful grenades to have a chance to defeat Gao Changgong!

And there is no special barrel to fire this kind of grenade, as long as an ordinary barrel is cast, it can be fired, so Xiao Yao doesn't need to let Zhou Chao cast a new type of artillery, just cast an ordinary sub-cannon according to the same process as before!

Although Gao Changgong also has artillery in his hands now, this kind of grenade that will explode after hitting the target, there is no need to worry that Gao Changgong will copy it from the past!

The reason is that in addition to the yellow explosive, which is a complex second-generation gunpowder, Gao Changgong is impossible to develop as easily as black powder, and when using this kind of grenade, it is necessary to install a wooden tray under the shell, and then when loading the barrel, this wooden tray can play a sealing role, increasing the air tightness of the artillery, so that the shell can be fired farther!

So when using grenades, these small details that need to be paid attention to, even if Gao Changgong has the help of Zhang Dabao, a traitor, Xiao Yao is sure that they will not be able to think of it!

So now, after Xiao Yao successfully made the yellow explosives, he immediately loaded them into the shells that had been cast with molten iron in advance, and then sealed the shell mouth with paraffin, and when it was time to use it, he inserted the adjusted wooden tube fuse according to the distance of the shot, so that it could be directly loaded and fired!

Now looking at the two hundred or so grenades that have been loaded with yellow explosives and sealed with paraffin, large and round finished products, Xiao Yao suddenly has a trace of anticipation in his heart, looking forward to using these grenades to take revenge on Gao Changgong!

"Gao Changgong, you defeated the attack of 50,000 Chen troops in one fell swoop, and won the victory in the Battle of Xuzhou, now is the peak moment of your life, let you be stunned for a few more months, and then I will let you taste the taste of defeat and avenge my dead forward brigade brothers!" Xiao Yao said fiercely.