Zhang Guoan took a serious look at the list and felt that the deal was fair. Pen, fun, and www.biquge.info

He didn't take advantage of Da Song, and Da Song didn't take advantage of him.

The captain still bought cotton from different places according to his requirements, which made Zhang Guoan the most satisfied.

He is about to start the most important item now, he must process the cotton wool, without it, everything is in vain, his force value will be the same as that of the Great Song, he doesn't like it.

Zhang Guoan brought some high-yield conventional cotton seeds, according to the person who sold the seeds, it can yield 1,000 catties per mu, and it is also high-nitrogen cotton.

After they sowed it in the spring, they observed that this cotton seed emerged quickly, the growth was strong in the middle stage, the growth was stable in the later stage, it did not senesce prematurely, the plant height was about 1 meter, the leaves were medium in size, dark green, and there were 30-50 bolls per plant. Shang can also be regarded as having a conscience.

After the cotton is removed and dried, it is now also being produced, and if you want to have it on a large scale, you can only wait for the second sowing.

He had him build a wooden house in the woods in the upper reaches of the Badao River, and spread half a foot of river sand on the ground.

There are also a number of wooden shelves in the house.

All kinds of porcelain vases and clay vases, as well as stone mortars, wooden mortars and other things, this is his workshop.

Previously, he had torn apart cotton from different origins, picked out visible impurities, and washed the cotton with water until the effluent was clear.

Then put the cotton in a casserole, add water until it is just enough to be submerged, then add a sodium hydroxide solution equivalent to 2% to 5% of the weight of the water in the pot, cover and bring to a boil, then simmer for 10 minutes.

Finally, after cooling, rinse with plenty of water, about 10 minutes while washing, and then place the washed cotton on a clean bamboo mat to dry.

Zhang Guoan found in the processing that the cotton sold by Da Song was still with seeds!

This caused him to have to have an extra process in advance, hand ginning.

For this reason, he also asked people to inquire among the soldiers whether the cotton farmers of the Great Song Dynasty would gin. Later, I found out that this was the ginning of the cotton weaving workshop itself, and the Great Song Dynasty had a two-person hand-cranked ginning machine.

Zhang Guoan broke off the idea of selling ginning machines.

After he finished the cotton degreasing from each production area, he tried it, pulled a small ball of absorbent cotton, and put it in the water. The cotton ball can quickly suck in water and sink into the water, while the normal cotton ball is still floating for a long time.

Zhang Guoan carefully and very slowly added concentrated nitric acid and concentrated sulfuric acid to the porcelain bowl, and their ratio was one to two.

He noticed the sequence, which was to pour sulfuric acid into nitric acid to prevent spilling, mix it and stir it gently with a small porcelain plate, and then buckle a porcelain bowl and cool it in cold water to room temperature for later use.

Then the absorbent cotton from different origins was immersed in the mixed acid, and at the same time, the air bubbles in the absorbent cotton were squeezed out very slowly with a porcelain plate, and he took care to gently press the nitrated absorbent cotton under the surface of the acid. Then after waiting for about 20 minutes, slowly take out the nitrocellulose with two small porcelain plates, and throw it directly into the wooden barrel to rinse until it no longer smells sour.

Then put the washed nitrocellulose into the dilute sodium carbonate solution and boil for half a minute to keep the solution alkaline.

Remove and wash until neutral or slightly alkaline.

After drying, it is then immersed in 2% nitric acid/potassium aqueous solution, and then taken out and then dried.

In this way, he was busy almost all day by himself.

Fortunately, there are not too many cotton sources.

He took a sample of about one gram each------ which could propel a bullet if it was really a suitable cotton wool.

The explosive power of nitrocellulose is 2 to 3 times greater than that of black fire?/medicine!

He was on a freshly cut pine plank. Light them one by one and observe the burn marks after they burn on the pine planks. And with a gram of black fire? Drugs refer to them.

It turned out that, judging from the burn marks, he excluded four origins at that time, leaving only two copies.

Because he observed that the cotton from the four origins was only more than his purified black fire? The medicine is a little better, and this can only be the material for making paint and celluloid.

At last. Or the cotton brought by himself has the best effect, the other two copies are okay, and the next time you can buy a large number of them, those two copies are in Fujian, it seems necessary to buy some.

He defined these three types of cotton as No. 1 to No. 3 nitrocellulose.

He sighed. It's a lot of work.

There were still staple fibers left on the cottonseed after he had gowned by hand, and he had to use a stripper to peel off these staple fibers, but he could only tear them little by little by hand.

This kind of cotton is called cotton linters.

Cotton linters are made up of three parts; The first part is the longer fibers; The second part comes from the fibers on the cottonseed that have been torn by hand; The third part is a layer of short and dense fibers that naturally grow and develop on the cottonseed skin, which is the main component of cotton linters.

The first type of cotton linters, because of the longer length, and the maturity is not as good as the second and third types of cotton linters, therefore, it is generally used as textile raw materials, wadding, medicinal cotton, and raw materials for the manufacture of high-grade paper.

The second and third types of cotton linters, although short in length, have a high degree of maturity, so they are the main products for the manufacture of cotton wool.

Therefore, if you calculate carefully, every pound of cotton suitable for processing into nitrocellulose can only use about 25%.

After Zhang Guoan stretched his waist, he got this nitrocellulose today.

It was time for him to go home, it was past five o'clock.

He tied the door with a rope and will be back tomorrow.

As mentioned above, this nitrocellulose cannot be used as a propellant/charge directly, the burning rate is too fast, and it is likely that the lead bullet will explode itself before it flies out.

So he also needs to reduce its combustion rate.

More than 90% concentrated nitric acid is easy to do, he uses nitric acid/potassium plus concentrated sulfuric acid to react, then collects gas, and then condenses, and then dehydrates with sulfuric acid a little bit, distills a little bit, and accumulates it little by little.

However, he couldn't save like this in the future, so he was ready to use the semi-laboratory and semi-handicraft method to process, and he tried to design a set of ceramic condensing equipment to increase the output of nitric acid.

Alcohol ether liquids mixed with ethyl/alcohol and ethyl fans are also easy to do.

Ethyl/alcohol is alcohol, and it goes without saying.

B fan is the gas produced when ethylene/alcohol and concentrated sulfuric acid are heated to about 130 degrees after rapid reaction, and after collection, the liquid produced by condensation.

The volatility of B fan is too strong, so he plans to use it after he is ready-made tomorrow.

By the time he returned to the mouth of the Badaohe River along the river, it was about to get dark soon.

Only then did he realize that the dock and the big stockade, as well as the castle, should be brightened, and if it weren't for the moonlight, it would be too dark everywhere.

They are not short of whale oil at all now, and hanging a little more gas dead wind lamps also adds to the popularity here.

When he returned home, he warmed his meal on a charcoal stove and stewed venison with potatoes.

Zhang Guoan ate sweetly, he didn't expect potatoes to be so delicious!

After Zhang Guoan ate a few bites in a row, he said loudly that it was delicious.

Quietly smiled as he finished eating.

After eating, he remembered that it was still a seed.

Quietly shook her head with a smile and said, "The rest is enough, you just have to eat well." ”

The processing of ethyl/alcohol was all handled by Quiet, and she was not willing to use grain, but wild fruits. (To be continued.) )