Air flow can speed up the evaporation of liquids, and high temperatures can also speed up the evaporation of liquids. Based on this knowledge, there is a way to speed up evaporation - you can use a hair dryer to blow on the surface of the solution.

There is no hair dryer. There is a bellows in the blacksmith camp. A basin of fire is placed in front of the bellows, and the solution is placed behind the brazier. The bellows blows, blowing hot air through the solution. Soon, a jar of solution is dried.

Li Mengxi immediately called the blacksmith over, and asked the blacksmith to bring a bellows and a charcoal basin. Then, in front of everyone's surprised eyes, Li Mengxi began to demonstrate the hot blowing technique.

The principle is very simple. It's just blowing hot air onto the water. It's that simple. It's such a simple method that can quickly evaporate liquid under low temperature conditions.

At this point, the hot air came, but Li Mengxi discovered the problem again. The problem was on the charcoal fire. The bellows was blowing there, blowing the charcoal ash into the solution.

Although a little carbon ash does not affect the taking of the drug and is not a big problem, it does not affect the taking of the drug, but it will affect the purification of the drug and affect further subsequent research.

Therefore, carbon fire is not perfect.

Li Mengxi once again thought of the hair dryer. The hair dryer relies on electricity to heat the wire mesh, and then passes the air. The cold air passes through the heated wire mesh. Once it passes, the air becomes hot air.

According to this principle, you don't need a charcoal basin. You can weave a wire mesh with thin wire. Then, heat the wire and blow the bellows against the wire mesh. In this way, there will be no interference from charcoal dust.

Perfect.

Li Mengxi immediately gave another order to the blacksmith camp. He asked the blacksmiths to make a fishing net made of twisted iron wires. The mesh should not be larger than the size of a mung bean. The net does not need to be big, a palm-sized one is enough. When the net is ready, it needs to have a long handle.

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In order to extract the medicinal materials, they have to be boiled at low temperature. After the low-temperature boiling is not enough, they have to find ways to evaporate quickly. In order to evaporate quickly, hot air evaporation technology must be used. The hot air evaporation technology using bellows and charcoal basins is not good enough.

Weaving barbed wire and preparing to create a beggar's version of hot air.

It’s like this every time, every time the goal is just a technology, but in the process it turns out that a bunch of technical support is needed.

Li Mengxi stayed up until late at night. He saw that there were several jars of solution in just one bellows. Even if a bellows was added, the evaporation effect was still very low because the container was a pottery jar and it was difficult for wind to enter the jar. It seemed that

The evaporating dish also needs to be modified.

It was too late at night, and Li Mengxi, who was extremely sleepy, had no choice but to order the soldiers to continue working at night, and emphatically explained that only small fires should be used, not large fires, and they had to burn for a while and stop for a while, until a jar of water was boiled down until there was not much left.

, you can stop and leave it.

Afraid that the soldiers would not follow instructions, or that someone would ruin the entire test by being careless, before going back to sleep, Li Mengxi asked Liu Bei to help keep an eye on it, and Liu Bei was happy to help.

Another day, at dawn, Li Mengxi went to the city lord's palace early to check the results. After a night of boiling, half of the solution in most of the jars was gone - except for the jar of grease.

Li Mengxi saw that a vat of butter was still a vat of butter. After cooking it all night, there was no shortage of it.

At this time, Li Mengxi suddenly realized a problem. Among many liquids, some are easy to evaporate, but some, such as grease, are extremely difficult to evaporate.

However, if the medicine has been dissolved in the oil, then with such a large jar of oil, should the patient drink the whole jar of oil? It would be better to eat raw willow bark when drinking the oil.

Another problem stands in front of us. Suppose there is a substance that is easily soluble in grease. Then, after dissolving this substance in grease, how to separate it from the grease? The evaporation technology will definitely not work. Oil is extremely difficult to evaporate, and the boiling point of grease is still high.

High, the fat is heated to boiling. Under the boiling oil, everything will be fried, and no medicine will be left.

Another problem that has to be overcome in extraction technology has emerged: how to separate and remove grease.

Li Mengxi thought of ways to remove oil. The only way he could think of was saponification, which is to add some alkali, plant ash or lime water to the oil to turn the oil into soap. If the oil becomes soap, then the medicinal substances will remain.

Already.

But the unknowns are, first, whether the drug will react with alkaline, and second, whether the oil is easy to separate after saponification. If the saponified oil is still difficult to separate from other substances, then this method is useless.
Chapter completed!