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As soon as the flower head cabinet left, Wang Erniu came to check the output of potash fertilizer.

Before Wang Erniu left, the sun fell to urge the refining of nitrate.

Regarding the requirements for increasing production from all sides, Ha Laocai just said, "No!" ”

was so angry that he jumped to his feet and scolded, "Ha Laocai, I am hazy, how can I recommend you, an old money fan with a heart!" ”

Sun Yi understands the urgency of the collapse of the day, but he firmly supports Ha Laocai's one-sided approach.

The nitrate of the ironwood camp starts from filtering the nitrate, and the nitrate filtrate contains a large number of impurities, which must be removed step by step in order to obtain the high-purity nitrate specified by Sun Yi.

Take sodium, for example. Sodium is a very abundant element on the earth and is soluble in water, so rivers carry a lot of sodium. When the river flows into the sea, sodium accumulates in the sea, and when the concentration is large, the sea becomes salty. If the river does not flow into the sea, but evaporates halfway, such as the Langshan River loop in the upper reaches of the Yellow River and the Shandong region in the lower reaches of the Yellow River, sodium will gradually accumulate in the places where the river evaporates to form various sodium compounds.

This accumulation of sodium in the inland areas, if combined with the chlorine brought by the rivers, is salt; If it is combined with carbon dioxide to form carbonic acid formed by dissolving it in water, it is an alkali; If it is combined with organic matter to form nitrate ions, it is nitrate. Salt, alkali and nitrate are generally mixed to form, but the number of components is just a matter of quantity, so the three components in the nitrate filtrate are present.

Potassium and sodium are relatives, and where there is sodium, potassium is generally mixed. Similarly, potassium will also exist in the form of potassium salt, potassium alkali, and potassium nitrate, that is, potassium chloride, potassium carbonate, potassium nitrate, and the nitrate filtrate also contains these three components.

Similarly, calcium and magnesium can mix in and cause trouble.

The so-called nitrate boiling is to extract the required sodium nitrate components from these mixtures, and its principle is still to use the different solubility of various substances in different environments in water.

However, the saturated solution of nitrate is too viscous and makes processing difficult.

The temperature is 0 degrees, 100 kilograms of water can dissolve 73 kilograms of nitrate, the temperature is 35 degrees, 100 kilograms can dissolve 100 kilograms of nitrate, the temperature is 100 degrees, 100 kilograms of water can dissolve 180 kilograms of nitrate.

At 35 degrees Celsius, the weight of dissolved nitrate is already the same as that of water! I really don't know who dissolved whom. You can say that the hydration of nitrate, or that nitrate absorbs water, which is really worthy of the name of "when it encounters water".

In fact, the nitrate filtrate in the pot has become a sticky paste when it is far from reaching the saturation concentration, and it can be hung out with a willow branch, and a few drops on the stove will condense into a white solid stain.

Under this viscosity, not only the crude nitrate obtained by the first crystallization contains a lot of organic impurities and inorganic impurities, but also the remaining nitrate water of the crude nitrate crystallization is still rich in a large amount of nitrate.

After all, there are a number of nitrate resources in the Ironwood Camp, so Sun Yi pursued the total output of nitrate under limited resources while ensuring the purity of fire and nitrate. This requires Sun Yi to design different recrystallization processes according to the nature of different impurities, and gradually improve the purity of nitrate without causing waste. As Ha Laocai said, "although the concoction is complicated, I dare not save labor."

explained the truth to the sunset, and the sunset had no choice but to face the reality.