pyridine anhydrous

In "Tiangong Kaiwu", the main use of the anhydrous material is mostly related to people's livelihood.
The first is metallurgical melting aid. In the case of casting and smelting, this material is often used as a flux. Taking metallurgical iron as an example, it can be combined with gangue contained in iron ore to reduce the melting point of slag and make it easier to separate from molten iron. This can improve the purity and quality of iron, so that the cast iron has better performance. It is crucial for casting agricultural tools, weapons, etc. Good agricultural tools are conducive to farming, and sharp weapons are used to protect the family.
Used for pottery. In the pottery process, adding an appropriate amount of anhydrous material can change the chemical composition and physical properties of clay. The ceramic billet is easier to sinter during the firing process, improving the hardness, density and fire resistance of the pottery. It can fire pottery with a denser texture and a more beautiful appearance, whether it is daily pottery, such as dishes and pots, for the needs of the people to eat and live; or construction pottery, such as pottery tiles, can make the house more durable and resist wind and rain erosion.
Furthermore, it is used for papermaking. In papermaking, anhydrous substances participate in the process of processing fiber raw materials. It can accelerate the dissociation and dispersion of fibers, so that the fiber distribution is more uniform, and the paper produced is uniform in texture and good in strength. And it helps to remove impurities contained in fibers, improve the whiteness and cleanliness of paper, and lay a material foundation for cultural inheritance and dissemination. Whether it is writing scriptures and classics, or daily letter records, all rely on high-quality paper.
Reused for printing and dyeing. In the printing and dyeing industry, anhydrous materials can be used as mordants. It can make the dye more firmly combined with fabric fibers, improve the dyeing fastness, and make the color of printing and dyeing last for a long time. Whether it is the color dyeing of people's daily clothes, making them colorful; or the printing and dyeing of exquisite silk fabrics, used for the clothing of dignitaries or ceremonial items, all add color because of the lack of water, satisfying the pursuit of beautiful clothing by different classes.

If something is pure, it has no miscellaneous water state, and its purity standard is also determined by the ancient craftsmen. In the past, hundreds of workmanship tools, those who are pure in things, seek to be refined to pure, with less miscellaneous impurities, especially those who avoid water.
If you want to set the purity standard of something without fruit, the first texture is the first. The texture is pure, the touch is warm and solid, and there is no sense of wetness at all. Such as the genus of gold stone, it is pure in a state that is firm and brittle without softness. If it feels smooth like water to the touch, or you see tiny droplets attached, it is not pure.
Second view of color. Solid color, its color is uniform and bright, without variegated mottles. If there is a hazy color, like water vapor, then there is a loss of purity.
Furthermore, test it with fire. When a pure person encounters fire, there is no sound of sizzling water vapor, and there is no appearance of water mist rising. If an object encounters fire, it smells of light smoke and water, or if there is water vapor evaporation hidden in the fire, it must contain moisture, and it is not pure and fruity.
Observe its sound again. Strike with objects, and the sound of a pure person is clear and clear, without dullness and astringency. If the sound seems to be wet, like hitting a damp cloth, it is not pure.
The ancient craftsmen used their own experience and skills to integrate texture, color, fire test, and sound to determine the purity of fruit-free things. Although there is no accurate measurement today, the precision of their care, skill, and rules can also be used as a lesson for the future.

If you want to know the storage conditions of anhydrous soil, you can see the description in "Tiangong Kaiwu". The storage of all things varies according to the nature of the things.
If grain is stored, it must be dried in the warehouse. Those who cover grain contain water and are prone to mildew and rot, so they can be put into the warehouse until they are dry and clean. The location of the warehouse should be open and ventilated to avoid water and moisture. In the warehouse, it is often necessary to lay ash and moisture, so that the grain can be stored for a long time without damage.
Vegetables and fruits, etc., are delicate in nature. For the storage of fruits, those who are stored with sand should choose clean sand, spread it on the ground, and place the fruit in it. Thick sand covers it, which can slow down its decay. If it is a citrus, or wrapped in paper, it can be stored in a cool place, which can also prolong its preservation. The storage of vegetables is often dug and stored in cellars in the north. When it is cold in winter, the vegetables are stored in cellars, covered with grass, and kept warm and antifreeze.
As for meat, if you want to store it for a long time when it is fresh, or salt it. Apply salt to the inside and outside of the meat, and put it in a tank urn. The meat will taste salty and enter the meat from time to time, which can prevent it from rancid and increase the flavor. There is also a method of smoking. Smoke the meat with fireworks, the water vapor in the meat will be removed, and the smoke will be obtained, and it can also be stored for a long time.
For oil storage, a porcelain urn is required. The porcelain urn is clean and unsullied, the oil enters it, it is tightly sealed, and it is protected from direct sunlight, which can keep the oil quality unchanged for a long time.
And so on, are the methods for storing anhydrous soil. According to the characteristics of the object, choose the appropriate method to keep the object safe for a long time, in case of emergency.

First, choose equipment carefully. The utensils used must be sturdy and durable, so as not to be damaged during handling and damage the objects. Like the transportation of a boat, the hull of the ship must be solid, and the cabin must not leak, so that the fireless things can be kept stable inside. For the transportation of the cart, the axles are smooth and the frame is firm to prevent damage during the journey.
Second, it is fire-proof and fireproof. Although it is a fireless thing, the surrounding environment cannot be ignored. Keep away from fire sources and kindles, and do not place it in a place that is easy to reach fireworks. In the warehouse, fireworks are strictly prohibited, and the people on duty must not be slack, so as to prevent accidental fires from damaging the transported things. If it is transported in the field, when encountering an open flame operation, it should be detoured or properly protected to ensure that there is no Mars intrusion at all.
Third, properly placed. Objects without fire may be fragile, vulnerable, or have uneven weight. When placing, it must be done according to its characteristics. Fragile people should be lined with soft objects and separated neatly so as not to collide with each other; those with uneven weight should be reasonably arranged so that their center of gravity is stable and will not tip over during handling.
Fourth, choose a good time to transport them. The weather should not be ignored, and bad weather such as rainstorms, strong winds, and sand and dust should be avoided. Rain and wetness may damage objects, strong winds or cause uncontrolled handling, and sand and dust ingress are also dangerous. When the weather is fine and the wind is calm, it is advisable to set off.
Fifth, special personnel to protect the transportation. The escort should have experience and be familiar with the characteristics of the transported goods. Check frequently on the way, and if there is any abnormality, deal with it immediately. At the time of handover, carefully count to ensure that the quantity and condition of the non-fire things are correct, and then the responsibility of transportation can be completed. In this way, the goods without fire can be transported in a comprehensive manner, and everything will go smoothly.

If you want to know how the compatibility of anhydrous substances with other chemicals is, you should explore it carefully.
To observe all kinds of things, each has its own nature in the wonders of creation. To observe the appearance of anhydrous substances and other things, the first thing to do is to examine the nature of the two in detail. For example, the principle of five elements generating energy, gold generates water, aquatic wood, wood generates fire, fire generates earth, and soil produces gold; there are also gold and wood, wood and earth, earth resists water, water resists fire, and fire resists gold. In the field of chemistry, matter also has a state of mutual growth and resistance.
First, examine its chemical structure. Looking at the atomic arrangement and chemical bonding of anhydrous substances is like looking at the veins of mountains and rivers. If its structure contains active groups, such as carboxyl groups, hydroxyl groups, amino groups, etc., it is necessary to observe that there are groups that cannot react with them when they come into contact with them. Take the carboxyl group as an example, it is acidic, and when it encounters alcohols containing hydroxyl groups, under specific conditions, it may react with esterification to form esters and water.
Second, test its chemical activity. Anhydrous substances of active metals, such as sodium anhydrous substances, are extremely active and explode when exposed to water. When encountering substances containing active hydrogen, they are also prone to violent reactions. Therefore, when exploring compatibility, it is necessary to clarify the strength of its activity. If anhydrous substances have high activity, they need to avoid mixing with substances with equivalent or higher activity to prevent unexpected changes. < Br >
Third, consider its physical properties. Such as solubility, melting point, boiling point, etc. If the two have large differences in solubility and want to be in the liquid phase system together, it may be difficult to be compatible, or cause stratification. If the melting point and boiling point are very different, under specific temperature conditions, one is the gas phase and the other is the solid phase, which also affects its compatibility.
Fourth, look at its environment. Temperature, humidity, light, etc. can all be variables. Under high temperature, the originally stable anhydrous substance may react with others; strong light irradiation may also cause luminescent chemical reactions.
To explore the compatibility of anhydrous substances with other chemicals, it is necessary to make a good medical diagnosis, conduct a detailed investigation, and comprehensively consider the chemical structure, activity, physical properties, and environmental factors in order to obtain its true content, avoid harmful reactions, and ensure the safety of things.