1,3-Thiazole-2-Carbaldehyd

In "Tiangong Kaiwu", it is said that hemp is an important textile raw material in ancient China. It has a wide range of functions and is crucial to people's livelihood.
The primary use of hemp is to weave fabrics. In ancient times, hemp-woven clothing was worn by the public on a daily basis. Its quality is tough, durable and wear-resistant, and it has good air permeability. When worn in hot summer, it can make the body feel cool, and it is quite suitable for the common people when they work. For example, farmers work hard in the fields and wear linen clothes, which can withstand the heat and make it easy to work. Furthermore, hemp weaving is also often used to make quilts, which can provide warmth for cold nights.
Hemp is also used in papermaking. In ancient paper production, hemp was one of the key raw materials. Using hemp to make paper, the paper is flexible and the fibers are delicate, which can be preserved for a long time. It has made great contributions to writing and recording ancient books. Many important documents and classics have been passed down on hemp paper, which has continued the wisdom and culture of the ancients.
The production of ropes is also indispensable for hemp. Because of its strong fibers, the ropes made by rubbing are sturdy and durable. In the sailing of boats, hemp ropes are used to tie boats and control sails to ensure the safety of boating on the water; in the construction of buildings, the power of hemp ropes is also used to lift heavy objects.
In addition, hemp also has special significance in rituals such as sacrifices. Fabric woven from hemp is often used as a sacrifice to carry the ancient people's awe and prayer for the gods and spirits of heaven and earth.
To sum up, hemp had important uses in many aspects of textiles, writing, production and rituals in ancient society, and was an important material basis for the lives of the ancient people.

"Tiangong Kaiwu" states that flax has many physical properties. It is soft in quality and delicate to the touch. Because the flax fibers are fine and regular, it is rubbed in the hand, smooth as fat, and there is no risk of rough and stinging.
The strength of flax is quite good, and it can withstand large tensile forces without breaking. This is because its fiber structure is dense and the intermolecular bonding is stable, so it is made into a fabric, which is very durable and can be used for daily use.
Furthermore, flax has good air permeability, many fine pores on the fabric, and the air circulation is unobstructed. Even when you are in the heat, wearing flax clothes, you feel refreshing, and the sweat is easy to dissipate, without the feeling of stuffy and sticky.
Flax also has the characteristics of strong moisture absorption. In case of humid environment, it can quickly absorb water vapor and keep the surface dry. When dry, it can slowly release the absorbed water vapor, adjust the surrounding microclimate, and create a comfortable atmosphere.
And linen has excellent antistatic properties. In the dry season, when wearing linen clothes, it rarely encounters static interference. Walking and sitting in the bedroom is more secure.
The unique physical properties of linen have won it wide application in many fields such as textiles, and are favored by the world.

As for methyl ether, its properties can be investigated.
The physical reason of methyl ether is that under normal circumstances, it is flammable in color and has a slightly sweet smell. Its boiling temperature is low, and it has five degrees below zero. This characteristic makes it easy to form in normal environments. And the density of methyl ether is slightly heavier. If there is a leak in dense space, it is easy to gather below.
And the chemical properties. Methyl ether is flammable. Mixing with air can form explosive mixtures, which explode in case of open flame and high flammability. The inverse equation of its combustion is roughly as follows:\ (2C_ {2} H_ {6} O + 7O_ {2}\ stackrel {ignition }{=\!=\! =} 4CO_ {2} + 6H_ {2} O\), and the amount of fuel is high.
Methyl ether also has a certain degree of certainty, but under specific conditions, if it encounters oxidation, it can also generate reaction. For example, oxidation and other oxidation encounters may lead to oxidation reaction, causing its molecules to change.
In addition, methyl ether can form some gold complexes, which makes it capable of filling and matching in some chemical synthesis reactions. In addition, in acidic or acidic environments, methyl ether can also produce reactions such as hydrolysis under certain conditions. This reaction usually requires specific catalysts and reactions. Therefore, the chemical properties of methyl ether make it useful in many fields such as chemical industry and energy.

In "Tiangong Kaiwu", there are many ways to make mercury, which are related to the change of lead and mercury, and also involve the control of fire conditions. This is discussed in detail.
One of them is to use cinnabar as a source. The cinnabar is also the main source of mercury. Take the cinnabar and put it in a closed container, add appropriate carbon powder, and calcine it at high temperature. Among them, the carbon has the power of reduction, which can reduce the mercury compounds in the cinnabar to mercury elemental. The principle of its chemical reaction is that the carbon combines with the oxygen in the cinnabar, and the oxygen is taken away to precipitate mercury. Looking at it, the steam of mercury gradually rises in the furnace, and when it is cold and condensed, liquid mercury is obtained. In this process, the heat is very important. If the fire is weak, the mercury is difficult to precipitate, and if the fire is strong, the mercury is easy to evaporate and dissipate. Therefore, the person who holds the fire needs to be skilled, observe the slight changes in the heat, and adjust it in a timely manner.
Second, start with the lead amalgam. First make the lead amalgam, and fuse the lead and mercury in an appropriate proportion. Later, the lead amalgam can be treated by distillation. Use a special distillation apparatus to heat the mercury amalgam. Because the boiling point of mercury is lower than that of lead, when heated, the mercury first converts into steam and rises, and through the condensation device, it is restored to liquid mercury. The key lies in the tightness and condensation efficiency of the distillation equipment. If the seal is not good, the mercury vapor escapes, which not only damages the output, but also stains the environment; if the condensation is not good, the mercury recovery
Third, it is based on other mercury-containing minerals. Mercury-containing minerals in the world, in addition to cinnabar, also have other kinds. For example, some mercury oxides, sulfides and other minerals can be chemically treated to transform them into forms that are easy to extract mercury. Either dissolve with acid or leach with alkali, depending on the characteristics of the minerals. After a series of separation and purification steps, such as precipitation, filtration, distillation, etc., pure mercury is finally obtained. This way requires a deep understanding of chemical principles and understanding of mineral reaction characteristics in order to effectively extract.
All these methods are based on the wisdom and practice of the ancients. They have made great contributions to the production of mercury, laying a solid foundation for the development of metallurgical chemistry in later generations.

"Tiangong Kaiwu" says: Mercury is mercury, mercury is also mercury. Mercury storage and transportation are related to life and cannot be ignored.
Mercury is toxic and volatile. In the storage place, you must choose a high dry and ventilated place, and do not mix with other things to prevent it from seeping, dispersing, contaminating and other things. Hidden utensils must also be tight, and porcelain jars, lead bottles, etc. are often used, because they do not phase with mercury. When mercury enters the utensils, its mouth must be sealed to prevent mercury gas from escaping and hurting people's internal organs.
As for transportation, it is particularly dangerous. Escorts must be familiar with mercury properties and be cautious. When handling, lift and handle it with care, so as not to make the container bump or collide, lest it be damaged and the mercury flow out. If you encounter heat on the way, you should choose a cool time to avoid the extreme heat in the day. If you cover it with heat, the mercury gas will become more and more abundant, and it is easy to leak.
And in the place where the mercury passes, there should be no food or drink to prevent accidental ingestion and contamination. If you accidentally release mercury, it will be covered with sulfur quickly, and the mercury will be turned into Dan when it encounters sulfur, and the toxicity will be slightly reduced. At that time, when you leave the scene quickly, ventilate and change the air to avoid the inhalation of mercury gas and cause disease.
Therefore, the storage and transportation of mercury, all the details are crucial to your life, and you must not ignore them. You must follow the ancient law and be cautious to keep it safe.