Twelve tortoises have their traces in the mixed use of ancient methods. It was first used for food, and "Zhou Li" describes that there were six animals, six beasts, and six birds in the palm of the human hand, for the king's food and shame. Although turtles are not among the regular meals, they may be a delicacy in time. Twelve tortoises, or for the simple taste of the meal, are cooked by the method of braising, adjusting the five flavors, making them delicious and have unique qualities, which are good for eaters.
Furthermore, used for medicine. Ancient healers, believe that the various parts of the tortoise have medicinal uses. Tortoise shell, for a long time for medicinal purposes, nourishing yin and latent yang, nourishing kidneys and bones and other effects. Twelve tortoises, or by the method of halogenation, take the medicinal power of the tortoise to meet the needs of the sick. In the way of medicine, or as a dose, it heals the deficiency, helps the righteousness, and helps the body to be healthy.
There is also a way of divination. In ancient times, divination was an important matter, and the turtle shell was used for divination because of its unique texture and characteristics. Twelve tortoises, or as part of the divination ritual. The tortoise has been halogenated, and its shell is cracked after the fire. The divination person regards its appearance and the omen to see the good or bad, and measure the good or bad, as the basis for decision-making. It is important to guide in sacrifices and expeditions.
In addition, Yu Li. Turtles have auspicious and longevity in ancient times. Twelve tortoises, or as ritual vessels for sacrifices and feasts. At the sacrifice, it is presented in front of the gods, expressing the heart of worshiping the gods and praying for the blessings of the gods; at the banquet, it is enjoyed by the distinguished guests, honoring the dignity and courtesy, showing the greatness of the ceremony and the importance of the love, and maintaining the order of interpersonal and social relations.

Halododecane, also known as lauryl chloride, is an organic compound. Its physical properties are as follows:
- ** Appearance properties **: It is a colorless or light yellow liquid under normal conditions, clear and transparent, pure in appearance, and has no obvious impurities. This appearance property makes it easy to identify and operate in many application scenarios.
- ** Odor **: It has a mild fragrance, non-pungent or strong odor. In general environments, the smell will not cause discomfort, which is beneficial to its use in some fields that require odor to a certain extent.
- ** Melting point **: Melting point is -9.6 ° C. The lower melting point indicates that the halododecane is in a liquid state at room temperature, and no special heating means are required to maintain its liquid state, which is convenient for storage and transportation.
- ** Boiling Point **: The boiling point reaches 260.8 ° C, which is relatively high. The high boiling point characteristics enable the halododecane to maintain a stable liquid state in a higher temperature environment, and it is not easy to vaporize and volatilize, providing possibility for applications under high temperature conditions.
- ** Density **: The density is about 0.868g/cm ³, which is similar to the density of common organic solvents. This characteristic determines its distribution and phase behavior in the mixed system, and has an important impact on the chemical reactions or physical processes in which it participates.
- ** Solubility **: It is difficult to dissolve in water. Because halododecane is an organic compound, the molecular polarity is weak, and the force between it and water molecules with strong polarity is small, so it is difficult to dissolve. However, it can be miscible with organic solvents such as alcohols, ethers, and chloroform. This solubility makes it a good solvent or reaction medium in the field of organic synthesis, which helps the dissolution and reaction of organic substances.
- ** Refractive index **: The refractive index is about 1.4443, reflecting the ability of halododecane to change the direction of light propagation. This optical property has certain reference value in some scenarios involving optical research or applications, such as applications in specific optical materials or analytical detection.

Potassium halide has a strong and active nature, and it is suitable for many things. Its quality is soft, its color is silver-white, and its luster is dazzling. It is exposed to the air, quickly and oxygenated, and its color changes and loses its luster.
Potassium halide reacts violently when it encounters water, floats on the water surface, swirls and cries, and has a fire. This is because it should produce hydrogen with water, and it should be exothermic, causing hydrogen to ignite. Its corresponding formula is: potassium halide + water → a certain potassium carbide + hydrogen.
In acids, potassium halide should be particularly strong, and quickly react with hydrogen in acids to produce hydrogen bodies. Taking hydrochloric acid as an example, it should be as follows: haloduopotassium + hydrochloric acid → a certain potassium carbide + hydrogen.
haloduopotassium can also react with halogen elements to produce halides. Combined with chlorine to form a certain potassium carbide, which is white solid, has a high melting boiling point, and is easily soluble in water. Its formula is: haloduopotassium + chlorine → a certain potassium carbide.
In organic reactions, haloduopotassium is also often an important agent, which can promote the reaction and the formation of the reaction.
However, haloduopotassium is active and should be used with caution. It should be stored in kerosene and other inert liquids to avoid contact with air and water. When using it, it should also be operated in accordance with regulations to prevent danger.

The twelve methods of halogen production are related to the production of salt. In the production process, many precautions cannot be ignored.
The first place to be selected. The advantages and disadvantages of brine depend on the benefits of the land. It is necessary to choose a place with salty soil on the seashore, and the soil is rich in salt, which is a good choice. If the land is not suitable, the halogen quality is not good, and the quality of the salt will be affected by it.
The second is brine collection. The method of brine collection needs to be carried out with caution. Spread grass ash, serpent clam shells and the like on the ground, so that it absorbs the salt of sea air, and then drizzle water to take brine. When dripping water, the speed of the water flow and the amount of water are all exquisite. Urgent is thin, slow is rich in brine.
Furthermore, the concentration of the brine is crucial. If the brine is not concentrated, it should not be boiled rashly. When the brine is tested with stone lotus, and the stone lotus floats and is horizontal, the brine is usable; if it sinks, the brine is not concentrated, and it needs to be concentrated again. The method of concentration, whether sun-dried or boiled, depends on the time and place.
When the brine is boiled, it is particularly critical to control the heat. If the fire is fierce, the brine will boil and overflow, and if the fire is small, it will take time and have no work. Boil it over high heat first, so that the impurities in the brine will rise, and then discard it; then turn to low heat and slowly boil it, so that the brine will gradually become a salt flower.
The pot for boiling the brine needs to be intact and there is no risk of leakage. The size and material of the pot also affect the decoction of the brine. It should be prepared in advance, such as salt fishing tools and salt-containing utensils, and should not be temporarily panicked.
When the brine is being boiled, personnel must also perform their duties. Those who hold the fire, watch the brine, and fish the salt all need to be dedicated and not slack a little. Only when everyone works together can the salt be produced in an orderly manner.
Furthermore, the crystallization of salt also needs to be paid attention to. When the salt flower first appears, do not rush to fish it out, and wait for its crystallization to be sufficient before you can start. If you fish it too early, the salt will not be formed; if it is too late, it will be easy to burn.
In the entire production process of the twelve halogen production methods, all the details are interconnected, and one mistake will lead to failure. Only by paying attention to everything can you make good salt.

In the realm of China, the market price of twelve alum stones often changes due to various reasons. Alum is useful in all kinds of industries, so its price is valued by everyone.
In the past, the price of twelve alum stones in the market was about tens to hundreds of dollars per stone. However, this is not a fixed number, and it varies according to the time of day, geographical location, and personnel. If the age is abundant and the karma is prosperous, and there are many people who need alum, the price may rise; if the year is not good, everything is desolate, and those who need it are few, the price may drop.
In addition, it is produced in different places, and the texture is also different, and the price also varies accordingly. The price of the best alum, pure and flawless, must be higher than that of regular products; while the second-class, containing more impurities, the price is slightly lower. The distance of the place of origin is also a variable of the price. If the place of origin is close to the market and the freight is saved, the price is flat; if it is far away in remote soil and the transshipment is difficult, the price should be slightly higher.
When it is close to the market, the price of twelve alum stones also changes with the change of world conditions. However, roughly speaking, the price of each stone is about one hundred to five hundred dollars. When the market changes, the buyer and seller agree on the price according to its quality, its quantity, and its needs. Therefore, if you want to know the exact price, you should pay a detailed visit between the shops before you can get it.