It is reported in "Tiangong Kaiwu" that dialum is alum, the main component is aluminum potassium sulfate, which is widely used in traditional processes.
First, it is used for water purification. The water of rivers and lakes contains more impurities such as sediment. Take an appropriate amount of dialum and grind it into the water. The dialum undergoes hydrolysis in contact with water to form an aluminum hydroxide colloid. This colloid has adsorption properties and can absorb suspended impurities in water, making the water clear and easy to use. It is often used in civil daily water treatment and some simple water conservancy facilities to purify water.
Second, food processing. When making fried pasta such as fried dough sticks, dialum is often mixed with baking soda, salt, etc. in a certain proportion. The reaction between dialum and baking soda produces carbon dioxide gas, which makes the dough puffy and porous, and the fried fritters have a crispy taste. In the process of pickling kimchi and other foods, dialum can play a role in stabilizing pH, inhibiting microbial growth, helping to preserve kimchi, and keeping kimchi crispy.
Third, the field of papermaking. In the process of making paper, the pulp needs to be treated to make usable paper. Adding dialum can make the fine fibers in the pulp better stick together and enhance the strength of the paper. At the same time, dialum can adjust the water absorption of the paper, making the paper suitable for writing and printing, which is of great significance to the development of ancient paper industry.
Fourth, the printing and dyeing industry. In the pretreatment process of fabric dyeing, soaking the fabric in dialum solution can enhance the adsorption capacity of the fabric to the dye. The acidic environment produced by the hydrolysis of aluminium and the combination of aluminum ions and fabric fibers make the dye easier to adhere, the dyeing is more uniform and firm, and the quality of printing and dyeing is improved. It provides assistance for enriching the color of fabrics and developing printing and dyeing techniques in ancient times.

Dideuterium (2-deuterated ethane) has unique physical properties. Its density is slightly different from that of ordinary ethane. Because the mass of the deuterium atom is greater than that of the hydrogen atom, the molecular weight of the dideuterium increases, and the density is slightly higher than that of conventional ethane.
Its boiling point also changes. Due to the effect of isotope substitution on the intermolecular force, the boiling point of dideuterium is slightly higher than that of ordinary ethane. This is because the characteristics of the deuterium-deuterium bond or deuterium-carbon bond are different from that of the ordinary hydrogen-carbon bond. The intermolecular force changes, so that the boiling requires more energy and the boiling point rises.
The melting point of dideuterium is also different from that of ordinary ethane. Because the molecular arrangement and interaction in the crystal structure are affected by isotope effects, the melting point is also different, or higher or lower than that of ordinary ethane, depending on the specific crystal structure and intermolecular force changes.
In terms of solubility, the solubility of dideuterium in non-polar solvents such as alkanes and aromatics is similar to that of ordinary ethane, and both follow the similar principle of miscibility, because both are non-polar molecules. However, in polar solvents, the solubility may be slightly different due to changes in the molecular mass and structure of dideuterium.
In addition, the spectral properties of dideuterium are significantly different. In its infrared spectrum, the position of the vibration absorption peak related to deuterium is different from that of hydrogen atoms in ordinary ethane. Due to the large mass of deuterium atoms, the vibration frequency is low, and the absorption peak is shifted to a low wavenumber. This characteristic is often used to identify and analyze deuterium-containing compounds.

1% 2C3 is carbon monoxide ($CO $). Carbon monoxide is a colorless, odorless and odorless gas, and its chemical properties are relatively unstable. Under certain conditions, carbon monoxide is flammable and can be burned in the air to generate carbon dioxide. The chemical equation is $2CO + O_ {2}\ xlongequal {ignited} 2CO_ {2} $. This reaction reflects its ability to react violently with oxygen. At the same time, carbon monoxide also has reductive properties. For example, it can react with copper oxide under heating conditions. $CO + CuO\ xlongequal {\ Delta} Cu + CO_ {2} $reduces copper oxide to copper, and itself is oxidized to carbon dioxide.
"Dioxy-2-alkyne", presumably here I want to say carbon dioxide ($CO_ {2} $) and acetylene ($C_ {2} H_ {2} $). Carbon dioxide is chemically stable, generally does not burn, does not support combustion, and is often used to extinguish fires. It can react with water to form carbonic acid, $CO_ {2} + H_ {2} O = H_ {2} CO_ {3} $, and can also react with alkali solutions, such as calcium hydroxide solution to form calcium carbonate precipitation and water, $CO_ {2} + Ca (OH) _ {2} = CaCO_ {3}\ downarrow + H_ {2} O $.
Acetylene is an unsaturated hydrocarbon with active chemical properties. It is flammable, and the combustion flame in air is bright and accompanied by strong black smoke. The chemical equation for its combustion is $2C_ {2} H_ {2} + 5O_ {2}\ xlongequal {ignited} 4CO_ {2} + 2H_ {2} O $. Due to the carbon-carbon triple bond in its molecule, an addition reaction can occur, such as with bromine water, which fades bromine water.
In summary, the chemical properties of carbon monoxide, carbon dioxide and acetylene are not all stable. The chemical properties of carbon monoxide and acetylene are relatively active, while carbon dioxide is relatively stable.

The method of making two-2-allyl has a long way to go. The "Tiangong Materials" has not yet developed the method of this specific chemical substance, but it can be deduced from the principle of the phase technology and similar ideas.
One, or can be extracted from natural substances. Many plants and plants in the world contain phase components. For example, some plants, which have the basic elements of the allyl phase, can be extracted by water immersion, wine soaking, steaming and other methods according to the ancient extraction technology. The method of water immersion is to cut up the plants, place them in water, and soak them in water to dissolve the allyl-containing ingredients in water. The residue is removed by cloth and other materials to obtain a liquid containing the ingredients. Wine soaking is to make use of the solubility of wine, soaking plants in it to dissolve the ingredients. The steaming method is particularly delicate. It is added to the steaming material to make the allyl-containing material melt, and it is condensed and liquefied to collect, which can make the product more refined.
Second, it may be possible to borrow the method of synthesis. Ancient and modern precision methods have already proved the principle of inversion. Compounds containing allyl groups that are similar to other compounds can be used to react. For example, alkenyl-containing substances can be used to react to substances containing alkenes, or allyl-containing derivatives can be formed. It can also use the principles of acid reaction, oxidation of the original reaction, etc., to reduce the quality of the whole product, so that it can be transformed in the direction of generating di- 2-allyl. During operation, carefully control the reaction parts, such as the degree, the proportion of the material, etc. High or low degree can make the reaction not as good as the period; the reaction is not good, or the reaction is not complete, or the decomposition of the material is caused; the proportion of the material is inappropriate, and the desired material is also obtained.
Third, or the action of microorganisms can be borrowed. In nature, many microorganisms have a special ability to replace, or can use specific substrates and raw materials to generate di- 2-allyl on their behalf. The ancients did not fully understand the function of microorganisms, but they had already made use of microorganisms such as leavening wine and vinegar. Or they can seek microorganisms with this ability to cultivate base culture in an appropriate environment, so that they can be produced in an appropriate environment. Among them, it is necessary to obtain correct microorganisms, and to create an appropriate environment, including temperature, acidity, composition, etc.

In the process of storage and storage of 2-alkenes, it is important to pay more attention to the
The first safety prevention, because of its flammability, in the storage place, it is necessary to control the fire source and prohibit all factors that may cause ignition, such as open fires and sparks. The equipment is also well-equipped to prevent flammable explosion.,,,, Therefore, it is advisable to prevent exposure and rain during storage.
Furthermore, it is very important to prevent leakage. Storage containers and pipelines should be checked regularly to ensure good confidentiality. If there is a leak, it is necessary to quickly identify an emergency case, isolate it, evacuate people, cut off the fire source, and deal with it according to the characteristics of the object, such as adsorption with activated carbon.
In addition, the separation of the container should not be ignored. The storage container tools should clearly show the name of the object, the characteristics of the dangerous material, etc., and reasonably divide the storage and storage according to their chemical properties to avoid the mixing of incompatible materials.