2-Quinolinecarboxylic acid, 4-hydroxy-, methyl ester

Alum is widely used. As recorded in "Tiangong Kaiwu", there are five types of alum, including black alum, alum, yellow alum, gall alum, and green alum. In today's words, green alum, its use is particularly important.
One of the uses of green alum is in the dyeing industry. In ancient dyers, green alum was often used as a mordant. When fabrics are dyed, green alum can be combined with dyes to make the color adhere to the fabric more firmly, and the color is more vivid and lasting. For example, dyeing blue and blue, green alum participates in it, which can help the dye to better stick to the cloth and not fade over time. Therefore, in the dyeing workshop, green alum is an indispensable material.
The second use is related to metallurgy. After calcination and other methods, green alum can extract metal elements such as iron. In ancient iron smelting techniques, green alum can be used as an auxiliary raw material, which helps to improve the purity and quality of iron. Although the ancient people may not have known the principle of its chemical change, in practice, it has been known that green alum can promote metallurgy and make the iron smelted more tough. It is suitable for building all kinds of utensils, such as agricultural implements and weapons.
Furthermore, green alum also has its uses in medicine. According to ancient medical records, green alum has the effects of drying, dampening and reducing phlegm, stopping hemostasis and diarrhea, detoxifying and killing insects. It can be used to treat scabies, mouth sores, haemorrhage in the stool, diarrhea and other diseases. Doctors use their characteristics to make medicines, treat people's diseases, and make great contributions to the well-being of the people.
Green alum can also play a role in agriculture. Appropriate application of green alum in the soil can adjust the pH of the soil, improve soil quality, and promote the growth of some crops. Especially for some plants that like acidic soil, green alum can create a suitable environment for its growth, help them thrive, and increase crop yield.
As for ferrous oxalate dihydrate, its use is also considerable. Although it may not be as widely used as green alum in ancient times, it is gradually recognized by the world. In some specific processes, ferrous oxalate dihydrate can be used as a raw material to participate in the reaction to generate special compounds for the production of pigments. The pigments made by it are unique in color, and can be used for painting or ceramic painting, which can show different artistic effects. In the art of alchemy, ferrous oxalate dihydrate may also participate. Although it involves many mysterious and illusory methods, it also reflects the exploration and attempt of the ancients on its nature.

Its physical properties are unique.
Looking at its shape, under normal circumstances, it is mostly a colorless and transparent liquid, just like clear water, clear and free of variegated colors, showing its pure state. Its texture is uniform, without particles, and when it flows, it is smooth and smooth, like the water of a stream, without the feeling of stagnation.
When it comes to smell, it emits a unique smell. It is not pungent and intolerable, but has its own characteristic smell. It is like a subtle fragrance, but it is different from ordinary fragrance. However, this smell is not disgusting, and its characteristics can be recognized when smelled.
Its boiling point is a key physical property. Under specific conditions, it can reach a certain temperature, when the thermal motion of molecules intensifies, and the substance gradually changes from liquid to gaseous. The value of this boiling point determines its state change under different temperature environments. The melting point cannot be ignored. When the temperature drops to a certain extent, the movement of molecules weakens, and the substance solidifies from liquid to solid. The temperature of this melting point defines the limit of its solid-liquid transition.
In addition, its solubility also has characteristics. In some organic solvents, it can be well dissolved and blend with each other, as if it is integrated into one, regardless of each other. However, in water, its degree of solubility may vary, or it is insoluble, or slightly soluble. This characteristic is related to its existence and application in different medium environments. < Br >
And its density, compared to water, is lighter or heavier. The value of this density affects its position and distribution in the liquid system, and is an important consideration in related chemical operations and applications.
In summary, the physical properties of alum-based ditetraethyl borate are of key significance in chemical research and practical applications, laying the foundation for people to deeply understand and use this substance.

"Tiangong Kaiwu" is a scientific and technological masterpiece written by Song Yingxing in the Ming Dynasty, but it does not describe the synthesis method of "carboxyl acetamide". Today, in ancient French proverbs, the synthesis method is as follows:
To make carboxyl acetamide, first prepare its raw materials. Take an appropriate amount of ethanol and use the ancient distillation technique to improve its purity and remove impurities. Ethanol, mild in nature, is the basis for subsequent reactions.
Put the purified ethanol in a special pottery kettle and add an appropriate amount of catalyst. This catalyst, when ground into powder with specific minerals, is mixed with plant ash in exquisite proportions. Slow down under the kettle with a slow fire to make ethanol slowly vaporize and rise in the kettle. < Br >
Another appropriate amount of acetic acid is taken, and it is also refined by distillation. Acetic acid has a strong taste and is lively. When the ethanol is fully gasified, the refined acetic acid is slowly injected into the kettle and merged with the gas phase of the ethanol. At this time, the temperature in the kettle should be carefully controlled by the heat, so that neither the high temperature can cause the reaction to be too fast, nor the low temperature can cause the reaction to be slow.
The two meet, and under the action of the catalyst, the esterification reaction slowly occurs. The gas phase in the kettle is rolled, and new substances are gradually formed. After the reaction is settled, the gas phase is recombined into a liquid phase by the method of condensation, which flows at the bottom of the kettle.
However, this liquid phase is not yet pure carboxyl acetamide, which contains many impurities. Then use a fine silk cloth to filter out the insoluble matter. Then use the technique of recrystallization, take an appropriate amount of water, dissolve the filtrate, heat to dissolve the solution, and then evaporate the water over slow fire. When there is crystallization, it is the crude product of carboxyl acetamide.
The crude product still needs to be refined, and the method of recrystallization is used to remove its impurities and increase its purity. Each recrystallization requires careful control of temperature and water to improve the quality of the crystal. After several refinements, pure carboxyl acetamide can be obtained, which has good color purity and quality and can be used for various purposes.
Although the above synthesis method is based on the ancient classical Chinese, it may be different from the modern scientific synthesis method, but it also follows the principles and skills of ancient chemistry, hoping to solve the doubt of synthesis.

For ethyl alum dibenzoate, many precautions need to be paid attention to during storage and transportation.
First storage environment. When placed in a cool and dry place, away from fire and heat sources. Because of its nature or strong response to heat and fire, it is safe to avoid it. If it is in a humid place, it may be eroded by water vapor, resulting in changes in its quality, so drying is essential. And the storage place needs to be well ventilated to allow the air to flow smoothly and avoid harmful accumulation.
When transporting, the packaging must be sturdy. When in a suitable container, seal it tightly to prevent it from leaking. When loading and unloading, the action should be slow, handle it with care, and do not let it collide or fall. If the packaging of this substance is damaged due to external force, it will flow out or stain other things, and it will also damage itself.
In addition, the cleanliness and adaptation of the means of transportation are also critical. Do not transport with corrosive or oxidizing substances to prevent chemical reactions. The vehicles or vessels used must be cleaned so that no other objects remain to avoid distractions.
Also need to have a clear logo. On the packaging, state its name, nature and precautions, so that the transporter can see at a glance, know the interests and act properly.
In short, the storage and transportation of alum ethyl dibenzoate, the environment, packaging, tools, and labeling factors should not be ignored. Only with care can we ensure its safety and quality.

The market price trend of nitro paraffin is related to many parties. Today, in ancient Chinese, the detailed analysis is as follows.
Saltpeter has a wide range of uses and is involved in various industries such as medicine and chemical industry. The change in its price is determined by the abundance of raw materials, the difficulty of craftsmanship, and the amount of need. If the raw materials are abundant, the mining is convenient, and the craftsmanship is refined, saving time and effort, the cost will drop, and the price may fall. However, if the need for a large increase, the supply will outstrip the demand. Although the raw materials and craftsmanship have not changed, the price will also rise.
Paraffin, with its characteristics, is commonly used in packaging, building materials and other industries. The trend of its price is also influenced by the price of crude oil, production capacity, and demand. Crude oil is the source of paraffin wax. If the price of crude oil rises, the cost of paraffin wax will increase, and the price will increase accordingly. If there is excess capacity and demand does not increase, the price will drop in order to sell goods. On the contrary, if the production capacity decreases and the demand is strong, the price will be high.
Looking at the market price trend of the two, it is often affected by various factors intertwined. It is difficult to determine whether the price will rise or fall due to changes in the situation, or due to government orders, or due to changes in the industry. Industry players need to understand the market and assess the situation in order to respond to changes in prices and seek the benefits of development.