1 Chloro 4 Iodo 2 Methylbenzene

Dimethyl ether, also known as methyl ether, is quite rich in chemical properties.
Dimethyl ether is flammable and can burn smoothly in air, with a light blue flame. Its combustion chemical equation is: $CH_3OCH_3 + 3O_2\ stackrel {ignited }{=\!=\!=} 2CO_2 + 3H_2O $. This property makes dimethyl ether a clean fuel, burning to produce carbon dioxide and water. Compared with traditional fossil fuels, it produces less pollutants, such as almost no sulfur oxides and particulate matter, and the amount of nitrogen oxides generated is also low, which has broad prospects in the field of environmental protection.
Dimethyl ether has certain solubility and can be miscible with most organic solvents, such as ethanol and acetone. Due to the polarity of dimethyl ether molecules, intermolecular forces can be formed with organic solvent molecules to promote mutual dissolution. This property makes it often used as a solvent in chemical production to dissolve substances that are insoluble in water and promote the reaction process.
Dimethyl ether is also weakly basic because the oxygen atoms in its molecules contain lone pairs of electrons and can accept protons. Under specific conditions, it can react with acids to form salts. However, its alkalinity is weak and can only react with strong acids under specific conditions.
In addition, dimethyl ether can undergo hydrolysis reaction, but this reaction usually requires a specific catalyst and suitable reaction conditions. Under the action of acidic or basic catalysts, dimethyl ether reacts with water to form methanol. This reaction is of great significance in the industrial production of methanol or the chemical conversion of dimethyl ether.
Dimethyl ether has diverse chemical properties and has important applications and potential value in fuels, solvents, chemical raw materials and other fields.

Acetyl aniline is a white glossy flake or white crystalline powder, which is used in industrial plants. Its physical properties are as follows:
1. ** External properties **: Under normal conditions, acetyl aniline is a white glossy flake or white crystalline powder. In addition, its properties make it easy to process.
2. ** Melting temperature: At 114.3 ° C, at this temperature, the solid acetyl aniline will melt into a liquid. At 304 ° C, that is, when added to the temperature, the acetyl aniline will melt rapidly. This melting temperature characteristic is very important in the operation of lifting and equalization.
3. ** Density **: The density is 1.2190g/cm ³, and the density of water is slightly higher. If it is put into water, it will sink. This density characteristic has a test value in the separation of acetylaniline and other substances with different densities.
4. ** Solubility **: Acetylaniline is slightly soluble in cold water, and can be well soluble in water, ethanol, ether, chloroform, acetone, etc. It means that if you want to dissolve acetylaniline, you can dissolve it in ethanol and the like, or increase the degree of water to promote its dissolution. This solubility depends on the extraction of acetylaniline in acetylaniline solutions or mixtures.
5. ** Efficiency **: Acetylaniline has low reliability, and its recovery rate is slow under normal conditions. This characteristic is beneficial to its survival and less loss caused by waste.

The common synthesis methods for making ethylbenzene are as follows:
First, the alkylation reaction of benzene and ethylene. This is an extremely important way to produce ethylbenzene in industry. In the presence of suitable catalysts, such as molecular sieve catalysts, benzene and ethylene can be alkylated. The principle is that the double bond of ethylene is opened and connected to the styrene ring to generate ethylbenzene. This reaction conditions are mild, the selectivity is quite high, and the ethylene source is wide and the cost is relatively low. It has significant advantages in the large-scale production of ethylbenzene.
Second, the alkylation reaction of benzene and ethylene chloride. Using Lewis acid such as anhydrous aluminum trichloride as a catalyst, benzene can react with chloroethane, the chlorine atom of chloroethane leaves, and ethyl replaces the hydrogen atom on the benzene ring to form ethylbenzene. However, in this reaction, the catalyst aluminum trichloride is highly corrosive, and the post-reaction treatment is more complicated, resulting in more waste and a certain pressure on the environment.
Third, ethanol reacts with benzene instead of ethylene. Under the action of a specific catalyst, ethanol is first dehydrated to form ethylene, and ethylene is then alkylated with benzene to produce ethylbenzene. Ethanol is rich in sources and can be obtained by biomass fermentation, making it a relatively green raw material. However, this reaction process is relatively complicated, and the control of reaction conditions is relatively strict.
Fourth, benzene and acetyl chloride are acylated by Fu-Ke to obtain acetophenone first, and then acetophenone is reduced to ethylbenzene. Although this method has many steps and complicated process, it can effectively avoid the occurrence of side reactions of polyalkylation, and the product purity is high. In special occasions where the purity of ethylbenzene is extremely high, this method has certain application value.

Dimethyl ether is used in many fields. In the field of fuels, it can be used as civil gas. Compared with liquefied petroleum gas, dimethyl ether burns more fully, generates less pollutants, and can greatly reduce environmental pollution. It meets the current environmental protection needs. In terms of industrial fuels, dimethyl ether can replace some traditional fuels, supply energy for industrial production, and improve energy efficiency.
In the field of chemical raw materials, dimethyl ether is widely used. It is a key intermediate for the preparation of high value-added chemicals, such as through specific chemical reactions, it can be converted into a variety of olefins, which are indispensable in the manufacture of plastics, rubber, and many other chemical products. Moreover, with its unique chemical properties, dimethyl ether can participate in the etherification reaction to prepare various ether compounds, which are widely used in solvents, additives and other products.
In the field of aerosols, dimethyl ether is often selected as an aerosol propellant due to its good solubility and volatility. In various spray products, such as hairspray, air fresheners, and pesticides, dimethyl ether can ensure uniform and stable ejection of the product, enhancing the use experience and effect.
In addition, in the field of refrigeration, dimethyl ether also shows certain application potential. Its thermodynamic properties make it promising to become a new type of refrigerant. Compared with traditional refrigerants, it has little damage to the ozone layer and low greenhouse gas effect, which is more in line with the concept of sustainable development.
Dimethyl ether plays an important role in many fields such as fuel, chemical industry, aerosol and refrigeration due to its clean and efficient characteristics. With the continuous progress of technology and the deepening of research and development, its application prospects will be broader.

There is no relevant record on the market price of 2-methylfuran in Tiangong Kaiwu, so it is difficult to answer this question directly in the format of Tiangong Kaiwu. However, in today's chemical substance market, the price of 2-methylfuran will fluctuate due to a variety of factors. Its price is mainly affected by the cost of raw materials, the complexity of production processes, and the relationship between market supply and demand. From the perspective of raw materials, if the price of raw materials required to prepare 2-methylfuran increases, the market price will also increase accordingly. In terms of production processes, if the process is cumbersome, the equipment and technical requirements are high, and the cost increases, the price will also rise. In terms of market supply and demand, if the demand for 2-methylfuran is strong and the supply is limited, the price may rise; conversely, the price will fall when the supply exceeds the demand. Generally speaking, the market price is probably in a certain range, but it varies depending on the specific quality, batch and trading period. In the fine chemical market, the price of small batches of high-purity products is relatively high, while the price of industrial batch products fluctuates within a certain range according to market conditions, and it is difficult to give a specific value.