Melting point: -89.5℃
Boiling point: 82℃(lit.)
Density: 0.785 g/mL at 25℃(lit.)
Vapor density: 2.1 (vs air)
Vapor pressure: 33 mm Hg (20℃)
Refractive index: n20/D 1.377(lit.)
Isopropanol is also known as fire wine, dimethyl methanol, 2-propanol, the simplest secondary alcohol, and one of the isomers of n-propanol. A colorless, flammable liquid with a strong odor. It has an odor like a mixture of ethanol and acetone, and its odor is not great. It is soluble in most organic solvents such as water, alcohol, ether, benzene, chloroform, and can be miscible with water, alcohol and ether, and can form an azeotrope with water. Density (specific gravity): 0.7863g/cm3, melting point: -88.5°C, boiling point: 82.5°C, flash point: 11.7°C, spontaneous ignition point: 460°C, refractive index: 1.3772. Its steam can cause slight irritation to the eyes, nose and throat; it can be absorbed by the body through the skin. Its vapor and air can form an explosive mixture. The explosion limit is 2.0%~12% (volume). Belongs to a kind of medium explosive dangerous goods. It is a flammable and low-toxic substance. The toxicity of vapor is twice that of ethanol, but the toxicity is opposite when taken orally.
It has a wide range of uses as organic raw materials and solvents. As a chemical raw material, it can produce acetone, hydrogen peroxide, methyl isobutyl ketone, diisobutyl ketone, isopropylamine, isopropyl ether, isopropyl chloride, as well as fatty acid isopropyl ester and chlorinated fatty acid isopropyl ester Wait. In fine chemicals, it can be used to produce isopropyl nitrate, isopropyl xanthate, triisopropyl phosphite, aluminum isopropoxide, medicines and pesticides, etc. It can also be used to produce diisopropyl acetone, isopropyl acetate and Thymol and gasoline additives.
As a solvent, it is a relatively inexpensive solvent in industry. It has a wide range of uses and can be freely mixed with water. It has a stronger solubility for lipophilic substances than ethanol. It can be used as a solvent for nitrocellulose, rubber, paint, shellac, alkaloids, etc. It can be used to produce coatings, inks, extractants, aerosols, etc. It can also be used as antifreeze, cleaning agent, additive for blending gasoline, dispersant for pigment production, fixing agent for printing and dyeing industry, antifogging agent for glass and transparent plastics, etc. Used as a diluent for adhesives, antifreeze, dehydrating agent, etc.
Propylene and water were pressurized to 1.96MPa and preheated to 200°C. After mixing, they were added to the reactor for hydration reaction. The reactor was equipped with a phosphate diatomaceous earth catalyst or a tungsten catalyst. The reaction temperature was 95°C and the pressure was 0.96MPa, the molar ratio of water to propylene is 0.7:1, the single-pass conversion of propylene is 5.2%, and the selectivity is 99%. After the reaction gas is neutralized and heat exchanged, it is sent to the high-pressure cooler and the high-pressure separator. The isopropanol in the gas phase is sprayed and recovered with deionized water in the recovery tower. The unreacted gas is pressurized by the circulating compressor and then recycled ( Maintain 85% of the propylene content in the circulating system). The liquid phase is low-concentration isopropanol (15%-17%), and 85%-87% isopropanol aqueous solution is distilled through the rough distillation tower, and then concentrated to 95% through the distillation tower, and then concentrated by extraction with benzene. More than 99%.