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Isopropanol (Isopropanol)

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Isopropanol

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iso-Propyl alcohol
iso-propanol
2-propanol
isopropyl alcohol
PriOH
2-Propanol
i-propyl alcohol
Isopropanol

+Expand -Stow

67-63-0

C3H8O

60.095

2905122000

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English

Nature Description

Colorless transparent combustible liquid with smell similar to ethanol. Melting Point-88.5 ℃, freezing point-89.5 ℃, boiling point 82.45 ℃, vapor pressure (20 ℃)4.4kPa, relative density 0.7855(20/4 ℃), refractive index 1.3772, viscosity (20℃)2.4mPa · s, flash point 22℃. The upper limit 7.99 and lower limit 2.02 of spontaneous combustion in the air. It can be miscible with water, ethanol, ether and chloroform.

0.785

81-83oC

-89.5oC

-89.5℃

12oC

MISCIBLE

1.376-1.378

MISCIBLE

Product Applications

It is mainly used in pharmacy, also used as solvent, extractant, antifreeze compounds, etc.; Used as experimental chemical reagent and chromatographic analysis reagent; Isopropyl alcohol is an important intermediate in pesticide production, and can produce bactericide rice blast, rice blast, etc, insecticide acaricide aminomodine, isocarpine, methyl isosorphop,..

Production method

I. Its preparation method uses propylene as raw material, phosphate diatomite as catalyst, and directly synthesizes isopropyl alcohol with water under pressure. The process is to pressurize propylene and water to 2.03 MPa respectively, and preheat to 200 ℃. After mixing, it enters the reactor for hydration reaction. The reactor is equipped with phosphate diatomite catalyst, and the reaction temperature is 95 ℃, the pressure is 2.03 MPa, the molar ratio of water to propylene is 0.7: 1, the conversion rate of propylene is 5.2%, and the selectivity is 99%. The reaction gas is sent to high-pressure cooler and high-pressure separator after moderate and heat exchange, isopropyl alcohol in the gas phase is recycled by spraying without brine in the recovery Tower. The unreacted gas is recycled through the circulating compressor, and the liquid phase is low concentration isopropyl alcohol (15% ~ 17%), 85%~ 87% isopropyl alcohol aqueous solution was obtained through a crude distillation column, and then distilled to 95% by a distillation column, and then extracted to more than 99% by benzene. This method is the main method for producing isopropyl alcohol at home and abroad. This method does not use sulfuric acid, there is no corrosion problem, and the process is relatively simple. Second, sulfuric acid water is legal, that is, propylene containing more than 50% is used as raw material, and 75% ~ 85% concentrated sulfuric acid is used in the absorption tower under 50℃ and low pressure, dilute the absorption solution to 35% sulfuric acid content, and hydrolyze it into Isopropyl alcohol with low pressure steam in the desorption tower. The conversion rate of propylene in this method can reach more than 90%, and the crude isopropyl alcohol containing isopropyl alcohol can reach as high as 50% ~ 60%. This method uses sulfuric acid, which is highly corrosive to equipment. In addition, dilute sulfuric acid should be concentrated and applied. CH3CH = CH2 + h2s04 →(CH3)2CHOSO3H[H2O]→(CH3)2CHOH + h2s04 3. Absorb propylene from sulfuric acid, and then rectify after hydrolysis to obtain pure products. 4.2-Propyl alcohol can be produced by fermentation, and 16T grain is needed to produce 1 t2-propyl alcohol. The industry adopts propylene water legal, and earlier adopts sulfuric acid water Legal (also known as indirect water legal); In 1951, the British benemen Chemical Industry Company began to produce 2-propyl alcohol with propylene direct water legal. 1. The reaction between propylene and sulfuric acid in indirect water method first obtains isopropyl sulfate, which is hydrolyzed to form isopropyl alcohol. 2. Direct water legal propylene and water are heated and pressurized in the presence of catalyst for hydration reaction.

Security

Dangerous Goods Marking： F

Safety instructions： S7: keep the container tightly closed. S16: stay away from the fire source. S26: in case of contact with eyes, rinse with plenty of water immediately and send it to the doctor for diagnosis and treatment. S24/25: prevent contact between skin and eyes.