1,2-Propanediol (1,2-Propanediol)

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1,2-Propanediol

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Propane-1,2-diol

57-55-6

C3H8O2

76.094

2905320000

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Nature Description

Colorless viscous and stable absorbent liquid, almost tasteless, odorless and flammable. Melting Point-60 ℃. Boiling point ℃, relative density 1.036(25/4 ℃), refractive index 1.4326, surface tension (20℃)38mN/m, viscosity (20℃)60.5mPa · s, specific heat capacity (20℃)2.49kJ/(kg · ℃), enthalpy of vaporization (101.3kPa)711kJ/kg, heat of combustion (25℃)1824.0kJ/mol, Flash Point (Open Cup) 99 ℃, autoignition point 415.5 ℃, critical temperature 352 ℃, critical pressure 6.1MPa. Miscible with water, ethanol and various organic solvents. It is easy to oxidize above 150℃.

1.036

187oC

-60oC

99oC

MISCIBLE

1.431-1.433

MISCIBLE

Product Applications

Used as stationary solution, solvent, anti-freeze agent, plasticizer and dehydrating agent of gas chromatography; Used as raw material of resin, plasticizer, surfactant, emulsifier and emulsion breaker, and also used as antifreeze compounds and heat carrier; propylene glycol is the intermediate of bactericide difenoconazole.; As solvent, preservative,..

Production method

1. Propylene oxide direct water method is pressurized non-catalytic hydrolysis method. It is prepared by direct hydration of propylene oxide and water at 150-160℃ and 0.78-0.98MPa. The reaction product is evaporated and rectified to obtain the finished product. 2. Propylene oxide indirect water is prepared by Indirect hydration of propylene oxide and water with sulfuric acid as catalyst. 3. Direct catalytic oxidation of propylene.