1,3-Propanediol

• Propane-1 ,3 -diol
• Trimethylene
• 1,3 -dihydroxy

Colorless liquid

Liquid

1.05 g · cm -3 ( 20 ° C)

-26 ° C

213 ° C

9 hPa ( 100 ° C)

Moderately in water (100 g · l-1 at 20 ° C)

1.4383

-480.8 KJ / mol

Template: Infobox chemical / molecular formula search available

1,3-propanediol ( PDO ) is a chemical connection. It consists of the basic structure of propane at the terminal positions are each a hydroxy group is. 1,3-propanediol is in a group of dihydric alcohols, diols.

Production

1,3-propanediol is synthetically accessible by a variety of ways. One possibility is in the hydration of acrolein with dilute sulfuric acid in the presence of hydroquinone ( prevents polymerization of acrolein ), followed by hydrogenation using Raney nickel as the catalyst.

A biochemical synthesis may be accomplished by the fermentation of glycerol by bacteria of the genus Citrobacter, Clostridium and Aerobacter.

Properties

It is a colorless liquid with a weak characteristic odor only, which boils at 213 ° C.

Use

1,3-propanediol can be used for introducing protective groups of aldehydes and ketones. From the carbonyl compound used as a derivative of 1,3- dioxane, an acetal or ketal formed. It is stable to basic conditions, and, when it is no longer needed, be cleaved by the action of Bronsted or Lewis acids in the presence of water.

The synthesis of 1,3- dioxane, itself obtained by reaction of 1,3-propanediol with formaldehyde and phosphoric acid. This reaction can also be carried out using hydrochloric acid and urotropine.