1. Background
1, 6-hexanediol (HDO) is a white solid at room temperature，Its melting point is 43℃, boiling point is 250℃, soluble in water and ethanol, slightly soluble in hot ether, insoluble in benzene. HDO is mainly used in the production of polyurethane, unsaturated polyester, coatings, adhesives, plasticizer hardener and lubricating oil thermal stability improvers.
![The Technology of Adipic Acid to 1, 6-Hexanediol]( "The Technology of Adipic Acid to 1, 6-Hexanediol")
2. Flow Sheet
Preparation of 1, 6-hexadiol with adipic acid mainly includes two steps:
Esterification：Dimethyl adipate was synthesized by reaction of adipic acid and methanol.
Hydrogenation: 1,6-Hexanediol was synthesized by hydrogenation of dimethyl adipate.
![The Technology of Adipic Acid to 1, 6-Hexanediol]( "The Technology of Adipic Acid to 1, 6-Hexanediol")
3. Reaction Equation
![The Technology of Adipic Acid to 1, 6-Hexanediol]( "The Technology of Adipic Acid to 1, 6-Hexanediol")
4. Process Parameters and Catalyst Performance
Esterification：
![The Technology of Adipic Acid to 1, 6-Hexanediol]( "The Technology of Adipic Acid to 1, 6-Hexanediol")
Hydrogenation:
![The Technology of Adipic Acid to 1, 6-Hexanediol]( "The Technology of Adipic Acid to 1, 6-Hexanediol")
5. Advantages of the Technology
(1) Using cheap Adipic Acid as raw material to produce high value-added HDO, it has economic benefits.
(2) The technology adopts continuous esterification process, with high conversion of AA and high selectivity of DMA, which is suitable for industrial production.
(3) The conversion of DMA and the selectivity of HDO are high