Synthesis of 3-buten-1-ol from 1,4-butanediol over ZrO2 catalyst

✍ Scribed by Naoki Yamamoto; Satoshi Sato; Ryoji Takahashi; Kanichiro Inui

• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 313 KB
• Volume: 243
• Category: Article
• ISSN: 1381-1169
• DOI: 10.1016/j.molcata.2005.08.017

✦ Synopsis

Dehydration of 1,4-butanediol was investigated over ZrO 2 at temperatures of 325-375 • C. Modification of ZrO 2 with a small amount of sodium hydroxide greatly enhanced the selectivity to 3-buten-1-ol. Temperature-programmed desorption of adsorbed NH 3 and CO 2 elucidated acidity and basicity of the catalysts, respectively. The number of acidic sites on the ZrO 2 decreased with increasing Na content, and disappeared at Na content of 1.0 mol%, whereas the number of basic sites increased with increasing Na content. In the relationship between Na content and the selectivity to products, selectivities to tetrahydrofuran and ␥-butyrolactone simply increased with the number of acidic and basic sites, respectively. However, the selectivity to 3-buten-1-ol was maximized at an appropriate Na content. 3-Butan-1-ol is possibly formed by acid-base-concerted catalysis of monoclinic ZrO 2 in the dehydration of 1,4-butanediol.