FORMATION OF 2,3-PENTANEDIONE FROM LACTIC-ACID OVER SUPPORTED PHOSPHATE CATALYSTS

被引：75

作者：

GUNTER, GC

MILLER, DJ

JACKSON, JE

机构：

[1] MICHIGAN STATE UNIV, DEPT CHEM ENGN, E LANSING, MI 48824 USA

[2] MICHIGAN STATE UNIV, DEPT CHEM, E LANSING, MI 48824 USA

来源：

JOURNAL OF CATALYSIS | 1994年 / 148卷 / 01期

关键词：

D O I：

10.1006/jcat.1994.1206

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Lactic acid is converted to 2,3-pentanedione, acrylic acid, and acetaldehyde in vapor-phase reactions at 0.5 MPa over phosphate salts. Highest selectivities to 2,3-pentanedione are achieved at 280-300-degrees-C and long (2-4 sec) residence times, while selectivity to acrylic acid is best at 350-degrees-C and short residence times (0.4 sec). 2,3-Pentanedione is proposed to form by a second-order condensation in the presence of phosphate, while acrylic acid is proposed to result from elimination of water via a cyclic lactic acid-phosphate transition state. (C) 1994 Academic Inc.

引用

页码：252 / 260

页数：9

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