Promoter effects in the Pt-catalysed oxidation of propylene glycol

被引：60

作者：

Pinxt, HHCM ^{[1
]}

Kuster, BFM ^{[1
]}

Marin, GB ^{[1
]}

机构：

[1] Eindhoven Univ Technol, Schuit Inst Catalysis, Chem Technol Lab, NL-5600 MB Eindhoven, Netherlands

来源：

APPLIED CATALYSIS A-GENERAL | 2000年 / 191卷 / 1-2期

关键词：

oxidation; selectivities; promoter effects;

D O I：

10.1016/S0926-860X(99)00304-X

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：

Oxidation of aqueous solutions of propylene glycol has been performed at 333 K, pH = 8 using Pb-, Bi- and Sn-promoted Pt/graphite catalysts. Oxidation of propylene glycol towards pyruvic acid proceeds via two pathways, one via hydroxyacetone, the second via lactic acid. Experiments, performed under oxygen mass transfer limitations to avoid de-activation by over-oxidation showed significant effects of the promoters on both activity and selectivity. The addition of Pb and Bi enhances oxidation of lactic acid resulting in higher yields of pyruvic acid. The addition of Sn leads to high selectivities for both hydroxyacetone and pyruvic acid. The effect of Sn can be explained by the formation of a Sn-diol complex, where Sn is in the Sn(IV) state. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：45 / 54

页数：10

共 26 条

[1] MASS-TRANSFER IN GAS-LIQUID SLURRY REACTORS [J].

BEENACKERS, AACM ;

VANSWAAIJ, WPM .

CHEMICAL ENGINEERING SCIENCE, 1993, 48 (18) :3109-3139

[2] 3 PHASE SLURRY REACTORS [J].

CHAUDHARI, RV ;

RAMACHANDRAN, PA .

AICHE JOURNAL, 1980, 26 (02) :177-201

[3]

CONSTANTINI M, 1982, Patent No. 2527600

[4] REGIOSELECTIVE MANIPULATION OF HYDROXYL-GROUPS VIA ORGANOTIN DERIVATIVES [J].

DAVID, S ;

HANESSIAN, S .

TETRAHEDRON, 1985, 41 (04) :643-663

[5] DEACTIVATION OF PLATINUM CATALYSTS BY OXYGEN .2. NATURE OF THE CATALYST DEACTIVATION [J].

DIJKGRAAF, PJM ;

DUISTERS, HAM ;

KUSTER, BFM ;

VANDERWIELE, K .

JOURNAL OF CATALYSIS, 1988, 112 (02) :337-344

[6]

ERLENMEYER E, 1881, CHEM BER, V14, P320

[7]

Howard JW, 1932, ORG SYNTH COLL, V1, P475

[8] ELECTROCATALYTIC OXIDATION OF 1,2-PROPANEDIOL .3. A KINETIC-ANALYSIS OF ITS OXIDATION ON PLATINUM IN ACID-MEDIUM [J].

HUSER, H ;

LEGER, JM ;

LAMY, C .

ELECTROCHIMICA ACTA, 1988, 33 (10) :1359-1365

[9]

HUSER H, 1987, 38 ISE M MAASTR NETH, P282

[10] MECHANISMS OF THE CL-ATOM-INITIATED OXIDATION OF ACETONE AND HYDROXYACETONE IN AIR [J].

JENKIN, ME ;

COX, RA ;

EMRICH, M ;

MOORTGAT, GK .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1993, 89 (16) :2983-2991

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