Catalytic Oxidation of Substituted Phenols in a Trickle Bed Reactor

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Title:Catalytic Oxidation of Substituted Phenols in a Trickle Bed Reactor
Creators:
Tukač, Vratislav
Hanika, Jiří
Journal or Publication Title:
Collection of Czechoslovak Chemical Communications, 62, 6, pp. 866-874
Uncontrolled Keywords:Trickle bed reactor, Substituted phenols, Catalytic wet oxidation

Abstract

The catalytic wet oxidation was studied of phenol, 2-aminophenol, salicylic acid and 5-sulfosalicylic acid performed in a laboratory trickle bed reactor. A three-phase high-pressure catalytic reactor with an inside diameter of 18 mm and length of catalytic bed of 200 mm was operated at temperatures 90-180 °C, pressures 2-7 MPa and liquid space velocity 1-10 h<sup>-1</sup>. Simultaneously, the catalytic activity and the stability of extruded active carbon black Chezacarb and active carbon Chemviron were tested. At a comparable activity, the active carbon Chemviron exhibited a greater mechanical strength and stability. The influence of phenol substituents on the oxidation conversion corresponded to their inductive effect: The electropositive amino group supported the oxidation, on the contrary, the presence of carboxy and sulfo groups on aromatic ring led to only low conversion. The complications on evaluating the experimental data are caused by the non-isothermal temperature profile along the catalyst bed, the non-ideal oxygen dissolution in aqueous solutions and especially the hydrodynamic effect of flow rate on the degree of catalyst wetting and thus on the entire effectiveness of the oxidation process.

Title:Catalytic Oxidation of Substituted Phenols in a Trickle Bed Reactor
Creators:
Tukač, Vratislav
Hanika, Jiří
Uncontrolled Keywords:Trickle bed reactor, Substituted phenols, Catalytic wet oxidation
Divisions:Life and Chemical Sciences > Institute of Organic Chemistry and Biochemistry > Collection of Czechoslovak Chemical Communications
Journal or Publication Title:Collection of Czechoslovak Chemical Communications
Volume:62
Number:6
Page Range:pp. 866-874
ISSN:0010-0765
E-ISSN:1212-6950
Publisher:Institute of Organic Chemistry and Biochemistry
Related URLs:
URLURL Type
http://dx.doi.org/10.1135/cccc19970866UNSPECIFIED
ID Code:1169
Item Type:Article
Deposited On:06 Feb 2009 17:07
Last Modified:06 Feb 2009 16:07

Citation

Tukač, Vratislav; Hanika, Jiří (1997) Catalytic Oxidation of Substituted Phenols in a Trickle Bed Reactor. Collection of Czechoslovak Chemical Communications, 62 (6). pp. 866-874. ISSN 0010-0765

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