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1 Prace Naukowe Instytutu Chemii i Technologii Nafty i Węgla Politechniki Wrocławskiej. Konferencje

1 2002

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Possibility of waste alcohols usage.

Klimkiewicz R., Grabowska H., Teterycz H., Syper L., Biskupski A., Rakoczy J.

Prace Naukowe Instytutu Chemii i Technologii Nafty i Węgla Politechniki Wrocławskiej. Konferencje

2002

Vol. 10, nr 57

223-227

The application of a material designated as Sn-Ce-Rh-O, used up to now for the production of gas sensors, can be used as a catalyst for primary alcohols conversion to enable obtaining ketones as bimolecular condensation products. Thus, esters and aldehydes can also be substrates. In consequence, mixtures containing various alcohols, esters, aldehydes, secondary alcohols, and hydrocarbons can be processed. The content is consistent with waste mixtures of industrial origin (cyclohexanone production). The method enables conversion of such waste fractions into fractions with ketones predominating. The multicomponent content of the ketone fractions does not hinder their further utilization. There was carried out a ketonization of a waste alcohol fraction which contained n-pentanol (54%), cyclohexanone (11%), n-butanol (11%), cyclopentanol (8%), caproic aldehyde (3%), and other components. As a catalyst, there was used a tin-cerium-rhodium components, where the molar ratio of tin dioxide to cerium dioxide was 9:1, with Rh 0.05mol%. The reaction was carried out in a typical flow reactor at a temp. of 390 under atmospheric pressure and at a load of 1.0 h-1. The condensed reaction product contained 67% ketones, including 39% ketones derived from n-pentanol: di-Bu ketone (32%), Bu Pr ketone (5%), Bu pentyl ketone (2%), cyclohexanone (10%), di-Pr ketone (5%), and others.