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The hydrolysis of a monolayer of di-2-ethylhexyl-phthalate, adsorbed on various atmospheric model aerosol materials.

Die Hydrolyse einer Monoschicht von Di-2-ethylhexyl-phthalat, adsorbiert an verschiedenen atmosphärischen Modell-Aerosolmaterialien
 
: Behnke, W.; Nolting, F.; Zetzsch, C.

Journal of Aerosol Science 18 (1987), pp.853-856
ISSN: 0021-8502
English
Journal Article
Fraunhofer ITA ( ITEM) ()
Al2O3; Aluminiumoxid; Flugasche; heterogene Hydrolyse; Kohlekraftwerk; Phthalsäure; Siliziumdioxid; SiO2; Weichmacher

Abstract
A hydrolysis of di-(2-ethylhexyl-)phthalate (DEHP) is observed to occur, when this compound is adsorbed on highly disperse powders of Al203, Fe2O2 and TiO2, leading to initial half-lives of DEHP ranging from less than one to 30 days. The decay is self-inhibited, and it slows down to half-lives ranging from 4 to 140 d. No hydrolysis can be detected with fly ash from a coal power plant and with SiO2 (Aerosil). Mono-(2-ethylhexyl-)-phtalate (MEHP) is observed to be an intermediate, the hydrolysis of MEHP is observed to occur with half-lives ranging from 25 to 2300 d, leading to phthalic acid as final product. (ITA)

: http://publica.fraunhofer.de/documents/PX-17656.html