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Kinetic studies of detergency. II. Effect of age, temperature, and cleaning time on rates of soil removal
Author(s) -
Bourne M. C.,
Jennings W. G.
Publication year - 1963
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02822457
Subject(s) - chemistry , kinetics , volumetric flow rate , flow (mathematics) , reaction rate constant , kinetic energy , thermodynamics , chromatography , analytical chemistry (journal) , mechanics , physics , quantum mechanics
The effects of variation in temperature, flow rate, cleaning time, and age were studied in a model circulation system. The results are recorded as changes in the rate constants k 1 and k 2 and changes in the relative proportions of the two soil species. The removal of tristearin in this simple system was found to proceed by two independent mechanisms, acting simultaneously. The first, named the 舠flow mechanism,舡 is dependent on time, and its rate increases with flow rate. The second, which the authors term the 舠Duprȳ mechanism,舡 is not dependent upon time and arises from the air‐detergent interface that moves over the surface. The Duprȳ effect is independent of flow rate at all rates of flow. In most of the experiments the DuprȲ mechanism accounted for about 90% of the removal of tristearin. A comparison is made between the removal of monomolecular films and thin polymolecular films. It is shown that the empirical finding of apparently simple first‐order kinetics is not inconsistent with the complex processes that remove tristearin from the surface.