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Wolverhampton Intellectual Repository and E-Theses > School of Applied Sciences > Research Centre in Applied Sciences  > Plant and Environmental Research Group > A Novel Method for Cleaning Reaction Vessels.

Please use this identifier to cite or link to this item: http://hdl.handle.net/2436/30460
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Title: A Novel Method for Cleaning Reaction Vessels.
Authors: Cox, Jeffrey J.
Gibbons, M. N. N.
Hudson, I. D.
Williams, Craig D.
Citation: Indian Journal of Chemical Technology, 9(1): 50-53
Publisher: NISCAIR
Journal: Indian Journal of Chemical Technology
Issue Date: 2002
URI: http://hdl.handle.net/2436/30460
Additional Links: http://www.niscair.res.in/ScienceCommunication/ResearchJournals/rejour/ijct/ijctjan2k2.htm#a8a
Abstract: The objective of zeolite synthesis is the production of pure phase material and a study by Lowe et al. showed that small and possibly significant amounts of template remaining in supposedly clean vessels could influence the crystallisation of subsequent gels. Two cleaning methods are widely used to clean the synthesis reaction vessels i.e. hydrofluoric acid or a solution of sodium hydroxide at reaction temperature, but their efficacy has not been tested. Zeolite omega was synthesized with both organic and inorganic templates and, following synthesis, the reaction vessels were cleaned by a novel method, described here, using hydrofluoric acid, crown ethers, and ultrapure water. This new method was compared to the standard methods by using a ‘scavenging gel’ to test the cleanliness of the vessels. The ‘scavenging gel’ produced some crystalline material when used following conventional cleaning whereas, when the vessels were cleaned using the method described here, the gel failed to crystallise. Conductivity measurements have proved a reliable index to the cleanliness of the reaction vessels.
Type: Article
Language: en
Keywords: Geochemistry
Zeolites
Synthesis
Reaction vessels
Cleaning
Laboratory practice
Gels, scavenging
ISSN: 0971-457X
Appears in Collections: Plant and Environmental Research Group

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