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United States Department of Agriculture

Agricultural Research Service

Title: Pyrolysis of Foundry Sand Resins: a Preliminary Determination of Organic Products by Mass Spectrometry

Authors
item Dungan, Robert
item Reeves Iii, James
item Francis, Barry

Submitted to: BARC Poster Day
Publication Type: Abstract Only
Publication Acceptance Date: April 27, 2004
Publication Date: April 27, 2004
Citation: Dungan, R.S., Reeves III, J.B., Francis, B.A. 2004. Pyrolysis of foundry sand resins: a preliminary determination of organic products by mass spectrometry [abstract]. BARC Poster Day.

Technical Abstract: Pyrolysis-gas chromatography-mass spectrometry (Py-GC-MS) was used to identify the major organic products produced by pyrolysis of three foundry sand resins: 1) Phenolic Urethane Cold-Box, 2) Novolac (both phenol-formaldehyde based resins), and 3) Furan Warm-Box (furfuryl alcohol based resin). These resins are used in the metal casting industry as a 'sand binder' for making cores (used to produce cavities in molds) and molds for non-ferrous castings. During the casting process, the cores and molds are subjected to intense heat from the molten metal, which can reach temperatures as high as 1400oC. As a result, the organic resins undergo thermal degradation and produce a number of complex organic compounds that can be found in the spent foundry sands. Some of the organics tentatively identified by MS in the pyrolysates (after pyrolysis at 750oC) were o- and p-cresol, dimethylphenol, dimethylbenzaldehyde, isopropyl methylbenzene, phenol, trimethylphenol, 9H-xanthene, and o-xylene. Because there is interest in beneficially reusing spent foundry sands in manufactured soils and other agricultural products, it is necessary that these organic products be identified to ensure environmental protection.

Last Modified: 4/18/2014
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