COMPOSITIONS COMPRISING OXIDIZED MATERIALS FOR SAND CASTING AND METHODS OF PREPARATION AND USE THEREOF
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United States of America Patent
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Issued Date -
Jan 28, 2021
app pub date -
Mar 29, 2019
filing date -
Mar 30, 2018
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Abstract
Compositions useful for green sandcasting are discussed, as well as methods of preparing and using such compositions. Binder compositions may comprise a carbonaceous material, an inorganic binding agent, and a high aspect ratio silicate, wherein at least one of the carbonaceous material or the inorganic material in the binder composition may be oxidized. For example, the inorganic binding agent may be oxidized with a ratio of ferrous iron (Fe2+) to ferric iron (Fe3+) less than 1.2. or less than 1. Green sand prepared from such binder compositions may exhibit a reduction in emissions during sandcasting.
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