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“FURAN NO “FURAN NO- BAKE FOUNDRY BINDERS” BAKE FOUNDRY BINDERS”

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“FURAN NO “FURAN NO- BAKE FOUNDRY BINDERS” BAKE FOUNDRY BINDERS”

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									“FURAN NO-BAKE FOUNDRY BINDERS”
When cores and molds are produced without baking or heating, it is known as “No-Bake” process. Dry sand is mixed with a liquid or powder catalyst and then mixed with a binder. The binder allows the cores and molds to solidify into a desired shape, which are then used in the metal casting process. “Furan No-Bake” is a generic term commonly used in the foundry industry. “Furan” is referred to as the binder utilized in this no-bake process. Metal casters familiar with this binder know that “Furan” is an abbreviation for Furfuryl Alcohol, but this is not common knowledge. The chemical Furan is a clear, colorless, very volatile and highly flammable liquid with a boiling point close to room temperature. It is toxic and may be carcinogenic. “Furan No-Bake” binder resins do not contain the toxic chemical Furan, but this can be confusing to government regulators or citizens. Furfural is manufactured from agricultural by-products such as corncobs, oat hulls, cottonseed hulls, rice hulls and sugar cane bagasse—renewable resources. These renewable raw materials are ground and then cooked with dilute acid. Vapors from this process are removed, condensed and refined to produce furfural. Furfural is converted by hydrogenation to produce furfuryl alcohol, which is used to produce Furan No-Bake Resins. Both furfural and furfuryl alcohol are referred to generically as furans, since they both contain the five-membered heterocyclic ring of furan. Overall, there is no furan in “Furan No-Bake” resins, only furfuryl alcohol.

Furfuryl alcohol: C5H6O2 CAS Number: 98-00-0

Furan: C4H4O CAS Number: 110-00-9


								
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