Aqueous process for recycling acetal polymer and moldings thereof
OwnerLeslie M. Blairinventor
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Abstract
This invention relates to an aqueous process for recycling polyacetal, and moldings thereof, into formaldehyde monomer solution, said process occurring at elevated temperature and pressure and in the presence of an acid decomposition catalyst, such as sulfuric acid. The resultant formaldehyde monomer solution can be reacted to form trioxane and then be cycled into a trioxane-based polyacetal manufacturing process or, alternatively, it can be further treated and then be cycled into a formaldehyde-monomer-based polyacetal manufacturing process.
Claims11
An aqueous process for recycling acetal polymer, and moldings thereof, into a formaldehyde monomer solution by heating, under pressure, a slurry of at least one acetylpolymer, water, and an acid decomposition catalyst until the acetyl polymer is dissolved, thereby resulting in a solution comprised of formaldehyde monomer.
Dependencies are inferred from the claim text.