Methods for the decomposition of contaminated plastic waste
OwnerJia Yun Yao, Yu Wen Wang +4inventors
InventorsJia Yun Yao, Yu Wen Wang, Tapaswy Muppaneni, Ruja Shrestha, Jennifer Le Roy, Garret D. Figuly
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Abstract
This invention relates to the field of contaminated plastic waste decomposition. More specifically, the invention comprises methods and systems to decompose contaminated plastic waste and transform it into value-added products.
Claims51
A method for decomposing plastic waste, comprising:
- a. adding plastic waste to a reaction vessel;
- b. adding aqueous nitric acid (HNO3) to the reaction vessel to give a mixture, wherein the wt. ratio of plastic waste to aqueous nitric acid is greater than 1:3;
- and
- c. subjecting the mixture obtained in b. to conditions effective to decompose the plastic waste to produce decomposition products, wherein the decomposition products comprise:
- i. succinic acid, glutaric acid, adipic acid, pimelic acid, and azelaic acid;
- ii. at least one of oxalic acid, suberic acid, sebacic acid, undecanedioic acid, dodecanedioic acid, tridecanedioic acid, tetradecanedioic acid, pentadecanedioic acid, 2-octenedioic acid, 2-nonenedioic acid, 2-decenedioic acid, and 2-undecenedioic acid, or the salts or esters thereof;
- or at least one of C8-C20 dicarboxylic acid substituted with a single nitro group, or the salts or esters thereof;
- and
- iii. at least one anhydride of (i) and (ii).
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A composition, comprising:
- a. succinic acid, glutaric acid, adipic acid, pimelic acid, and azelaic acid, or the salts or esters thereof;
- and
- b. at least one of oxalic acid, suberic acid, sebacic acid, undecanedioic acid, dodecanedioic acid, tridecanedioic acid, tetradecanedioic acid, pentadecanedioic acid, 2-octenedioic acid, 2-nonenedioic acid, 2-decenedioic acid, and 2-undecenedioic acid, or the salts or esters thereof;
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- at least one anhydride of (a) and (b).
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A composition, comprising:
- a. succinic acid, glutaric acid, adipic acid, pimelic acid, and azelaic acid, or the salts or esters thereof;
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- b. at least one C8-C20 dicarboxylic acid substituted with a single nitro group, or the salts or esters thereof;
- and
- at least one anhydride of (a) and (b).
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Dependencies are inferred from the claim text.