Patents
US 12759958 B2: Methods of plastic recycling using highly efficient organocatalysts
- Granted
- 2026-10-13
- Filed
- 2023-01-13 application 18096849
- Type
- Utility · 13 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A method of deconstructing polymer waste into at least one useful breakdown product, wherein the polymer waste contains at least one condensation polymer, the method comprising contacting the polymer waste with a catalyst comprising an organic nitrogen-containing base and a carboxylic acid or ester thereof, in the presence of a protic molecule selected from alcohols, diols, polyols, and amines, at an elevated temperature effective for inducing alcoholysis or aminolysis of the condensation polymer, wherein the useful breakdown products comprise monomer species capable of being polymerized, and the organic nitrogen-containing base has the following structure: wherein: R1, R2, R3, R4, R5, and R6 are independently selected from hydrogen atom, electron pair, and alkyl groups containing one to three carbon atoms, and wherein any adjacent two of R1, R2, R3, R4, R5, and R6 may optionally interconnect to form a five, six, or seven-membered ring.
Source: PTBLXML, file of 2026-10-13 (ipgb20261013.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| UT-Battelle, LLC 1,197 patents | US company or organization | Oak Ridge, TN | UT-BATTELLE, LLC State business registration EXACT high confidence: identical full name and state | PTBLXML, file of 2026-10-13 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Tomonori Saito | Knoxville, TN | 31 | PTBLXML, file of 2026-10-13 | |
| Md Arifuzzaman | Knoxville, TN | PTBLXML, file of 2026-10-13 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| C07C | Acyclic or carbocyclic compounds | C07C37/0555 | PTBLXML, file of 2026-10-13 |
| B01J | Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus | B01J31/0251 | PTBLXML, file of 2026-10-13 |
| C08J | Working-up; general processes of compounding; after-treatment not covered by subclasses c08b, c08c, c08f, c08g or c08h | C08J11/24 | PTBLXML, file of 2026-10-13 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
No recorded assignments or security interests on file for this patent.
USPTO bulk data: PatentsView granted patents, disambiguated (PVGPATDIS) for patents, assignees, inventors, places and CPC categories; the USPTO Patent Assignment Dataset (ECORSEXC) for assignments and security interests. Patents filed in the last 20 years. No claims or full text. Links to other records are by name (and state): EXACT means the identical full name and state; FUZZY means a looser name match, with the confidence shown.