Production of polyhydroxyalcanoates from pulp and paper waste streams
US12162983B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Dec 12, 2019 |
| Grant date | Dec 10, 2024 |
| Priority date | — |
| Expiry date | Aug 22, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC12P2203/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for producing polyhydroxyalkanoates (PHA) is provided. The process comprises: providing a waste stream comprising lignocellulosic materials; adding an calcium-containing mineral to the waste stream; heat-treating the waste stream in the presence of the calcium-containing mineral, to obtain a treated waste stream; fermenting at least one strain of PHA-producing microorganism in a culture medium comprising the treated waste stream as a carbon source, to produce the PHA; and extracting the PHA from the PHA-producing microorganism.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.