Processes for obtaining substances from bark and a composition containing bark for use in the processes
AssigneeKat2Biz AB
InventorsJoseph Samec, Ivan Kumaniaev
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Abstract
Processes for obtaining substances from bark, especially bark high in suberin and lignin, which substances can be used for preparing biofuels are disclosed. The processes use a solvent system for dissolving the substances, which system can be recycled in the process. The solvent system comprises a base selected from tertiary aliphatic amines A composition comprising bark and the solvent system, which can be used in the processes, is also disclosed.
Claims20
A process for at least partly dissolving bark containing a suberin component in a solvent system and for at least partly depolymerizing the suberin component, the process comprising the following steps:
- providing bark;
- providing a solvent system comprising water and a base selected from tertiary aliphatic amines;
- treating the bark with the solvent system by subjecting the bark to the solvent system at a temperature of at least 160° C., thereby obtaining a composition containing at least partly dissolved substances of bark, of which substances the suberin component is at least partly depolymerized.
A process for preparing a fuel, comprising the following steps:
- providing bark containing a suberin component;
- providing a solvent system comprising water, an alcohol, and a base selected from tertiary aliphatic amines;
- treating the bark with the solvent system by subjecting the bark to the solvent system at a temperature of at least 160° C., thereby obtaining a composition containing at least partly dissolved substances of bark, of which substances the suberin component is at least partly depolymerized;
- subjecting the composition resulting from the treatment step to filtration, so as to separate from the composition any solid bark residues;
- separating by evaporation the solvent system from the filtrate obtained in the filtration step, so as to obtain a product mixture;
- and
- hydrotreating the product mixture, thereby obtaining a fuel.
A composition comprising a mixture of bark in a solvent system, the solvent system comprising:
- water at a content of at least 40% by volume;
- triethylamine at a content of 4-20% by volume;
- and
- methanol at a content of 40-50% by volume,
- of the total volume of the solvent system.
Dependencies are inferred from the claim text.