Acetic acid recovery from wood acetylation
AssigneeTricoya Technologies Ltd
InventorsBenjamin Thomas Painter, Stephen John Benstead
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Abstract
Disclosed is the integration of the production of acetic anhydride from ketene, and the acetylation of wood using acetylation fluid comprising acetic acid and acetic anhydride. The invention involves combining acetic acid obtained from distillation of acetylation fluid with a residual aqueous acetic acid stream as obtained from ketene production.
Claims15
A process for the purification of acetic acid recovered from a wood acetylation process, wherein wood acetylation fluid comprising acetic acid and acetic anhydride obtained from a wood acetylation process is subjected to acetic acid recovery by distillation, and wherein acetic acid thereby recovered is mixed in a treatment section with a residual aqueous acetic acid stream from a unit for the production of ketene from acetic acid, and the resulting mixture is directly subjected to distillation so as to produce purified acetic acid.
A system comprising a wood acetylation section, a ketene production unit and a treatment section, wherein the treatment section is configured for the recovery of acetic acid from a residual aqueous acetic acid stream, the system comprising a separation section for the separation of acetic acid obtained from the wood acetylation unit, said separation section being in fluid communication with said treatment section, and wherein said treatment section comprises a distillation unit.
Dependencies are inferred from the claim text.