Process for recovering salt during a lignocellulosic conversion process

摘要

The present invention relates to a process for generating steam and recovering salts during a lignocellulosic conversion process. The process comprises de-salting a still bottoms stream; incinerating a stream comprising lignin and the de-salted still bottoms stream in an incinerator; and utilizing the heat generated from said incinerating to produce steam. Further provided is a process that comprises feeding a concentrated still bottoms stream to a crystallizer and forming insoluble solids therein comprising salts. Furthermore, the invention relates to a process for recovering salts from a lignocellulosic conversion process, which process comprises the addition of solvent to a still bottoms stream to precipitate salts therefrom. Also provided is a still bottoms composition, a fertilizer product and a composition for incineration.

主权项

1. A process for generating steam and recovering salts during a lignocellulosic conversion process, said process comprising the steps of:
obtaining a liquid-containing stream comprising lignin and a separate liquid still bottoms stream generated during the lignocellulosic conversion process; (ii) removing at least a portion of the water from the still bottoms stream to produce a liquid-containing concentrated still bottoms stream; (iii) removing at least a portion of the salts from the liquid concentrated still bottoms stream to produce a liquid-containing de-salted still bottoms stream; (iv) introducing both the liquid-containing stream comprising lignin and the liquid-containing de-salted still bottoms stream to an incinerator and incinerating the same; and (v) utilizing heat generated from said incinerating to produce steam.