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Patent Searching and Data


Title:
LIGNOSULFONATE PRODUCTION PROCESS & PRODUCT
Document Type and Number:
WIPO Patent Application WO2005062800
Kind Code:
A3
Abstract:
A plant for producing lignosulfonate as a co-product of alcohol, sugar or pulp production receives a feed stream of derived from plant waste and applies electrodialysis to produce a specialty lignosulfonate. The product may be a low-chloride product from vinasse for use as a cement- condition, a demineralized product stream that resists corrosion, crystallization or scaling of downstream process equipment, or other demineralized product wherein the species removal is tailored to an intended use. The electrodialysed feed stream is preferably dewatered by a step such as nanofiltration which may also further reduce its mineral content, allowing a high grade lignosulfonate product to be produced at a commercial valuable solids concentration above about 50% with a smaller sized evaporator or other concentrator.

Inventors:
BATCHELDER BRUCE (US)
JU ALEX (US)
DOOLAN MICHAEL (GB)
Application Number:
PCT/US2004/042521
Publication Date:
September 09, 2005
Filing Date:
December 17, 2004
Export Citation:
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Assignee:
IONICS (US)
BATCHELDER BRUCE (US)
JU ALEX (US)
DOOLAN MICHAEL (GB)
International Classes:
C07G1/00; C08L97/02; (IPC1-7): C08L97/02; C07G1/00
Foreign References:
US5961837A1999-10-05
US4293459A1981-10-06
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