SUBCRITICAL GAS ASSISTED DRYING OF BIOPOLYMER MATERIAL

A method is provided for producing a dehydrated biopolymer powder, said method comprising the successive steps of: a) providing a filter cake comprising biopolymer material and 30 to 60 wt. % of water; b) contacting said filter cake with a pressurised gas to extract water from the filter cake, said...

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Bibliographic Details
Main Authors SMITS PETER JAN, GIUSEPPIN MARCO LUIGI FEDERICO, HOFLAND GERARD WILLEM
Format Patent
LanguageEnglish
Published 13.12.2012
Subjects
CHEMISTRY
COMPOSITIONS BASED THEREON
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
DERIVATIVES THEREOF
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
POLYSACCHARIDES
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Summary:A method is provided for producing a dehydrated biopolymer powder, said method comprising the successive steps of: a) providing a filter cake comprising biopolymer material and 30 to 60 wt. % of water; b) contacting said filter cake with a pressurised gas to extract water from the filter cake, said pressurised gas having a pressure and a temperature below the critical point of the gas; c) separating water-containing pressurised gas from the dehydrated filter cake; and d) collecting a dehydrated biopolymer powder wherein the pressurised gas has a pressure of at least 0.6 MPa (6 bar) and up to 6 MPa (60 bar), and a temperature of 10 to 40° C.
Bibliography:Application Number: US201113579054