Process for separation of the cellulosic part from a polyester and cellulose composition

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United States of America

PATENT NO 12049727
SERIAL NO

17253066

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Abstract

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A process for separation of the cellulosic part from a raw material composition comprising polyester and cellulose is provided. A blend is prepared comprising a raw material composition comprising polyester and cellulose and a hydrolyzing liquor wherein the hydrolyzing liquor comprises a first mixture comprising an alkaline solution containing hydroxide ions. The hydrolyzing liquor is added to give the blend an effective alkali concentration in a range from 5 g/l to 150 g/l, wherein the effective alkali concentration is calculated as NaOH, and the hydrolyzing liquor:raw material composition ratio is from 1.5:1 up to 25:1 and keeping the blend at a temperature of 100° C. or above.

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Patent Owner(s)

Patent OwnerAddress
SODRA SKOGSAGARNA EKONOMISK FORENINGSKOGSUDDEN VÄXJÖ S-35189

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bogren, Johannes Kullavik, SE 3 13
Brelid, Harald Gothenburg, SE 6 93

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