Method and reactor for continuous extraction of...

Details Method and reactor for continuous extraction of... Method and reactor for continuous extraction of...

D - Textiles, Paper

21

C

9/28

D21C 3/20 (2006.01) C08B 37/14 (2006.01)

Patent

CA 1196155

ABSTRACT OF THE DISCLOSURE This invention relates generally to the extraction process and provides a novel process and reactor for the continuous extraction of vegetable-fibre material such as wood chips. The process comprises a two stage process, the first stage comprising an extraction process using a methanol :water mixture and the second stage using the same extraction liquid as the first with a greater proportion of water, with sodium hydroxide and anthraquinone. A part of the extraction liquid which is saturated by extraction substances is continually carried away at each stage and after extraction, The mixture is subjected to washing. This process has eliminated the heavy pollution produced by the prior art processes and also has reduced the cost and complexity of the prior art processes.

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