Problem of carbonization of cellulose during the acid hydrolysis with 61% H2SO4

01 January 1970 1 1K Report

in the production of nanocellulose with H2S04 61%, how to avoid the carbonization of the cellulose

This is a well known problem with carbohydrates and sulfuric acid. I had a high school chemistry experiment (in 1965) where we dumped sulfuric into a beaker of sugar and watched a carbon worm emerge from the beaker. Since you haven't given experimental details, I can only comment on what you have given.

It would seem your choices are 1 another acid, or 2 more dilute sulfuric (it is looking for water; not sure how dilute you would need to go). In any case you have to stop the carbohydrate from being a source of water for the sulfuric.

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