PROCESS FOR THE RECOVERY OF BIOMASS

摘要

The invention relates to a process for the recovery of biomass. In accordance with the present invention the mixture comprising sulphuric acid and carbohydrates is contacted with an anion selective membrane, thus producing a sulphuric acid rich filtrate stream and a stream depleted in sulphuric acid, wherein said fresh stream of sulphuric acid is at least partly obtained from the filtrate that is obtained by said step of contacting said mixture with said anion selective membrane. Besides, said fresh stream of sulphuric acid further contains sulphuric acid that is obtained by burning HS. The invention also relates to the use of the anion selective membrane for the separation of sulphuric acid from a mixture of carbohydrates and sulphuric acid.