A PROCESS FOR PREPARING A BIOMEDICAL GRADE LOW NOLECULAR WEIGHT CHITOSAN

摘要

The present invention is a high-molecular weight chitosan with a deacetylation degree of 90% or more and reacted with NaBO ₃ for 30 minutes to 30 hours at a temperature of 30 to 80 ℃, washed and filtered for 1 to 3 days in an organic solvent solution The present invention relates to a chitosan molecular weight lowering and control method for producing a low molecular weight chitosan having a molecular weight of 2,000 to 10,000, including dipping, filtration and drying. It can be produced in high yield and the low molecular weight chitosan obtained has excellent whiteness and is suitable for food and medicine.