Depolymerization extraction of compounds from birch bark

摘要

The invention provides improved processes for the extraction of betulin, lupeol, betulinic acid, suberinic acids, and/or other organic compounds and compositions from birch bark. In some embodiments, the birch bark can be physically processed prior to the extraction process, which can further improve the yield of the extraction. The bark processing can include, but is not limited to, one or more of pelletizing the bark, baling the bark, pucking the bark, or compressing the bark, to a form that is more dense per volume unit than prior to the processing.