RESINOUS PEAL EXTRACT PRODUCING METHOD

摘要

An extract contg. increased concns. of polyphenols is prepd. from conifer bark. Dried and ground bark is extracted by an alkaline soln. in a reactor equipped with a heating jacket and agitator. The extract is filtered and stored. The cello-lignin residue is unloaded for composting. This process may be carried out in any coniferous forestry unit for efficient utilisation of some chemicals.