OXIDATIVE THERMOCHEMICAL DRYING PROCESS FOR CHANGING HYDROPHILIC/HYDROPHOBIC CHARACTERISTICS OF NATURAL ORGANIC SUBSTANCES

摘要

An oxidative thermochemical drying treatment of naturally occurring organic substances, to prepare a new class of hydrophobic oleophilic products, and a new class of hydrophilic oleophilic ones. The treatment comprises moistening and heating the raw materials in a thermochemical apparatus equipped with a gas flow system, in an oxidizing medium for a period of time. The efficiency of the treatment can be improved by pretreatments of the raw materials, such as by boiling in water, by soaking in acidic or alkaline solution, by mechanically expanding, by adding volatile reagents and by freezing. A special pretreatment of the raw materials with carbonate or bicarbonate results in hydrophilic oleophilic products. The series of the hydrophobic oleophilic and hydrophilic oleophilic products made from different natural substances under various oxidative thermochemical drying conditions have different characteristics and are low-cost, biodegradable, environmentally harmless and widely useful.