PROCEDURE FOR OBTAINING THE ROSEMARY ANTIOXIDANT EXTRACT

摘要

Invention herewith described refers to the procedure for obtaining the rosemary antioxidant extract, which is characterized by the fact that this invention includes the following: grinding dried rosemary leaves and sieving to the fractions of particle size 0.3 - 0.5 mm; pre-treatment of ground plant material by supercritical carbon(IV)-oxide for one hour in the conditions of supercritical fluid extraction; continuous process of extraction with supercritical carbon(IV)-oxide at pressures of 30 MPa and higher and temperatures from 313 K to 373 K; obtaining the total extract that can be separated into antioxidant fraction and fraction of essential oils by evaporation or by using two separators in the process of supercritical extraction (conditions of separation in the first separator wherein the antioxidant fraction is extracted: 305 K, 11.5 MPa; conditions of separation in the second separator wherein the fractions of essential oils are distinguished: room temperature and atmospheric pressure.The advantage of the procedure is the reduced consumption of the supercritical carbon (IV)-oxide and corresponding energy savings achieved by adequate pre-treatment of plant material. In the phase of the plant material pre-treatment with the supercritical fluid, the ground and sifted plant material is exposed to the effects of supercritical carbon(IV)-oxide for the purpose of its swelling. The effect of the supercritical fluid on the morphological structure of the plant material, provides a so-called swelling of the plant material, and that results in a faster diffusion of the solvent with the solute in solid phase.