Production technology for acquiring two antioxidant agents from Rosmarinus officinalis L.

Abstract

The invention discloses a production technology employing a ultrasonic countercurrent extraction process and a membrane separation (molecular sieve) process to acquire two antioxidants from Rosmarinus officinalis L. The production technology comprises adding 30 to 85% of edible alcohol into fresh rosemary branches and leaves, carrying out a ultrasonic counter current extraction process for a mixture of the edible alcohol and the fresh rosemary branches and leaves to obtain an extracted liquid with a solid-to-liquid ratio of from 1:10 to 1:30, and carrying out a membrane separation (molecular sieve) process to separate two antioxidant agents consisting of a rosemary fat-soluble antioxidant agent (comprising carnosic acid as a representative) and a rosemary water-soluble antioxidant agent (comprising rosmarinic acid as a representative) from the extracted liquid, wherein a heating time of the extracted liquid can be reduced through the membrane separation (molecular sieve) process thus a conversion ratio of rosmarinic acid to carnosol is reduced. A content of carnosic acid in the rosemary fat-soluble antioxidant agent is increased through a CO2 supercritical extraction process. The rosemary water-soluble antioxidant agent (comprising rosmarinic acid as a representative) is separated from a liquid obtained through a concentration process under reduced pressure and a solid-liquid separation process, and a content of rosmarinic acid in the rosemary water-soluble antioxidant agent is increased through recrystallization from ethanol. The production technology has the advantages of simple processes, low energy consumption, high production efficiency, production safety, and no harmful residual solvent due to single edible alcohol usage during all production processes.

Description

Technical field: [0001] The invention belongs to the field of extraction, separation and manufacture of highly active natural antioxidant substances, and particularly designs a production process for separating and obtaining two kinds of antioxidants from the Lamiaceae plant rosemary. Background technique: [0002] Rosemary (Rosmarinus officinalis L) is a plant of the Labiatae family. It is a perennial evergreen shrub. Its origin is in Europe, North Africa and the Mediterranean coast. The main producing countries are France, Spain, Yugoslavia and Italy. Now it is widely cultivated in various countries around the world. . [0003] According to literature records, during the period of Emperor Wen of the Three Kingdoms, rosemary was introduced into my country from the Western Regions. Cao Zhi's "Fu on Rosemary" is a good proof. The Beijing Institute of Botany, Chinese Academy of Sciences successfully introduced rosemary in 1981. The plant has very low requirements on soil and...

AI Technical Summary

Problems solved by technology

Ultrasonic countercurrent technology is used to solve the problem that the fresh rosemary raw material is not easy to extract. Increasing the solid-liquid ratio of the material can obtain a higher concentration difference, which is conducive to the diffusion and dissolution of the target component, and is conducive to the process at a lower temperature environment.