SEPARATION OF THESAURUS FROM IMMATURE TEA LEAVES BY MEMBRANES BASED TECHNOLOGY

Author (s) : Ms.K.Gayathri & Dr.G.Sakthivel

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Abstract :
This work describes the improved method for the production of mixture of flavonoid compounds like Catechin, Epicatechin, Epigallocatechin gallate and Epigallocatechin from camellia sinesis. After studying various production routes for these compounds, several difficulties are sorted out and more appropriate technique is adopted for the production of catechin compounds. Here, membranes of ultra-filtration range having Molecular weight cut of (MWCO) 500 and 400 are prepared and used to separate these valuable components from crude mixture of extract prepared from leaves of camellia plant. The entire extraction process is carried without using organic solvents. Extract so prepared passed through cross flow as well as batch cell membrane to get the desired mixture. The experiments are carried out at various transmembrane pressures and cross flow velocity to study the extent of flux and purity of the product. The permeate is analyzed by using HPLC to judge the quality of the product. The final product is obtained by decaffeination of permeate followed by fridge drying. The final product is analyzed by using HPLC to judge the quality which is found to be above 70 %. This 70 % purity product is then further blended with various ingredients to produce tablets by compression moulding. Pure caffeine is produced in powder form. The economic analysis shows that the said process is more economical then the existing solvent passed process.

Keywords : Catechin, membrane, solvent, caffeine, green tea

Conference Date : 30/08/2019

Pages : 263

Paper ID : 19254