Design of extraction unit for madder root

Abstract

Madder (Rubia tinctrum) is a plant growing in areas such as south east Asia, and Europe. Over the ages its root has been used for dyeing wool and natural silk fibers, but the traditional methods of dyeing suffer from some disadvantages such as the long time required for dyeing, low brightness of fibers, etc. For this reason, the extraction of coloring matters of madder root has been performed and the parameters have been experimentally optimized. In the present article, a brief explanation of the methods, and the design procedure for the extraction unit, along with other extraction conditions have been thoroughly investigated. Equilibrium data for solid-liquid in the leaching process at different temperatures as well as different solvents have been experimentally obtained. © Shiraz University.