The rectangular type chromatography with cyclic cross flow was used to separate the mixture continuously. It takes advantages of the change with temperature in the ratio of the component velocity $v_a$ and $v_b$ to deflect the vectorial flow paths of the various components a,b across an adsorbent bed and thus resolve them into individual product stream. The feed is introduced continuously into one corner of a rectangular bed made of adsorbent supported in a stainless steel frame, and the flow direction of the carrier is alternately changed at right angles simultaneously with a change in temperature of the whole system. To predict the performance of the rectangular bed, the equlibrium stage model was applied and the parameters of system were estimated by means of the moment method. When the volume of one equilibrium stage was 1 cubic centimeter, the equlibrium stage model was able to predict the separation in the rectangular type chromatography. Although the degree of separation for Benzene and Naphthalene, it was possible to separate the mixture continuously in this system. To separate the mixture effectively, the solvent flow was controlled to keep the feed in contact with the adsorbent for a long time.
