[en] The first experiment for the column having a feedback stream was successfully performed with H-D system at the TSTA. Several computer codes were arranged for simulation of this column. Slight modifications were made on the computer codes to obtain better convergence in the simulation and to consider more factors such as dead volumes and by-pass flows. Characteristics of the column having a feedback stream were studied by the simulation works with the H-D system. It was observed that flow rate and location of side stream had considerable effects on column performance. A method for determination of the flow rate and location of side stream was also discussed from the simulation results. A significant result observed from the experiment was that high purity D₂ was obtained from bottom of the column having a feedback stream; while for the column without the feedback stream, HD was a major component in the bottom stream. The effect of the feedback stream was thus experimentally verified. (author)