Telomerization of ethylene and ethanol with di-t-butyl peroxide as initiator has been carried out in autoclave and in a flow system.It has been found that when the amount of the initiator used varies from 0.75 to 3.75% (vol/vol) of the alcohol charges, the yield of the telomers increases almost linearly,and reaches 37% (wt./wt.) of the alcohol charges (in autoclave);while the efficiency of the initiator, namely, the ratio of the amount of the telomers to that of the initiator, decreases progressively.From the telomerit products all the alkanols of even carbon atoms from butanol-2 to hexadecanol-2 have been separated and identified.