Two two-unit diesel fuel hydrotreating plants - L-24-6 (started up in 1964)
and LCh-24-7 (started up in 1970) were planned to produce 900,000 and 1,20
0,000 tons/year using cold separation and a working pressure of 3-3.5 MPa i
n the system. In 1976-1979, hot separation, developed by refinery specialis
ts,* was introduced for the first time in plants of this type.