Light-split reverse heat integrated

LSR (Light-Split/Reverse Heat Integration). The entire feed is fed to the low-pressure column, with the bottoms product from the low-pressure column fed into the high-pressure column. Here, heat integration is in the direction opposite to that of the mass flow. 

Figure 6.24 Heat-integrated columns, (a i Feed split binary) b) light-split reverse [binary) (e) prefractionator reverse (ternary).

Light-split reverse. Figure 6.246 shows an alternative configuration where about half of the lighter component is removed in the first column and the other half in the second column. The bottoms from the first column is a mixture of light and heavy components and is fed into the second column. The first column can be run at high pressure and the second at low pressure (direct heat integration). In the flowsheet shown,... 

---