Patent ID: 11906244
Assignee: UOP LLC
Field: Chemical engineering (Chemistry)
Classification: CPC F | IPC F

Claim 12:
13. The apparatus according to claim 10 wherein
(i) said second heat exchange means and said first heat exchange means are adapted to heat said distillation vapor stream to form a heated distillation. vapor stream, thereby to supply at least a portion of said cooling of elements a and f;
(ii) a compressing and cooling means comprising a compressor and a cooler is connected to said first heat exchange means to receive said heated distillation vapor stream and compress to higher pressure and cool said heated distillation vapor stream to form a cooled compressed distillation vapor stream;
(iii) a third dividing in.eanscomprising a piping, tee is connected to said compressing and cooling means to receive said cooled compressed distillation vapor stream and divide said cooled compressed distillation vapor stream into said volatile residue gas fraction and a recycle stream;
(iv) said first heat exchange means is further connected to said third dividing means and said second heat exchange means is further connected to said first heat exchange means to receive said recycle stream and cool said recycle stream to condensation to form a cooled recycle stream, thereby to supply at least a portion of said heating of element (i);
(v) a fifth expansion means comprising an expansion valve is connected to said second heat exchange means to receive said cooled recycle stream and expand said cooled recycle stream to said lower pressure to form an expanded cooled recycle stream, said fifth expansion means being further connected to said distillation column to supply said expanded cooled recycle stream to said distillation column at said top feed position; and
(vi) said combining means is adapted to be connected to said distillation column at an upper raid-column feed position, said upper mid-column feed position being bOlow said top feed position and above said mid-column feed position, thereby to supply said combined stream to said distillation column at said upper mid-column feed position.