Dimerization of cyclopentadiene from side stream from debutanizer
A system and a process for dimerizing cyclopentadiene (CPD) including producing a C 6 +C 7 rich bottoms stream and a C 5 rich side draw from a debutanizer, where the C 5 rich side draw and at least a portion of the C 6 +C 7 rich bottoms stream are directed to a dimerizer where the CPD is thermally dimerized to dicyclopentadiene (DCPD). DCPD is more stable than CPD and thus safer to handle.
1. A system for dimerizing cyclopentadiene (CPD), the system comprising:
a debutanizer comprising:
a feed of C 4 -C 7 hydrocarbons;
a C 4 hydrocarbons overhead stream;
a C 6 +C 7 hydrocarbons rich bottoms stream; and
a C 5 hydrocarbons rich side draw comprising cyclopentadiene; and
a dimerizer comprising:
a feed from the C 5 hydrocarbons rich side draw comprising cyclopentadiene;
a feed from at least a portion of the C 6 +C 7 hydrocarbons rich bottoms stream;
and a pyrolysis gasoline bottoms product stream.
2. The system of claim 1 , wherein the dimerizer is a thermal dimerizer.
3. The system of claim 1 , wherein a C 6 -C 7 hydrocarbons rich tar solvent makeup stream is drawn from the C 6 +C 7 hydrocarbons rich bottoms stream and a balance of the C 6 +C 7 hydrocarbons rich bottoms stream is directed to the dimerizer.
4. An ethylene plant comprising:
A system for dimerizing cyclopentadiene (CPD), the system comprising:
a debutanizer comprising:
a feed of C 4 -C 7 hydrocarbons;
a C 4 hydrocarbons overhead stream;
a C 6 +C 7 hydrocarbons rich bottoms stream; and
a C 5 hydrocarbons rich side draw comprising cyclopentadiene; and
a dimerizer comprising:
a feed from the C 5 hydrocarbons rich side draw comprising cyclopentadiene;
a feed from at least a portion of the C 6 +C 7 hydrocarbons rich bottoms stream;
and a pyrolysis gasoline bottoms product stream.
5. The ethylene plant of claim 4 , wherein the dimerizer is a thermal dimerizer.
6. The ethylene plant of claim 4 , wherein a C 6 -C 7 hydrocarbons rich tar solvent makeup stream is drawn from the C 6 +C 7 hydrocarbons rich bottoms stream and a balance of the C 6 +C 7 hydrocarbons rich bottoms stream is directed to the dimerizer.