Methods and systems for recovering dicyclopentadiene from pygas

Patent metadata

Field	Value
Publication number	US-10611703-B2
Application number	US-201616060590-A
Country	US
Kind code	B2
Filing date	Dec 6, 2016
Priority date	Dec 14, 2015
Publication date	Apr 7, 2020
Grant date	Apr 7, 2020

Abstract

Methods and systems for recovering dicyclopentadiene from pygas are provided. Methods can include heating pygas to generated heated pygas, recovering a C5 fraction from the heated pygas, and dimerizing cyclopentadiene from the C5 fraction to form dicyclopentadiene. Methods can further include recovering the C5 fraction from the pygas in a depentanizer column. Other methods can include heating pygas including dicyclopentadiene to form cyclopentadiene and hydrogenating cyclopentadiene in the pygas to form cyclopentane.

First claim

The invention claimed is:

1. A method of recovering dicyclopentadiene from pygas, the method comprising:
(a) heating the pygas to generate heated pygas;
(b) recovering a C 5 fraction from the heated pygas; and
(c) dimerizing cyclopentadiene from the C 5 fraction to form dicyclopentadiene;

wherein the heating comprises heating the pygas in a thermal reactor for about 1 to about 3 hours at a temperature of about 170° C. to about 190° C.; and
wherein the heating further comprises heating the pygas at a pressure of about 13 to about 16 bar.

2. The method of claim 1 , further comprising separating C1 through C4 hydrocarbons, if any, from the pygas prior to the heating.

3. The method of claim 1 , wherein the heating comprises heating the pygas in a thermal reactor for about 1 to about 3 hours at a temperature of about 170° C.

4. The method of claim 3 , wherein the heating further comprises heating the pygas at a pressure of about 13 bar.

5. The method of claim 1 , wherein the dicyclopentadiene is monomerized to cyclopentadiene.

6. The method of claim 1 , wherein the recovering comprises distilling a C5 stream in a depentanizer column.

7. The method of claim 1 , wherein the heating comprises feeding a stream comprising the pygas to a depentanizer column with a bottom column temperature of about 170° C. to about 190° C.

8. A method of producing cyclopentane from pygas comprising dicyclopentadiene, the method comprising:
(a) heating the pygas to form cyclopentadiene in a thermal reactor for about 1 to about 3 hours at a temperature of about 170° C. to about 190° C. at a pressure of about 13 to about 16 bar; and
(b) hydrogenating the cyclopentadiene to form cyclopentane.

9. The method of claim 1 , wherein the dicyclopentadiene is monomerized to cyclopentadiene and wherein the recovering comprises distilling a C5 stream in a depentanizer column.

10. The method of claim 1 , wherein the dicyclopentadiene is monomerized to cyclopentadiene, and wherein the heating comprises feeding a stream comprising the pygas to a depentanizer column with a bottom column temperature of about 170° C. to about 190° C.

11. The method of claim 1 , wherein the dicyclopentadiene is monomerized to cyclopentadiene, wherein the heating comprises feeding a stream comprising the pygas to a depentanizer column with a bottom column temperature of about 170° C. to about 190° C., and wherein the recovering comprises distilling a C5 stream in a depentanizer column.

12. The method of claim 1 , wherein the heating comprises feeding a stream comprising the pygas to a depentanizer column with a bottom column temperature of about 170° C. to about 190° C.

Assignees

• Sabic Global Technologies Bv

Inventors

• Abdelghani Mohamed Sabri

Classifications

• C07C7/04

  by distillation · CPC title

• C07C13/10

  with a cyclopentane ring · CPC title

• C07C2601/10

  the ring being unsaturated · CPC title

• C07C13/15

  with a cyclopentadiene ring · CPC title

• C07C5/03

  of non-aromatic carbon-to-carbon double bonds · CPC title