Method and feedstock for producing hydrocarbons

Patent metadata

Field	Value
Publication number	US-10844288-B2
Application number	US-201916720901-A
Country	US
Kind code	B2
Filing date	Dec 19, 2019
Priority date	Apr 3, 2019
Publication date	Nov 24, 2020
Grant date	Nov 24, 2020

Abstract

A method for producing a cracking product comprising a mixture of hydrocarbons, a thermal cracking feedstock, a cracking product comprising a mixture of hydrocarbons, and a method for producing polymers using the cracking product are provided.

First claim

The invention claimed is:

1. A method comprising the steps of:
a) providing a thermal cracking feedstock comprising:
1-100 wt-% renewable isomeric paraffin composition of the total weight of the thermal cracking feedstock, the renewable isomeric paraffin composition comprising:
at least 60 wt-% paraffins of the total weight of the renewable isomeric paraffin composition, wherein of said paraffins 10-95 wt-% are isoparaffins, and the ratio of the wt-% amount of isoparaffins with more than three branches to the total wt-% amount of the isoparaffins is less than 0.15, and
0-99 wt-% fossil naphtha of the total weight of the thermal cracking feedstock,
the sum of the wt-% amounts of the renewable isomeric paraffin composition and of the fossil naphtha being at least 90 wt-% of the total weight of the thermal cracking feedstock; and
b) thermally cracking the thermal cracking feedstock provided in step a) to form a cracking product comprising a mixture of hydrocarbons.

2. The method according to claim 1 , wherein the thermal cracking feedstock comprises:
50-100 wt-% renewable isomeric paraffin composition of the total weight of the thermal cracking feedstock; and
0-50 wt-% fossil naphtha of the total weight of the thermal cracking feedstock.

3. The method according to claim 1 , wherein the thermal cracking feedstock comprises 50-85 wt-% renewable isomeric paraffin composition and 15-50 wt-% fossil naphtha of the total weight of the thermal cracking feedstock, and
the sum of the wt-% amounts of the renewable isomeric paraffin composition and of the fossil naphtha preferably being at least 95 wt-% of the total weight of the thermal cracking feedstock.

4. The method according to claim 1 , wherein the ratio of the wt-% amount of isoparaffins with more than three branches to the total wt-% amount of the isoparaffins in the renewable isomeric paraffin composition is less than 0.12.

5. The method according to claim 1 , wherein of the isoparaffins in the renewable isomeric paraffin composition at least 80 wt-% are in a range of carbon number C14-C18.

6. The method according to claim 1 , wherein of the total weight of the renewable isomeric paraffin composition, at least 70 wt-% are paraffins, and of the paraffins in the renewable isomeric paraffin composition, 60-95 wt-% are isoparaffins.

7. The method according to claim 1 , wherein the fossil naphtha comprises: 20-85 wt-% paraffins, 0-35 wt-% olefins, 10-30 wt-% naphthenes, and 0-30 wt-% aromatics of the total weight of the fossil naphtha, the wt-% of hydrocarbons in the fossil naphtha being at least 95 wt-% of the total weight of the fossil naphtha.

8. The method according to claim 1 , wherein the thermal cracking feedstock comprises sulfur 20-300 ppm by weight.

9. The method according to claim 1 , comprising:
conducting step b) at a coil outlet temperature (COT) selected from a range from 780° C. to 890° C.

10. The method according to claim 1 comprising:
c) subjecting at least a portion of the cracking product formed in step b) to a purification treatment to remove at least one of CO, CO 2 , or C 2 H 2 .

11. The method according to claim 1 , comprising:
d) subjecting at least a portion of the cracking product formed in step b), or at least a portion of the cracking product subjected to the purification treatment of step c), or both, to a polymerisation treatment to produce polymers.

12. The method according to claim 1 , comprising:
providing multiple thermal cracker furnaces; and
performing step b) in at least one of the multiple thermal cracker furnaces.

13. The method according to claim 12 , comprising:
obtaining cracking products from the multiple thermal cracking furnaces; and
mixing the obtained cracking products to form a combined cracking product; and
optionally subjecting at least a portion of the combined cracking product to a purification treatment to remove at least one of CO, CO 2 , or C 2 H 2 , or to a polymerisation treatment to form polymers, or to both the purification treatment and the polymerisation treatment.

14. The method according to claim 1 , comprising:
subjecting at least a portion of the cracking product to a polymerization treatment to produce polymers.

Assignees

• Neste Oyj

Inventors

• Jamieson John
• Ojala Antti

Classifications

• C10L1/04 Primary

  essentially based on blends of hydrocarbons · CPC title

• C10G9/36 Primary

  with heated gases or vapours · CPC title

• C10G9/32 Primary

  according to the "fluidised-bed" technique · CPC title

• C10G3/50 Primary

  in the presence of hydrogen, hydrogen donors or hydrogen generating compounds · CPC title

• C10G57/02

  with polymerisation · CPC title