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1. WO2020201614 - A METHOD AND FEEDSTOCK FOR PRODUCING HYDROCARBONS

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[ EN ]

Claims:

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 any of the preceding claims, wherein the thermal cracking feedstock comprises 50-85 wt-% renewable isomeric paraffin composition and 15-50 wt-% fossil naphtha, preferably 60-85 wt-% renewable isomeric paraffin composition and 15-40 wt-% fossil naphtha, more preferably 70-85 wt-% renewable isomeric paraffin composition and 15-30 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 preferably being at least 95 wt-%, more preferably at least 99 wt-%, of the total weight of the thermal cracking feedstock.

4. The method according to any of the preceding claims, 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, preferably less than 0.10, more preferably less than 0.05.

5. The method according to any of the preceding claims, wherein of the isoparaffins in the renewable isomeric paraffin composition at least 80 wt-%, preferably at least 85 wt-%, more preferably at least 90 wt-%, even more preferably at least 95 wt-% are in the range of carbon number C14-C18.

6. The method according to any of the preceding claims, wherein of the paraffins in the renewable isomeric paraffin composition 60-95 wt-%, preferably 60-80 wt-%, further preferably 65-70 wt-% are isoparaffins,

the renewable isomeric paraffin composition comprising paraffins preferably at least 70 wt-%, further preferably at least 80 wt-%, more preferably at least 90 wt-%, even more preferably at least 95 wt-%, of the total weight of the renewable isomeric paraffin composition.

7. The method according to any of the preceding claims, 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 preferably being at least 95 wt-%, more preferably at least 99 wt-% of the total weight of the fossil naphtha.

8. The method according to any of the preceding claims, wherein the thermal cracking feedstock comprises sulfur 20-300 ppm by weight, preferably 20-250 ppm by weight, more preferably 20-100 ppm by weight, and even more preferably 50-65 ppm by weight.

9. The method according to any of the preceding claims, wherein step b) is conducted at a coil outlet temperature (COT) selected from the range from 780 °C to 890 °C, preferably from 800 °C to 860 °C, more preferably from 800 °C to 840 °C, and even more preferably from 800 °C to 820 °C.

10. The method according to any of the preceding claims comprising the step of 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, CO2, or C2H2.

11. The method according to any of the preceding claims comprising the step of 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 any of the preceding claims, 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, CO2, or C2H2, or to a polymerisation treatment to form polymers, or to both the purification treatment and the polymerisation treatment.

14. 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 of said

isoparaffins at least 80 wt-% are in the range of carbon number C14-C18, 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 0.12, 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.

15. The thermal cracking feedstock according to claim 14, 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.

16. The thermal cracking feedstock according to claim 14 or 15, wherein the thermal cracking feedstock comprises 50-85 wt-% renewable isomeric paraffin composition and 15-50 wt-% fossil naphtha, preferably 60-85 wt-% renewable isomeric paraffin composition and 15-40 wt-% fossil naphtha, more preferably 70-85 wt-% renewable isomeric paraffin composition and 15-30 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 preferably at least 95 wt-%, more preferably at least 99 wt-%, of the total weight of the thermal cracking feedstock.

17. The thermal cracking feedstock according to any of the preceding claims 14 to

16, 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 0.10, preferably less than 0.05.

18. The thermal cracking feedstock according to any of the preceding claims 14 to 17, wherein of the isoparaffins in the renewable isomeric paraffin composition at least 85 wt-%, preferably at least 90 wt-%, more preferably at least 95 wt-%, are in the range of carbon number C14-C18.

19. The thermal cracking feedstock according to any of the preceding claims 14 to

18, wherein of the paraffins in the renewable isomeric paraffin composition 60-95 wt-%, preferably 60-80 wt-%, further preferably 65-70 wt-% are isoparaffins,

the renewable isomeric paraffin composition comprising paraffins preferably at least 70 wt-%, further preferably at least 80 wt-%, more preferably at least 90 wt-%, even more preferably at least 99 wt-%, of the total weight of the renewable isomeric paraffin composition.

20. The thermal cracking feedstock according to any of the preceding claims 14 to

19, 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 preferably being at least 95 wt-%, more preferably at least 99 wt-%, of the total weight of the fossil naphtha.

21. The thermal cracking feedstock according to any of the preceding claims 14 to

20, wherein the thermal cracking feedstock comprises sulfur 20-300 ppm by weight, preferably 20-250 ppm by weight, more preferably 20-100 ppm by weight, and most preferably 50-65 ppm by weight.

22. A cracking product comprising a mixture of hydrocarbons obtainable by a method according to any of the preceding claims 1-13, wherein the sum of the wt-% amounts of CO, CO2 and C2H2 in the cracking product is less than 1.5 wt-%, preferably less than 1.3 wt-%, more preferably less than 1.1 wt-%, even more preferably less than 0.8 wt-%, of the total weight of the cracking product.

23. A method for producing polymers, such as polypropene, polyethene, or both, using a cracking product according to claim 22.