Granted Patent B2

US 12,209,222 · App. 17/916,447 · Granted Jan 28, 2025

Inventors: Valavarasu Gnanasekaran (Bengaluru, IN); Pradyut Kumar Dhar (Bengaluru, IN); Kanala Raghava Krishna (Bengaluru, IN); Ramesh Kandanelli (Bengaluru, IN); Ravi Balasubramaniam (Bengaluru, IN); Bojja Ramachandra Rao (Bengaluru, IN)

Assignee: Hindustan Petroleum Corporation Limited

C10G21/16C10G67/0436C10G67/0445C10G2300/1051C10G2300/202C10G2300/4006C10G2300/4012C10G2300/44C10G2400/08C10G2400/30

Abstract

Claims (31)

1. A process for obtaining an aromatic lean stream and an aromatic rich stream from a hydrocarbon feed, the process comprising:

a) obtaining a hydrocarbon feed; and

b) contacting the hydrocarbon feed with solvents to obtain an aromatic lean stream and an aromatic rich stream, wherein the solvents are an alkyl aromatic hydrophilic polyethylene oxide and polyethylene glycol-400 (PEG-400) in a weight ratio of 1:1,

wherein the alkyl aromatic hydrophilic polyethylene oxide is selected from the group consisting of polyoxyethylene(10) octylphenyl ether and polyoxyethylene(8) octylphenyl ether.

2. The process as claimed in claim 1 , wherein the hydrocarbon feed is selected from the group consisting of kerosene, straight-run kerosene, light cycle oil, and combinations thereof.

3. The process as claimed in claim 1 , wherein the hydrocarbon feed is hydrotreated prior to contacting with the solvents to obtain a hydrotreated hydrocarbon feed with 5-15 ppm of sulfur.

4. The process as claimed in claim 1 , wherein the hydrocarbon feed and the solvents are in a weight ratio in a range of from 1:1.5 to 1:2.5.

5. The process as claimed in claim 1 , wherein the hydrocarbon feed is contacted with the solvents at a temperature in a range of from 10 to 70° C. and at a pressure in a range of from 1 to 15 barg.

6. The process as claimed in claim 1 , wherein the step (b) is repeated at least once by replacing the hydrocarbon feed with the aromatic lean stream and contacting the aromatic lean stream with the solvents to obtain the aromatic lean stream with an aromatic reduction efficiency of at least 50% with respect to the hydrocarbon feed.

7. The process as claimed in claim 1 , wherein the aromatic lean stream is subjected to hydrogenation to obtain a de-aromatized kerosene and wherein the aromatic rich stream is further treated by a process selected from the group consisting of hydrotreating, hydrocracking, and combinations thereof to obtain BTX (benzene-toluene-xylene).

8. A process for obtaining de-aromatized kerosene (DAK) from a hydrocarbon feed, the process comprising:

a) obtaining a hydrocarbon feed;

b) contacting the hydrocarbon feed with solvents to obtain an aromatic lean stream, wherein the solvents are an alkyl aromatic hydrophilic polyethylene oxide and polyethylene glycol-400 (PEG-400) in a weight ratio of 1:1; and

c) hydrogenating the aromatic lean stream to obtain de-aromatized kerosene (DAK),

wherein the hydrocarbon feed has an aromatic content in a range of 5-40 wt %, and wherein the alkyl aromatic hydrophilic polyethylene oxide is selected from the group consisting of polyoxyethylene(10) octylphenyl ether and polyoxyethylene(8) octylphenyl ether.

9. The process as claimed in claim 8 , wherein the hydrocarbon feed is selected from the group consisting of kerosene, straight-run kerosene, and combinations thereof.

10. The process as claimed in claim 8 , wherein the hydrocarbon feed is hydrotreated prior to contacting with the solvents to obtain a hydrotreated hydrocarbon feed with less than 15 ppm of sulfur.

11. The process as claimed in claim 8 , wherein the hydrocarbon feed and the solvents are in a weight ratio in a range of from 1:1.5 to 1:2.5.

12. The process as claimed in claim 8 , wherein the hydrocarbon feed is contacted with the solvents at a temperature in a range of from 10 to 70° C. and at a pressure in a range of from 1 to 15 barg.

13. The process as claimed in claim 8 , wherein the hydrocarbon feed is contacted with the solvents to obtain an aromatic lean stream having monoaromatic hydrocarbons content in a range of from 1 to 10 wt %.

14. The process as claimed in claim 8 , wherein the step (b) is repeated at least once by replacing the hydrocarbon stream with the aromatic lean stream and contacting the aromatic lean stream with the solvents to obtain the aromatic lean stream with an aromatic reduction efficiency of at least 50% with respect to the hydrocarbon feed.

15. The process as claimed in claim 8 , wherein the de-aromatized kerosene has an aromatic content in a range of from 30 to 190 ppm by weight.

16. A process for obtaining BTX (benzene-toluene-xylene) from a hydrocarbon feed, the process comprising:

a) obtaining a hydrocarbon feed;

b) contacting the hydrocarbon feed with solvents to obtain an aromatic rich stream, wherein the solvents are an alkyl aromatic hydrophilic polyethylene oxide and polyethylene glycol-400 (PEG-400) in a weight ratio of 1:1; and

c) treating the aromatic rich stream to obtain BTX,

wherein the hydrocarbon feed has an aromatic content in a range of 40-80 wt %, and wherein the alkyl aromatic hydrophilic polyethylene oxide is selected from the group consisting of polyoxyethylene(10) octylphenyl ether and polyoxyethylene(8) octylphenyl ether.

17. The process as claimed in claim 16 , wherein the hydrocarbon feed is selected from the group consisting of straight-run kerosene, light cycle oil, and combinations thereof.

18. The process as claimed in claim 16 , wherein the hydrocarbon feed is hydrotreated prior to contacting with the solvents to obtain a hydrotreated hydrocarbon feed with less than 15 ppm of sulfur.

19. The process as claimed in claim 16 , wherein the hydrocarbon feed to the solvent weight ratio is in a range of from 1:1.5 to 1:2.5.

20. The process as claimed in claim 16 , wherein the hydrocarbon feed is contacted with the solvent at a temperature in a range of from 10 to 70° C. and at a pressure in a range of from 1 to 15 barg.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (10)