Process using an integrated system to continuously inject small amounts of immiscible liquid

Patent metadata

Field	Value
Publication number	US-10384198-B2
Application number	US-201816037192-A
Country	US
Kind code	B2
Filing date	Jul 17, 2018
Priority date	Nov 2, 2016
Publication date	Aug 20, 2019
Grant date	Aug 20, 2019

Abstract

A process for injecting an immiscible liquid stream comprising a co-catalyst for a hydrocarbon conversion into a larger liquid stream that is an ionic liquid catalyst for the hydrocarbon conversion, comprising:
a. feeding the immiscible liquid stream towards one or more injection quills in an additive delivery system comprising a transfer drum; b. transferring the immiscible liquid stream from the additive delivery system to the one or more injection quills in a solvent flushing system, fluidly connected downstream from the additive delivery system, wherein the solvent flushing system injects a solvent into one or more additive addition lines in the solvent flushing system; and c. continuously injecting the immiscible liquid stream into the larger liquid stream in an additive injection and mixing system comprising the one or more injection quills.

First claim

It is claimed:

1. A process for injecting an immiscible liquid stream comprising a co-catalyst for a hydrocarbon conversion into a larger liquid stream that is an ionic liquid catalyst for the hydrocarbon conversion, comprising:
a. feeding the immiscible liquid stream towards one or more injection quills in an additive delivery system comprising a transfer drum;
b. transferring the immiscible liquid stream from the additive delivery system to the one or more injection quills in a solvent flushing system, fluidly connected downstream from the additive delivery system, wherein the solvent flushing system injects a solvent into one or more additive addition lines in the solvent flushing system;
c. continuously injecting the immiscible liquid stream into the larger liquid stream in an additive injection and mixing system comprising the one or more injection quills; and
d. feeding a mixture of the immiscible liquid stream and the larger liquid stream from step c) to an alkylation reactor that performs the hydrocarbon conversion.

2. The process of claim 1 , wherein the co-catalyst is an alkyl halide.

3. The process of claim 1 , wherein the one or more injection quills increase an injection flow velocity of the immiscible liquid stream, which prevents plugging and provides mixing of the immiscible liquid stream and the larger liquid stream.

4. The process of claim 1 , wherein an injection flow velocity of the immiscible liquid stream prevents solid particles that are formed by reactions between an alkyl halide additive in the immiscible liquid stream and the ionic liquid catalyst from plugging up the one or more injection quills.

5. The process of claim 1 , wherein an injection flow velocity of the immiscible liquid stream is sufficient to prevent backflow of the larger liquid stream.

6. The process of claim 5 , wherein the injection flow velocity is from 30 to 1000 mm/s.

7. The process of claim 1 , wherein no further mixing of the immiscible liquid stream and the larger liquid stream is needed after the continuously injecting step c).

8. The process of claim 1 , wherein the solvent is injected into the one or more additive addition lines in an amount that maintains a sufficiently high injection flow velocity at tips of the one or more injection quills.

9. The process of claim 1 , wherein at least one of the one or more injection quills is operated in stand-by while at least another one of the one or more injection quills is active.

10. The process of claim 1 , wherein a stable pressure is maintained in the transfer drum and enables a steady stream of an additive to a downstream operation.

11. The process of claim 10 , wherein the downstream operation performs the hydrocarbon conversion by an acidic ionic liquid catalyst.

12. The process of claim 1 , wherein the one or more injection quills are sized to provide a ratio of a quantity, in liter/day, of an additive in the immiscible liquid stream to a second quantity, in liter/day, of the larger liquid stream, wherein the ratio of the quantity to the second quantity is from 0.001:1 to 0.1:1.

13. The process of claim 1 , wherein the one or more injection quills are oriented vertically and inject the immiscible liquid stream in a downward direction or in an upward direction, into a horizontal flow of the larger liquid stream.

14. The process of claim 1 , wherein the continuously injecting delivers a pulseless flow of the immiscible liquid stream.

15. The process of claim 1 , wherein the solvent flushing system provides cleaning of the one or more additive addition lines without disconnecting the one or more additive addition lines.

16. The process of claim 1 , further comprising additional mixing of the immiscible liquid stream and the larger liquid stream before discharging the mixture to downstream operations.

17. The process of claim 16 , wherein the additional mixing is provided by one or more of a static mixer, a vortexer, a baffle, a shaker, a nozzle, or a stirrer.

Assignees

• Chevron Usa Inc

Inventors

• Luo Huping
• Deppe Gordon R
• Butterfield Albert Eugene
• Evans Allison Amy
• Fritz Jacob

Classifications

• B01J31/0231

  Halogen-containing compounds · CPC title

• B01J2231/4205

  C-C cross-coupling, e.g. metal catalyzed or Friedel-Crafts type · CPC title

• B01J27/125

  with scandium, yttrium, aluminium, gallium, indium or thallium · CPC title

• B01J31/0284 Primary

  of an aromatic ring, e.g. pyridinium · CPC title

• B01J31/26

  containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24 · CPC title