Process For Regenerating Catalyst Particles

Patent metadata

Field	Value
Publication number	US-2016175832-A1
Application number	US-201514869235-A
Country	US
Kind code	A1
Filing date	Sep 29, 2015
Priority date	Dec 18, 2014
Publication date	Jun 23, 2016
Grant date	—

Abstract

A process for regenerating catalyst particles is disclosed. The process includes the steps: (a) withdrawing a regeneration zone effluent comprising halogen from a regeneration zone, wherein the regeneration zone contains catalyst particles comprising halogen; (b) contacting a first portion of the regeneration zone effluent with adsorbent in a first adsorption zone, removing halogen from the first portion of the regeneration zone effluent, and withdrawing from the first adsorption zone a first adsorption zone effluent; (c) contacting the first adsorption zone effluent with a water removing material to create a first water-depleted stream; and (d) passing the first water-depleted stream to the regeneration zone. Other embodiments include different orders of the steps.

First claim

What is claimed is:

1 . A process for regenerating catalyst particles, the process comprising:
withdrawing a regeneration zone effluent comprising halogen from a regeneration zone, wherein the regeneration zone contains catalyst particles comprising halogen; contacting a first portion of the regeneration zone effluent with adsorbent in an adsorption zone, removing halogen from the first portion of the regeneration zone effluent, and withdrawing from the adsorption zone an adsorption zone effluent; contacting the adsorption zone effluent with a water removing material to create a first water-depleted stream; and passing at least a portion of the first water-depleted stream to the regeneration zone.

2 . The process of claim 1 wherein step (b) further comprises:
contacting the first portion of the regeneration zone effluent with a second water removing material before contacting the first portion of the regeneration zone effluent with adsorbent in the adsorption zone.

3 . The process of claim 1 wherein the water removing material comprises a membrane selectively permeable to water.

4 . The process of claim 1 wherein feed flow of the adsorption zone effluent is tangential to a surface of the water removing material.

5 . The process of claim 1 wherein the water removing material comprises a fluorocarbon having sulfonic acid groups.

6 . The process of claim 1 wherein the water removing material comprises tetrafluoroethylene-perfluoro-3,6-dioxa-4-methyl-7-octenesulfonic acid copolymer.

7 . The process of claim 1 wherein the water removing material is in a membrane form, a tubular form, or a bead form.

8 . The process of claim 1 wherein the water removing material is in a bead form and the beads are housed in two vessels.

9 . The process of claim 8 wherein a first vessel is in active drying mode and a second vessel is in regeneration mode.

10 . The process of claim 9 wherein after a period of time the first vessel is adjusted to operate in regeneration mode and the second vessel is adjusted to operate in active drying mode.

11 . The process of claim 1 wherein the water removing material is regenerated through contact with a hot dry gas.

12 . The process of claim 1 wherein the adsorption zone is spaced apart from the regeneration zone.

13 . A process for regenerating catalyst particles, the process comprising:
withdrawing a regeneration zone effluent comprising halogen from a regeneration zone, wherein the regeneration zone comprises catalyst particles comprising halogen; contacting a first portion of the regeneration zone effluent with a water removing material to create a first water-depleted stream; contacting the first water-depleted stream with adsorbent in an adsorption zone, removing halogen from the first water-depleted stream, and withdrawing from the adsorption zone an adsorption zone effluent; and passing at least a portion of the adsorption zone effluent to the regeneration zone.

14 . A process for adsorbing hydrogen chloride (HCl) from a regeneration vent gas, the process comprising:
cooling the regeneration vent gas from a regeneration zone; passing the cooled regeneration vent gas to an adsorption zone that is spaced apart from the regeneration zone; adsorbing HCl from the regeneration vent gas onto a spent catalyst in the adsorption zone to enrich the spent catalyst with HCl to provide HCl-rich catalyst and deplete HCl from the regeneration vent gas to provide HCl-lean regeneration vent gas; purging the HCl-lean regeneration vent gas as an effluent gas; removing water from the regeneration vent gas or the HCl-lean regeneration vent gas by contacting with a water removing material; and passing the HCl-rich catalyst to the regeneration zone.

15 . The process of claim 14 wherein the water removing material is within the adsorption zone.

16 . The process of claim 14 wherein the water removing material comprises a membrane selectively permeable to water.

17 . The process of claim 14 wherein feed flow of the first portion of the regeneration zone effluent is tangential to a surface of the water removing material.

18 . The process of claim 14 wherein the water removing material comprises a fluorocarbon having sulfonic acid groups.

19 . The process of claim 14 wherein the water removing material comprises tetrafluoroethylene-perfluoro-3,6-dioxa-4-methyl-7-octenesulfonic acid copolymer.

20 . The process of claim 14 wherein the water removing material is in a membrane form, a tubular form, or a bead form.

21 . A process for regenerating catalyst particles, the process comprising:
(a) withdrawing a regeneration zone effluent comprising halogen from a regeneration zone, wherein the regeneration zone contains catalyst particles comprising halogen; (b) contacting a first portion of the regeneration zone effluent with a water removing material to create a first water-depleted stream; and (c) passing the first water-depleted stream to the regeneration zone, and at least partially regenerating at least a portion of the catalyst particles in the regeneration zone and removing at least a portion of the halogen from the catalyst particles in the regeneration zone.

22 . The process of claim 21 further comprising:
(d) contacting a second portion of the regeneration zone effluent with adsorbent in an adsorption zone, removing halogen from the second portion of the regeneration zone effluent, and withdrawing from the adsorption zone an adsorption zone effluent; and
(e) passing at least a portion of the adsorption zone effluent comprising halogen to the regeneration zone.

23 . The process of claim 22 wherein step (d) comprises:
contacting the second portion of the regeneration zone effluent with a second water removing material to create a second water-depleted stream; and
contacting the second water-depleted stream with adsorbent in the adsorption zone.

24 . The process of claim 22 wherein step (e) comprises:
contacting the adsorption zone effluent with a second water removing material to create a second water-depleted stream; and
passing the second water-depleted stream to the regeneration zone.

Assignees

• Uop Llc

Inventors

• Glover Bryan K
• Shakur Mohamed S

Classifications

• B01J38/42 Primary

  using halogen-containing material · CPC title

• C10G2300/70

  Catalyst aspects · CPC title

• B01J27/32

  of catalysts comprising compounds of halogens · CPC title

• B01J38/18

  with subsequent reactive gas treating · CPC title

• B01J38/26

  having mainly counter-current flow of oxygen-containing gas and material · CPC title