Process for regenerating catalyst particles

Patent metadata

Field	Value
Publication number	US-9868118-B2
Application number	US-201514869235-A
Country	US
Kind code	B2
Filing date	Sep 29, 2015
Priority date	Dec 18, 2014
Publication date	Jan 16, 2018
Grant date	Jan 16, 2018

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 comprising halogens as promoters, the process comprising:
a) regenerating the catalyst in a regeneration zone by
i—removing coke deposit on the catalyst in a combustion zone and
ii—chlorinating the catalyst to replenish halogen catalytic promoters on the catalyst in a chlorination zone after the step of removing coke deposit;
to obtain a regeneration zone effluent comprising halogen
b) contacting a first portion of the regeneration zone effluent with adsorbent in an adsorption zone to remove halogen from the first portion of the regeneration zone effluent; desorbing halogen from the adsorbent to generate an adsorption zone effluent comprising the desorbed halogen; withdrawing from the adsorption zone the adsorption zone effluent comprising the desorbed halogen;
c) contacting the adsorption zone effluent comprising desorbed halogen with a water removing material to create a first water-depleted stream comprising desorbed halogen; and
d) passing at least a portion of the first water-depleted stream to the chlorination zone of step a).

2. The process of claim 1 wherein step (c) 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.

Assignees

• Uop Llc

Inventors

• Glover Bryan K
• Shakur Mohamed S

Classifications

• B01J8/26

  with two or more fluidised beds, e.g. reactor and regeneration installations · CPC title

• B01J38/42 Primary

  using halogen-containing material · CPC title

• B01J38/26

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

• B01J38/72

  including segregation of diverse particles · CPC title

• B01J27/32

  of catalysts comprising compounds of halogens · CPC title