Fluid catalytic cracking apparatus and methods for cracking hydrocarbons

Patent metadata

Field	Value
Publication number	US-2016129413-A1
Application number	US-201414538407-A
Country	US
Kind code	A1
Filing date	Nov 11, 2014
Priority date	Nov 11, 2014
Publication date	May 12, 2016
Grant date	—

Abstract

Methods and FCC apparatuses are provided for cracking hydrocarbons. An FCC apparatus includes a riser with a riser outlet positioned within a reactor catalyst collection area. A stripper is coupled to the reactor catalyst collection area, where the riser extends through the stripper, and where the stripper includes a stripper exterior wall. A sleeve is positioned within the stripper between the riser and the stripper exterior wall.

First claim

1 . A fluid catalytic cracking apparatus comprising:
a riser comprising a riser outlet; a reactor catalyst collection area, wherein the riser outlet is positioned within the reactor catalyst collection area; a stripper coupled to the reactor catalyst collection area, wherein the riser extends through the stripper, and wherein the stripper comprises a stripper exterior wall; and a sleeve positioned within the stripper between the riser and the stripper exterior wall.

2 . The fluid catalytic cracking apparatus of claim 1 further comprising:
a refractory material positioned between the sleeve and the stripper exterior wall.

3 . The fluid catalytic cracking apparatus of claim 1 further comprising:
a ceramic fiber blanket positioned between the sleeve and the stripper exterior wall.

4 . The fluid catalytic cracking apparatus of claim 1 further comprising:
a purge inlet positioned between the sleeve and the stripper exterior wall.

5 . The fluid catalytic cracking apparatus of claim 4 further comprising:
a steam supply fluidly coupled to the purge inlet.

6 . The fluid catalytic cracking apparatus of claim 4 further comprising:
a barrier wall affixed to the stripper exterior wall such that the barrier wall and the sleeve define a sleeve bottom gap; and
a purge outlet defined in the barrier wall.

7 . The fluid catalytic cracking apparatus of claim 1 further comprising:
a purge outlet positioned between the sleeve and the stripper exterior wall.

8 . The fluid catalytic cracking apparatus of claim 1 wherein the sleeve is affixed to the reactor catalyst collection area.

9 . The fluid catalytic cracking apparatus of claim 8 wherein the sleeve comprises a sleeve bottom end, and wherein the sleeve bottom end floats within the stripper.

10 . The fluid catalytic cracking apparatus of claim 1 further comprising:
a barrier wall affixed to the stripper exterior wall, wherein the barrier wall is positioned such that the barrier wall and the sleeve define a sleeve bottom gap.

11 . The fluid catalytic cracking apparatus of claim 1 wherein the sleeve comprises a sleeve sloped section affixed to the reactor catalyst collection area and a sleeve vertical section coupled to the sleeve sloped section, the fluid catalytic cracking apparatus further comprising:
a perforated hole defined in the sleeve sloped section.

12 . The fluid catalytic cracking apparatus of claim 1 further comprising:
a flow aid positioned between the riser and the sleeve.

13 . The fluid catalytic cracking apparatus of claim 1 wherein the reactor catalyst collection area comprises a catalyst collection area sloped wall, and wherein the sleeve comprises a sleeve sloped section affixed to the catalyst collection area sloped wall, and wherein a slope of the catalyst collection area sloped wall is within about 5 degrees of the slope of the sleeve sloped section.

14 . The fluid catalytic cracking apparatus of claim 1 further comprising:
a regenerator fluidly coupled to the stripper and to the riser, wherein the regenerator is configured to receive a catalyst from the stripper and transfer the catalyst to the riser.

15 . A fluid catalytic cracking apparatus comprising:
a riser comprising a riser outlet; a reactor catalyst collection area, wherein the riser outlet is positioned within the reactor catalyst collection area, and wherein the reactor catalyst collection area comprises a catalyst collection area sloped wall; a stripper coupled to the catalyst collection area sloped wall; and a sleeve sloped section coupled to the catalyst collection area sloped wall, wherein the sleeve sloped section extends into the stripper.

16 . The fluid catalytic cracking apparatus of claim 15 further comprising:
a sleeve vertical section coupled to the sleeve sloped section, wherein the sleeve vertical section is positioned between the riser and a stripper exterior wall.

17 . The fluid catalytic cracking apparatus of claim 16 further comprising:
a stripper gas distributor positioned between the riser and the stripper exterior wall, wherein the stripper gas distributor is configured to direct a stripping gas between the riser and the sleeve vertical section.

18 . The fluid catalytic cracking apparatus of claim 15 wherein a slope of the sleeve sloped section is within about 5 degrees of the slope of the catalyst collection area sloped wall.

19 . The fluid catalytic cracking apparatus of claim 15 further comprising:
a regenerator; and
a spent catalyst transfer line fluidly coupling the stripper to the regenerator.

20 . A method of cracking hydrocarbons comprising the steps of:
contacting a hydrocarbon stream with a catalyst in a riser at cracking conditions to produce a riser effluent; separating the riser effluent from the catalyst in a reactor catalyst separator; collecting the catalyst in a reactor catalyst collection area; and stripping hydrocarbons from the catalyst in a stripper, wherein the stripper comprises a space between a sleeve and a stripper exterior wall, the space containing a non-reactive material.

Assignees

• Uop Llc

Inventors

• Kulprathipanja Sathit
• Palmas Paolo

Classifications

• B01J8/005 Primary

  Separating solid material from the gas/liquid stream (separation processes per se B01D) · CPC title

• C10G11/05 Primary

  Crystalline alumino-silicates, e.g. molecular sieves · CPC title

• B01J2208/00752

  Feeding · CPC title

• B01J2208/00761

  Discharging · CPC title

• B01J8/34

  with stationary packing material in the fluidised bed, e.g. bricks, wire rings, baffles · CPC title