NZ766525B2 - Fluid catalytic cracking process and apparatus for maximizing light olefin yield and other applications - Google Patents
Fluid catalytic cracking process and apparatus for maximizing light olefin yield and other applicationsInfo
- Publication number
- NZ766525B2 NZ766525B2 NZ766525A NZ76652517A NZ766525B2 NZ 766525 B2 NZ766525 B2 NZ 766525B2 NZ 766525 A NZ766525 A NZ 766525A NZ 76652517 A NZ76652517 A NZ 76652517A NZ 766525 B2 NZ766525 B2 NZ 766525B2
- Authority
- NZ
- New Zealand
- Prior art keywords
- particles
- reactor
- catalyst
- feeding
- stream
- Prior art date
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
- B01D45/06—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by reversal of direction of flow
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
- B01D45/08—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by impingement against baffle separators
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- B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
- B01J2208/00008—Controlling the process
- B01J2208/00017—Controlling the temperature
- B01J2208/00327—Controlling the temperature by direct heat exchange
- B01J2208/00336—Controlling the temperature by direct heat exchange adding a temperature modifying medium to the reactants
- B01J2208/00353—Non-cryogenic fluids
- B01J2208/00362—Liquid
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- B01J2208/00008—Controlling the process
- B01J2208/00017—Controlling the temperature
- B01J2208/00327—Controlling the temperature by direct heat exchange
- B01J2208/00336—Controlling the temperature by direct heat exchange adding a temperature modifying medium to the reactants
- B01J2208/0038—Solids
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- B01J2208/00743—Feeding or discharging of solids
- B01J2208/00752—Feeding
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- B01J2208/00761—Discharging
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- B01J2208/00991—Disengagement zone in fluidised-bed reactors
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- B01J29/00—Catalysts comprising molecular sieves
- B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/40—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively
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- C07C2/862—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation between a hydrocarbon and a non-hydrocarbon the non-hydrocarbon contains only oxygen as hetero-atoms
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- C10G55/06—Treatment of hydrocarbon oils, in the absence of hydrogen, by at least one refining process and at least one cracking process plural serial stages only including at least one catalytic cracking step
Abstract
Apparatus and processes herein provide for converting hydrocarbon feeds to light olefins and other hydrocarbons. The processes and apparatus include, in some embodiments, feeding a hydrocarbon, a first catalyst and a second catalyst to a reactor, wherein the first catalyst has a smaller average particle size and is less dense than the second catalyst. A first portion of the second catalyst may be recovered as a bottoms product from the reactor, and a cracked hydrocarbon effluent, a second portion of the second catalyst, and the first catalyst may be recovered as an overhead product from the reactor. The second portion of the second catalyst may be separated from the overhead product, providing a first stream comprising the first catalyst and the hydrocarbon effluent and a second stream comprising the separated second catalyst, allowing return of the separated second catalyst in the second stream to the reactor.
Claims (4)
1. A process for the conversion of hydrocarbons, comprising: feeding first particles and second particles to a reactor, wherein the first particles have a smaller average particle size and/or are less dense than the second particles, and wherein the first particles and second particles may independently be catalytic or non-catalytic particles; feeding a hydrocarbon feedstock to the reactor; recovering an overhead product from the reactor comprising a converted hydrocarbon effluent, the second particles, and the first particles; separating the second particles from the overhead product to provide a first stream comprising the first particles and the converted hydrocarbon effluent and a second stream comprising the separated second particles ; returning the separated second particles in the second stream to the reactor; feeding a second hydrocarbon feedstock and a mixture of first particles and second particles to a second reactor; contacting the mixture of first and second particles with the second hydrocarbon feedstock to crack the second hydrocarbon feedstock and form a second reactor effluent comprising lighter hydrocarbons and a mixture of first and second particles; feeding the first stream and the second reactor effluent to a separator to separate the first and second particles from the lighter hydrocarbons and the converted hydrocarbon effluent; and recovering a hydrocarbon product from the separator.
2. The process of claim 1, further comprising recovering a bottoms product from the reactor comprising the second particles.
3. The process of claim 1, wherein the second reactor is a riser reactor.
4. The process of claim 2, further comprising: stripping additional hydrocarbons from the second particles in the reactor and feeding the stripped particles to a regenerator; and feeding the separated first and second particles recovered from the separator to the regenerator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NZ792307A NZ792307B2 (en) | 2017-09-14 | Fluid catalytic cracking process and apparatus for maximizing light olefin yield and other applications |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201662395707P | 2016-09-16 | 2016-09-16 | |
| NZ751807A NZ751807B2 (en) | 2016-09-16 | 2017-09-14 | Fluid catalytic cracking process and apparatus for maximizing light olefin yield and other applications |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| NZ766525A NZ766525A (en) | 2025-05-30 |
| NZ766525B2 true NZ766525B2 (en) | 2025-09-02 |
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