# US 2019/0168196 A1 · Mesoporous zsm-22 for increased propylene production

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- Number: US 2019/0168196 A1
- Document ID: US20190168196A1
- Status: Published application
- Kind: A1
- Application number: 16/311,783
- Filed: 2017-06-24
- Published: 2019-06-06
- Earliest claimed: 2016-06-24
- Assignees: Albemarle Corporation
- Applicants: Albemarle Corporation
- Inventors: Avelino Corma CANOS; Joaquin MARTINEZ-TRIGUERO
- Web page: https://patentgrep.com/patent/US20190168196A1

## CPC

- B01J 29/7042: {TON-type, e.g. Theta-1, ISI-1, KZ-2, NU-10 or ZSM-22}
- B01J 29/40: of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively
- B01J 29/80: Mixtures of different zeolites
- B01J 35/615: {100-500 m2/g}
- B01J 35/633: {less than 0.5 ml/g}
- B01J 37/06: Washing {(B01J37/0009, B01J37/0018 take precedence)}
- C01B 39/38: Type ZSM-5
- C07C 4/06: Catalytic processes {(C07C4/025 takes precedence)}
- C10G 11/05: Crystalline alumino-silicates, e.g. molecular sieves
- B01J 2229/12: to alter the outside of the crystallites, e.g. selectivation
- B01J 2229/38: Base treatment
- C07C 2529/40: of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11
- C07C 2529/70: of types characterised by their specific structure not provided for in groups C07C2529/08 - C07C2529/65
- C10G 2400/20: C2-C4 olefins
- Y02P 20/52: using catalysts, e.g. selective catalysts
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C10G: CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION (cracking to hydrogen or synthesis gas C01B; cracking or pyrolysis of hydrocarbon gases to individual hydrocarbons or mixtures thereof of definite or specified constitution C07C; cracking to cokes C10B); RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

The present invention pertains to the use of mesoporous ZSM-22 zeolite in a process for the cracking or conversion of a feed comprised of hydrocarbons, such as, for example, that obtained from the processing of crude petroleum, to a mixture high in propylene. Further, the present invention concerns the field of fluid catalytic cracking (FCC) processes and relates to the preparation and employment of additives based on zeolites having increased mesoporosity, such as altered ZSM-22. More particularly the present invention discloses a process for improving the production of propylene in FCC units.

## Claims

### Claim 1

An FCC additive comprising ZSM-22 zeolite wherein the zeolite has been treated to increase the mesoporosity of the zeolite as measured by Vmesopore (cm3/g).

### Claim 2 (depends on 1)

The FCC additive of claim 1 wherein the treatment increases the Vmesopore (cm3/g) of the ZSM-22 by a factor of 1.5.

### Claim 3 (depends on 1)

The FCC additive of claim 1 wherein the treated ZSM-22 has a mesoporosity of at least 0.075 cm3/g measured as the Vmesopore (cm3/g).

### Claim 4 (depends on 1)

The FCC additive of claim 1 comprising ZSM-22 in an amount in the range of about 5 to about 50 wt %, based upon the weight of the particulate.

### Claim 5 (depends on 1)

The FCC additive of claim 1 further comprising a ZSM-5 zeolite in an amount in the range of about 2 to about 60 wt %, based upon the weight of the particulate.

### Claim 6 (depends on 5)

The FCC additive of claim 5 wherein the catalyst composition is a mixture of at least two particulates, at least one first particulate comprising said ZSM-22, and at least one second particulates comprising said ZSM-5 zeolite.

### Claim 7 (depends on 5)

The FCC additive of claim 5 wherein said catalyst composition comprises particles in which said ZSM-22 and ZSM-5 are present in the same particle

### Claim 8

Use of ZSM-22 zeolite wherein the zeolite has been treated to increase the mesoporosity of the zeolite as measured by Vmesopore (cm3/g) in a process of catalytic cracking organic compounds.

### Claim 9

A process for producing propylene from a hydrocarbon feedstock, said process comprising the steps of:
a. providing an FCC catalyst composition comprising a particulate, said particulate comprising ZSM-22 wherein the zeolite has been treated to increase the mesoporosity of the zeolite in the range of about 5 to about 50 wt %, based upon the weight of the particulate;
b. contacting the FCC particulate catalyst composition with the hydrocarbon feedstock, at one or more temperatures in the range of about 400 to about 650° C., with a dwell time in the range of about 0.5 to about 12 seconds.

### Claim 10 (depends on 9)

The process of claim 9 wherein the treatment increases the Vmesopore (cm3/g) of the ZSM-22 by a factor of 1.5.

### Claim 11 (depends on 9)

The process of claim 9 wherein the treated ZSM-22 has a mesoporosity of at least 0.075 cm3/g measured as the Vmesopore (cm3/g).

### Claim 12 (depends on 9)

The process of claim 9 wherein the catalyst additive further comprises a mixture of at least two particulates, at least one first particulate comprising said ZSM-22, and at least one second particulate comprising said ZSM-5 zeolite.

### Claim 13 (depends on 9)

The process of claim 9 wherein the catalyst additive further comprises particles in which said ZSM-22 and ZSM-5 are present in the same particle.

### Claim 14 (depends on 9)

A process as in claim 9 wherein contacting in b) takes place in a fluidized bed reactor