Process for conversion of acyclic C5 compounds to cyclic C5 compounds and formulated catalyst compositions used therein

Patent metadata

Field	Value
Publication number	US-10611705-B2
Application number	US-201815949104-A
Country	US
Kind code	B2
Filing date	Apr 10, 2018
Priority date	May 3, 2017
Publication date	Apr 7, 2020
Grant date	Apr 7, 2020

Abstract

Disclosed is a process for the conversion of acyclic C5 feedstock to a product comprising cyclic C5 compounds, including cyclopentadiene, and formulated catalyst compositions for use in such process. The process comprises contacting the feedstock and, optionally, hydrogen under acyclic C5 conversion conditions in the presence of a catalyst composition to form the product. The catalyst composition comprises a microporous crystalline metallosilicate, a Group 10 metal or compound thereof, a binder, optionally, a metal selected from the group consisting of rare earth metals, metals of Groups 8, 9, or 11, mixtures or combinations thereof, or a compound thereof, in combination with a Group 1 alkali metal or a compound thereof and/or a Group 2 alkaline earth metal or a compound thereof.

First claim

The invention claimed is:

1. A process for producing cyclopentadiene, the process comprising a step of contacting an acyclic C 5 feedstock with a formulated catalyst composition under acyclic C 5 conversion conditions effective to convert at least part of the acyclic C 5 feedstock to produce an effluent comprising cyclopentadiene, wherein the acyclic C 5 feedstock comprises acyclic C 5 hydrocarbons and optionally hydrogen, a light hydrocarbon or a mixture thereof, and the formulated catalyst composition consists of:
(i)a microporous crystalline metallosilicate;
(ii) a metal of Group 10 of the Periodic Table or a compound thereof, and optionally, a metal selected from the group consisting of rare earth metals, metals of Groups 8, 9, or 11 of the Periodic Table, mixtures or combinations thereof, or a compound thereof, and
(iii) a binder selected from the group consisting of one or more of silica, titania, zirconia, metal silicates of Group 1, Group 2, or Group 13 of the Periodic Table or mixtures thereof,
and additionally
(iv) an alkali metal of Group 1 of the Periodic Table, or a compound thereof; and/or
(v) an alkaline earth metal of Group 2 of the Periodic Table or a compound thereof, wherein the formulated catalyst composition is made into one or more of an extrudate, a spray dried particle, an oil drop particle, or a spherical particle, followed by impregnating the extrudate and/or particle with the Group 10 metal, and/or the optional Groups 8, 9, or 11 metals.

2. The process of claim 1 , wherein the extrudate is a shaped extrudate.

3. The process of claim 2 , wherein the shaped extrudate has a cylindrical form or a lobed form.

4. The process of claim 3 , wherein the shaped extrudate having the lobed form is a symmetrical lobed form, an asymmetrical lobed form, a symmetrical spiral lobed form or an asymmetrical spiral lobed form.

5. The process of claim 1 , wherein the microporous crystalline metallosilicate has a framework type selected from the group consisting of MWW, MFI, LTL, MOR, BEA, TON, MTW, MTT, FER, MRE, MFS, MEL, DDR, EUO, and FAU.

6. The process of claim 1 , wherein the microporous crystalline metallosilicate is a microporous crystalline aluminosilicate.

7. The process of claim 6 , wherein the microporous crystalline aluminosilicate is selected from the group consisting of zeolite beta, mordenite, faujasite, Zeolite L, ZSM-5, ZSM-11, ZSM-22, ZSM-23, ZSM-35, ZSM-48, ZSM-50, ZSM-57, ZSM-58, MCM-22 family material, and mixtures of two or more thereof.

8. The process of claim 1 , wherein the binder is selected from the group consisting of one or more of silica, titania, zirconia, calcium silicate, magnesium silicate, or mixtures thereof.

9. The process of claim 8 , wherein the binder contains less than 35 wt % clay and alumina.

10. The process of claim 1 , wherein the alkali metal is selected from the group consisting of lithium, sodium, potassium, rubidium, cesium, and mixtures of two or more thereof.

11. The process of claim 1 , wherein the alkaline earth metal is selected from the group consisting of beryllium, magnesium, calcium, strontium, barium, and mixtures of two or more thereof.

12. The process of claim 1 , wherein the metallosilicate comprises aluminum and a molar ratio of the alkali metal to aluminum is at least 1 or a molar ratio of the alkaline earth metal to aluminum is at least 1.

13. The process of claim 1 , wherein the metal of Group 10 is platinum.

14. The process of claim 1 , wherein the optional metal is a Group 11 metal selected from copper or silver.

15. The process of claim 1 , wherein the contacting occurs in one or more reactors selected from the group consisting of a fluidized bed, a moving bed, a fixed bed or a tubular reactor.

16. The process of claim 1 , wherein the formulated catalyst composition is periodically rejuvenated and/or regenerated.

17. The process of claim 1 , wherein the acyclic C 5 conversion conditions include at least a temperature of 450° C. to 650° C., a molar ratio of the optional hydrogen co-feed to the acyclic C 5 feedstock is in a range of 0.01 to 3, a molar ratio of the optional light hydrocarbon co-feed to the acyclic C 5 feedstock is in a range of 0.01 to 5, the acyclic C 5 feedstock has a partial pressure in a range of 3 psia to 100 psia at a reactor inlet (21 to 689 kPa-a), and the acyclic C 5 feedstock has a weight hourly space velocity in a range from 1 hr −1 to 50 hr −1 .

Assignees

• Exxonmobil Chemical Patents Inc

Inventors

• Iaccino Larry L
• Bao Xiaoying
• Bai Chuansheng
• Bedard Jeremy W
• Gilcrest Jocelyn A
• Lai Wenyih F

Classifications

• B01J37/0201

  Impregnation · CPC title

• C07C2521/08

  Silica · CPC title

• B01J29/44 Primary

  Noble metals · CPC title

• C07C2521/16

  Clays or other mineral silicates · CPC title

• C07C2521/04

  Alumina · CPC title