Conversion of oxygenates to aromatics

Patent metadata

Field	Value
Publication number	US-2016176776-A1
Application number	US-201514956446-A
Country	US
Kind code	A1
Filing date	Dec 2, 2015
Priority date	Dec 22, 2014
Publication date	Jun 23, 2016
Grant date	—

Abstract

Described herein are processes for production of hydrocarbon products comprising contacting a feed comprising methanol and/or dimethyl ether with a catalyst composition, which comprises a zeolite having a constraint index from 1-12 and an active binder comprising a metal oxide with a dehydrogenation function, under conditions sufficient to form the hydrocarbon product, wherein the hydrocarbon product comprises aromatics, olefins, and/or paraffins. Also described herein are catalyst compositions comprising a zeolite having a 10-/12-membered ring framework and a microporous surface area of at least 150 m 2 /g, and from ˜1 wt % to ˜10 wt % of a zinc oxide binder, the catalyst composition having a zinc to aluminum atomic ratio from ˜0.08 to ˜8.5.

First claim

What is claimed is:

1 . A process for production of a hydrocarbon product comprising contacting a feed comprising methanol and/or dimethyl ether with a catalyst composition, which comprises a zeolite having a constraint index from 1-12 and an active binder comprising a metal oxide with a dehydrogenation function, under conditions sufficient to form the hydrocarbon product, wherein the hydrocarbon product comprises one or more of aromatics, olefins, and paraffins.

2 . The process of claim 1 , wherein the metal oxide comprises one or more of Ga 2 O 3 , CrO x , and ZnO.

3 . The process of claim 1 , wherein the contacting is performed at a temperature from about 300° C. to about 600° C.

4 . The process of claim 1 , wherein the contacting is performed at a temperature from about 400° C. to about 550° C.

5 . The process of claim 1 , wherein the contacting is performed at a pressure from about 50 kPaa to about 5000 kPaa.

6 . The process of claim 1 , wherein the contacting is performed at a pressure from about 100 kPaa to about 1040 kPaa.

7 . The process of claim 1 , wherein the zeolite comprises an MEL or MFI framework type.

8 . The process of claim 1 , wherein the zeolite has a silica to alumina molar ratio from about 20 to about 100.

9 . The process of claim 1 , wherein the zeolite has a silica to alumina molar ratio from about 40 to about 80.

10 . The process of claim 1 , wherein the catalyst composition comprises Zn in an amount from about 0.05 wt % to about 10 wt % of the catalyst composition.

11 . The process of claim 1 , wherein the catalyst composition comprises Zn in an amount from about 0.8 wt % to about 6 wt % of the catalyst composition.

12 . The process of claim 1 , wherein the catalyst composition comprises the active binder in an amount from about 0.5 wt % to about 60 wt % of the catalyst composition.

13 . The process of claim 1 , wherein the catalyst composition comprises the active binder in an amount from about 1 wt % to about 10 wt % of the catalyst composition.

14 . The process of claim 1 , wherein the zeolite has a microporous surface area of at least 150 m 2 /g.

15 . The process of claim 1 , wherein the catalyst has a zinc to aluminum atomic ratio from about 0.08 to about 8.5.

16 . The process of claim 1 , wherein the zeolite comprises ZSM-5.

17 . The process of claim 1 , wherein the zeolite is H-ZSM-5.

18 . The process of claim 16 , wherein the ZSM-5 has an average crystal size less than or equal to 0.5 microns.

19 . The process of claim 16 , wherein the ZSM-5 has an average crystal size less than or equal to 0.1 microns.

20 . The process of claim 1 , wherein the catalyst further comprises phosphorus.

21 . The process of claim 12 , wherein substantially all the zinc in the catalyst is present in the active binder.

22 . The process of claim 1 , wherein the hydrocarbon product has a content of aromatics and olefins that comprises at least 60 wt % of hydrocarbons in the product.

23 . The process of claim 1 , wherein the hydrocarbon product has a content of aromatics and olefins that comprises at least 70 wt % of hydrocarbons in the product.

24 . The process of claim 1 , wherein the hydrocarbon product has a content of paraffins that comprises less than 40 wt % of hydrocarbons in the product.

25 . A catalyst composition comprising:
a zeolite having a 10-membered or 12-membered ring framework and a microporous surface area of at least 150 m 2 /g; and an active binder comprising zinc oxide in an amount from about 1 wt % to about 10 wt % of the catalyst composition, the catalyst composition having a zinc to aluminum atomic ratio from about 0.08 to about 8.5.

26 . The catalyst composition of claim 25 , wherein the zeolite has a silica to alumina molar ratio from about 20 to about 100.

27 . The catalyst composition of claim 25 , wherein the zeolite comprises ZSM-5.

28 . The catalyst composition of claim 25 , wherein the catalyst further comprises phosphorus.

29 . The catalyst composition of claim 25 , wherein which all of the zinc in the composition is in the active binder.

Assignees

• Ilias Samia
• Loveless Brett
• Mccarthy Stephen J
• Vijay Rohit
• Exxonmobil Res & Eng Co

Inventors

• Ilias Samia
• Loveless Brett
• Mccarthy Stephen J
• Vijay Rohit

Classifications

• B01J35/45

  Nanoparticles · CPC title

• C07C2529/40

  of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11 · CPC title

• B01J29/405

  containing rare earth elements, titanium, zirconium, hafnium, zinc, cadmium, mercury, gallium, indium, thallium, tin or lead · CPC title

• C07C1/20 Primary

  starting from organic compounds containing only oxygen atoms as heteroatoms · CPC title

• Y02P30/20

  using bio-feedstock · CPC title