Propylene production using a mesoporous silica foam metathesis catalyst

Patent metadata

Field	Value
Publication number	US-2017001925-A1
Application number	US-201615190950-A
Country	US
Kind code	A1
Filing date	Jun 23, 2016
Priority date	Jul 2, 2015
Publication date	Jan 5, 2017
Grant date	—

Abstract

Embodiments of a metathesis process for producing propylene comprise providing a metathesis catalyst comprising an amorphous mesoporous silica foam impregnated with metal oxides, where the metathesis catalyst has a pore size distribution of at least 3 nm to 40 nm and a total pore volume of at least 0.700 cm 3 /g. The process further involves producing a product stream comprising propylene by contacting a feed stream comprising butene with the metathesis catalyst.

First claim

What is claimed is:

1 . A metathesis process for producing propylene comprising:
providing a metathesis catalyst comprising an amorphous mesoporous silica foam impregnated with metal oxides, where the metathesis catalyst has a pore size distribution of at least 3 nm to 40 nm and a total pore volume of at least 0.700 cm 3 /g; and producing a product stream comprising propylene by contacting a feed stream comprising butene with the metathesis catalyst.

2 . The process of claim 1 further comprising tri-block copolymer structuring agent, where the tri-block copolymer structuring agent is poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol) structure.

3 . The process of claim 2 where the metathesis catalyst catalyzes isomerization of 2-butene to 1-butene followed by cross-metathesis of 2-butene and 1-butene into a metathesis product stream comprising propylene

4 . The process of claim 3 where at least 90% of the 2-butene is converted to 1-butene via isomerization.

5 . The process of claim 1 where the pore size distribution is from at least 4 nm to 10 nm and the total pore volume is from at least 0.800 cm 3 /g to 1.5 cm 3 /g.

6 . The process of claim 1 where the metathesis catalyst has a total acidity from 0.125 mmol/g to 0.500 mmol/g, and a surface area of 400 to 500 m 2 /g.

7 . The process of claim 1 where the metal oxide is an oxide of molybdenum, rhenium, tungsten, or combinations thereof.

8 . The process of claim 1 where the metal oxide is tungsten oxide.

9 . The process of claim 8 where the metathesis catalyst has a molar ratio for silica to tungsten oxide of 1 to 50.

10 . The process of claim 8 where the metathesis catalyst comprises from 5 to 15% by weight tungsten oxide.

11 . A metathesis catalyst for producing propylene comprising an amorphous mesoporous silica foam with impregnated metal oxides, where the metathesis catalyst has a pore size distribution of at least 3 nm to 40 nm and a total pore volume of at least 0.700 cm 3 /g.

12 . The metathesis catalyst of claim 11 further comprising a tri-block copolymer structuring agent, where the tri-block copolymer structuring agent is poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol) structure.

13 . The metathesis catalyst of claim 11 where the pore size distribution is from at least 4 nm to 10 nm, and the total pore volume is from at least 0.800 cm 3 /g to 1.5 cm 3 /g.

14 . The metathesis catalyst of claim 11 where the metathesis catalyst has a total acidity from 0.125 mmol/g to 0.500 mmol/g.

15 . The metathesis catalyst of claim 11 where the metal oxide is an oxide of molybdenum, rhenium, tungsten, or combinations thereof.

16 . The metathesis catalyst of claim 11 where the metal oxide is tungsten oxide.

17 . The metathesis catalyst of claim 16 where the metathesis catalyst has a molar ratio for silica to tungsten oxide of 1 to 50.

18 . The metathesis catalyst of claim 11 where the metathesis catalyst comprises from 5 to 15% by weight metal oxide.

19 . The metathesis catalyst of claim 11 where the metathesis catalyst has a pore size ranging from 2 nm to 4 nm.

20 . The metathesis catalyst of claim 11 where the metathesis catalyst has a surface area of 400 to 500 m 2 /g.

Assignees

• Saudi Arabian Oil Co
• Univ King Fahd Pet & Minerals

Inventors

• Abudawoud Raed
• Al-Khattaf Sulaiman Saleh
• Palani Arudra
• Aitani Abdullah M
• Akhtar Mohammad Naseem
• Bhuiyan Tazul Islam
• Al-Yami Mohammed A

Classifications

• B01J37/0201

  Impregnation · CPC title

• Y02P20/52

  using catalysts, e.g. selective catalysts · CPC title

• B01J23/30

  Tungsten · CPC title

• B01J2523/74

  Rhenium · CPC title

• B01J2523/68

  Molybdenum · CPC title