Isomerization of light alpha-olefins to light internal olefins

Patent metadata

Field	Value
Publication number	US-9346720-B2
Application number	US-201214113829-A
Country	US
Kind code	B2
Filing date	Apr 27, 2012
Priority date	Apr 28, 2011
Publication date	May 24, 2016
Grant date	May 24, 2016

Abstract

The present invention relates to a process for isomerizing linear alpha-olefins having from 4 to 8 carbon atoms over a heterogeneous catalyst, wherein the catalyst comprises a hydrogenation metal and a selectivity promoter selected from among selenium and tellurium on a support, and also a process for preparing 1-olefins by a metathesis reaction of 2-olefins with ethene, wherein the 2-olefins are prepared by the above mentioned isomerization process.

First claim

The invention claimed is:

1. A process for isomerizing linear alpha-olefins having from 4 to 8 carbon atoms over a heterogeneous catalyst, wherein the catalyst comprises a hydrogenation metal selected from the group consisting of palladium, platinum, nickels, and mixtures thereof, and a selectivity promoter selected from the group consisting of selenium and tellurium on a support, wherein the isomerization is carried out at a temperature of from 30 to 120° C.

2. The process according to claim 1 carried out in the presence of hydrogen.

3. The process according to claim 1 , wherein the support comprises aluminum oxide (Al 2 O 3 ), silicon dioxide (SiO 2 ) or a mixture thereof.

4. The process according to claim 1 , wherein a catalyst which comprises palladium and selenium or tellurium, on a support has a surface area of from 80 to 380 m 2 /g, a pore volume of from 0.6 to 0.95 cm 3 /g and a pore diameter of from 3 nm to 300 μm, with from 80 to 95% of the pore volume being in the pore diameter range from 10 to 100 nm, is used.

5. The process according to claim 1 , wherein the catalyst comprises from 0.1 to 0.8% by weight of palladium, from 0.02 to 0.08% by weight of selenium, tellurium or a mixture of selenium and tellurium, based on the total weight of the catalyst.

6. The process according to claim 1 , wherein the isomerization is carried out at a pressure of from 4 to 35 bar.

7. The process according to claim 1 , wherein the hydrogenation metal is palladium.

8. The process according to claim 7 , wherein the palladium is in elemental form.

9. A process comprising:
a. preparing a 2-olefin by the process according to claim 1 ; and
b. preparing a 1-olefin reacting the 2-olefin with ethane in a metathesis reaction.

10. The process according to claim 9 , wherein the metathesis is carried out in the presence of a catalyst selected from the group consisting of WO 3 /SiO 2 , CoO—MoO 3 /Al 2 O 3 , Re 2 O 7 /Al 2 O 3 and mixtures thereof, or metal-organic catalysts of the Schrock or Grubbs type.

Assignees

• Iselborn Stefan
• Hesse Michael
• Makarczyk Piotr
• Basf Se

Inventors

• Iselborn Stefan
• Hesse Michael
• Makarczyk Piotr

Classifications

• C07C2521/08

  Silica · CPC title

• C07C11/10

  with five carbon atoms · CPC title

• B01J23/44

  Palladium · CPC title

• C07C2523/30

  Tungsten · CPC title

• C07C2523/882

  and cobalt · CPC title