Butadiene telomerization catalyst precursor preparation

Patent metadata

Field	Value
Publication number	US-10569262-B2
Application number	US-201415030625-A
Country	US
Kind code	B2
Filing date	Dec 4, 2014
Priority date	Dec 13, 2013
Publication date	Feb 25, 2020
Grant date	Feb 25, 2020

Abstract

Use a solvent blend that contains 1-methoxy-2,7-octadiene and an alkanols rather than the alkanols by itself to prepare a catalyst precursor suitable for use in butadiene telomerization.

First claim

What is claimed is:

1. A process for telomerizing butadiene, the process comprising: preparing a telomerization catalyst precursor used in telomerization of butadiene that comprises dissolving one equivalent of palladium acetyl acetonate and from one to three equivalents of a phosphine in a solvent blend that comprises methanol and 1-methoxy-2,7-octadiene at a temperature within a range of from 0 degrees centigrade to 100 degrees centigrade to yield a catalyst precursor solution that comprises an aryl phosphine-palladium octadienyl complex represented formulaically either as [(Ar n PR (3-n) ) x PdY] or as [(Ar n PR (3-n) ) x PdY] + wherein R is an alkyl or heteroatom-containing alkyl moiety with 1 to 12 carbon atoms, Ar is an aryl moiety or substituted aryl moiety, x=1 or 2, n=1, 2 or 3, and Y is a I-methoxy-2,7-octadiene ligand where no charge is present or octadienyl when a positive charge is present; and combining at least the telomerization catalyst precursor with butadiene to telomerize the butadiene.

2. The process of claim 1 , wherein the conditions include a temperature within a range of from 5 degrees centigrade to 60 degrees centigrade.

3. The process of any of claims 1 through 2 , wherein the number of equivalents of a phosphine is one or two.

4. The process of claim 1 , wherein the solvent blend has a 1-methoxy-2,7-octadiene content within a range of from 0.1 weight percent to 50 weight percent, based upon total solvent blend weight.

5. The process of claim 4 , wherein the solvent blend has a 1-methoxy-2,7-octadiene content within a range of from 10 weight percent to 25 weight percent, based upon total solvent blend weight.

6. The process of claim 1 , wherein the catalyst precursor solution has a palladium concentration that ranges from 0.02 weight percent to 2 weight percent, as palladium metal, based on total catalyst precursor solution weight.

7. The process of claim 6 wherein the catalyst precursor solution has a palladium concentration that ranges from 0.1 weight percent to 1 weight percent, as palladium metal, based on total catalyst precursor solution weight.

8. The process of claim 1 , wherein the telomerization catalyst precursor remains in solution for a period of at least 360 hours at a temperature within a range of from 5° C. to 60° C. and a palladium concentration exceeding 0.1 weight percent.

9. The process of claim 1 , wherein the telomerization catalyst precursor does not include butadiene.

Assignees

• Dow Global Technologies Llc

Inventors

• Launay Helene N
• Klinkenberg Jessica L
• Briggs John R
• House Sarah E
• Van Engelen Marcel C
• Wright Larry G
• Bar Georg
• Hansen Wilma
• Cabello Fuertes Julia
• Lengyel Istvan

Classifications

• C07F15/006 Primary

  Palladium compounds · CPC title

• B01J2531/824

  Palladium · CPC title

• C07C2531/24

  Phosphines · CPC title

• B01J2231/20

  Olefin oligomerisation or telomerisation · CPC title

• B01J2531/0238

  Complexes comprising multidentate ligands, i.e. more than 2 ionic or coordinative bonds from the central metal to the ligand, the latter having at least two donor atoms, e.g. N, O, S, P · CPC title