Single step conversion of ethanol to butadiene

Patent metadata

Field	Value
Publication number	US-10647625-B2
Application number	US-201715837382-A
Country	US
Kind code	B2
Filing date	Dec 11, 2017
Priority date	Feb 7, 2017
Publication date	May 12, 2020
Grant date	May 12, 2020

Abstract

A process for producing 1,3-butadiene (BD) from ethanol in a single step by s7passing a mixture containing ethanol in a gas phase over a multifunctional catalyst having a transition metal dispersion of at least 30% on a silica metal oxide support. In some examples the multifunctional catalyst comprises a silica metal oxide having a surface area of at least 200 m{circumflex over ( )}2/g. The multifunctional catalyst can include a transition metal oxide, a silica metal oxide made from a high purity silica gel, mesoporous silica and fumed silica, such as high purity SBA16, SBA15, or Davisil grade 646.

First claim

What is claimed is:

1. A method for producing 1,3-butadiene (BI)) from ethanol the method comprising:
passing a gaseous feed containing the ethanol over a multi-functional catalyst to produce the 1,3-butadiene (BD); wherein
the multifunctional catalyst comprises a silica support, said silica support comprises 1-10 wt % ZrO2 and has a Lewis Acid site concentration of 10-35 μmole/gram; and the multifunctional catalyst comprises silver (Ag) or copper (Cu) having a dispersion of at least 40% on the silica metal oxide support.

2. The process of claim 1 wherein the silica ZrO2 support comprises a silica selected from the group consisting of a high purity silica gel, mesoporous silica and fumed silica.

3. The process of claim 2 wherein the silica ZrO2 is a high purity SBA16.

4. The process of claim 2 wherein the silica ZrO2 is high purity SBA15.

5. The process of claim 2 wherein the silica ZrO2 is Davisil grade 646.

6. The process of claim 1 wherein hydrogen is added to the feed.

7. The process of claim 1 wherein the feed is 100% ethanol.

8. The process of claim 1 wherein the feed is a mixture containing at least 30% ethanol and includes water and wherein the process produces a yield that is at least 30% butadiene.

9. The process of claim 1 wherein the step of passing the feed containing ethanol in a gas phase is performed at a temperature between 200° C. and 375° C.

10. A process for producing 1,3-butadiene (BD) from ethanol in a single step, comprising the step of passing a feed containing ethanol in gas phase over a 1% Ag/4% ZrO 2 /SiO 2 -SBA-16 catalyst having a Ag dispersion of at least 40% on the SiO 2 -SBA-16 support.

11. The process of claim 10 wherein the step of passing a feed containing ethanol is performed in operating conditions including a temperature of 325° C., pressure of 1 atm, and a flow rate of 0.23 hr −1 .

12. The process of claim 10 wherein the feed contains at east 30 percent water by weight.

Assignees

• Battelle Memorial Institute

Inventors

• Dagle Vanessa
• Dagle Robert A

Classifications

• C07C2521/08

  Silica · CPC title

• C07C2523/42

  Platinum · CPC title

• C07C2523/46

  Ruthenium, rhodium, osmium or iridium · CPC title

• C07C2523/50

  Silver · CPC title

• C07C2521/06

  Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof · CPC title