Processes for producing a fuel from a renewable feedstock

Patent metadata

Field	Value
Publication number	US-10240099-B2
Application number	US-201715702568-A
Country	US
Kind code	B2
Filing date	Sep 12, 2017
Priority date	Oct 27, 2016
Publication date	Mar 26, 2019
Grant date	Mar 26, 2019

Abstract

Processes for the production of transportation fuel from a renewable feedstock. A catalyst is used which is more selective to hydrodeoxygenate the fatty acid side chains compared to decarboxylation and decarbonylation reactions. A gaseous mixture of carbon monoxide and hydrogen can be supplied to the conversion zone. Water may also be introduced into the conversion zone to increase the amount of hydrogen.

First claim

The invention claimed is:

1. A process for converting a renewable feedstock into a transportation fuel, the process comprising:
removing oxygen atoms from molecules having a formula C n H 2n+1 COOR in a renewable feedstock in a conversion zone under hydrogenation conditions, wherein the conversion zone comprises a catalyst configured to selectively remove oxygen from said molecules in the renewable feedstock, and wherein the catalyst comprises 2-8 wt % cobalt and 8-20 wt % molybdenum on a support, and wherein the catalyst has a higher selectivity for hydrodeoxygenation compared to decarboxylation and decarbonylation
separating liquid hydrocarbons from an effluent from said conversion zone;
isomerizing said liquid hydrocarbons to produce an isomerized effluent having a greater concentration of branched paraffins than said liquid hydrocarbons; and
fractionating said isomerized effluent to recover one or more transportation fuel streams.

2. The process of claim 1 wherein the conversion zone receives a stream of hydrogen containing gas.

3. The process of claim 2 wherein the hydrogen containing gas includes a mixture of carbon monoxide and hydrogen.

4. The process of claim 1 wherein the support of the catalyst comprises alumina and amorphous silica alumina.

5. The process of claim 1 wherein the catalyst is water tolerant.

6. The process of claim 1 wherein the catalyst is sulfided.

7. The process of claim 6 wherein the catalyst is substantially free of nickel.

8. A process for converting a renewable feedstock into a transportation fuel, the process comprising:
passing a renewable feedstock into a conversion zone under hydrogenation conditions, the conversion zone receiving a hydrogen containing gas stream comprising a mixture of hydrogen and carbon monoxide and containing a catalyst configured to selectively remove oxygen from molecules in the renewable feedstock, wherein said molecules have a formula C n H 2n+1 COOR and wherein the catalyst has a higher selectivity for hydrodeoxygenation compared to decarboxylation and decarbonylation, and wherein the catalyst comprises 2-8 wt % cobalt and 8-20 wt % molybdenum on a support;
separating liquid hydrocarbons from an effluent from said conversion zone;
isomerizing said liquid hydrocarbons to produce an isomerized effluent having a greater concentration of branched paraffins than said liquid hydrocarbons; and
fractionating said isomerized effluent to recover one or more transportation fuel streams.

9. The process of claim 8 wherein the support comprises alumina.

10. The process of claim 9 wherein the support further comprises amorphous silica alumina.

11. The process of claim 8 wherein the catalyst is sulfided.

12. A process for converting a renewable feedstock into a transportation fuel, the process comprising:
passing a renewable feedstock into a conversion zone under hydrogenation conditions, the conversion zone receiving a hydrogen containing gas stream and containing a catalyst configured to remove oxygen from molecules having a formula C n H 2n+1 COOR in the renewable feedstock, wherein the catalyst comprises between 8 to 20 wt % molybdenum and between 2 to 8 wt % cobalt on a support, wherein the support comprises alumina and amorphous silica alumina
separating liquid hydrocarbons from an effluent from said conversion zone;
isomerizing said liquid hydrocarbons to produce an isomerized effluent having a greater concentration of branched paraffins than said liquid hydrocarbons; and
fractionating said isomerized effluent to recover one or more transportation fuel streams.

13. The process of claim 12 wherein the conversion zone also receives water.

Assignees

• Uop Llc

Inventors

• Mani Krishna
• Dutta Kanchan
• Kumar Avnish
• Ray Anjan

Classifications

• C10G2400/04

  Diesel oil · CPC title

• C10L2270/026

  for diesel engines, e.g. automobiles, stationary, marine · CPC title

• C10G2300/1018

  of animal origin · CPC title

• C10G3/50

  in the presence of hydrogen, hydrogen donors or hydrogen generating compounds · CPC title

• Y02P30/20

  using bio-feedstock · CPC title