Reduced h2 consumption during deoxygenation

Patent metadata

Field	Value
Publication number	US-2024218259-A1
Application number	US-202318393152-A
Country	US
Kind code	A1
Filing date	Dec 21, 2023
Priority date	Dec 29, 2022
Publication date	Jul 4, 2024
Grant date	—

Abstract

Systems and methods are provided for reducing hydrogen consumption during deoxygenation of bio-derived (or at least partially bio-derived) feedstocks. The reduced hydrogen consumption is achieved by performing the deoxygenation in the presence of a bulk multimetallic catalyst and/or in the presence of a base metal dewaxing catalyst having reduced metal stack heights. Additionally, due in part to being able to reduce or minimize hydrogen consumption, the heat release during deoxygenation can also be reduced, thus allowing a smaller catalyst volume to perform deoxygenation.

First claim

1 . A method for processing a bio-derived feedstock, comprising:
exposing a feed comprising a bio-derived feedstock, the feed having an organic oxygen content of 1.0 wt % or more, to a bulk multimetallic catalyst comprising at least one Group 6 metal and at least one Group 8-10 metal under deoxygenation conditions to form a deoxygenated effluent comprising hydrocarbons, CO, CO 2 , and water, a weight ratio of CO 2 to water in the deoxygenated effluent being 1.0 or more, a weight ratio of CO to CO 2 being 0.5 or less; and cascading at least a portion of the deoxygenated effluent to an isomerization catalyst under isomerization conditions to form an isomerized, deoxygenated effluent.

2 . The method of claim 1 , wherein the bulk multimetallic catalyst comprises Ni and W, Ni and Mo, or Ni, Mo, and W.

3 . The method of claim 1 , wherein the bulk multimetallic catalyst comprises a catalyst produced by heating a composition comprising the at least one metal from Group 6 of the Periodic Table of the Elements, the at least one metal from Groups 8-10 of the Periodic Table of the Elements, and a reaction product formed by heating (i) a first organic compound containing at least one amine group, and (ii) a second organic compound separate from said first organic compound and containing at least one carboxylic acid group to a temperature from about 195° C. to about 250° C. for a time sufficient for the first and second organic compounds to form a reaction product in situ that contains an amide moiety, unsaturated carbon atoms not present in the first or second organic compounds, or both, and then sulfiding the composition.

4 . The method of claim 1 , wherein the weight ratio of CO to CO 2 in the deoxygenated effluent is 0.4 or less.

5 . The method of claim 1 , wherein a weight ratio of organic oxygen content in the deoxygenated effluent to the organic oxygen content of the feed is 0.1 or less.

6 . The method of claim 1 , wherein a weight ratio of organic oxygen content in the deoxygenated effluent to the organic oxygen content of the feed is greater than 0.1.

7 . The method of claim 1 , wherein the feed comprises 4.0 wt % or more of organic oxygen, and wherein the deoxygenated effluent comprises 0.5 wt % to 4.0 wt % of organic oxygen.

8 . The method of claim 7 , wherein the isomerization catalyst comprises a zeolitic isomerization catalyst, the isomerization catalyst further comprising one or more catalytic metals.

9 . The method of claim 8 , wherein the one or more catalytic metals comprise at least one of Ni and Co, and at least one of Mo and W.

10 . The method of claim 8 , wherein the one or more catalytic metals are impregnated on the isomerization catalyst in the presence of a dispersion agent.

11 . The method of claim 1 , wherein the deoxygenation conditions comprise a temperature of 204° C. to 350° C. and a hydrogen partial pressure of 2.8 MPa-g to 6.9 MPa-g.

12 . The method of claim 1 , wherein the bulk multimetallic catalyst and the isomerization catalyst are contained within a single reactor.

13 . The method of claim 1 , further comprising exposing the feed to a supported base metal catalyst prior to the exposing the feed to the bulk multimetallic catalyst.

14 . The method of claim 13 , wherein the supported base metal catalyst, bulk multimetallic catalyst, and the isomerization catalyst are contained within a single reactor.

15 . The method of claim 1 , further comprising fractionating the isomerized, deoxygenated effluent to form at least one fraction comprising a 121° C.+ portion.

16 . The method of claim 15 , wherein the at least one fraction comprises a T10 distillation point of 121° C. or higher and a T90 distillation point of 300° C. or lower.

17 . The method of claim 15 , wherein the at least one fraction comprises a T10 distillation point of 200° C. or higher and a T90 distillation point of 343° C. or lower.

18 . The method of claim 15 , further comprising stripping the isomerized, deoxygenated effluent prior to the fractionating.

19 . The method of claim 15 , further comprising stripping the isomerized, deoxygenated effluent to form a stripped effluent; and hydroprocessing at least a portion of the stripped effluent.

Assignees

• Exxonmobil Technology & Engineering Company

Inventors

• Witzke Megan E
• Smiley Randolph J
• Bai Chuansheng
• Weigel Scott J
• Xu Xiaochun

Classifications

• Y02P30/20

  using bio-feedstock · CPC title

• C10G2400/08

  Jet fuel · CPC title

• C10G2400/04

  Diesel oil · CPC title

• C10G2300/70

  Catalyst aspects · CPC title

• C10G2300/4012

  Pressure · CPC title