Low metal biomass-derived pyrolysis oils and processes for producing the same

Patent metadata

Field	Value
Publication number	US-10519079-B2
Application number	US-201414230154-A
Country	US
Kind code	B2
Filing date	Mar 31, 2014
Priority date	Dec 23, 2009
Publication date	Dec 31, 2019
Grant date	Dec 31, 2019

Abstract

Low metal biomass-derived pyrolysis oils and processes for producing the same are provided. Low metal biomass-derived pyrolysis oil is produced by a process of contacting metal-containing biomass-derived pyrolysis oil with an acidic ion-exchange resin having sulfonic acid groups. Low metal biomass-derived pyrolysis oil is removed from spent acidic ion-exchange resin after ion-exchange.

First claim

What is claimed is:

1. A process for producing low metal biomass-derived pyrolysis oil comprising the steps of:
contacting metal-containing biomass-derived pyrolysis oil with an acidic ion-exchange resin having sulfonic acid active groups to form low metal biomass-derived pyrolysis oil and spent acidic ion-exchange resin;
removing the low metal biomass-derived pyrolysis oil from the spent acidic ion-exchange resin; and
washing the spent acidic ion-exchange resin with a solvent selected from the group consisting of methanol, ethanol, acetone, and combinations thereof to remove at least a portion of residual low metal biomass-derived pyrolysis oil from the spent acidic ion-exchange resin and to retain residual solvent in the residual low metal biomass-derived pyrolysis oil;
processing the residual low metal biomass-derived pyrolysis oil and residual solvent retained in the residual low metal biomass-derived pyrolysis oil into biofuel.

2. The process of claim 1 , wherein the step of contacting the metal-containing biomass-derived pyrolysis oil with the acidic ion-exchange resin comprises calculating the volume of ion-exchange resin to a given mass of metal-containing biomass-derived pyrolysis oil according to the following equation:
VC r (mL resin/kg oil)=(Σ i ( C i *1000 g/kg)/ MW i )* V i *1000 meq/eq/( TC r *D r )

wherein:
VC r is the volume capacity of the acidic ion-exchange resin to a given mass of metal-containing biomass-derived pyrolysis oil expressed in mL resin/kg of oil;
C i is the concentration of metal i in the metal-containing biomass-derived pyrolysis oil in gram metal/gram oil;
MW i is the molecular weight of metal i in g/mol;
V i is the valency (charge) of metal i in solution;
TC r is the theoretical capacity of the acidic ion-exchange resin r in milliequivalents ions/gram resin; and
D r is the acidic ion-exchange resin density in g/mL.

3. The process of claim 2 , wherein the step of contacting the metal-containing biomass-derived pyrolysis oil with the acidic ion-exchange resin comprises calculating the maximum volume (V oil ) of metal-containing biomass-derived pyrolysis oil per unit volume of resin that can be ion-exchanged according to the equation:
V oil =V r /( VC r *D feed ))
wherein:
V oil is the volume of metal-containing biomass-derived pyrolysis oil in liters;
D feed is the density of the metal-containing biomass-derived pyrolysis oil in kilograms/liter;
V r is the acidic ion-exchange resin volume in milliliters; and
VC r is the volume capacity of the acidic ion-exchange resin to a given mass of metal-containing biomass-derived pyrolysis oil expressed in mL resin/kg of oil.

4. The process of claim 3 , wherein the step of contacting the metal-containing biomass-derived pyrolysis oil comprises contacting the metal-containing biomass-derived pyrolysis oil with about 0.1 to about 10 times the volume capacity (VC r ) of the acidic ion-exchange resin.

5. The process of claim 1 , wherein the step of contacting the metal-containing biomass-derived pyrolysis oil with the acidic ion-exchange resin comprises mixing the acidic ion-exchange resin with the metal-containing biomass-derived pyrolysis oil.

6. The process of claim 5 , wherein the step of contacting the metal-containing biomass-derived pyrolysis oil comprises contacting the metal-containing biomass-derived pyrolysis oil with the acidic ion-exchange resin at:
a temperature of about 10° C. to about 120° C. and an exposure time of about 0.5 hours to about 24 hours.

7. The process of claim 1 , wherein the step of contacting the metal-containing biomass-derived pyrolysis oil with the acidic ion-exchange resin comprises the step of passing the metal-containing biomass-derived pyrolysis oil through a column containing the acidic ion-exchange resin.

8. The process of claim 7 , wherein the step of contacting the metal-containing biomass-derived pyrolysis oil with the acidic ion-exchange resin comprises contacting at:
a Liquid Hourly Space Velocity (LHSV) of about 0.1 to about 20 hr −1 , and
a temperature of about 10° C. to about 120° C.

9. The process of claim 8 , wherein the step of contacting the metal-containing biomass-derived pyrolysis oil with the acidic ion-exchange resin further comprises contacting at an absolute pressure of greater than 0 KPa to about 13790 KPa (greater than 0 psi to about 2000 psi).

10. The process of claim 1 wherein the metal-containing biomass-derived pyrolysis oil comprises about 0.02 to about 0.5 weight percent metals.

Assignees

• Uop Llc

Inventors

• Brandvold Timothy A

Classifications

• C10G2300/205

  Metal content · CPC title

• C10G2300/1011

  Biomass · CPC title

• Y02P30/20

  using bio-feedstock · CPC title

• B01J49/60

  Cleaning or rinsing ion-exchange beds · CPC title

• C10G2300/4018

  Spatial velocity, e.g. LHSV, WHSV · CPC title