Advanced adsorption processes for separation of bio-derived products

Patent metadata

Field	Value
Publication number	US-11279666-B2
Application number	US-202016942888-A
Country	US
Kind code	B2
Filing date	Jul 30, 2020
Priority date	Jul 30, 2019
Publication date	Mar 22, 2022
Grant date	Mar 22, 2022

Abstract

Disclosed herein are methods for the recovery of target bio-base carboxylic acid products using a sorption-based technology with a mixed elution solvent optimized for minimized downstream distillation energy input. The sorption-based technology includes absorbing the targeted bio-base carboxylic acid products onto a non-ionic resin and eluting the targeted bio-base carboxylic acid products with a mixed elution solvent. The mixed elution solvent includes a first solvent and a second solvent. The first solvent has a boiling point that is lower than the targeted bio-base carboxylic acid products and the second solvent is selected from the group consisting of a phosphine oxide or tertiary amine.

First claim

We claim:

1. A method for separating a bio-based carboxylic acid product from an aqueous solution comprising the step of selecting a first solvent and a second solvent wherein the first solvent has a boiling point that is lower than the bio-based carboxylic acid product and wherein the second solvent is selected from the group consisting of a phosphine oxide or tertiary amine and is miscible with the first solvent and has a boiling point above the bio-based carboxylic acid product; and further comprising the adsorption of the bio-based carboxylic acid product onto a non-ionic resin.

2. The method of claim 1 wherein the carboxylic acid is lactic acid or butyric acid.

3. The method of claim 1 wherein the first solvent is selected from the group consisting of acetone and methanol.

4. The method of claim 1 wherein the non-ionic resin is selected from the group consisting of Amberlite™, Dowex®, or Polybenzimidazole (PBI).

5. The method of claim 1 wherein the non-ionic resin is poly(4-vinylpyridine).

6. The method of claim 1 wherein the method further comprises desorbing the bio-based carboxylic acid product from the resin using a mixture of the first solvent and the second solvent.

7. The method of claim 6 further comprising distilling the first and second solvent from a mixture of the desorbed bio-based carboxylic acid product and the first and second solvent.

8. The method of claim 7 wherein the bio-based product is isolated.

9. A method for separating a carboxylic acid fermentation product from an aqueous solution comprising adsorption of the carboxylic acid fermentation product onto a non-ionic resin and further comprising the step of selecting a first solvent and a second solvent wherein the second solvent is selected from the group consisting of a phosphine oxide or tertiary amine and wherein the first solvent has a boiling point that is lower than the carboxylic acid fermentation product and wherein the second solvent is miscible with the first solvent and has a boiling point above the carboxylic acid fermentation product.

10. The method of claim 9 wherein the first solvent is selected from the group consisting of acetone and methanol.

11. The method of claim 9 wherein the non-ionic resin is poly(4-vinylpyridine).

12. The method of claim 9 wherein the method further comprises desorbing the fermentation product from the resin using a mixture of the first solvent and the second solvent.

13. The method of claim 12 further comprising distilling the first and second solvent from a mixture of the desorbed carboxylic acid fermentation product and the first and second solvent.

14. The method of claim 13 wherein the carboxylic acid fermentation product is isolated.

Assignees

• Alliance Sustainable Energy

Inventors

• Saboe Patrick Owen
• Karp Eric M
• Manker Lorenz Perry
• Monroe Hanna Rose

Classifications

• B01J20/3475

  in the liquid phase · CPC title

• B01D3/40

  Extractive distillation · CPC title

• B01J20/261

  obtained by reactions only involving carbon to carbon unsaturated bonds (macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds per se C08F) · CPC title

• B01D3/143

  by two or more of a fractionation, separation or rectification step · CPC title

• C07C51/47 Primary

  by solid-liquid treatment; by chemisorption · CPC title