IP Library › Granted Patent US 9,278,379
Granted Patent B2
US 9,278,379 · App. 13/917,169 · Granted Mar 8, 2016

Methods and systems for reducing the level of one or more impurities that are present in a pretreated cellulosic material and/or distillate

Inventors: David Charles Carlson (Yankton, SD); Blake J. Gomer (Olivet, SD); Casey C. Jenks (Tripp, SD); Sharil Kirschman-Rollag (Beaver Creek, MN); Kristine Nicole Plack (Harrisburg, SD); Melissa R. Reis (Sioux Falls, SD)
Assignee: POET RESEARCH, INC.
B08B1/00C07C29/80C07C29/88C12P7/06C12P7/10Y02E50/16Y02E50/17
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Quick Facts
Patent No.
US 9,278,379
App. No.
13/917,169
Granted
Mar 8, 2016
Kind
B2
Abstract

The present invention relates to methods and systems for remediating one or more impurities (e.g., diacetyl) that are present in manufacturing an alcohol (e.g., ethanol) from cellulosic biomass. The methods and systems include reacting the one or more impurities with at least one treatment compound (e.g., an oxidizing agent, an alkali compound, or a mixture thereof) to form a reaction product that can be separated from the alcohol.

Claims (8)

1. A method of reducing the concentration of diacetyl that is present in a pretreated cellulosic material comprising:

providing a pretreated cellulosic material comprising:

at least one monosaccharide; and

diacetyl;

fermenting the pretreated cellulosic material to convert it into a fermentation composition wherein the at least one monosaccharide is converted into an alcohol

contacting the fermentation composition with at least one treatment compound so that the at least one treatment compound reacts with the diacetyl to form a reaction product thereby reducing the concentration of the diacetyl in the fermentation composition, wherein the at least one treatment compound is chosen from an oxidizing agent, an alkali compound, and mixtures thereof.

2. The method of claim 1 , wherein the pretreated cellulosic material has been pretreated to break down at least a portion of hemicellulose and/or cellulose into the at least one monosaccharide.

3. The method of claim 1 , further comprising exposing the pretreated cellulosic material to ultraviolet light to reduce the concentration of the diacetyl.

Assignments (5)
SECURITY INTEREST Recorded Apr 3, 2020
From: POET RESEARCH, INC.
To: COBANK, ACB, AS ADMINISTRATIVE AGENT
Reel/Frame 052312/0801 →
RELEASE OF SECURITY INTEREST RECORDED AT REEL/FRAME 035603/0778 Recorded Apr 2, 2020
From: JPMORGAN CHASE BANK N.A., AS ADMINISTRATIVE AGENT
To: POET, LLC; POET RESEARCH, INC.; POET PLANT MANAGEMENT, LLC; POET INVESTMENTS, INC.; POET BIOMASS, LLC; POET DESIGN AND CONSTRUCTION, INC.; RISK MANAGEMENT ASSOCIATES, INC.; POET NUTRITION, INC.; POET RESEARCH CENTER, LLC (FORMERLY KNOWN AS POET RESEARCH CENTER, INC.); POET LEASING, LLC; POET NUTRITION INTERNATIONAL, INC.
Reel/Frame 052299/0676 →
SECURITY INTEREST Recorded Apr 2, 2020
From: POET RESEARCH, INC.
To: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 052295/0712 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 30, 2015
From: CARLSON, DAVID CHARLES; GOMER, BLAKE J.; JENKS, CASEY C.; KIRSCHMAN-ROLLAG, SHARIL; PLACK, KRISTINE NICOLE; REIS, MELISSA R.
To: POET RESEARCH, INC.
Reel/Frame 035937/0391 →
ACKNOWLEDGEMENT OF SECURITY INTEREST IN PATENTS Recorded May 6, 2015
From: POET, LLC; POET RESEARCH, INC.; POET PLANT MANAGEMENT, LLC; POET INVESTMENTS, INC.; POET BIOMASS, LLC; POET DESIGN AND CONSTRUCTION, INC.; RISK MANAGEMENT ASSOCIATES, INC.; POET NUTRITION, INC.; POET RESEARCH CENTER, INC.; POET LEASING, LLC; POET NUTRITION INTERNATIONAL, INC.
To: JPMORGAN CHASE BANK, N.A.
Reel/Frame 035603/0778 →
Continuity (2)
Provisional Application 61660043 · Jun 15, 2012
Related Publication 20130337521A1 · Dec 19, 2013