Systems for treating biomass for the production of ethanol are disclosed. The systems are configured to treat a liquid component separated from biomass to yield sugars available to be fermented into a fermentation product. The systems comprise a filter configured to remove particulate matter to provide a filtered component and an apparatus configured to remove inhibitors from the filtered liquid component provide a treated liquid component comprising sugars available for fermentation. Methods for treating for treating biomass useful in the production of a fermentation product are also disclosed. The methods include the steps of filtering a liquid component to remove particulate matter thereby yielding a filtered liquid component, and treating the filtered liquid component to remove inhibitors thereby yielding a treated liquid component comprising sugars available to be fermented into a fermentation product.

Claims

12 · 1 independent · depth 4

12 granted claims

›1.independentA system for the production of ethanol from pre-treated biomass comprising:na source of pre-treated biomass;a centrifuge in fluid communication with t…+11

›2.↳ 1The system of claim 1 wherein the inhibitors comprise furfural.d2

›3.↳ 1The system of claim 1 wherein the inhibitors comprise hydroxymethylfurfural.d2

›4.↳ 1The system of claim 1 wherein the liquid component comprises furfural in a concentration of at least 700 PPM.d2

›5.↳ 1The system of claim 1 wherein the resin does not retain sugars.d2

›6.↳ 1The system of claim 1 wherein the resin does not retain xylose.d2

›7.↳ 1The system of claim 1 wherein the first treated liquid component comprises furfural at a concentration of no more than 700 PPM.d2

›8.↳ 1The system of claim 1 wherein the first treated liquid component comprises hydroxymethylfurfural at a concentration of no more than 100 PPM.d2

›9.↳ 1The system of claim 1 wherein the resin comprises an ion exchange chromatography type resin.d2

›10.↳ 1The system of claim 1, wherein the ion exchange system is in fluid communication with a source of a caustic solution and the filtered liquid component…d2+2

Classifications

11 codes

IPC · International Patent Classification

Section B — Performing operations; transporting

B01D36/00

USPC · US Patent Classification

210/180210/269210/251435/165210/190210/259210/266210/253435/289.1210/182

Claim changes

Soon

Coming soonHow the claims changed between publication and grant

See which claims were amended, added or cancelled during examination, with every added and removed word marked.

AmendedAddedCancelledUnchanged

The published claims of this patent are not paired with the granted ones in what we hold.

File wrapper

Pendency

4.9 y

1,798 days filing → grant

Office actions

after a restriction

Responses

4 RCE

Examiner

Matthew O Savage

art unit 1797 · TC 1700

Law firm

Law firm · Log in to unlock

Citations: 319 back · 0 forward

See the full prosecution history — every USPTO and applicant action on this file, in order.

Term & fees

See the term timeline — pendency span, in-force span, the maintenance fees paid and both computed expiry dates.

Priority chain

1 priority documents

Priority

3 Mar 2009

earliest claimed

›Priority documents — 1

Type	Document	Date
provisional	US 61157143	3 Mar 2009

Validity challenges

See the validity challenges on record — reexaminations, IPRs and PGRs, with their institution decisions and outcomes.

Citations

See every patent this one cites and every patent that cites it back — publication, assignee, and how each one was found.