Canadian Patents Database / Patent 2848500 Summary

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(12) Patent: (11) CA 2848500
(54) English Title: METHODS OF PROCESSING BIOMASS COMPRISING ELECTRON-BEAM RADIATION
(54) French Title: METHODE DE TRAITEMENT D'UNE BIOMASSE INCLUANT UN RAYONNEMENT PAR FAISCEAU ELECTRONIQUE
(51) International Patent Classification (IPC):
  • C12P 7/16 (2006.01)
  • C12P 7/02 (2006.01)
  • C12P 7/10 (2006.01)
  • C12P 19/00 (2006.01)
  • D21C 1/10 (2006.01)
(72) Inventors (Country):
  • MEDOFF, MARSHALL (United States of America)
(73) Owners (Country):
  • XYLECO, INC. (United States of America)
(71) Applicants (Country):
  • XYLECO, INC. (United States of America)
(74) Agent: SMART & BIGGAR
(45) Issued: 2014-12-16
(22) Filed Date: 2007-10-26
(41) Open to Public Inspection: 2008-06-19
Examination requested: 2014-04-07
(30) Availability of licence: N/A
(30) Language of filing: English

(30) Application Priority Data:
Application No. Country Date
60/854,519 United States of America 2006-10-26
60/863,290 United States of America 2006-10-27
60/859,911 United States of America 2006-11-17
60/875,144 United States of America 2006-12-15
60/881,891 United States of America 2007-01-23

English Abstract

This invention relates to a method comprising: comminuting a lignocellulosic material selected from the group consisting of grasses, rice hulls, bagasse, jute, hemp, flax, bamboo, sisal, abaca, straw, corn cobs, corn stover, alfalfa, hay, coconut hair, seaweed, algae, and mixtures thereof; irradiating the lignocellulosic material; hydrolyzing the irradiated material with an enzyme or microorganism to produce sugars or converting the irradiated material with an enzyme or microorganism to produce sugars; and fermenting the sugars to produce a fuel.


French Abstract

L'invention porte sur une méthode comprenant la pulvérisation de matière lignocellulosique sélectionnée parmi un groupe comprenant les matières suivantes : herbacés, écailles de riz, bagasse, jute, chanvre, lin, bambou, sisal, abaca, paille, rafle de maïs, canne de maïs, luzerne, foin, fibres de noix de coco, algues marines, algues et des mélanges de celles-ci; l'irradiation de la matière cellulosique; l'hydrolysation de la matière irradiée avec une enzyme ou un microorganisme pour produire des sucres ou convertir la matière irradiée avec un enzyme ou un microorganisme pour produire des sucres et la fermentation des sucres pour produire un carburant.


Note: Claims are shown in the official language in which they were submitted.

CLAIMS:
1. A method comprising:
comminuting a lignocellulosic material selected from the group consisting of
grasses, rice hulls, bagasse, jute, hemp, flax, bamboo, sisal, abaca, straw,
corn cobs, corn
stover, alfalfa, hay, coconut hair, seaweed, algae, and mixtures thereof;
irradiating the lignocellulosic material with a total dose of radiation of
between
Mrad and 150 Mrad;
converting the irradiated material with an enzyme or microorganism to produce
sugars; and
fermenting the sugars to produce a fuel,
wherein irradiating is performed with an electron beam device that delivers
electrons having an energy of 0.3 MeV to 2.0 MeV.
2. The method of claim 1 wherein irradiating comprises applying radiation
to the
lignocellulosic material with more than one electron beam device.
3. The method of claim 2 further comprising moving the lignocellulosic
material
through and between the electron beam devices.
4. The method of any one of claims 1 to 3 wherein the electron beam device
delivers electrons having an energy of 0.7 MeV to 1.25 MeV.
5. The method of any one of claims 1 to 4 wherein the lignocellulosic
material
comprises corn cobs or corn stover.
6. The method of any one of claims 1 to 5 wherein converting comprises
contacting the irradiated material with a cellulase in an aqueous medium.
130

7. The method of any one of claims 1 to 6 wherein comminuting the
lignocellulosic material comprises subjecting the material to one or more of
the following:
stone grinding, mechanical ripping or tearing, pin grinding, milling, or air
attrition milling.
8. The method of claim 7 wherein comminuting comprises milling the
material.
9. The method of any one of claims 1 to 8, wherein the lignocellulosic
material is
irradiated with a total dose of radiation of between about 20 Mrad and about
50 Mrad.
10. The method of any one of claims 1 to 9, further comprising treating the

lignocellulosic material with a chemical.
11. The method of claim 10 wherein the chemical is a base, a mineral acid,
or a
base and a mineral acid.
12. The method of claim 11 wherein the material is treated with a base
selected
from the group consisting of sodium hydroxide, potassium hydroxide, lithium
hydroxide and
ammonium hydroxide.
13. The method of claim 12 wherein the material is treated with potassium
hydroxide.
14. The method of claim 11 wherein the material is treated with a mineral
acid
selected from the group consisting of sulfuric acid, hydrochloric acid and
phosphoric acid.
15. The method of claim 14 wherein the material is treated with sulfuric
acid.
16. The method of any one of claims 1 to 15 wherein the fuel is selected
from the
group consisting of alcohols, organic acids, hydrocarbons, and mixtures
thereof.
17. The method of claim 16 wherein the fuel comprises an alcohol.
18. The method of claim 17, wherein the alcohol is ethanol or butanol.
131


A single figure which represents the drawing illustrating the invention.

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Admin Status

Title Date
(22) Filed 2007-10-26
(41) Open to Public Inspection 2008-06-19
Examination Requested 2014-04-07
(45) Issued 2014-12-16

Maintenance Fee

Description Date Amount
Last Payment 2017-10-23 $250.00
Next Payment if small entity fee 2018-10-26 $125.00
Next Payment if standard fee 2018-10-26 $250.00

Note : If the full payment has not been received on or before the date indicated, a further fee may be required which may be one of the following

  • the reinstatement fee set out in Item 7 of Schedule II of the Patent Rules;
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Payment History

Fee Type Anniversary Year Due Date Amount Paid Paid Date
Request for Examination $800.00 2014-04-07
Registration of Documents $100.00 2014-04-07
Filing $400.00 2014-04-07
Maintenance Fee - Application - New Act 2 2009-10-26 $100.00 2014-04-07
Maintenance Fee - Application - New Act 3 2010-10-26 $100.00 2014-04-07
Maintenance Fee - Application - New Act 4 2011-10-26 $100.00 2014-04-07
Maintenance Fee - Application - New Act 5 2012-10-26 $200.00 2014-04-07
Maintenance Fee - Application - New Act 6 2013-10-28 $200.00 2014-04-07
Final $702.00 2014-09-09
Maintenance Fee - Application - New Act 7 2014-10-27 $200.00 2014-10-02
Maintenance Fee - Patent - New Act 8 2015-10-26 $200.00 2015-10-19
Maintenance Fee - Patent - New Act 9 2016-10-26 $200.00 2016-10-24
Maintenance Fee - Patent - New Act 10 2017-10-26 $250.00 2017-10-23

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Document
Description
Date
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Cover Page 2014-12-03 1 40
Abstract 2014-04-07 1 18
Description 2014-04-07 130 6,970
Claims 2014-04-07 2 67
Drawings 2014-04-07 35 1,845
Representative Drawing 2014-05-27 1 8
Cover Page 2014-05-28 1 40
Prosecution-Amendment 2014-04-07 2 59
Correspondence 2014-04-28 1 54
Correspondence 2014-09-09 2 77