Canadian Patents Database / Patent 2823381 Summary

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(12) Patent: (11) CA 2823381
(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):
  • D21C 1/10 (2006.01)
  • C12P 1/00 (2006.01)
  • C12P 7/10 (2006.01)
  • C12P 19/00 (2006.01)
  • D21C 1/00 (2006.01)
  • F01K 13/00 (2006.01)
  • F01K 21/00 (2006.01)
  • C08H 7/00 (2011.01)
(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: 2013-08-07
(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 inventions relates to a method comprising burning a lignin-containing residue to generate energy, in which the lignin-containing residue has been obtained by irradiating a cellulosic and/or lignocellulosic material.


French Abstract

L'invention porte sur une méthode comprenant le comprenant la combustion d'un résidu contenant de la lignine pour produire de l'énergie, dans laquelle le résidu contenant de la lignine a été obtenu en irradiant un matériau cellulosique ou lignocellulosique.


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


CLAIMS:
1. A method comprising:
burning a lignin-containing residue to generate energy,
wherein the lignin-containing residue is a post-distillate solid produced by:
irradiating a lignocellulosic material,
saccharifying the lignocellulosic material utilizing an enzyme,
fermenting the saccharified material utilizing an organism to produce a
fermentation product,
distilling the fermentation product from the lignin-containing residues,
wherein irradiating comprises treating with electron beam radiation to a total

dose of between 10 Mrad and 150 Mrad, and
wherein irradiating is performed at a dose rate of 1 Mrad/s to 10 Mrad/s.
2. The method of claim 1 wherein the lignin-containing residue is burned to
heat
water flowing through a heat exchanger.
3. The method of claim 2 further comprising evaporating the water flowing
through the heat exchanger and superheating it to steam.
4. The method of claim 3 further comprising using the steam in heat
exchange in
a distillation process.
5. The method of claim 3 or 4 further comprising allowing the steam to
expand to
power a multi-stage steam turbine connected to an electric generator.
6. The method of claim 5 further comprising condensing steam exiting the
steam
turbine with cooling water, and returning the condensate to the heat exchanger
for reheating to
steam.
130


7. The method of any one of claims 2 to 6 further comprising controlling
the flow
rate of water through the heat exchanger to obtain a target electricity output
from the steam
turbine when the turbine is connected to an electric generator.
8. The method of claim 7 further comprising adding water to the heat
exchanger
to ensure that the steam turbine is operating above a threshold condition.
9. The method of claim 8, wherein the turbine is spinning fast enough to
turn the
electric generator.
10. The method of any one of claims 1 to 9, wherein the total dose is
between 20
Mrad and 50 Mrad.
11. The method of any one of claims 1 to 10 wherein the lignocellulosic
material is
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
12. The method of any one of claims 1 to 11 wherein the electron beam
delivers
electrons having an energy of 0.3 MeV to 2.0 MeV.
13. The method of any one of claims 1 to 12, the method further comprising
comminuting the lignocellulosic material.
14. The method of claim 13, wherein comminuting comprises subjecting the
material to one or more of the following: stone grinding, mechanical ripping
or tearing, pin
grinding, milling, or air attrition milling.
15. The method of any one of claims 1 to 14 wherein the lignin-containing
residue
further comprises cellulose and hemicellulose.
16. The method of any one of claims 1 to 15, further comprising treating
the
lignocellulosic material with a chemical.
131


17. The method of claim 16 wherein the chemical is a base, a mineral acid,
or a
base and a mineral acid.
18. The method of claim 17 wherein the material is treated with a base
selected
from the group consisting of sodium hydroxide, potassium hydroxide, lithium
hydroxide and
ammonium hydroxide.
19. The method of claim 18 wherein the material is treated with potassium
hydroxide.
20. The method of claim 17 wherein the material is treated with a mineral
acid
selected from the group consisting of sulfuric acid, hydrochloric acid and
phosphoric acid.
21. The method of claim 20 wherein the material is treated with sulfuric
acid.
132


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 2013-08-07
(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;
  • the late payment fee set out in Item 22.1 of Schedule II of the Patent Rules; or
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Payment History

Fee Type Anniversary Year Due Date Amount Paid Paid Date
Request for Examination $800.00 2013-08-07
Registration of Documents $100.00 2013-08-07
Filing $400.00 2013-08-07
Maintenance Fee - Application - New Act 2 2009-10-26 $100.00 2013-08-07
Maintenance Fee - Application - New Act 3 2010-10-26 $100.00 2013-08-07
Maintenance Fee - Application - New Act 4 2011-10-26 $100.00 2013-08-07
Maintenance Fee - Application - New Act 5 2012-10-26 $200.00 2013-08-07
Maintenance Fee - Application - New Act 6 2013-10-28 $200.00 2013-08-07
Final $708.00 2014-08-22
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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Abstract 2013-08-07 1 9
Description 2013-08-07 130 6,954
Claims 2013-08-07 3 86
Drawings 2013-08-07 35 1,216
Representative Drawing 2013-09-13 1 5
Cover Page 2013-09-17 1 33
Description 2014-02-18 130 6,962
Claims 2014-02-18 5 167
Claims 2014-06-12 3 83
Description 2014-06-12 130 6,954
Drawings 2014-02-18 35 1,911
Representative Drawing 2014-12-02 1 7
Cover Page 2014-12-02 1 35
Prosecution-Amendment 2013-08-07 1 50
Correspondence 2013-08-22 1 41
Prosecution-Amendment 2013-09-12 1 20
Prosecution-Amendment 2013-11-27 3 110
Prosecution-Amendment 2014-02-18 47 1,199
Prosecution-Amendment 2014-04-16 2 106
Prosecution-Amendment 2014-06-12 14 530
Correspondence 2014-08-22 2 76