Canadian Patents Database / Patent 2847914 Summary

Third-party information liability

Some of the information on this Web page has been provided by external sources. The Government of Canada is not responsible for the accuracy, reliability or currency of the information supplied by external sources. Users wishing to rely upon this information should consult directly with the source of the information. Content provided by external sources is not subject to official languages, privacy and accessibility requirements.

Claims and Abstract availability

Any discrepancies in the text and image of the Claims and Abstract are due to differing posting times. Text of the Claims and Abstract are posted:

  • At the time the application is open to public inspection;
  • At the time of issue of the patent (grant).
(12) Patent: (11) CA 2847914
(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)
  • D21B 1/02 (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: 2014-03-31
(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

The invention relates to a method comprising: irradiating a lignocellulosic feedstock material in air, using an electron beam, to generate carboxylic acid groups by reaction of the irradiated feedstock with the air and thereby provide an irradiated lignocellulosic material having a larger number of carboxylic acid groups than the lignocellulosic material from which the irradiated material was obtained.


French Abstract

L'invention porte sur une méthode comprenant l'irradiation d'un matériau d'alimentation lignocellulosique dans l'air à l'aide d'un faisceau d'électrons pour générer des groupes d'acide carboxylique par réaction du matériau irradié avec l'air et ainsi de fournir un matériau lignocellulosique irradié ayant un nombre plus grand de groupes acides carboxyliques que le matériau lignocellulosique duquel le matériau irradié a été obtenu.


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

CLAIMS:
1. A method comprising:
irradiating a lignocellulosic feedstock material in air, using an electron
beam, to
generate carboxylic acid groups by reaction of the irradiated feedstock with
the air and thereby
provide an irradiated lignocellulosic material having a larger number of
carboxylic acid groups
than the lignocellulosic material from which the irradiated material was
obtained;
wherein the lignocellulosic feedstock material is selected from the group
consisting of grasses, rice hulls, bagasse, jute, hemp, flax, sisal, abaca,
straw, corn cobs, corn
stover, alfalfa, hay, coconut hair, seaweed, algae, and mixtures thereof; and
wherein the electron beam delivers electrons having an energy of about 0.3 MeV

to about 2.0 MeV.
2. The method of claim 1 wherein the irradiated material further comprises
functional groups selected from the group consisting of hydroxyl groups,
aldehyde groups, ketone
groups and ester groups.
3. The method of claim 1 or 2 wherein irradiating comprises applying to the

lignocellulosic feedstock material a total dose of between 10 Mrad and 150
Mrad.
4. The method of any one of claims 1 to 3 wherein irradiating comprises
applying to
the lignocellulosic feedstock material a total dose of between about 20 MRad
and about 50 MRad.
5. The method of any one of claims 1 to 4 further comprising subjecting the

lignocellulosic material to one or more of the following: stone grinding,
mechanical ripping or
tearing, pin grinding, milling, or air attrition milling.
6. The method of claim 5 wherein, following grinding, ripping, tearing or
milling, the
irradiated lignocellulosic material has a bulk density of less than about 0.5
g/cm3.
130

7. The method of any one of claims 1 to 6 wherein the lignocellulosic
feedstock
material has, prior to physical treatment, a bulk density of greater than
about 0.7 g/cm3.
8. The method of any one of claims 1 to 7 wherein the lignocellulosic
feedstock
material has a Brunauer-Emmett-Teller (BET) surface area of greater than 0.25
m2/g.
9. The method of any one of claims 1 to 8 wherein the lignocellulosic
feedstock
material has a length to diameter ratio of at least 5.
10. The method of any one of claims 1 to 9 wherein irradiating comprises
applying
radiation to the lignocellulosic feedstock material with more than one
electron beam device.
11. The method of any one of claims 1 to 10, further comprising treating
the
lignocellulosic material with a chemical.
12. The method of claim 11 wherein the chemical is a base, a mineral acid,
or a base
and a mineral acid.
13. The method of claim 12 wherein the material is treated with a base
selected from
the group consisting of sodium hydroxide, potassium hydroxide, lithium
hydroxide and
ammonium hydroxide.
14. The method of claim 13 wherein the material is treated with potassium
hydroxide.
15. The method of claim 12 wherein the material is treated with a mineral
acid
selected from the group consisting of sulfuric acid, hydrochloric acid and
phosphoric acid.
16. The method of claim 15 wherein the material is treated with sulfuric
acid.
131


A single figure which represents the drawing illustrating the invention.

For a clearer understanding of the status of the application/patent presented on this page, the site Disclaimer , as well as the definitions for Patent , Administrative Status , Maintenance Fee  and Payment History  should be consulted.

Admin Status

Title Date
(22) Filed 2007-10-26
(41) Open to Public Inspection 2008-06-19
Examination Requested 2014-03-31
(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
  • the additional fee for late payment set out in Items 31 and 32 of Schedule II of the Patent Rules.

Payment History

Fee Type Anniversary Year Due Date Amount Paid Paid Date
Request for Examination $800.00 2014-03-31
Registration of Documents $100.00 2014-03-31
Filing $400.00 2014-03-31
Maintenance Fee - Application - New Act 2 2009-10-26 $100.00 2014-03-31
Maintenance Fee - Application - New Act 3 2010-10-26 $100.00 2014-03-31
Maintenance Fee - Application - New Act 4 2011-10-26 $100.00 2014-03-31
Maintenance Fee - Application - New Act 5 2012-10-26 $200.00 2014-03-31
Maintenance Fee - Application - New Act 6 2013-10-28 $200.00 2014-03-31
Final $702.00 2014-08-13
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

To view selected files, please enter reCAPTCHA code :




Filter Download Selected in PDF format (Zip Archive)
Document
Description
Date
(yyyy-mm-dd)
Number of pages Size of Image (KB)
Cover Page 2014-12-03 1 37
Abstract 2014-03-31 1 14
Description 2014-03-31 130 6,975
Claims 2014-03-31 2 73
Drawings 2014-03-31 35 1,907
Representative Drawing 2014-04-25 1 8
Cover Page 2014-05-12 1 37
Prosecution-Amendment 2014-03-31 1 49
Correspondence 2014-04-17 1 54
Prosecution-Amendment 2014-04-25 1 20
Correspondence 2014-08-13 2 75