Canadian Patents Database / Patent 2870758 Summary

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(12) Patent: (11) CA 2870758
(54) English Title: METHODS OF HYDROLYZING PRETREATED DENSIFIED BIOMASS PARTICULATES AND SYSTEMS RELATED THERETO
(54) French Title: PROCEDES D'HYDROLYSE DE PARTICULES DE BIOMASSE PRETRAITEES ET DENSIFIEES ET SYSTEMES ASSOCIES
(51) International Patent Classification (IPC):
  • C12P 19/02 (2006.01)
  • C12P 7/10 (2006.01)
  • C12P 19/14 (2006.01)
  • D21C 1/06 (2006.01)
  • D21C 1/10 (2006.01)
(72) Inventors (Country):
  • BALS, BRYAN (United States of America)
  • TEYMOURI, FARZANEH (United States of America)
  • CAMPBELL, TIMOTHY J. (United States of America)
  • DALE, BRUCE E. (United States of America)
(73) Owners (Country):
  • THE MICHIGAN BIOTECHNOLOGY INSTITUTE D/B/A MBI (United States of America)
  • BOARD OF TRUSTEES OF MICHIGAN STATE UNIVERSITY (United States of America)
(71) Applicants (Country):
  • THE MICHIGAN BIOTECHNOLOGY INSTITUTE D/B/A MBI (United States of America)
  • BOARD OF TRUSTEES OF MICHIGAN STATE UNIVERSITY (United States of America)
(74) Agent: RIDOUT & MAYBEE LLP
(45) Issued: 2018-01-16
(86) PCT Filing Date: 2013-04-26
(87) PCT Publication Date: 2013-10-31
Examination requested: 2014-10-10
(30) Availability of licence: N/A
(30) Language of filing: English

(30) Application Priority Data:
Application No. Country Date
13/458,830 United States of America 2012-04-27

English Abstract


A method is provided in which pretreated and densified cellulosic biomass
particulates can hydrolyzed at a high solids loading rate as compared with the

solids loading rate of loose hydrolysable cellulosic biomass fibers. The
resulting
high concentration sugar-containing stream can be easily converted to biofuels
or
to an entire suite of other useful bioproducts.


French Abstract

La présente invention concerne un procédé dans lequel des particules de biomasse cellulosique prétraitées et densifiées peuvent être hydrolysées à un taux de charge de matières solides élevée par comparaison avec le taux de charge de matières solides de fibres de biomasse cellulosique lâches hydrolysables. Le courant contenant du sucre à concentration élevée obtenu peut être facilement converti en biocarburant ou en une suite entière d'autres produits biologiques utiles.


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

CLAIMS
1. A method of producing a sugar-containing stream comprising:
enzymatically hydrolyzing one or more hydrolysable densified
biomass particulates in a stirred vessel to produce the sugar-containing
stream, wherein the stirred vessel is an industrial-scale vessel, wherein
the hydrolysis comprises a solids loading of said densified biomass
particulates within said vessel in a range of 12% to 24%, and wherein
said densified biomass particulates are produced by:
subjecting plant biomass fibers containing lignin and/or
hemicellulose to an ammonia or sodium hydroxide pretreatment to cause
at least a portion of the lignin and/or hemicellulose in said biomass
fibers to move to an outer surface to produce a quantity of pretreated
tacky plant biomass fibers; and
densifying said pretreated tacky plant biomass fibers to produce the
one or more hydrolysable densified biomass particulates, wherein said
densified plant biomass fibers are densified without using added binder.
2. The method of claim 1 wherein the stirred vessel has an impeller located

therein and an impeller to reactor diameter ratio is from 1:4 to 3:4.
3. The method of claim 2 wherein the ratio is 1:2 to 3:4 or 1:4 to 1:2.
4. The method of claim 1 wherein the solids loading is in the range of 12%
to
20%, or 18% to 24%.
5. The method of any one of claims 1 to 4 wherein said biomass fibers are
corn stover fibers, switchgrass fibers, wood fibers, prairie cord grass
fibers, wheat
straw, rice straw, or combinations thereof.
6. The method of claim 1 wherein the pretreatment step and the densifying
step
are performed as an integrated process at a single location.
52

7. The method of any one of claims 1 to 6 wherein the ammonia
pretreatment is a liquid ammonia fiber expansion (AFEX) pretreatment or a
gaseous AFEX pretreatment.
8. The method of claim 7 wherein the ammonia pretreatment is performed
in a pretreatment vessel and the method further comprises removing residual
ammonia remaining in the pretreatment vessel after the subjecting step by
introducing steam therein.
9. The method of any one of claims 1 to 8 wherein the method further
comprises adding water and/or steam to said plant biomass fibers prior to
and/or
during the pretreatment.
10. The method of claim 1 wherein the sugar-containing stream is fermented
to
produce a bioproduct.
11. The method of claim 10 wherein the bioproduct is a biofuel.
12. The method of any one of claims 1 to 11 wherein the sugar-containing
stream
contains more than 50% of available sugars in said densified biomass
particulates.
13. The method of claim 8 wherein the enzymatically hydrolyzing
comprises adding said densified biomass particulates to the stirred vessel in
two
or more steps separated by a period of hydrolysis activity.
14. The method of any one of claims 1 to 13 wherein sugar in the
convertible sugar-containing stream is produced from said densified biomass
particulates at a faster rate as compared to a sugar-containing stream
produced
using non-densified biomass.
15. The method of any one of claims 1 to 14 wherein the subjecting step
takes place in a vertical reactor.
53

16. A method comprising:
in a pretreatment vessel, subjecting plant biomass fibers containing lignin
and/or hemicellulose to an ammonia or sodium hydroxide pretreatment to cause
at least a portion of the lignin and/or hemicellulose in said biomass fibers
to move
to an outer surface of said fiber to produce pretreated tacky plant biomass
fibers;
removing residual ammonia remaining in the pretreatment vessel by
introducing steam therein;
densifying the pretreated tacky plant biomass fibers to produce one or
more hydrolysable densified biomass particulates wherein said biomass fibers
are
densified without using added binder; and
enzymatically hydrolyzing one or more hydrolysable densified
biomass particulates in a stirred vessel to produce a convertible sugar-
containing stream, wherein the stirred vessel is an industrial-scale vessel,
wherein the subjecting, densifying and enzymatically hydrolyzing steps are
performed as an integrated process at a single location and wherein the
hydrolysis comprises a solids loading of said densified biomass in the vessel
in a range of 12% to 24%.
17. The method of claim 16 wherein the method further comprises adding
water and/or steam to said plant biomass fibers prior to and/or during the
pretreatment.
18. The method of claim 16 or 17 wherein the stirred reactor has an
impeller
located therein, wherein an impeller to vessel diameter ratio is from 1:4 to
3:4.
19. A method comprising:
providing a hydrolysable densified biomass particulate or a plurality
thereof, the hydrolysable densified biomass particulate comprising a plurality

of plant biomass fibers containing lignin and/or hemicellulose at an outer
surface of the fibers, wherein the hydrolysable densified biomass particulate
is
in a compressed particulate form and is free from added binder; and
54

hydrolyzing the hydrolysable densified biomass particulate or plurality
thereof in a stirred vessel to produce a sugar-containing stream, wherein the
stirred vessel is an industrial-scale vessel, wherein the hydrolysis comprises
a
solids loading of said densified biomass particulates within said vessel is in
a
range of 12% to 24%, wherein said vessel has an impeller located therein, and
wherein an impeller to tank diameter ratio is a minimum of 1:4 and a
maximum of 3:4.
20. The method of claim 19 wherein the ratio is at least 1:2.


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Admin Status

Title Date
(86) PCT Filing Date 2013-04-26
(87) PCT Publication Date 2013-10-31
(85) National Entry 2014-10-10
Examination Requested 2014-10-10
(45) Issued 2018-01-16

Maintenance Fee

Description Date Amount
Last Payment 2017-03-22 $100.00
Next Payment if small entity fee 2018-04-26 $100.00
Next Payment if standard fee 2018-04-26 $200.00

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 2014-10-10
Registration of Documents $100.00 2014-10-10
Registration of Documents $100.00 2014-10-10
Filing $400.00 2014-10-10
Maintenance Fee - Application - New Act 2 2015-04-27 $100.00 2015-03-20
Maintenance Fee - Application - New Act 3 2016-04-26 $100.00 2016-03-23
Reinstatement - failure to respond to examiners report $200.00 2017-01-19
Maintenance Fee - Application - New Act 4 2017-04-26 $100.00 2017-03-22
Filing an Amendment after allowance $400.00 2017-10-26
Filing an Amendment after allowance $400.00 2017-11-06
Final $300.00 2017-11-29

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Abstract 2014-10-10 2 79
Claims 2014-10-10 3 1,597
Drawings 2014-10-10 8 779
Description 2014-10-10 51 2,587
Representative Drawing 2014-11-21 1 15
Cover Page 2014-12-31 1 48
Claims 2015-06-18 4 102
Claims 2015-07-16 4 118
Abstract 2015-10-23 1 9
Drawings 2015-10-23 8 761
Claims 2015-10-23 5 145
Description 2015-10-23 51 2,549
Claims 2016-02-12 5 154
Drawings 2016-02-12 8 803
Claims 2016-06-09 5 156
Claims 2016-12-01 4 111
Description 2016-12-01 52 2,569
PCT 2014-10-10 11 386
PCT 2014-11-14 36 22,743
Prosecution-Amendment 2015-05-25 1 36
PCT 2014-10-10 22 1,143
Prosecution-Amendment 2015-06-18 6 178
Prosecution-Amendment 2015-07-07 1 30
Prosecution-Amendment 2015-07-07 1 26
Prosecution-Amendment 2015-07-16 7 210
Prosecution-Amendment 2015-07-24 6 351
Prosecution-Amendment 2015-10-23 39 1,475
Prosecution-Amendment 2015-11-13 1 43
Prosecution-Amendment 2015-11-25 5 306
Prosecution-Amendment 2016-02-12 25 1,346
Prosecution-Amendment 2016-03-09 5 316
Prosecution-Amendment 2016-06-09 22 870
Prosecution-Amendment 2016-08-10 5 275
Prosecution-Amendment 2016-12-01 25 864
Correspondence 2016-12-01 25 864
Correspondence 2017-01-19 1 30
Prosecution-Amendment 2017-01-19 2 72
Correspondence 2017-01-25 1 28
Correspondence 2017-01-25 1 22
Prosecution-Amendment 2017-08-15 3 113
Prosecution-Amendment 2017-10-26 45 1,990
Claims 2017-10-26 4 105
Correspondence 2017-11-06 1 51
Prosecution-Amendment 2017-11-06 8 217
Claims 2017-11-06 4 107
Correspondence 2017-11-15 1 51
Correspondence 2017-11-29 1 52
Description 2017-10-26 52 2,373
Abstract 2017-12-06 1 8
Representative Drawing 2017-12-22 1 17
Cover Page 2017-12-22 1 52