GB1310835A - Treatment of chemical cellulosic pulp - Google Patents
Treatment of chemical cellulosic pulpInfo
- Publication number
- GB1310835A GB1310835A GB1310835DA GB1310835A GB 1310835 A GB1310835 A GB 1310835A GB 1310835D A GB1310835D A GB 1310835DA GB 1310835 A GB1310835 A GB 1310835A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pulp
- cellulosic pulp
- treatment
- oxygen
- chemical cellulosic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/1068—Bleaching ; Apparatus therefor with O2
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/1026—Other features in bleaching processes
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
Abstract
1310835 Delignification of cellulosic pulp PULP & PAPER RESEARCH INSTITUTE OF CANADA 5 May 1971 [28 May 1970] 25627/70 Headings D2W and D1P Chemical cellulosic pulp is delignified and bleached by distributing gaseous ammonia in the moisture of the pulp which has been comminuted into fiber and fiber aggregates and pressed to a consistency of 15-40% and then heating the pulp in the presence of oxygen at 85-135‹C and 58-174 psig pressure for 10-360 mins. Air, steam or oxygen may be used as carrier for the ammonia gas.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2562770 | 1970-05-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1310835A true GB1310835A (en) | 1973-03-21 |
Family
ID=10230731
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1310835D Expired GB1310835A (en) | 1970-05-28 | 1970-05-28 | Treatment of chemical cellulosic pulp |
Country Status (5)
Country | Link |
---|---|
JP (1) | JPS4938922B1 (en) |
CA (1) | CA943707A (en) |
FR (1) | FR2093816A5 (en) |
GB (1) | GB1310835A (en) |
SE (1) | SE358680B (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8673031B2 (en) | 2009-08-24 | 2014-03-18 | Board Of Trustees Of Michigan State University | Pretreated densified biomass products |
US8945245B2 (en) | 2009-08-24 | 2015-02-03 | The Michigan Biotechnology Institute | Methods of hydrolyzing pretreated densified biomass particulates and systems related thereto |
US8968515B2 (en) | 2006-05-01 | 2015-03-03 | Board Of Trustees Of Michigan State University | Methods for pretreating biomass |
US9206446B2 (en) | 2006-05-01 | 2015-12-08 | Board Of Trustees Of Michigan State University | Extraction of solubles from plant biomass for use as microbial growth stimulant and methods related thereto |
US9650657B2 (en) | 2010-04-19 | 2017-05-16 | Board Of Trustees Of Michigan State University | Methods for producing extracted and digested products from pretreated lignocellulosic biomass |
US10202660B2 (en) | 2012-03-02 | 2019-02-12 | Board Of Trustees Of Michigan State University | Methods for increasing sugar yield with size-adjusted lignocellulosic biomass particles |
US10457810B2 (en) | 2009-08-24 | 2019-10-29 | Board Of Trustees Of Michigan State University | Densified biomass products containing pretreated biomass fibers |
US10730958B2 (en) | 2017-03-08 | 2020-08-04 | Board Of Trustees Of Michigan State University | Pretreatment of densified biomass using liquid ammonia and systems and products related thereto |
US11440999B2 (en) | 2017-07-07 | 2022-09-13 | Board Of Trustees Of Michigan State University | De-esterification of biomass prior to ammonia pretreatment |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4002526A (en) * | 1975-10-10 | 1977-01-11 | International Paper Company | Oxygen-alkali delignification of low consistency wood pulp |
-
1970
- 1970-05-28 GB GB1310835D patent/GB1310835A/en not_active Expired
-
1971
- 1971-05-27 FR FR7119287A patent/FR2093816A5/fr not_active Expired
- 1971-05-27 JP JP3666971A patent/JPS4938922B1/ja active Pending
- 1971-05-27 SE SE686971A patent/SE358680B/xx unknown
- 1971-05-27 CA CA114,066A patent/CA943707A/en not_active Expired
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8968515B2 (en) | 2006-05-01 | 2015-03-03 | Board Of Trustees Of Michigan State University | Methods for pretreating biomass |
US9206446B2 (en) | 2006-05-01 | 2015-12-08 | Board Of Trustees Of Michigan State University | Extraction of solubles from plant biomass for use as microbial growth stimulant and methods related thereto |
US9644222B2 (en) | 2006-05-01 | 2017-05-09 | Board Of Trustees Of Michigan State University | Methods for pretreating biomass |
US8673031B2 (en) | 2009-08-24 | 2014-03-18 | Board Of Trustees Of Michigan State University | Pretreated densified biomass products |
US8945245B2 (en) | 2009-08-24 | 2015-02-03 | The Michigan Biotechnology Institute | Methods of hydrolyzing pretreated densified biomass particulates and systems related thereto |
US9039792B2 (en) | 2009-08-24 | 2015-05-26 | Board Of Trustees Of Michigan State University | Methods for producing and using densified biomass products containing pretreated biomass fibers |
US9458482B2 (en) | 2009-08-24 | 2016-10-04 | The Michigan Biotechnology Institute | Methods of hydrolyzing pretreated densified biomass particulates and systems related thereto |
US10457810B2 (en) | 2009-08-24 | 2019-10-29 | Board Of Trustees Of Michigan State University | Densified biomass products containing pretreated biomass fibers |
US9650657B2 (en) | 2010-04-19 | 2017-05-16 | Board Of Trustees Of Michigan State University | Methods for producing extracted and digested products from pretreated lignocellulosic biomass |
US10202660B2 (en) | 2012-03-02 | 2019-02-12 | Board Of Trustees Of Michigan State University | Methods for increasing sugar yield with size-adjusted lignocellulosic biomass particles |
US10730958B2 (en) | 2017-03-08 | 2020-08-04 | Board Of Trustees Of Michigan State University | Pretreatment of densified biomass using liquid ammonia and systems and products related thereto |
US11440999B2 (en) | 2017-07-07 | 2022-09-13 | Board Of Trustees Of Michigan State University | De-esterification of biomass prior to ammonia pretreatment |
Also Published As
Publication number | Publication date |
---|---|
FR2093816A5 (en) | 1972-01-28 |
JPS4938922B1 (en) | 1974-10-22 |
SE358680B (en) | 1973-08-06 |
CA943707A (en) | 1974-03-19 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |