SE7612248L - BOILING OF LIGNOCELLULOSE-MATERIALS - Google Patents
BOILING OF LIGNOCELLULOSE-MATERIALSInfo
- Publication number
- SE7612248L SE7612248L SE7612248A SE7612248A SE7612248L SE 7612248 L SE7612248 L SE 7612248L SE 7612248 A SE7612248 A SE 7612248A SE 7612248 A SE7612248 A SE 7612248A SE 7612248 L SE7612248 L SE 7612248L
- Authority
- SE
- Sweden
- Prior art keywords
- pulping
- degree
- lignocellulosic material
- stage
- defibration
- Prior art date
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
- D21C3/00—Pulping cellulose-containing materials
- D21C3/22—Other features of pulping processes
- D21C3/26—Multistage processes
-
- 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
- D21C3/00—Pulping cellulose-containing materials
- D21C3/22—Other features of pulping processes
- D21C3/222—Use of compounds accelerating the pulping processes
Landscapes
- Paper (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
G16-214 PROCESS FOR THE PULPING OF LIGNOCELLULOSIC MATERIAL WITH ALKALI AND QUINONES OR HYDROQUINONES A process is provided for the alkaline pulping of lignocellulosic material with sodium hydroxide as the active alkali, which is capable of producing pulp in a yield and quality quite comparable with sulfate pulp. The process is a two stage process, without defibration between the two stages, and comprises subjecting lignocellulosic material such as wood to a first pulping stage at a temperature within the range from about 145.degree. to about 200.degree.C in a pulping liquor comprising sodium carbonate and/or sodium bicarbonate while removing carbon dioxide generated in the pulping stage, and then continuing the pulping without an intervening defibration at a temperature within the range from about 145.degree. to about 200.degree.C in a pulping liquor comprising sodium hydroxide and a quinone or hydroquinone compound.
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE7612248A SE7612248L (en) | 1976-11-03 | 1976-11-03 | BOILING OF LIGNOCELLULOSE-MATERIALS |
NZ185406A NZ185406A (en) | 1976-11-03 | 1977-10-11 | Two stage sulphur-free digestion of lignocellulose materials use of quinones or derivatives in second stage |
FI773115A FI773115A (en) | 1976-11-03 | 1977-10-20 | KOKNING AV LIGNOCELLULOSAHALTIGA MATERIAL |
JP12665877A JPS5358004A (en) | 1976-11-03 | 1977-10-21 | Process for digesting lignocellulose containing material |
BR7707297A BR7707297A (en) | 1976-11-03 | 1977-10-31 | PROCESS FOR SULFUR-FREE DIGESTION OF LIGNOCELLULOSIC MATERIALS |
CA289,976A CA1096560A (en) | 1976-11-03 | 1977-11-01 | Process for the pulping of lignocellulosic material with alkali and quinones or hydroquinones |
NO773750A NO773750L (en) | 1976-11-03 | 1977-11-02 | PROCEDURE FOR COOKING LIGNOCELLULOSE-CONTAINING MATERIAL |
FR7732940A FR2370121A1 (en) | 1976-11-03 | 1977-11-02 | LIGNOCELLULOSIC MATERIAL LESSIVING PROCESS |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE7612248A SE7612248L (en) | 1976-11-03 | 1976-11-03 | BOILING OF LIGNOCELLULOSE-MATERIALS |
Publications (1)
Publication Number | Publication Date |
---|---|
SE7612248L true SE7612248L (en) | 1978-05-04 |
Family
ID=20329328
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE7612248A SE7612248L (en) | 1976-11-03 | 1976-11-03 | BOILING OF LIGNOCELLULOSE-MATERIALS |
Country Status (8)
Country | Link |
---|---|
JP (1) | JPS5358004A (en) |
BR (1) | BR7707297A (en) |
CA (1) | CA1096560A (en) |
FI (1) | FI773115A (en) |
FR (1) | FR2370121A1 (en) |
NO (1) | NO773750L (en) |
NZ (1) | NZ185406A (en) |
SE (1) | SE7612248L (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE413785B (en) * | 1978-09-22 | 1980-06-23 | Mo Och Domsjoe Ab | PROCEDURE FOR CONTAINING LIGNOCELLULOSALLY MATERIALS BY ALKALK COOKING IN THE PRESENT OF AN ADDITIVE SUBSTANCE OF REDOX TYPE |
DE3212767A1 (en) * | 1982-04-06 | 1983-10-06 | Nicolaus Md Verwaltungsges | METHOD AND REACTOR FOR CONTINUOUSLY UNLOCKING PLANT FIBER MATERIAL |
JPS6081400A (en) * | 1983-10-11 | 1985-05-09 | 本州製紙株式会社 | Packing material of metals |
AU591509B2 (en) * | 1985-08-05 | 1989-12-07 | Interox Societe Anonyme | Process for the delignification of cellulosic substances |
BRPI0711473A2 (en) * | 2006-05-19 | 2011-11-16 | Univ New York State Res Found | method of treating crushed cellulosic fibrous material, and pulp |
US8303767B2 (en) | 2008-03-18 | 2012-11-06 | The Research Foundation Of State University Of New York | Methods of pretreating comminuted cellulosic material with carbonate-containing solutions |
-
1976
- 1976-11-03 SE SE7612248A patent/SE7612248L/en unknown
-
1977
- 1977-10-11 NZ NZ185406A patent/NZ185406A/en unknown
- 1977-10-20 FI FI773115A patent/FI773115A/en not_active Application Discontinuation
- 1977-10-21 JP JP12665877A patent/JPS5358004A/en active Pending
- 1977-10-31 BR BR7707297A patent/BR7707297A/en unknown
- 1977-11-01 CA CA289,976A patent/CA1096560A/en not_active Expired
- 1977-11-02 FR FR7732940A patent/FR2370121A1/en active Granted
- 1977-11-02 NO NO773750A patent/NO773750L/en unknown
Also Published As
Publication number | Publication date |
---|---|
FR2370121A1 (en) | 1978-06-02 |
NZ185406A (en) | 1980-10-08 |
BR7707297A (en) | 1978-08-08 |
JPS5358004A (en) | 1978-05-25 |
CA1096560A (en) | 1981-03-03 |
NO773750L (en) | 1978-05-05 |
FI773115A (en) | 1978-05-04 |
FR2370121B1 (en) | 1982-11-19 |
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