CA1050212A - Method of increasing pulp yield and viscosity - Google Patents
Method of increasing pulp yield and viscosityInfo
- Publication number
- CA1050212A CA1050212A CA209,440A CA209440A CA1050212A CA 1050212 A CA1050212 A CA 1050212A CA 209440 A CA209440 A CA 209440A CA 1050212 A CA1050212 A CA 1050212A
- Authority
- CA
- Canada
- Prior art keywords
- cyanide
- treatment
- accordance
- conducted
- pulp
- 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
- D21C1/00—Pretreatment of the finely-divided materials before digesting
- D21C1/06—Pretreatment of the finely-divided materials before digesting with alkaline reacting compounds
Landscapes
- Paper (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US49673474A | 1974-08-12 | 1974-08-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1050212A true CA1050212A (en) | 1979-03-13 |
Family
ID=23973900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA209,440A Expired CA1050212A (en) | 1974-08-12 | 1974-09-17 | Method of increasing pulp yield and viscosity |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS5126303A (enExample) |
| CA (1) | CA1050212A (enExample) |
| DE (1) | DE2505004A1 (enExample) |
| FI (1) | FI750314A7 (enExample) |
| FR (1) | FR2282017A1 (enExample) |
| GB (1) | GB1501456A (enExample) |
| IT (1) | IT1027406B (enExample) |
| NO (1) | NO750369L (enExample) |
| SE (1) | SE7501239L (enExample) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61167292U (enExample) * | 1986-03-20 | 1986-10-17 |
-
1974
- 1974-09-17 CA CA209,440A patent/CA1050212A/en not_active Expired
-
1975
- 1975-01-29 IT IT67214/75A patent/IT1027406B/it active
- 1975-02-05 NO NO750369A patent/NO750369L/no unknown
- 1975-02-05 SE SE7501239A patent/SE7501239L/xx unknown
- 1975-02-05 FI FI750314A patent/FI750314A7/fi not_active Application Discontinuation
- 1975-02-06 FR FR7503747A patent/FR2282017A1/fr not_active Withdrawn
- 1975-02-06 DE DE19752505004 patent/DE2505004A1/de active Pending
- 1975-02-06 JP JP50015846A patent/JPS5126303A/ja active Pending
- 1975-02-06 GB GB5048/75A patent/GB1501456A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| IT1027406B (it) | 1978-11-20 |
| DE2505004A1 (de) | 1976-02-26 |
| NO750369L (enExample) | 1976-02-13 |
| GB1501456A (en) | 1978-02-15 |
| SE7501239L (sv) | 1976-02-13 |
| JPS5126303A (enExample) | 1976-03-04 |
| FI750314A7 (enExample) | 1976-02-13 |
| FR2282017A1 (fr) | 1976-03-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3944463A (en) | Pulping of lignocellulosic material with oxygen in two stages at increasing pH | |
| CA2651483C (en) | Methods for carbonate pretreatment and pulping of cellulosic material | |
| CA2221619A1 (en) | Modified organosolv pulping | |
| US5470433A (en) | Process for the delignification of cellulose fiber raw materials using alcohol and alkali | |
| US3691008A (en) | Two-stage soda-oxygen pulping | |
| US4552616A (en) | Pulping process pretreatment using a lower alkanolamine in the presence of ammonium hydroxide | |
| US4091749A (en) | Alkaline pulping of lignocellulosic material with amine pretreatment | |
| JP2588495B2 (ja) | 製紙用高収率高漂白度パルプの製造方法 | |
| CA1050212A (en) | Method of increasing pulp yield and viscosity | |
| US5183535A (en) | Process for preparing kraft pulp using black liquor pretreatment reaction | |
| US3695994A (en) | Impregnation of wood chips with a cellulose protector followed by a soda-oxygen pulping stage | |
| US4045280A (en) | Alkaline pulping of lignocellulosic material with amine and nitrate pretreatment | |
| EP0517689A1 (en) | Multi-level sulfide content | |
| CA1080914A (en) | Pulping of hardwood with sodium sulfide and sodium hydroxide while generating hydrogen sulfide in situ in the initial pulping stages | |
| AU639304B2 (en) | Process for preparing kraft pulp | |
| US3567572A (en) | Polysulfide liquor impregnation of lignocellulose materials in a multistage pulping process | |
| US5326433A (en) | Multi-level sulfide content white liquor production and utilization in cellulose pulping | |
| US3874991A (en) | Polysulfide impregnation of lignocellulosic materials in a continuous digester | |
| US4130457A (en) | Method of pulping with polysulfide | |
| CA1096559A (en) | Process for pretreating particulate lignocellulosic material | |
| US20020088573A1 (en) | Pulping process | |
| US4750973A (en) | Process for reducing carbohydrate losses in the sulfate pulping of wood by pretreating the wood with oxygen and nitrogen oxides | |
| US3795574A (en) | Impregnation of wood with a formaldehyde free alkaline solution of sodium hydroxide at a ph between 12.4 and 13 | |
| CA2430389C (en) | Improved kraft pulp yield by heat treatment of polysulphide liquors generated by oxidation | |
| CA1240812A (en) | Process for producing nitrogen oxides from aqueous waste cellulose pulp liquor containing nitrogen compounds |