ES472687A1 - Procedimiento para la preparacion de una celulosa al sulfito - Google Patents
Procedimiento para la preparacion de una celulosa al sulfitoInfo
- Publication number
- ES472687A1 ES472687A1 ES472687A ES472687A ES472687A1 ES 472687 A1 ES472687 A1 ES 472687A1 ES 472687 A ES472687 A ES 472687A ES 472687 A ES472687 A ES 472687A ES 472687 A1 ES472687 A1 ES 472687A1
- Authority
- ES
- Spain
- Prior art keywords
- production
- pulp
- further processing
- special papers
- softwood 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
- 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
- D21C9/08—Removal of fats, resins, pitch or waxes; Chemical or physical purification, i.e. refining, of crude cellulose by removing non-cellulosic contaminants, optionally combined with bleaching
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Cosmetics (AREA)
- Sanitary Thin Papers (AREA)
Abstract
Procedimiento para la preparación de una celulosa al sulfito de madera de coníferas, de viscosidad desde media a alta, que se caracteriza porque la celulosa obtenida según un procedimiento de disgregación con sulfito, es tratada eventualmente con una cantidad de cloro que corresponde a 0,01 hasta 20% en peso de la cantidad de cloro que se utiliza en los procedimientos clásicos de blanqueo, y/o se trata previamente de forma eventual con un ácido, la celulosa no deslignificada adicionalmente, o sólo ligeramente, mediante este tratamiento con cloro, es sometido de manera conocida en sí a un ennoblecimiento por medio de un álcali a temperatura elevada, a continuación se deslignifica con peróxido en un medio alcalino acuoso y se blanquea posteriormente en una o en varias etapas, de manera conocida en sí.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2742262A DE2742262C2 (de) | 1977-09-20 | 1977-09-20 | Verfahren zur Herstellung eines mittel- bis hochviskosen Nadelholz-Sulfitzellstoffs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES472687A1 true ES472687A1 (es) | 1979-02-16 |
Family
ID=6019413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES472687A Expired ES472687A1 (es) | 1977-09-20 | 1978-08-18 | Procedimiento para la preparacion de una celulosa al sulfito |
Country Status (16)
| Country | Link |
|---|---|
| JP (1) | JPS5455606A (es) |
| AR (1) | AR218936A1 (es) |
| AT (1) | AT367812B (es) |
| BE (1) | BE870607A (es) |
| BR (1) | BR7806050A (es) |
| CA (1) | CA1133660A (es) |
| CH (1) | CH638003A5 (es) |
| DE (1) | DE2742262C2 (es) |
| ES (1) | ES472687A1 (es) |
| FI (1) | FI68273C (es) |
| FR (1) | FR2403418A1 (es) |
| GB (1) | GB2005743B (es) |
| IT (1) | IT1109111B (es) |
| NO (1) | NO153978C (es) |
| SE (1) | SE7809831L (es) |
| ZA (1) | ZA785356B (es) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2520397A1 (fr) * | 1982-01-28 | 1983-07-29 | Centre Tech Ind Papier | Procede pour le traitement de pates papetieres chimiques |
| DE4031597A1 (de) * | 1990-10-05 | 1992-04-09 | Sueddeutsche Kalkstickstoff | Verfahren zur chlorarmen bleiche und delignifizierung von zellstoff |
| SE470065C (sv) * | 1991-04-30 | 1995-10-12 | Eka Nobel Ab | Behandling av kemisk massa med en syra och därefter en magnesium- och kalciumförening vid klorfri blekning |
| US6398908B1 (en) | 1991-04-30 | 2002-06-04 | Eka Nobel Ab | Process for acid bleaching of lignocellulose-containing pulp with a magnesium compound |
| DE102007036376A1 (de) * | 2007-07-31 | 2009-02-05 | Voith Patent Gmbh | Gebleichter Faserstoff |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2026068A (en) * | 1929-09-11 | 1935-12-31 | Du Pont | Process for the improvement of cellulose |
| DE753531C (de) * | 1938-11-09 | 1953-05-18 | Degussa | Verfahren zum Bleichen von Zellstoff |
-
1977
- 1977-09-20 DE DE2742262A patent/DE2742262C2/de not_active Expired
-
1978
- 1978-08-18 ES ES472687A patent/ES472687A1/es not_active Expired
- 1978-08-18 NO NO782820A patent/NO153978C/no unknown
- 1978-08-21 FR FR7824288A patent/FR2403418A1/fr active Granted
- 1978-09-15 BR BR7806050A patent/BR7806050A/pt unknown
- 1978-09-19 CH CH978978A patent/CH638003A5/de not_active IP Right Cessation
- 1978-09-19 GB GB7837320A patent/GB2005743B/en not_active Expired
- 1978-09-19 IT IT69162/78A patent/IT1109111B/it active
- 1978-09-19 SE SE7809831A patent/SE7809831L/xx unknown
- 1978-09-19 BE BE6046608A patent/BE870607A/xx not_active IP Right Cessation
- 1978-09-19 AT AT0675678A patent/AT367812B/de not_active IP Right Cessation
- 1978-09-20 ZA ZA00785356A patent/ZA785356B/xx unknown
- 1978-09-20 FI FI782869A patent/FI68273C/fi not_active IP Right Cessation
- 1978-09-20 CA CA311,653A patent/CA1133660A/en not_active Expired
- 1978-09-20 JP JP11470478A patent/JPS5455606A/ja active Pending
- 1978-09-20 AR AR273785A patent/AR218936A1/es active
Also Published As
| Publication number | Publication date |
|---|---|
| CA1133660A (en) | 1982-10-19 |
| JPS5455606A (en) | 1979-05-02 |
| DE2742262A1 (de) | 1979-03-29 |
| GB2005743A (en) | 1979-04-25 |
| ZA785356B (en) | 1979-09-26 |
| NO153978B (no) | 1986-03-17 |
| GB2005743B (en) | 1982-03-03 |
| BE870607A (fr) | 1979-03-19 |
| DE2742262C2 (de) | 1982-06-09 |
| NO153978C (no) | 1986-06-25 |
| NO782820L (no) | 1979-03-21 |
| AR218936A1 (es) | 1980-07-15 |
| AT367812B (de) | 1982-08-10 |
| FI68273C (fi) | 1985-08-12 |
| IT1109111B (it) | 1985-12-16 |
| FR2403418B1 (es) | 1982-07-02 |
| BR7806050A (pt) | 1979-05-02 |
| FR2403418A1 (fr) | 1979-04-13 |
| FI782869A (fi) | 1979-03-21 |
| ATA675678A (de) | 1981-12-15 |
| IT7869162A0 (it) | 1978-09-19 |
| FI68273B (fi) | 1985-04-30 |
| SE7809831L (sv) | 1979-03-21 |
| CH638003A5 (de) | 1983-08-31 |
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| ES8704569A1 (es) | Procedimiento de disgregacion con sulfito para la preparacion de celulosa a partir de materiales que contienen lignocelulosa con recuperacion de los productos quimicos de disgregacion | |
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| GB1110053A (en) | Improvements in or relating to methods of preparing cellulose pulp, notably paper pulp, and products thus obtained and materials deriving therefrom | |
| SU568691A1 (ru) | Способ обработки предгидролизной сульфатной целлюлозы | |
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| GB518887A (en) | A process for the production of pulp material from wood, straw, grasses and similar cellulose containing plants | |
| SU503966A1 (ru) | Способ получени целлюлозного волокнистого полуфабриката | |
| CA527686A (en) | Treatment of residual waste liquor from sulphite process of making pulp |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FD1A | Patent lapsed |
Effective date: 19990201 |