ES8801401A1 - Un metodo para reducir la cantidad de aldehido libre en la produccion de papel - Google Patents
Un metodo para reducir la cantidad de aldehido libre en la produccion de papelInfo
- Publication number
- ES8801401A1 ES8801401A1 ES552021A ES552021A ES8801401A1 ES 8801401 A1 ES8801401 A1 ES 8801401A1 ES 552021 A ES552021 A ES 552021A ES 552021 A ES552021 A ES 552021A ES 8801401 A1 ES8801401 A1 ES 8801401A1
- Authority
- ES
- Spain
- Prior art keywords
- sulphite
- paper
- production
- combination
- alum
- 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
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/66—Salts, e.g. alums
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Paper (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Steroid Compounds (AREA)
- Luminescent Compositions (AREA)
- Golf Clubs (AREA)
- Toys (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Making Paper Articles (AREA)
Abstract
METODO DE REDUCCION DE ALDEHIDO LIBRE. CONSISTE EN AÑADIR SULFITO SODICO O BISULFITO SODICO A MATERIA PRIMA DE PAPEL O AL AGUA DE PROCESO, EN COMBINACION CON UN AGENTE DE RETENCION CATIONICO, TAL COMO ALUMBRE, EN CANTIDAD SUFICIENTE PARA FORMAR UN COMPLEJO CON EL SULFITO, SIENDO ESTE EL QUE REACCIONA CON EL ALDEHIDO. TIENE APLICACIONES EN EL PROCESO DE FABRICACION DE PAPEL.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8500715A SE8500715L (sv) | 1985-02-15 | 1985-02-15 | Sett vid pappersframstellning |
Publications (2)
Publication Number | Publication Date |
---|---|
ES8801401A1 true ES8801401A1 (es) | 1987-12-16 |
ES552021A0 ES552021A0 (es) | 1987-12-16 |
Family
ID=20359131
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES552021A Expired ES8801401A1 (es) | 1985-02-15 | 1986-02-14 | Un metodo para reducir la cantidad de aldehido libre en la produccion de papel |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0192623B1 (es) |
AT (1) | ATE57965T1 (es) |
DE (1) | DE3675231D1 (es) |
ES (1) | ES8801401A1 (es) |
FI (1) | FI84635C (es) |
NO (1) | NO168843C (es) |
SE (1) | SE8500715L (es) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5326479A (en) * | 1993-09-01 | 1994-07-05 | Nalco Chemical Company | Treatment of pulp and paper wastewater with reducing agent and a polymer for color removal |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT947732B (it) * | 1971-02-27 | 1973-05-30 | Asahi Chemical Ind | Processo per il trattamento delle aldeidi |
FR2306944A1 (fr) * | 1975-04-09 | 1976-11-05 | Speichim | Procede de traitement d'eaux residuaires formophenoliques |
US4409375A (en) * | 1982-02-11 | 1983-10-11 | Champion International Corporation | Method for scavenging aldehydes |
DE3222195A1 (de) * | 1982-06-12 | 1983-12-15 | Basf Ag, 6700 Ludwigshafen | Verfahren zur herstellung von spanholzwerkstoffen mit verringerter formaldehydemission |
-
1985
- 1985-02-15 SE SE8500715A patent/SE8500715L/ not_active Application Discontinuation
-
1986
- 1986-02-07 EP EP86850039A patent/EP0192623B1/en not_active Expired - Lifetime
- 1986-02-07 DE DE8686850039T patent/DE3675231D1/de not_active Expired - Fee Related
- 1986-02-07 AT AT86850039T patent/ATE57965T1/de not_active IP Right Cessation
- 1986-02-12 FI FI860650A patent/FI84635C/fi not_active IP Right Cessation
- 1986-02-14 ES ES552021A patent/ES8801401A1/es not_active Expired
- 1986-02-14 NO NO860558A patent/NO168843C/no not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
SE8500715D0 (sv) | 1985-02-15 |
NO860558L (no) | 1986-08-18 |
EP0192623B1 (en) | 1990-10-31 |
FI84635C (fi) | 1993-07-28 |
EP0192623A1 (en) | 1986-08-27 |
NO168843C (no) | 1992-04-08 |
SE8500715L (sv) | 1986-08-16 |
ES552021A0 (es) | 1987-12-16 |
FI860650A0 (fi) | 1986-02-12 |
ATE57965T1 (de) | 1990-11-15 |
FI84635B (fi) | 1991-09-13 |
DE3675231D1 (de) | 1990-12-06 |
FI860650A (fi) | 1986-08-16 |
NO168843B (no) | 1991-12-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PC1A | Transfer granted |