EP 0192623 A1 19860827 - A method at the production of paper.
Title (en)
A method at the production of paper.
Title (de)
Verfahren zur Papierherstellung.
Title (fr)
Méthode pour la fabrication de papier.
Publication
Application
Priority
SE 8500715 A 19850215
Abstract (en)
Sulphite, and preferably sodium sulphite and sodium bisulphite, is used as absorbing agent for aldehydes at the production of paper. The sulphite is added to the stock or the process water in combination with a cationic retention agent, such as eg alum. A product suitable for use at the production of paper is an aqueous solution of a combination of sulphite and a cationic retention agent, preferably alum.
IPC 1-7
IPC 8 full level
D21F 1/66 (2006.01); D21H 17/66 (2006.01)
CPC (source: EP)
D21H 17/66 (2013.01)
Citation (search report)
- [A] US 3829379 A 19740813 - ISHIDA S, et al
- [A] FR 2306944 A1 19761105 - SPEICHIM [FR]
- [AD] US 4409375 A 19831011 - HARTMAN SEYMOUR [US], et al
- [AD] EP 0096797 A2 19831228 - BASF AG [DE]
Designated contracting state (EPC)
AT BE DE FR GB NL SE
DOCDB simple family (publication)
EP 0192623 A1 19860827; EP 0192623 B1 19901031; AT E57965 T1 19901115; DE 3675231 D1 19901206; ES 552021 A0 19871216; ES 8801401 A1 19871216; FI 84635 B 19910913; FI 84635 C 19930728; FI 860650 A0 19860212; FI 860650 A 19860816; NO 168843 B 19911230; NO 168843 C 19920408; NO 860558 L 19860818; SE 8500715 D0 19850215; SE 8500715 L 19860816
DOCDB simple family (application)
EP 86850039 A 19860207; AT 86850039 T 19860207; DE 3675231 T 19860207; ES 552021 A 19860214; FI 860650 A 19860212; NO 860558 A 19860214; SE 8500715 A 19850215