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NO168843C - PROCEDURE FOR AA REDUCE THE QUANTITY OF FREE PREPARED HEADWORK MANUFACTURING PAPER, AND Means FOR USING THE PROCEDURE - Google Patents

PROCEDURE FOR AA REDUCE THE QUANTITY OF FREE PREPARED HEADWORK MANUFACTURING PAPER, AND Means FOR USING THE PROCEDURE

Info

Publication number
NO168843C
NO168843C NO860558A NO860558A NO168843C NO 168843 C NO168843 C NO 168843C NO 860558 A NO860558 A NO 860558A NO 860558 A NO860558 A NO 860558A NO 168843 C NO168843 C NO 168843C
Authority
NO
Norway
Prior art keywords
procedure
headwork
reduce
manufacturing paper
sulphite
Prior art date
Application number
NO860558A
Other languages
Norwegian (no)
Other versions
NO168843B (en
NO860558L (en
Inventor
Ulla Helmer
Original Assignee
Eka Nobel Ab
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Eka Nobel Ab filed Critical Eka Nobel Ab
Publication of NO860558L publication Critical patent/NO860558L/en
Publication of NO168843B publication Critical patent/NO168843B/en
Publication of NO168843C publication Critical patent/NO168843C/en

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)
  • Golf Clubs (AREA)
  • Toys (AREA)
  • Luminescent Compositions (AREA)
  • Steroid Compounds (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Making Paper Articles (AREA)

Abstract

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.
NO860558A 1985-02-15 1986-02-14 PROCEDURE FOR AA REDUCE THE QUANTITY OF FREE PREPARED HEADWORK MANUFACTURING PAPER, AND Means FOR USING THE PROCEDURE NO168843C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8500715A SE8500715L (en) 1985-02-15 1985-02-15 SET FOR PAPER MAKING

Publications (3)

Publication Number Publication Date
NO860558L NO860558L (en) 1986-08-18
NO168843B NO168843B (en) 1991-12-30
NO168843C true NO168843C (en) 1992-04-08

Family

ID=20359131

Family Applications (1)

Application Number Title Priority Date Filing Date
NO860558A NO168843C (en) 1985-02-15 1986-02-14 PROCEDURE FOR AA REDUCE THE QUANTITY OF FREE PREPARED HEADWORK MANUFACTURING PAPER, AND Means FOR USING THE PROCEDURE

Country Status (7)

Country Link
EP (1) EP0192623B1 (en)
AT (1) ATE57965T1 (en)
DE (1) DE3675231D1 (en)
ES (1) ES8801401A1 (en)
FI (1) FI84635C (en)
NO (1) NO168843C (en)
SE (1) SE8500715L (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT947732B (en) * 1971-02-27 1973-05-30 Asahi Chemical Ind PROCESS FOR THE TREATMENT OF ALDEHYDES
FR2306944A1 (en) * 1975-04-09 1976-11-05 Speichim Formaldehyde and phenol removal from waste waters - by treating with formaldehyde blocking agent, evaporating and incinerating concentrate
US4409375A (en) * 1982-02-11 1983-10-11 Champion International Corporation Method for scavenging aldehydes
DE3222195A1 (en) * 1982-06-12 1983-12-15 Basf Ag, 6700 Ludwigshafen METHOD FOR THE PRODUCTION OF CHIPWOOD MATERIALS WITH REDUCED FORMALDEHYDEMISSION

Also Published As

Publication number Publication date
ES8801401A1 (en) 1987-12-16
ES552021A0 (en) 1987-12-16
FI860650L (en) 1986-08-16
FI860650A0 (en) 1986-02-12
NO168843B (en) 1991-12-30
FI84635C (en) 1993-07-28
NO860558L (en) 1986-08-18
DE3675231D1 (en) 1990-12-06
FI84635B (en) 1991-09-13
EP0192623A1 (en) 1986-08-27
SE8500715L (en) 1986-08-16
EP0192623B1 (en) 1990-10-31
ATE57965T1 (en) 1990-11-15
SE8500715D0 (en) 1985-02-15

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Legal Events

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MM1K Lapsed by not paying the annual fees

Free format text: LAPSED IN AUGUST 2002