ATE150814T1 - Verfahren zum trennen von natriumhydroxyd aus weisslauge - Google Patents

Verfahren zum trennen von natriumhydroxyd aus weisslauge

Info

Publication number: ATE150814T1
Authority: AT; Austria
Prior art keywords: white liquor; sodium hydroxide; sodium hydroxyde; separating sodium; white
Prior art date: 1993-10-20

Application number

AT94850182T

Other languages

English (en)

Inventor

Marjo Toeroenen

Hannu Kurittu

Original Assignee

Enso Gutzeit Oy

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.)

1993-10-20

Filing date

1994-10-20

Publication date

1997-04-15

1994-10-20 Application filed by Enso Gutzeit Oy filed Critical Enso Gutzeit Oy

1997-04-15 Application granted granted Critical

1997-04-15 Publication of ATE150814T1 publication Critical patent/ATE150814T1/de

Links

HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 title abstract 11
238000000034 method Methods 0.000 title abstract 5
238000000502 dialysis Methods 0.000 abstract 1
238000009792 diffusion process Methods 0.000 abstract 1
229910052979 sodium sulfide Inorganic materials 0.000 abstract 1
GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 abstract 1
239000000126 substance Substances 0.000 abstract 1

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
- D21C11/00—Regeneration of pulp liquors or effluent waste waters
- D21C11/0064—Aspects concerning the production and the treatment of green and white liquors, e.g. causticizing green liquor
- D21C11/0078—Treatment of green or white liquors with other means or other compounds than gases, e.g. in order to separate solid compounds such as sodium chloride and carbonate from these liquors; Further treatment of these compounds

Landscapes

Paper (AREA)
Removal Of Specific Substances (AREA)
Separation Using Semi-Permeable Membranes (AREA)

AT94850182T 1993-10-20 1994-10-20 Verfahren zum trennen von natriumhydroxyd aus weisslauge ATE150814T1 (de)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
FI934632A FI98537C (fi)	1993-10-20	1993-10-20	Menetelmä valkolipeässä olevan natriumhydroksidin erottamiseksi

Publications (1)

Publication Number	Publication Date
ATE150814T1 true ATE150814T1 (de)	1997-04-15

Family

ID=8538808

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
AT94850182T ATE150814T1 (de)	1993-10-20	1994-10-20	Verfahren zum trennen von natriumhydroxyd aus weisslauge

Country Status (7)

Country	Link
US (1)	US5510035A (de)
EP (1)	EP0654558B1 (de)
AT (1)	ATE150814T1 (de)
CA (1)	CA2118464C (de)
DE (1)	DE69402289T2 (de)
ES (1)	ES2100661T3 (de)
FI (1)	FI98537C (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FI98538C (fi) *	1993-10-20	1997-07-10	Enso Gutzeit Oy	Menetelmä natriumhydroksidin valmistamiseksi valkolipeästä
US5942084A (en) *	1997-01-24	1999-08-24	Pulp And Paper Research Institute Of Canada	Process for the separation of sulphides from pulping liquors using amphoteric resins
FI122626B (fi) *	2006-03-31	2012-04-30	Laennen Tutkimus Western Res Inc Oy	Kemiallisen massan valkaisumenetelmä
WO2014086049A1 (zh) *	2012-12-09	2014-06-12	李广	一种去除碱回收苛化洗后白泥活性残余碱的方法
AU2016270905B2 (en) *	2015-06-02	2021-06-03	Conocophillips Company	Method of removing hydrogen sulfide from water

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2302270A (en) *	1938-04-12	1942-11-17	Skolnik Max	Pulp making process
US4024229A (en) *	1970-11-06	1977-05-17	The Mead Corporation	Production of polysulfide with PTFE coated catalyst
US3988198A (en) *	1973-05-31	1976-10-26	International Telephone And Telegraph Corporation	Method for treating hemi caustic effluents
FI53728C (fi) *	1974-03-12	1978-07-10	Ahlstroem Oy	Foerfarande foer aotervinning av kemikalier ur avlutar fraon sulfatcellulosakok och avfallsvatten fraon blekning
SE434283B (sv) *	1982-12-01	1984-07-16	Mo Och Domsjoe Ab	Forfarande for delignifiering av cellulosamassa med kveveoxider och syrgas
US4519881A (en) *	1984-06-25	1985-05-28	Standard Oil Company (Indiana)	Regeneration of alkaline treating agents
CA1335976C (en) *	1989-05-31	1995-06-20	Mahmoud Kamran Azarniouch	Recovery of naoh and other values from spent liquors and bleach plant effluents

1993
- 1993-10-20 FI FI934632A patent/FI98537C/fi not_active IP Right Cessation
1994
- 1994-10-18 US US08/325,655 patent/US5510035A/en not_active Expired - Fee Related
- 1994-10-19 CA CA002118464A patent/CA2118464C/en not_active Expired - Fee Related
- 1994-10-20 ES ES94850182T patent/ES2100661T3/es not_active Expired - Lifetime
- 1994-10-20 DE DE69402289T patent/DE69402289T2/de not_active Expired - Fee Related
- 1994-10-20 AT AT94850182T patent/ATE150814T1/de not_active IP Right Cessation
- 1994-10-20 EP EP94850182A patent/EP0654558B1/de not_active Expired - Lifetime

Also Published As

Publication number	Publication date
FI98537C (fi)	1997-07-10
US5510035A (en)	1996-04-23
DE69402289D1 (de)	1997-04-30
DE69402289T2 (de)	1997-10-30
FI98537B (fi)	1997-03-27
CA2118464A1 (en)	1995-04-21
ES2100661T3 (es)	1997-06-16
EP0654558B1 (de)	1997-03-26
EP0654558A1 (de)	1995-05-24
FI934632L (fi)	1995-04-21
CA2118464C (en)	2005-10-18
FI934632A0 (fi)	1993-10-20

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Legal Events

Date	Code	Title	Description
1997-09-15	UEP	Publication of translation of european patent specification
2008-07-15	REN	Ceased due to non-payment of the annual fee