GB1112617A - Recovery of sodium chloride in the production of bleached pulp - Google Patents
Recovery of sodium chloride in the production of bleached pulpInfo
- Publication number
- GB1112617A GB1112617A GB49698/65A GB4969865A GB1112617A GB 1112617 A GB1112617 A GB 1112617A GB 49698/65 A GB49698/65 A GB 49698/65A GB 4969865 A GB4969865 A GB 4969865A GB 1112617 A GB1112617 A GB 1112617A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sodium
- sodium chloride
- sulphate
- fume
- water
- 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
- D21C11/00—Regeneration of pulp liquors or effluent waste waters
- D21C11/06—Treatment of pulp gases; Recovery of the heat content of the gases; Treatment of gases arising from various sources in pulp and paper mills; Regeneration of gaseous SO2, e.g. arising from liquors containing sulfur compounds
- D21C11/063—Treatment of gas streams comprising solid matter, e.g. the ashes resulting from the combustion of black liquor
- D21C11/066—Separation of solid compounds from these gases; further treatment of recovered products
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/40—Production or processing of lime, e.g. limestone regeneration of lime in pulp and sugar mills
Landscapes
- Paper (AREA)
Abstract
In a process for pulping of cellulosic materials wherein the cellulosic material is digested in known manner with an aqueous solution containing sodium hydroxide and/or sodium sulphide, and the spent digestion liquor is sent to a recovery system wherein it is evaporated and heated in a furnace to produce a smelt, which is dissolved in water, clarified and causticized in known manner, and a fume containing sodium chloride and sodium sulphate, the fume is leached with water to produce a solution rich in sodium chloride. Instead of water, a saturated solution of sodium sulphate can be used to increase the separation of chloride from sulphate in the fume. The sodium chloride solution thus obtained may be used for the generation of a mixture of chlorine and chlorine dioxide by the reaction of sodium chloride, sodium chlorate and sulphuric acid, which mixture is then used to bleach the digested cellulosic material. The solids remaining from the leaching process, consisting mostly of sodium sulphate, may be recycled to the furnace, or employed to provide sulphuric acid and/or sodium hydroxide.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB49698/65A GB1112617A (en) | 1965-11-23 | 1965-11-23 | Recovery of sodium chloride in the production of bleached pulp |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB49698/65A GB1112617A (en) | 1965-11-23 | 1965-11-23 | Recovery of sodium chloride in the production of bleached pulp |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1112617A true GB1112617A (en) | 1968-05-08 |
Family
ID=10453241
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB49698/65A Expired GB1112617A (en) | 1965-11-23 | 1965-11-23 | Recovery of sodium chloride in the production of bleached pulp |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1112617A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4914701A (en) * | 1972-06-12 | 1974-02-08 | ||
US3833462A (en) * | 1971-03-15 | 1974-09-03 | Mac Millan Bloedel Ltd | Process of removing sodium chloride from kraft pulping process chemical recovery systems |
JPS503801B1 (en) * | 1971-04-19 | 1975-02-10 | ||
US3996097A (en) * | 1975-08-15 | 1976-12-07 | Hooker Chemicals & Plastics Corporation | Kraft mill recovery system |
US5961803A (en) * | 1995-07-12 | 1999-10-05 | Eka Chemicals Ab | Leaching process |
EP1302529A1 (en) * | 2001-10-09 | 2003-04-16 | Linde AG | Brine separation in tall soap oil preparation |
-
1965
- 1965-11-23 GB GB49698/65A patent/GB1112617A/en not_active Expired
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3833462A (en) * | 1971-03-15 | 1974-09-03 | Mac Millan Bloedel Ltd | Process of removing sodium chloride from kraft pulping process chemical recovery systems |
JPS503801B1 (en) * | 1971-04-19 | 1975-02-10 | ||
JPS4914701A (en) * | 1972-06-12 | 1974-02-08 | ||
JPS507161B2 (en) * | 1972-06-12 | 1975-03-22 | ||
US3996097A (en) * | 1975-08-15 | 1976-12-07 | Hooker Chemicals & Plastics Corporation | Kraft mill recovery system |
US5961803A (en) * | 1995-07-12 | 1999-10-05 | Eka Chemicals Ab | Leaching process |
EP1302529A1 (en) * | 2001-10-09 | 2003-04-16 | Linde AG | Brine separation in tall soap oil preparation |
WO2003031545A1 (en) * | 2001-10-09 | 2003-04-17 | Linde Ag | Brine separation in tall soap oil preparation |
US7084238B2 (en) | 2001-10-09 | 2006-08-01 | Linde Aktiengesellschaft | Brine separation in tall soap oil preparation |
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