GB1112617A - Recovery of sodium chloride in the production of bleached pulp - Google Patents

Recovery of sodium chloride in the production of bleached pulp

Info

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
Application number
GB49698/65A
Inventor
Richard Line Hummel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Electric Reduction Company of Canada Ltd
Original Assignee
Electric Reduction Company of Canada Ltd
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 Electric Reduction Company of Canada Ltd filed Critical Electric Reduction Company of Canada Ltd
Priority to GB49698/65A priority Critical patent/GB1112617A/en
Publication of GB1112617A publication Critical patent/GB1112617A/en
Expired legal-status Critical Current

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.
GB49698/65A 1965-11-23 1965-11-23 Recovery of sodium chloride in the production of bleached pulp Expired GB1112617A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (9)

* Cited by examiner, † Cited by third party
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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