GB717600A - Process for the recovery of sodium from waste sulphite liquor - Google Patents

Process for the recovery of sodium from waste sulphite liquor

Info

Publication number
GB717600A
GB717600A GB1178/52A GB117852A GB717600A GB 717600 A GB717600 A GB 717600A GB 1178/52 A GB1178/52 A GB 1178/52A GB 117852 A GB117852 A GB 117852A GB 717600 A GB717600 A GB 717600A
Authority
GB
United Kingdom
Prior art keywords
sodium
solution
sulphurous acid
ion exchange
sulphide
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
GB1178/52A
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.)
Abitibi Power and Paper Co Ltd
Original Assignee
Abitibi Power and Paper Co 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 Abitibi Power and Paper Co Ltd filed Critical Abitibi Power and Paper Co Ltd
Publication of GB717600A publication Critical patent/GB717600A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
    • C01D5/00—Sulfates or sulfites of sodium, potassium or alkali metals in general
    • C01D5/14—Preparation of sulfites

Abstract

The waste liquor from a sodium sulphite process of preparing wood pulp is concentrated, burned and smelted, sodium is extracted, predominently as sodium sulphide, in aqueous solution, and then adsorbed from the solution with a weakly acidic ion exchange material in the hydrogen form, whereupon the exchange material is regenerated with a sulphurous acid solution to produce a solution of sodium bisulphite and sulphurous acid for reuse in the pulping process. Chloride ions which may be present in the wood as sodium chloride are thus eliminated from the cycle. In carrying out the process wood chips are pulped with the recycled solution and fresh sulphurous acid, the processed pulp is removed and the liquors passed to evaporators. Salt cake or sodium carbonate is added to compensate for loss of sodium, and the concentrated liquor passed to a furnace wherein a sodium sulphide smelt is formed under reducing conditions. The pH of the solution of the smelt passing to the ion exchange columns is preferably above 6, and that of the regenerating sulphurous acid solution is less than 4. Hydrogen sulphide evolved during the adsorption process is burned with added sulphur to produce sulphur dioxide from which the regenerating sulphurous acid solution is obtained. If desired, sodium losses can be replaced by adsorbing in the ion exchange column sodium from other solutions, e.g. from the waste liquors used in the purification of unbleached pulps. Specification 469,051, [Group IV], is referred to. Reference has been directed by the Comptroller to Specification 684,224.
GB1178/52A 1951-01-15 1952-01-15 Process for the recovery of sodium from waste sulphite liquor Expired GB717600A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA717600X 1951-01-15

Publications (1)

Publication Number Publication Date
GB717600A true GB717600A (en) 1954-10-27

Family

ID=4172248

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1178/52A Expired GB717600A (en) 1951-01-15 1952-01-15 Process for the recovery of sodium from waste sulphite liquor

Country Status (1)

Country Link
GB (1) GB717600A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3027226A (en) * 1957-09-12 1962-03-27 Abitibi Power & Paper Co Recovery of base from waste liquor
US3095265A (en) * 1958-11-03 1963-06-25 Pritchard & Co J F Ion exchange process for recovery of monovalent ions from waste sulfite pulping liquor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3027226A (en) * 1957-09-12 1962-03-27 Abitibi Power & Paper Co Recovery of base from waste liquor
US3095265A (en) * 1958-11-03 1963-06-25 Pritchard & Co J F Ion exchange process for recovery of monovalent ions from waste sulfite pulping liquor

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