GB1346039A - Process for working up sulphite waste liquors - Google Patents

Process for working up sulphite waste liquors

Info

Publication number
GB1346039A
GB1346039A GB3536572A GB1346039DA GB1346039A GB 1346039 A GB1346039 A GB 1346039A GB 3536572 A GB3536572 A GB 3536572A GB 1346039D A GB1346039D A GB 1346039DA GB 1346039 A GB1346039 A GB 1346039A
Authority
GB
United Kingdom
Prior art keywords
carbon
added
production
filtrate
filtered
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
GB3536572A
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.)
Institut fuer Papier Zellstoff und Fasertechnik
Original Assignee
Institut fuer Papier Zellstoff und Fasertechnik
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 Institut fuer Papier Zellstoff und Fasertechnik filed Critical Institut fuer Papier Zellstoff und Fasertechnik
Publication of GB1346039A publication Critical patent/GB1346039A/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
    • D21C11/0057—Oxidation of liquors, e.g. in order to reduce the losses of sulfur compounds, followed by evaporation or combustion if the liquor in question is a black liquor
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B32/00—Carbon; Compounds thereof
    • C01B32/30—Active carbon
    • C01B32/312—Preparation
    • C01B32/318—Preparation characterised by the starting materials
    • C01B32/324—Preparation characterised by the starting materials from waste materials, e.g. tyres or spent sulfite pulp liquor
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F5/00—Compounds of magnesium
    • C01F5/14—Magnesium hydroxide
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/06—Treatment of sludge; Devices therefor by oxidation
    • C02F11/08—Wet air oxidation
    • 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
    • D21C11/02—Regeneration of pulp liquors or effluent waste waters of acid, neutral or alkaline sulfite lye

Abstract

1346039 Magnesium bisulphite and carbon; purifying waste liquids INSTITUT FUR ZELLSTOFF UND PAPIER 28 July 1972 35365/72 Headings C1A and C1C Waste liquors from the production of cellulose that contain magnesium are treated at an elevated temperature and under a pressure sufficient to keep the liquor substantially liquefied with an oxygen containing gas until the organic material present has formed an insoluble, carbon-like residue which is filtered off, heat liberated by the oxidation maintaining the temperature, then Ca(OH) 2 is added to the filtrate to precipitate (MgOH)2 which is filtered off, suspended in water and sulphited with SO 2 to produce a fresh digestion liquor for celloluse production. The Ca(OH) 2 may be added in two stages. Before the second stage a Mgcontaining salt may be added to make up any losses incurred in the cellulose production. The carbon-like residue obtained may be activated with steam or by pasting with ZnCl 2 and heating, and may be used to purify the filtrate.
GB3536572A 1971-09-02 1972-07-28 Process for working up sulphite waste liquors Expired GB1346039A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DD15748171 1971-09-02
GB3536572 1972-07-28

Publications (1)

Publication Number Publication Date
GB1346039A true GB1346039A (en) 1974-02-06

Family

ID=25747420

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3536572A Expired GB1346039A (en) 1971-09-02 1972-07-28 Process for working up sulphite waste liquors

Country Status (2)

Country Link
DE (1) DE2239362A1 (en)
GB (1) GB1346039A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3518005A1 (en) * 1985-05-18 1986-11-20 Kraftanlagen Ag, 6900 Heidelberg SULFITE DIGESTIVE METHOD FOR PRODUCING CELLULAR FROM LIGNOCELLULOSE-CONTAINING MATERIALS WITH RECOVERY OF THE DIGESTIVE CHEMICALS
DE102013217418A1 (en) * 2013-05-08 2014-11-13 Siemens Aktiengesellschaft Hydrothermal treatment of sewage sludge and black liquor

Also Published As

Publication number Publication date
DE2239362A1 (en) 1973-03-08

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees