FR2251662B1 - - Google Patents

Info

Publication number
FR2251662B1
FR2251662B1 FR7341203A FR7341203A FR2251662B1 FR 2251662 B1 FR2251662 B1 FR 2251662B1 FR 7341203 A FR7341203 A FR 7341203A FR 7341203 A FR7341203 A FR 7341203A FR 2251662 B1 FR2251662 B1 FR 2251662B1
Authority
FR
France
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
FR7341203A
Other languages
French (fr)
Other versions
FR2251662A1 (en
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.)
Spring Chemicals Ltd
Original Assignee
Spring Chemicals 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
Priority to CA142,181A priority Critical patent/CA974008A/en
Priority to DE19732355642 priority patent/DE2355642A1/de
Priority claimed from DE19732355642 external-priority patent/DE2355642A1/de
Application filed by Spring Chemicals Ltd filed Critical Spring Chemicals Ltd
Priority to FR7341203A priority patent/FR2251662A1/fr
Publication of FR2251662A1 publication Critical patent/FR2251662A1/fr
Application granted granted Critical
Publication of FR2251662B1 publication Critical patent/FR2251662B1/fr
Granted 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
    • D21C11/02—Regeneration of pulp liquors or effluent waste waters of acid, neutral or alkaline sulfite lye
    • 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
    • C01F11/00—Compounds of calcium, strontium, or barium
    • C01F11/48—Sulfites
    • 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
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/26—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof
    • C02F2103/28—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof from the paper or cellulose industry

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Geology (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
FR7341203A 1972-05-15 1973-11-20 Removal of calcium from spent sulphite liquor - by adding further calcium material to convert calcium to calcium sulphite Granted FR2251662A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CA142,181A CA974008A (en) 1972-05-15 1972-05-15 Process for treating magnesium-base waste sulfite liquor
DE19732355642 DE2355642A1 (de) 1973-11-07 1973-11-07 Verfahren zur behandlung magnesiumbasischer sulfitablaugen
FR7341203A FR2251662A1 (en) 1972-05-15 1973-11-20 Removal of calcium from spent sulphite liquor - by adding further calcium material to convert calcium to calcium sulphite

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CA142,181A CA974008A (en) 1972-05-15 1972-05-15 Process for treating magnesium-base waste sulfite liquor
DE19732355642 DE2355642A1 (de) 1973-11-07 1973-11-07 Verfahren zur behandlung magnesiumbasischer sulfitablaugen
FR7341203A FR2251662A1 (en) 1972-05-15 1973-11-20 Removal of calcium from spent sulphite liquor - by adding further calcium material to convert calcium to calcium sulphite

Publications (2)

Publication Number Publication Date
FR2251662A1 FR2251662A1 (en) 1975-06-13
FR2251662B1 true FR2251662B1 (forum.php) 1978-11-10

Family

ID=32965882

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7341203A Granted FR2251662A1 (en) 1972-05-15 1973-11-20 Removal of calcium from spent sulphite liquor - by adding further calcium material to convert calcium to calcium sulphite

Country Status (2)

Country Link
CA (1) CA974008A (forum.php)
FR (1) FR2251662A1 (forum.php)

Also Published As

Publication number Publication date
CA974008A (en) 1975-09-09
FR2251662A1 (en) 1975-06-13

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Legal Events

Date Code Title Description
ST Notification of lapse