FR2426768A1 - Procede perfectionne de pyrolyse de lessives usagees provenant de la fabrication de pates a papier - Google Patents

Procede perfectionne de pyrolyse de lessives usagees provenant de la fabrication de pates a papier

Info

Publication number
FR2426768A1
FR2426768A1 FR7815104A FR7815104A FR2426768A1 FR 2426768 A1 FR2426768 A1 FR 2426768A1 FR 7815104 A FR7815104 A FR 7815104A FR 7815104 A FR7815104 A FR 7815104A FR 2426768 A1 FR2426768 A1 FR 2426768A1
Authority
FR
France
Prior art keywords
soln
slurry
pressure
sulphite
contg
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.)
Withdrawn
Application number
FR7815104A
Other languages
English (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.)
ST Regis Paper Co
Original Assignee
ST Regis Paper Co
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 ST Regis Paper Co filed Critical ST Regis Paper Co
Priority to FR7815104A priority Critical patent/FR2426768A1/fr
Publication of FR2426768A1 publication Critical patent/FR2426768A1/fr
Withdrawn legal-status Critical Current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
    • D21C11/12—Combustion of pulp liquors
    • D21C11/125—Decomposition of the pulp liquors in reducing atmosphere or in the absence of oxidants, i.e. gasification or pyrolysis

Landscapes

  • Paper (AREA)

Abstract

L'invention décrit un perfectionnement à la pyrolyse des lessives usagées de fabrication de la pâte à papier. On soumet cette lessive usagée (contenant Na et S) à un traitement préalable utilisant des produits résultant de la réaction d'hydropyrolyse. Ce prétraitement permet de séparer les parties minérales (en vue de les utiliser pour fabriquer de la nouvelle lessive) et d'ajuster les caractéristiques physiques et chimiques du produit de carbonisation résultant de l'hydropyrolyse. Application notamment à la régénération des lessives pour fabriquer de la pâte kraft.
FR7815104A 1978-05-22 1978-05-22 Procede perfectionne de pyrolyse de lessives usagees provenant de la fabrication de pates a papier Withdrawn FR2426768A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7815104A FR2426768A1 (fr) 1978-05-22 1978-05-22 Procede perfectionne de pyrolyse de lessives usagees provenant de la fabrication de pates a papier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7815104A FR2426768A1 (fr) 1978-05-22 1978-05-22 Procede perfectionne de pyrolyse de lessives usagees provenant de la fabrication de pates a papier

Publications (1)

Publication Number Publication Date
FR2426768A1 true FR2426768A1 (fr) 1979-12-21

Family

ID=9208524

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7815104A Withdrawn FR2426768A1 (fr) 1978-05-22 1978-05-22 Procede perfectionne de pyrolyse de lessives usagees provenant de la fabrication de pates a papier

Country Status (1)

Country Link
FR (1) FR2426768A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2181823A1 (fr) * 1972-04-25 1973-12-07 Texaco Development Corp
FR2233439A1 (fr) * 1973-05-17 1975-01-10 Texaco Development Corp

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2181823A1 (fr) * 1972-04-25 1973-12-07 Texaco Development Corp
FR2233439A1 (fr) * 1973-05-17 1975-01-10 Texaco Development Corp

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXBK/73 *

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Legal Events

Date Code Title Description
ST Notification of lapse