FR2282500A1 - Paper pulp is de-lignified by heating with alkali - followed by oxidation with oxidising liquid and pressurised oxygen - Google Patents

Paper pulp is de-lignified by heating with alkali - followed by oxidation with oxidising liquid and pressurised oxygen

Info

Publication number
FR2282500A1
FR2282500A1 FR7428615A FR7428615A FR2282500A1 FR 2282500 A1 FR2282500 A1 FR 2282500A1 FR 7428615 A FR7428615 A FR 7428615A FR 7428615 A FR7428615 A FR 7428615A FR 2282500 A1 FR2282500 A1 FR 2282500A1
Authority
FR
France
Prior art keywords
lignified
paper pulp
alkali
oxidation
followed
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.)
Granted
Application number
FR7428615A
Other languages
French (fr)
Other versions
FR2282500B1 (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.)
GRP EUROP DE CELLULOSE
Original Assignee
GRP EUROP DE CELLULOSE
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 GRP EUROP DE CELLULOSE filed Critical GRP EUROP DE CELLULOSE
Priority to FR7428615A priority Critical patent/FR2282500A1/en
Priority to BE2054527A priority patent/BE832560A/en
Publication of FR2282500A1 publication Critical patent/FR2282500A1/en
Application granted granted Critical
Publication of FR2282500B1 publication Critical patent/FR2282500B1/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
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/22—Other features of pulping processes
    • D21C3/26—Multistage processes
    • D21C3/263—Multistage processes at least one stage being in presence of oxygen
    • 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
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/22—Other features of pulping processes
    • D21C3/222—Use of compounds accelerating the pulping processes

Landscapes

  • Paper (AREA)

Abstract

A paper pulp is de-lignified during a first stage in which it is pre-heated up with a reactive alkaline fluid and a second stage during which the solid matter is treated with an oxidising liquid in the presence of high pressure oxygen gas, the gases produced by the reaction are removed and re-circulated into the system. A good quality pulp producing a strong paper can be achieved with a lower production of toxic gases, thereby requiring simpler and less expensive equipment.
FR7428615A 1974-08-20 1974-08-20 Paper pulp is de-lignified by heating with alkali - followed by oxidation with oxidising liquid and pressurised oxygen Granted FR2282500A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR7428615A FR2282500A1 (en) 1974-08-20 1974-08-20 Paper pulp is de-lignified by heating with alkali - followed by oxidation with oxidising liquid and pressurised oxygen
BE2054527A BE832560A (en) 1974-08-20 1975-08-20 PAPER PULP MANUFACTURING PROCESS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7428615A FR2282500A1 (en) 1974-08-20 1974-08-20 Paper pulp is de-lignified by heating with alkali - followed by oxidation with oxidising liquid and pressurised oxygen

Publications (2)

Publication Number Publication Date
FR2282500A1 true FR2282500A1 (en) 1976-03-19
FR2282500B1 FR2282500B1 (en) 1976-12-31

Family

ID=9142483

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7428615A Granted FR2282500A1 (en) 1974-08-20 1974-08-20 Paper pulp is de-lignified by heating with alkali - followed by oxidation with oxidising liquid and pressurised oxygen

Country Status (2)

Country Link
BE (1) BE832560A (en)
FR (1) FR2282500A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA895756A (en) * 1970-04-03 1972-03-21 Macmillan Bloedel Limited Two-stage soda-oxygen pulping
FR2105990A5 (en) * 1970-08-25 1972-04-28 Mo Och Domsjoe Ab
FR2190974A1 (en) * 1972-07-05 1974-02-01 Mo Och Domsjoe Ab

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA895756A (en) * 1970-04-03 1972-03-21 Macmillan Bloedel Limited Two-stage soda-oxygen pulping
FR2105990A5 (en) * 1970-08-25 1972-04-28 Mo Och Domsjoe Ab
FR2190974A1 (en) * 1972-07-05 1974-02-01 Mo Och Domsjoe Ab

Also Published As

Publication number Publication date
BE832560A (en) 1975-12-16
FR2282500B1 (en) 1976-12-31

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Legal Events

Date Code Title Description
ST Notification of lapse