CA1050212A - Method of increasing pulp yield and viscosity - Google Patents

Method of increasing pulp yield and viscosity

Info

Publication number
CA1050212A
CA1050212A CA209,440A CA209440A CA1050212A CA 1050212 A CA1050212 A CA 1050212A CA 209440 A CA209440 A CA 209440A CA 1050212 A CA1050212 A CA 1050212A
Authority
CA
Canada
Prior art keywords
cyanide
treatment
accordance
conducted
pulp
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
CA209,440A
Other languages
English (en)
French (fr)
Other versions
CA209440S (en
Inventor
Kenton J. Brown
Richard B. Phillips
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.)
International Paper Co
Original Assignee
International 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 International Paper Co filed Critical International Paper Co
Application granted granted Critical
Publication of CA1050212A publication Critical patent/CA1050212A/en
Expired legal-status Critical Current

Links

Classifications

    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21CPRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C1/00Pretreatment of the finely-divided materials before digesting
    • D21C1/06Pretreatment of the finely-divided materials before digesting with alkaline reacting compounds

Landscapes

  • Paper (AREA)
CA209,440A 1974-08-12 1974-09-17 Method of increasing pulp yield and viscosity Expired CA1050212A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US49673474A 1974-08-12 1974-08-12

Publications (1)

Publication Number Publication Date
CA1050212A true CA1050212A (en) 1979-03-13

Family

ID=23973900

Family Applications (1)

Application Number Title Priority Date Filing Date
CA209,440A Expired CA1050212A (en) 1974-08-12 1974-09-17 Method of increasing pulp yield and viscosity

Country Status (9)

Country Link
JP (1) JPS5126303A (enExample)
CA (1) CA1050212A (enExample)
DE (1) DE2505004A1 (enExample)
FI (1) FI750314A7 (enExample)
FR (1) FR2282017A1 (enExample)
GB (1) GB1501456A (enExample)
IT (1) IT1027406B (enExample)
NO (1) NO750369L (enExample)
SE (1) SE7501239L (enExample)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61167292U (enExample) * 1986-03-20 1986-10-17

Also Published As

Publication number Publication date
FR2282017A1 (fr) 1976-03-12
GB1501456A (en) 1978-02-15
JPS5126303A (enExample) 1976-03-04
FI750314A7 (enExample) 1976-02-13
SE7501239L (sv) 1976-02-13
IT1027406B (it) 1978-11-20
DE2505004A1 (de) 1976-02-26
NO750369L (enExample) 1976-02-13

Similar Documents

Publication Publication Date Title
US3944463A (en) Pulping of lignocellulosic material with oxygen in two stages at increasing pH
CA2651483C (en) Methods for carbonate pretreatment and pulping of cellulosic material
CA2221619A1 (en) Modified organosolv pulping
US5470433A (en) Process for the delignification of cellulose fiber raw materials using alcohol and alkali
US3691008A (en) Two-stage soda-oxygen pulping
US4091749A (en) Alkaline pulping of lignocellulosic material with amine pretreatment
EP0494519A1 (en) High yield pulping process
CA1050212A (en) Method of increasing pulp yield and viscosity
US3695994A (en) Impregnation of wood chips with a cellulose protector followed by a soda-oxygen pulping stage
US4045280A (en) Alkaline pulping of lignocellulosic material with amine and nitrate pretreatment
EP0517689A1 (en) Multi-level sulfide content
US4113553A (en) Sodium sulfide pulping with hydrogen sulfide generation
AU639304B2 (en) Process for preparing kraft pulp
US3567572A (en) Polysulfide liquor impregnation of lignocellulose materials in a multistage pulping process
US5326433A (en) Multi-level sulfide content white liquor production and utilization in cellulose pulping
US6569285B2 (en) Process for gas phase pretreating of lignocellulosic containing material
US3874991A (en) Polysulfide impregnation of lignocellulosic materials in a continuous digester
US3520773A (en) Alkaline pulping processes with chemical pretreatment
CA1096559A (en) Process for pretreating particulate lignocellulosic material
US4750973A (en) Process for reducing carbohydrate losses in the sulfate pulping of wood by pretreating the wood with oxygen and nitrogen oxides
US3795574A (en) Impregnation of wood with a formaldehyde free alkaline solution of sodium hydroxide at a ph between 12.4 and 13
CA2430389C (en) Improved kraft pulp yield by heat treatment of polysulphide liquors generated by oxidation
CA1240812A (en) Process for producing nitrogen oxides from aqueous waste cellulose pulp liquor containing nitrogen compounds
CA1094263A (en) Method of producing ultra high yield pulp
CA2399723A1 (en) Pulping process