ES340790A1 - Superbleaching of wood pulps - Google Patents

Superbleaching of wood pulps

Info

Publication number
ES340790A1
ES340790A1 ES340790A ES340790A ES340790A1 ES 340790 A1 ES340790 A1 ES 340790A1 ES 340790 A ES340790 A ES 340790A ES 340790 A ES340790 A ES 340790A ES 340790 A1 ES340790 A1 ES 340790A1
Authority
ES
Spain
Prior art keywords
weight
pulp
superbleaching
amount
wood pulps
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
ES340790A
Other languages
Spanish (es)
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.)
FMC Corp
Original Assignee
FMC Corp
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 FMC Corp filed Critical FMC Corp
Publication of ES340790A1 publication Critical patent/ES340790A1/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
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/10—Bleaching ; Apparatus therefor
    • D21C9/1026—Other features in bleaching processes
    • D21C9/1036—Use of compounds accelerating or improving the efficiency of the processes

Abstract

Process for ultra-whitening chemical wood or semi-chemical pulp, primarily bleached, characterized in that it comprises treating the pulp, in an aqueous system, with hydrogen peroxide in an amount of 0.01 to 0.5% by weight and N-benzoyl succinimide in the amount of 0.01 to 3% by weight, based on the dry weight of said paste, to a pulp consistency of 2 to 85 by weight and still ph of the order of 2.5 to 9.5, the treatment temperature being from 23.8ºC to 100ºC and the treatment duration from 15 minutes to 16 hours. (Machine-translation by Google Translate, not legally binding)
ES340790A 1966-05-31 1967-05-20 Superbleaching of wood pulps Expired ES340790A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US55366766A 1966-05-31 1966-05-31

Publications (1)

Publication Number Publication Date
ES340790A1 true ES340790A1 (en) 1968-07-01

Family

ID=24210273

Family Applications (1)

Application Number Title Priority Date Filing Date
ES340790A Expired ES340790A1 (en) 1966-05-31 1967-05-20 Superbleaching of wood pulps

Country Status (2)

Country Link
US (1) US3462344A (en)
ES (1) ES340790A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4427490A (en) 1978-04-07 1984-01-24 International Paper Company Delignification and bleaching process for lignocellulosic pulp with peroxide in the presence of metal additives
US4410397A (en) * 1978-04-07 1983-10-18 International Paper Company Delignification and bleaching process and solution for lignocellulosic pulp with peroxide in the presence of metal additives
USH479H (en) 1986-12-19 1988-06-07 Shell Oil Company Wood pulp bleaching process
US5188708A (en) * 1989-02-15 1993-02-23 Union Camp Patent Holding, Inc. Process for high consistency oxygen delignification followed by ozone relignification
US5211811A (en) * 1989-02-15 1993-05-18 Union Camp Patent Holding, Inc. Process for high consistency oxygen delignification of alkaline treated pulp followed by ozone delignification
US5409570A (en) * 1989-02-15 1995-04-25 Union Camp Patent Holding, Inc. Process for ozone bleaching of oxygen delignified pulp while conveying the pulp through a reaction zone
US5164043A (en) * 1990-05-17 1992-11-17 Union Camp Patent Holding, Inc. Environmentally improved process for bleaching lignocellulosic materials with ozone
US5164044A (en) * 1990-05-17 1992-11-17 Union Camp Patent Holding, Inc. Environmentally improved process for bleaching lignocellulosic materials with ozone
US5554259A (en) * 1993-10-01 1996-09-10 Union Camp Patent Holdings, Inc. Reduction of salt scale precipitation by control of process stream Ph and salt concentration
US11591751B2 (en) 2019-09-17 2023-02-28 Gpcp Ip Holdings Llc High efficiency fiber bleaching process

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL97796C (en) * 1958-05-29
US3061550A (en) * 1959-05-11 1962-10-30 Du Pont Textile bleaching composition
NO109292C (en) * 1962-07-16

Also Published As

Publication number Publication date
US3462344A (en) 1969-08-19

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