GB1102456A – Improvements in the bleaching of paper
– Google Patents
GB1102456A – Improvements in the bleaching of paper
– Google Patents
Improvements in the bleaching of paper
Info
Publication number
GB1102456A
GB1102456A
GB33090/64A
GB3309064A
GB1102456A
GB 1102456 A
GB1102456 A
GB 1102456A
GB 33090/64 A
GB33090/64 A
GB 33090/64A
GB 3309064 A
GB3309064 A
GB 3309064A
GB 1102456 A
GB1102456 A
GB 1102456A
Authority
GB
United Kingdom
Prior art keywords
solution
hydrosulphite
paper
weight
peracetic acid
Prior art date
1964-08-13
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
GB33090/64A
Inventor
Morris Wayman
William Howard Rapson
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.)
Electric Reduction Company of Canada Ltd
Original Assignee
Electric Reduction Company of Canada 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.)
1964-08-13
Filing date
1964-08-13
Publication date
1968-02-07
1964-08-13
Application filed by Electric Reduction Company of Canada Ltd
filed
Critical
Electric Reduction Company of Canada Ltd
1964-08-13
Priority to GB33090/64A
priority
Critical
patent/GB1102456A/en
1965-07-28
Priority to NO159121A
priority
patent/NO118204B/no
1965-08-02
Priority to US476452A
priority
patent/US3467575A/en
1965-08-04
Priority to FI651882A
priority
patent/FI51722C/en
1965-08-04
Priority to BE667858D
priority
patent/BE667858A/xx
1968-02-07
Publication of GB1102456A
publication
Critical
patent/GB1102456A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
D—TEXTILES; PAPER
D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
D21H25/00—After-treatment of paper not provided for in groups D21H17/00 – D21H23/00
D21H25/02—Chemical or biochemical treatment
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
D21C9/1057—Multistage, with compounds cited in more than one sub-group D21C9/10, D21C9/12, D21C9/16
D—TEXTILES; PAPER
D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
D21H17/63—Inorganic compounds
D21H17/66—Salts, e.g. alums
D—TEXTILES; PAPER
D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
D21H21/32—Bleaching agents
D—TEXTILES; PAPER
D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
D21H5/00—Special paper or cardboard not otherwise provided for
D21H5/12—Special paper or cardboard not otherwise provided for characterised by the use of special fibrous materials
D21H5/1272—Special paper or cardboard not otherwise provided for characterised by the use of special fibrous materials of fibres which can be physically or chemically modified during or after web formation
D21H5/1281—Special paper or cardboard not otherwise provided for characterised by the use of special fibrous materials of fibres which can be physically or chemically modified during or after web formation by chemical treatment
Abstract
Paper is bleached by treating it with an aqueous solution of peracetic acid or a salt thereof, e.g. the sodium salt, heating it, e.g. at about 100 DEG C for up to 60 seconds, treating it with an aqueous solution of a hydrosulphite e.g. sodium or zinc hydrosulphite, and drying it. The solutions may be applied by immersing the paper in the solutions, by spraying or by transfer rolls. The peracetic acid or its salt may be present in the solution in a concentration of 0.1 – 2% by weight, the solution optionally being buffered to a pH of 6-9 and being stabilised by the addition of about 1% by weight of a phosphate, e.g. tetrasodium pyrophosphate. After the heating step and prior to treatment with the hydrosulphite solution the peracetic acid on the paper may be neutralized with an SO2 sulphite, bisulphite or metabisulphite solution. The hydrosulphite solution which may have a pH of 4 – 7, may contain 0.1 – 2% by weight of the hydrosulphite and may be stabilised by the addition of 1-3% by weight of a phosphate, e.g. KH2 PO4. After treatment with the hydrosulphite solution the paper may be heated at a temperature of about 100 DEG C for up to 120 seconds. The bleaching may be effected before the final drying step in the paper making process.
GB33090/64A
1964-08-13
1964-08-13
Improvements in the bleaching of paper
Expired
GB1102456A
(en)
Priority Applications (5)
Application Number
Priority Date
Filing Date
Title
GB33090/64A
GB1102456A
(en)
1964-08-13
1964-08-13
Improvements in the bleaching of paper
NO159121A
NO118204B
(en)
1964-08-13
1965-07-28
US476452A
US3467575A
(en)
1964-08-13
1965-08-02
Process of bleaching paper with peracetic acid
FI651882A
FI51722C
(en)
1964-08-13
1965-08-04
Method for bleaching paper.
BE667858D
BE667858A
(en)
1964-08-13
1965-08-04
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
GB33090/64A
GB1102456A
(en)
1964-08-13
1964-08-13
Improvements in the bleaching of paper
Publications (1)
Publication Number
Publication Date
GB1102456A
true
GB1102456A
(en)
1968-02-07
Family
ID=10348440
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB33090/64A
Expired
GB1102456A
(en)
1964-08-13
1964-08-13
Improvements in the bleaching of paper
Country Status (5)
Country
Link
US
(1)
US3467575A
(en)
BE
(1)
BE667858A
(en)
FI
(1)
FI51722C
(en)
GB
(1)
GB1102456A
(en)
NO
(1)
NO118204B
(en)
Families Citing this family (4)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3635806A
(en)
*
1969-10-27
1972-01-18
Procter & Gamble
Photochemical bleaching of polymaleate homopolymers and copolymers in the presence of a peracid
US3709778A
(en)
*
1971-01-12
1973-01-09
Atlantic Richfield Co
Method for bleaching groundwood pulp with tertiary butyl hydroperoxide
FI90680C
(en)
*
1992-04-24
1994-03-10
Kymin Paperiteollisuus Oy
Bleaching of paper web with peroxide
US7914646B2
(en)
*
2006-07-21
2011-03-29
Nalco Company
Compositions and processes for paper production
Family Cites Families (12)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
CA461242A
(en)
*
1949-11-22
L. Mcewen Robert
Bleached paper and method of bleaching the same
US1154851A
(en)
*
1915-04-19
1915-09-28
Edward P Foley
Process of bleaching ground wood-pulp.
US1645061A
(en)
*
1924-08-21
1927-10-11
American Lakes Paper Company
Method of bleaching paper pulp
US2125634A
(en)
*
1937-03-29
1938-08-02
Oxford Paper Co
Method of bleaching pulp or paper webs
US2150926A
(en)
*
1937-07-03
1939-03-21
Buffalo Electro Chem Co
Process of making and bleaching paper
US2347434A
(en)
*
1941-06-30
1944-04-25
Du Pont
Stabilization of peracid solutions
US2492047A
(en)
*
1946-03-30
1949-12-20
Du Pont
Bleaching wood pulp
US2598580A
(en)
*
1947-10-08
1952-05-27
Buffalo Electro Chem Co
Bleaching or brightening a web of mixed fibers
US2862784A
(en)
*
1955-03-04
1958-12-02
Virginia Smelting Company
Oxidative-reductive multi-stage bleaching of ground wood pulp
US2963395A
(en)
*
1958-03-31
1960-12-06
Crown Zellerbach Corp
Process of bleaching lignocellulosic pulps
US2970882A
(en)
*
1958-12-03
1961-02-07
Kendall & Co
Process for continuous purification of bulk fiber
US3085039A
(en)
*
1960-08-23
1963-04-09
Fmc Corp
Process for the treatment of wood
1964
1964-08-13
GB
GB33090/64A
patent/GB1102456A/en
not_active
Expired
1965
1965-07-28
NO
NO159121A
patent/NO118204B/no
unknown
1965-08-02
US
US476452A
patent/US3467575A/en
not_active
Expired – Lifetime
1965-08-04
FI
FI651882A
patent/FI51722C/en
active
1965-08-04
BE
BE667858D
patent/BE667858A/xx
not_active
IP Right Cessation
Also Published As
Publication number
Publication date
FI51722B
(en)
1976-11-30
FI51722C
(en)
1977-03-10
NO118204B
(en)
1969-11-24
US3467575A
(en)
1969-09-16
BE667858A
(en)
1965-12-01
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