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JPS6440692A - Bleaching of old paper pulp by waste gas desulfurizing product - Google Patents

Bleaching of old paper pulp by waste gas desulfurizing product

Info

Publication number
JPS6440692A
JPS6440692A JP19205687A JP19205687A JPS6440692A JP S6440692 A JPS6440692 A JP S6440692A JP 19205687 A JP19205687 A JP 19205687A JP 19205687 A JP19205687 A JP 19205687A JP S6440692 A JPS6440692 A JP S6440692A
Authority
JP
Japan
Prior art keywords
bleaching
pulp
waste gas
paper pulp
old paper
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
JP19205687A
Other languages
Japanese (ja)
Other versions
JPH0585676B2 (en
Inventor
Eiichi Saito
Yoshihiro Kanamaru
Toshifumi Takakuwa
Shigeki Aoki
Osamu Matsumura
Ken Takanishi
Yoshitaka Sato
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.)
New Oji Paper Co Ltd
Original Assignee
Oji Paper Co 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.)
Filing date
Publication date
Application filed by Oji Paper Co Ltd filed Critical Oji Paper Co Ltd
Priority to JP19205687A priority Critical patent/JPS6440692A/en
Publication of JPS6440692A publication Critical patent/JPS6440692A/en
Publication of JPH0585676B2 publication Critical patent/JPH0585676B2/ja
Granted legal-status Critical Current

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  • Paper (AREA)

Abstract

PURPOSE: To effectively and inexpensively bleach wastepaper pulp by bleaching the pulp with the mixture of sodium sulfite and sodium bisulfite product of stack-gas desulfurization after bleaching the wastepaper pulp with peroxide. CONSTITUTION: This process comprises bleaching wastepaper pulp by the peroxide and bleaching with the sodium sulfite and sodium bisulfite product of the stack-gas desulfurization [preferably, the mixture having molar ratio of (Na2 SO3 +NaHSO3 )/Na2 SO3 =1.5 to 2.0] by adding the mixture in amount of 1.0 to 2.0 wt.% as the SO2 to the pulp slurry including 10 to 13% of pulp, at pH 6.5 to 7.0, temperature 40 to 50 deg.C for 5 to 12 hr.
JP19205687A 1987-07-31 1987-07-31 Bleaching of old paper pulp by waste gas desulfurizing product Granted JPS6440692A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19205687A JPS6440692A (en) 1987-07-31 1987-07-31 Bleaching of old paper pulp by waste gas desulfurizing product

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19205687A JPS6440692A (en) 1987-07-31 1987-07-31 Bleaching of old paper pulp by waste gas desulfurizing product

Publications (2)

Publication Number Publication Date
JPS6440692A true JPS6440692A (en) 1989-02-10
JPH0585676B2 JPH0585676B2 (en) 1993-12-08

Family

ID=16284881

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19205687A Granted JPS6440692A (en) 1987-07-31 1987-07-31 Bleaching of old paper pulp by waste gas desulfurizing product

Country Status (1)

Country Link
JP (1) JPS6440692A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03294589A (en) * 1990-04-09 1991-12-25 Sanyo Kokusaku Pulp Co Ltd Treatment of unclassified waste information-recording paper

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03294589A (en) * 1990-04-09 1991-12-25 Sanyo Kokusaku Pulp Co Ltd Treatment of unclassified waste information-recording paper

Also Published As

Publication number Publication date
JPH0585676B2 (en) 1993-12-08

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees