JPS6452892A - Method for bleaching wood pulp - Google Patents
Method for bleaching wood pulpInfo
- Publication number
- JPS6452892A JPS6452892A JP20930487A JP20930487A JPS6452892A JP S6452892 A JPS6452892 A JP S6452892A JP 20930487 A JP20930487 A JP 20930487A JP 20930487 A JP20930487 A JP 20930487A JP S6452892 A JPS6452892 A JP S6452892A
- Authority
- JP
- Japan
- Prior art keywords
- coox
- pulp
- methyl
- bleaching wood
- peroxides
- 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
Links
Landscapes
- Paper (AREA)
Abstract
PURPOSE: To provide a method for bleaching wood pulps by using peroxides and a little auxiliary agent while making no scale trouble and preventing any trouble of e.g. the corrosions of the device involved or red tides by using a little amount of specific polycarboxylic acid-based (co)polymer. CONSTITUTION: This method for bleaching wood pulps (pref. a high yield pulp, deinked pulp or kraft pulp) by peroxides is conducted by using, based on an absolute dry pulp, 0.05 to 1 wt.% of polycarboxylic acid-based (co)polymer having a repeating unit of the formula (A<1> and A<2> are each H, a methyl or -COOX<2> , noted that A<1> and A<2> are not simultaneous -COOX<2> ; A3 is H, a methyl or -CH2 COOX<3> , noted that A<1> and A2 are each H or a methyl when A3 is -CH2 COOX<3> ; and X<1> to X<3> are each H, an 1 to 2-valent metal, ammonium or organic amine) as a main unit and having a molecular weight of 800 to 80,000.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20930487A JPH0240791B2 (en) | 1987-08-25 | 1987-08-25 | MOKUZAI PARUPUNOHYOHAKUHOHO |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20930487A JPH0240791B2 (en) | 1987-08-25 | 1987-08-25 | MOKUZAI PARUPUNOHYOHAKUHOHO |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6452892A true JPS6452892A (en) | 1989-02-28 |
JPH0240791B2 JPH0240791B2 (en) | 1990-09-13 |
Family
ID=16570737
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20930487A Expired - Lifetime JPH0240791B2 (en) | 1987-08-25 | 1987-08-25 | MOKUZAI PARUPUNOHYOHAKUHOHO |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0240791B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01148890A (en) * | 1987-12-01 | 1989-06-12 | Nippon Shokubai Kagaku Kogyo Co Ltd | Method for bleaching wood pulp |
JPH01148891A (en) * | 1987-12-04 | 1989-06-12 | Nippon Shokubai Kagaku Kogyo Co Ltd | Method for bleaching wood pulp |
JP2008163496A (en) * | 2006-12-27 | 2008-07-17 | San Nopco Ltd | Bleaching aid for cellulose pulp and method for producing bleached cellulose pulp |
-
1987
- 1987-08-25 JP JP20930487A patent/JPH0240791B2/en not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01148890A (en) * | 1987-12-01 | 1989-06-12 | Nippon Shokubai Kagaku Kogyo Co Ltd | Method for bleaching wood pulp |
JPH01148891A (en) * | 1987-12-04 | 1989-06-12 | Nippon Shokubai Kagaku Kogyo Co Ltd | Method for bleaching wood pulp |
JP2008163496A (en) * | 2006-12-27 | 2008-07-17 | San Nopco Ltd | Bleaching aid for cellulose pulp and method for producing bleached cellulose pulp |
Also Published As
Publication number | Publication date |
---|---|
JPH0240791B2 (en) | 1990-09-13 |
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