MY111246A - Environmentally improved process for bleaching lignocellulosic materials. - Google Patents
Environmentally improved process for bleaching lignocellulosic materials.Info
- Publication number
- MY111246A MY111246A MYPI91001379A MYPI19911379A MY111246A MY 111246 A MY111246 A MY 111246A MY PI91001379 A MYPI91001379 A MY PI91001379A MY PI19911379 A MYPI19911379 A MY PI19911379A MY 111246 A MY111246 A MY 111246A
- Authority
- MY
- Malaysia
- Prior art keywords
- pulp
- delignifying
- improved process
- lignocellulosic materials
- bleaching
- Prior art date
Links
- 238000004061 bleaching Methods 0.000 title abstract 2
- 238000000034 method Methods 0.000 title abstract 2
- 239000012978 lignocellulosic material Substances 0.000 title 1
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 abstract 4
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 abstract 2
- 239000004155 Chlorine dioxide Substances 0.000 abstract 2
- 239000000460 chlorine Substances 0.000 abstract 2
- 229910052801 chlorine Inorganic materials 0.000 abstract 2
- 235000019398 chlorine dioxide Nutrition 0.000 abstract 2
- 239000007844 bleaching agent Substances 0.000 abstract 1
- 230000007613 environmental effect Effects 0.000 abstract 1
- 239000000706 filtrate Substances 0.000 abstract 1
- 239000012467 final product Substances 0.000 abstract 1
- 150000002978 peroxides Chemical class 0.000 abstract 1
Landscapes
- Paper (AREA)
Abstract
A PROCESS FOR DELIGNIFYING AND BLEACHING A LIGNOCELLULOSIC PULP WITHOUT THE USE OF ELEMENTAL CHLORINE BY PARTIALLY DELIGNIFYING THE PULP TO A K NO. OF ABOUT 10 OR LESS AND A VISCOSITY OF GREATER THAN ABOUT 13 CPS; AND FURTHER DELIGNIFYING THE PARTIALLY DELIGNIFIED PULP WITH AN EFFECTIVE AMOUNT OF OZONE FOR A SUFFICIENT TIME TO OBTAIN A SUBSTANTIALLY DELIGNIFIED PULP HAVING A K NO. OF ABOUT 5 OR LESS, A VISCOSITY OF GREATER THAN ABOUT 10, AND A GE BRIGHTNESS OF AT LEAST ABOUT 50% THE SUBSTANTIALLY DELIGNIFIED PULP MAY BE BRIGHTENED BY THE ADDITION OF A BLEACHING AGENT SUCH AS CHLORINE DIOXIDE OR A PEROXIDE TO OBTAIN A FINAL PRODUCT HAVING A GE BRIGHTNESS OF AT LEAST ABOUT 65%, PREFERABLY ABOVE 70% TO AS HIGH AS 90% BECAUSE OF THE ABSENCE OF ELEMENTAL CHLORINE IN THIS SEQUENCE, FILTRATE FROM ALL STAGES BUT THE CHLORINE DIOXIDE STAGE (IF USED) CAN BE RECOVERED WITHOUT SEWERING. MAJOR ENVIRONMENTAL IMPROVEMENTS ARE THUS ACHIEVED. (FIG. 2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| MYPI91001379A MY111246A (en) | 1991-07-31 | 1991-07-31 | Environmentally improved process for bleaching lignocellulosic materials. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| MYPI91001379A MY111246A (en) | 1991-07-31 | 1991-07-31 | Environmentally improved process for bleaching lignocellulosic materials. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| MY111246A true MY111246A (en) | 1999-10-30 |
Family
ID=79554043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| MYPI91001379A MY111246A (en) | 1991-07-31 | 1991-07-31 | Environmentally improved process for bleaching lignocellulosic materials. |
Country Status (1)
| Country | Link |
|---|---|
| MY (1) | MY111246A (en) |
-
1991
- 1991-07-31 MY MYPI91001379A patent/MY111246A/en unknown
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