CA2273146A1 - Dissolved solids control in pulp production - Google Patents
Dissolved solids control in pulp production Download PDFInfo
- Publication number
- CA2273146A1 CA2273146A1 CA002273146A CA2273146A CA2273146A1 CA 2273146 A1 CA2273146 A1 CA 2273146A1 CA 002273146 A CA002273146 A CA 002273146A CA 2273146 A CA2273146 A CA 2273146A CA 2273146 A1 CA2273146 A1 CA 2273146A1
- Authority
- CA
- Canada
- Prior art keywords
- dom
- pulp
- liquor
- low
- bleachability
- 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
- 239000007787 solid Substances 0.000 title 1
- 102100030386 Granzyme A Human genes 0.000 abstract 2
- 101001009599 Homo sapiens Granzyme A Proteins 0.000 abstract 2
- 239000003513 alkali Substances 0.000 abstract 2
- 238000010790 dilution Methods 0.000 abstract 2
- 239000012895 dilution Substances 0.000 abstract 2
- 239000002655 kraft paper Substances 0.000 abstract 2
- 239000007788 liquid Substances 0.000 abstract 2
- 238000007792 addition Methods 0.000 abstract 1
- 238000000605 extraction Methods 0.000 abstract 1
- 239000011368 organic material Substances 0.000 abstract 1
Landscapes
- Paper (AREA)
Abstract
Kraft pulp of increased strength and bleachability may be produced with deceased consumption of effective alkali, and at a lower H factor, by keeping the dissolved organic material (DOM) concentration low substantially through the entire kraft cook, including by extracting high DOM liquid from at least one part of a continuous digester and replacing it with much lower level DOM liquid. Existing pulp mills having two-vessel hydraulic, one-vessel hydraulic, or other systems may be retrofit to provide for extractions and additions of low DOM dilution liquor (including substantially DOM-free white liquor). Also, commercial size batch digesters (8 tons per day of pulp or more) can be operated with low DOM liquor to produce increased strength pulp. Using dilution with low DOM liquor also results in reduced H factor and effective alkali consumption, and increased bleachability.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US056,211 | 1993-05-04 | ||
| US08/056,211 US5489363A (en) | 1993-05-04 | 1993-05-04 | Pulping with low dissolved solids for improved pulp strength |
| US08/127,548 US5547012A (en) | 1993-05-04 | 1993-09-28 | Dissolved solids control in pulp production |
| US127,548 | 1993-09-28 | ||
| CA002159998A CA2159998C (en) | 1993-05-04 | 1994-02-25 | Dissolved solids control in pulp production |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002159998A Division CA2159998C (en) | 1993-05-04 | 1994-02-25 | Dissolved solids control in pulp production |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002424682A Division CA2424682A1 (en) | 1993-05-04 | 1994-02-25 | Dissolved solids control in pulp production |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2273146A1 true CA2273146A1 (en) | 1994-11-10 |
| CA2273146C CA2273146C (en) | 2003-12-30 |
Family
ID=29715688
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002273146A Expired - Lifetime CA2273146C (en) | 1993-05-04 | 1994-02-25 | Dissolved solids control in pulp production |
| CA002222664A Expired - Lifetime CA2222664C (en) | 1993-05-04 | 1994-02-25 | Dissolved solids control in pulp production |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002222664A Expired - Lifetime CA2222664C (en) | 1993-05-04 | 1994-02-25 | Dissolved solids control in pulp production |
Country Status (1)
| Country | Link |
|---|---|
| CA (2) | CA2273146C (en) |
-
1994
- 1994-02-25 CA CA002273146A patent/CA2273146C/en not_active Expired - Lifetime
- 1994-02-25 CA CA002222664A patent/CA2222664C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CA2222664C (en) | 2004-12-14 |
| CA2273146C (en) | 2003-12-30 |
| CA2222664A1 (en) | 1994-11-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |
Effective date: 20140225 |