GB257774A - Improvements in process for reclaiming used paper - Google Patents
Improvements in process for reclaiming used paperInfo
- Publication number
- GB257774A GB257774A GB2786625A GB2786625A GB257774A GB 257774 A GB257774 A GB 257774A GB 2786625 A GB2786625 A GB 2786625A GB 2786625 A GB2786625 A GB 2786625A GB 257774 A GB257774 A GB 257774A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pulp
- sulphite
- paper
- excess
- caustic soda
- 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.)
- Expired
Links
Classifications
-
- 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
- D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
- D21C5/02—Working-up waste paper
- D21C5/025—De-inking
- D21C5/027—Chemicals therefor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/64—Paper recycling
Landscapes
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Toxicology (AREA)
- Paper (AREA)
Abstract
257,774. Hammond, G. Nov. 5, 1925. Pulp, preparation of.-Newspaper or other paper having a pigment applied thereto is reclaimed by reducing the paper to pulp and removing the pigment therefrom and then mixing the pulp with an alkali acid sulphite at a temperature below 110‹ F. Prior to treating with the sulphite the pulp may be treated with a caustic soda solution, also at a temperature of 110‹ F., the amount of caustic soda used being approximately 2.5 per cent by weight of the paper treated. The alkali acid sulphite is preferably added in excess of that required to neutralize the alkalinity of the pump, the resulting pulp being washed to remove the excess sulphite.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US1514625 US1572478A (en) | 1925-03-12 | 1925-03-12 | Process for reclaiming used paper |
FR606098D FR606098A (en) | 1925-11-05 | 1925-10-27 | Process for refurbishing papers that have already been used for printing |
GB2786625A GB257774A (en) | 1925-11-05 | 1925-11-05 | Improvements in process for reclaiming used paper |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2786625A GB257774A (en) | 1925-11-05 | 1925-11-05 | Improvements in process for reclaiming used paper |
Publications (1)
Publication Number | Publication Date |
---|---|
GB257774A true GB257774A (en) | 1926-09-09 |
Family
ID=10266577
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2786625A Expired GB257774A (en) | 1925-03-12 | 1925-11-05 | Improvements in process for reclaiming used paper |
Country Status (3)
Country | Link |
---|---|
US (1) | US1572478A (en) |
FR (1) | FR606098A (en) |
GB (1) | GB257774A (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2673798A (en) * | 1949-07-20 | 1954-03-30 | Zundel Jean Ernest | Deinking |
US5458737A (en) * | 1993-07-27 | 1995-10-17 | Hoechst Celanese Corporation | Quaternary compounds as brightness enhancers |
US5560805A (en) * | 1993-07-27 | 1996-10-01 | Hoechst Celanese Corporation | Enhanced decolorization of waste paper with selected amines |
US5580422A (en) * | 1993-07-27 | 1996-12-03 | Hoechst Celanese Corporation | Brightening color dyed wastepaper with a bleaching agent and a quaternary compound |
US5882476A (en) * | 1995-05-05 | 1999-03-16 | Solvay Minerals, Inc. | Deinking printed wastepaper using alkaline solution containing sodium sulfite and sodium carbonate |
-
1925
- 1925-03-12 US US1514625 patent/US1572478A/en not_active Expired - Lifetime
- 1925-10-27 FR FR606098D patent/FR606098A/en not_active Expired
- 1925-11-05 GB GB2786625A patent/GB257774A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR606098A (en) | 1926-06-07 |
US1572478A (en) | 1926-02-09 |
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