GB507791A - Improvements in and relating to the recovery of pulp from printed paper - Google Patents
Improvements in and relating to the recovery of pulp from printed paperInfo
- Publication number
- GB507791A GB507791A GB878338A GB878338A GB507791A GB 507791 A GB507791 A GB 507791A GB 878338 A GB878338 A GB 878338A GB 878338 A GB878338 A GB 878338A GB 507791 A GB507791 A GB 507791A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pulp
- printed paper
- relating
- recovery
- 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.)
- 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
507,791. Paper pulp. McGREGOR, E. T. March 22, 1938, No. 8783. [Class 2 (ii)] For producing a de-inked paper stock from printed paper, the latter after soaking in water, is agitated with a solution of trisodium phosphate at or below atmospheric temperature. After agitation, it is convenient to add such a quantity of water as will cause the oil, carbon &c. to float to the surface, whereupon these impurities are drained off. After separation the pulp is washed, pressed, &c., and the solution is filtered, strengthened and returned for re-use. Reference has been directed by the Comptroller to U.S.A. Specification 1,933,228.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB878338A GB507791A (en) | 1938-03-22 | 1938-03-22 | Improvements in and relating to the recovery of pulp from printed paper |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB878338A GB507791A (en) | 1938-03-22 | 1938-03-22 | Improvements in and relating to the recovery of pulp from printed paper |
Publications (1)
Publication Number | Publication Date |
---|---|
GB507791A true GB507791A (en) | 1939-06-21 |
Family
ID=9859175
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB878338A Expired GB507791A (en) | 1938-03-22 | 1938-03-22 | Improvements in and relating to the recovery of pulp from printed paper |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB507791A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5360512A (en) * | 1989-03-15 | 1994-11-01 | Woodfree Limited | Method and product for treating waste paper material |
-
1938
- 1938-03-22 GB GB878338A patent/GB507791A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5360512A (en) * | 1989-03-15 | 1994-11-01 | Woodfree Limited | Method and product for treating waste paper material |
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