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Process for bleaching pulp without using chlorine containing chemicals 원문보기

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • D21C-009/147
  • D21C-009/153
  • D21C-009/16
출원번호 US-0059404 (1993-05-11)
우선권정보 SE-0001477 (1992-05-11)
발명자 / 주소
  • Backlund Ake (Karlstad SEX) Andtbacka Stig (Karlstad SEX) Dillner Bjorn (Saffle SEX)
출원인 / 주소
  • Kvaerner Pulping Technologies AB (Karlstad SEX 03)
인용정보 피인용 횟수 : 34  인용 특허 : 0

초록

A process is disclosed for bleaching pulp without chlorine containing chemicals and for greatly reducing total washing filtrate discharge, comprising the steps of: 1) sending pulp that has been subjected to continuous digestion, oxygen-delignification and then washing, through a washing press; 2) tr

대표청구항

A process for bleaching pulp in a bleaching plant without using chlorine containing chemicals comprising: (1) sending pulp, that has been subjected to continuous digestion and then oxygen-delignification and then washing in a washing apparatus, through a washing press; (2) treating, with agitation,

이 특허를 인용한 특허 (34)

  1. Pangalos George, Avoidance of salt scaling by acidic pulp washing process.
  2. Lyons, David; Sukkar, Theresa, Composite cement article incorporating a powder coating and methods of making same.
  3. Naji, Basil; Merkley, Donald J.; Zammit, Michael; Luo, Caidian, Durable medium-density fibre cement composite.
  4. Kilgannon,Robin R.; Kane,Robert J.; Joy,Eileen M.; Dewan,Anil K., Elimination of alum yellowing of aspen thermomechanical pulp through pulp washing.
  5. Harada Akinori (Kanagawa-ken JPX), Fabrication of ferroelectric domain reversals.
  6. Gleeson, James A.; Paradis, Kalynne H.; Sloane, Brian P.; Melmeth, David L.; Seligman, Dean M., Fiber cement building materials with low density additives.
  7. Gleeson, James A.; Paradis, Kalynne H.; Sloane, Brian P.; Melmeth, David L.; Seligman, Dean M., Fiber cement building materials with low density additives.
  8. Gleeson, James A.; Paradis, Kalynne H.; Sloane, Brian P.; Melmeth, David L.; Seligman, Dean M., Fiber cement building materials with low density additives.
  9. Gleeson, James A.; Paradis, Kalynne H.; Sloane, Brian P.; Melmeth, David L.; Seligman, Dean M., Fiber cement building materials with low density additives.
  10. Luo, Caidian; Merkley, Donald J., Fiber cement composite materials using bleached cellulose fibers.
  11. Merkley, Donald J.; Luo, Caidian, Fiber cement composite materials using cellulose fibers loaded with inorganic and/or organic substances.
  12. Merkley, Donald J.; Luo, Caidian, Fiber cement composite materials using cellulose fibers loaded with inorganic and/or organic substances.
  13. Merkley, Donald J.; Luo, Caidian, Fiber cement composite materials using sized cellulose fibers.
  14. Merkley, Donald J.; Luo, Caidian, Fiber cement composite materials using sized cellulose fibers.
  15. Luo, Caidian; Merkley, Donald J., Fiber reinforced cement composite materials using chemically treated fibers with improved dispersibility.
  16. Luo,Caidian; Merkley,Donald J., Fiber reinforced cement composite materials using chemically treated fibers with improved dispersibility.
  17. Merkley, Donald J.; Luo, Caidian, Method and apparatus for reducing impurities in cellulose fibers for manufacture of fiber reinforced cement composite materials.
  18. Merkley, Donald J.; Luo, Caidian, Method and apparatus for reducing impurities in cellulose fibers for manufacture of fiber reinforced cement composite materials.
  19. van Lee, Richard Constantine; Devanesan, Alagaratnam Joseph, Method and system for efficient production of dissolving pulp in a kraft mill producing paper grade pulp with a continuous type digester.
  20. van Lee, Richard Constantine; Devanesan, Alagaratnam Joseph, Method and system for efficient production of dissolving pulp in a kraft mill producing paper grade pulp with a continuous type digester.
  21. Henricson, Kaj; Pikka, Olavi; Tervola, Pekka, Method for treating pulp in connection with the bleaching of chemical pulp.
  22. Bergqvist Anders,SEX ; Larsson Lars Ove,SEX ; Nilsson Erik,SEX ; Tibbling Petter,SEX, Method of bleaching pulp without using chlorine chemicals in a (QP)Z bleaching sequence.
  23. Jay Chiehlung Hsu ; Nauman Noorali Lakhani, Method of making sanitary paper product from coarse fibers.
  24. Germg.ang.rd Ulf,SEX, Method of separating metal ions from pulp using a chelating agent.
  25. Sundaram V. S. Meenakshi ; Fisher Steven A. ; Corbeil Sebastien, Method to improve final bleached pulp strength properties by adjusting the CI02:03 ration within a single (D/Z) stage of the bleaching process.
  26. Hsu Jay Chiehlung ; Lakhani Nauman Noorali, Process for modifying pulp from recycled newspapers.
  27. Li, Jian, Process of purifying wood pulp with caustic-borate solution and recovering the purifying chemical.
  28. Hsu Jay Chiehlung ; Lakhani Nauman Noorali, Production of soft paper products from coarse cellulosic fibers.
  29. Back Sangho ; Lazorisak Nicholas W. ; Smeltzer Norman L. ; Schmitt John F., Production of soft paper products from old newspaper.
  30. Hsu Jay Chiehlung ; Lakhani Nauman Noorali ; Smith Reginald, Production of soft paper products from old newspaper.
  31. Ekholm Rolf,SEX ; Jansson Ulf,SEX, Separation device.
  32. Ekholm Rolf,SEX ; Jansson Ulf,SEX, Separation device and process.
  33. Cottier, John Sydney; Cowen, December Rose; Dunoyer, Remi; Duselis, Steven; Gleeson, James Albert; Kumar, Amitabha, Structural fiber cement building materials.
  34. Duselis, Steven Alfred; Gleeson, James; Kascelan, Tihomir; Lyons, David; O'Chee, Milton Terrence, Surface sealed reinforced building element.
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