EP0181028A3 - Apparatus and process for producing raw of bleached chemimechanical wood pulps by a continuous impregnation process - Google Patents

Apparatus and process for producing raw of bleached chemimechanical wood pulps by a continuous impregnation process Download PDF

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Publication number
EP0181028A3
EP0181028A3 EP85201730A EP85201730A EP0181028A3 EP 0181028 A3 EP0181028 A3 EP 0181028A3 EP 85201730 A EP85201730 A EP 85201730A EP 85201730 A EP85201730 A EP 85201730A EP 0181028 A3 EP0181028 A3 EP 0181028A3
Authority
EP
European Patent Office
Prior art keywords
tank
wood pulps
producing raw
chemimechanical
continuous impregnation
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
Application number
EP85201730A
Other versions
EP0181028A2 (en
EP0181028B1 (en
Inventor
Giorgio Gazza
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SICEM SAGA SpA
Original Assignee
SICEM SAGA SpA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SICEM SAGA SpA filed Critical SICEM SAGA SpA
Priority to AT85201730T priority Critical patent/ATE41793T1/en
Publication of EP0181028A2 publication Critical patent/EP0181028A2/en
Publication of EP0181028A3 publication Critical patent/EP0181028A3/en
Application granted granted Critical
Publication of EP0181028B1 publication Critical patent/EP0181028B1/en
Expired legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/02—Pretreatment of the raw materials by chemical or physical means
    • D21B1/021—Pretreatment of the raw materials by chemical or physical means by chemical means

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

An apparatus and process for producing chemimechanical wood pulp wherein the mixture is fed from a first tank, into which the product and reagents are continuously fed, to a series of successive tanks of which at least one can be kept substantially empty in turn, the level of the product suspension present in each tank being able to be externally set so that the flow from one tank to another and thus the total product reaction time become controlled in accordance with said level, it also being possible to keep those products simultaneously present in the plant but with different characteristics separate from each other by virtue of said tank which is kept substantially empty in turn.
EP85201730A 1984-11-09 1985-10-23 Apparatus and process for producing raw of bleached chemimechanical wood pulps by a continuous impregnation process Expired EP0181028B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85201730T ATE41793T1 (en) 1984-11-09 1985-10-23 APPARATUS AND PROCESS FOR THE PRODUCTION OF RAW OR BLEACHED CHEMI-MECHANICAL WOOD PULP BY A CONTINUOUS IMPREGNATION PROCESS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT46876/84A IT1181139B (en) 1984-11-09 1984-11-09 EQUIPMENT AND PROCEDURE FOR THE PRODUCTION OF RAW OR WHITENED SEMIMECHANICAL WOOD DOORS WITH CONTINUOUS IMPREGNATION CYCLE
IT4687684 1984-11-09

Publications (3)

Publication Number Publication Date
EP0181028A2 EP0181028A2 (en) 1986-05-14
EP0181028A3 true EP0181028A3 (en) 1987-01-28
EP0181028B1 EP0181028B1 (en) 1989-03-29

Family

ID=11260077

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85201730A Expired EP0181028B1 (en) 1984-11-09 1985-10-23 Apparatus and process for producing raw of bleached chemimechanical wood pulps by a continuous impregnation process

Country Status (4)

Country Link
EP (1) EP0181028B1 (en)
AT (1) ATE41793T1 (en)
DE (1) DE3569133D1 (en)
IT (1) IT1181139B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2785917B1 (en) * 1998-11-16 2001-01-12 Wood & Pulp Ltd PROCESS AND PLANT FOR PRODUCING PAPER PULP

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2035447A (en) * 1934-07-27 1936-03-31 Charles D Altick System of pulp preparation
GB1091124A (en) * 1964-02-11 1967-11-15 Du Pin Cellulose Process of bleaching paper pulp
FR1562448A (en) * 1967-04-15 1969-04-04

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2035447A (en) * 1934-07-27 1936-03-31 Charles D Altick System of pulp preparation
GB1091124A (en) * 1964-02-11 1967-11-15 Du Pin Cellulose Process of bleaching paper pulp
FR1562448A (en) * 1967-04-15 1969-04-04

Also Published As

Publication number Publication date
DE3569133D1 (en) 1989-05-03
EP0181028A2 (en) 1986-05-14
IT1181139B (en) 1987-09-23
IT8446876A0 (en) 1984-11-09
ATE41793T1 (en) 1989-04-15
EP0181028B1 (en) 1989-03-29
IT8446876A1 (en) 1986-05-09

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