WO2003097936A1 - Retention system in production of paper - Google Patents

Retention system in production of paper Download PDF

Info

Publication number
WO2003097936A1
WO2003097936A1 PCT/HR2002/000032 HR0200032W WO03097936A1 WO 2003097936 A1 WO2003097936 A1 WO 2003097936A1 HR 0200032 W HR0200032 W HR 0200032W WO 03097936 A1 WO03097936 A1 WO 03097936A1
Authority
WO
WIPO (PCT)
Prior art keywords
paper
retention
production
fibres
fillers
Prior art date
Application number
PCT/HR2002/000032
Other languages
French (fr)
Inventor
Damir Bracun
Golemovic Mijat
Original Assignee
Eco Chemicals Anstalt
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 Eco Chemicals Anstalt filed Critical Eco Chemicals Anstalt
Priority to AU2002310559A priority Critical patent/AU2002310559A1/en
Publication of WO2003097936A1 publication Critical patent/WO2003097936A1/en

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/06—Paper forming aids
    • D21H21/10—Retention agents or drainage improvers
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/76—Processes or apparatus for adding material to the pulp or to the paper characterised by choice of auxiliary compounds which are added separately from at least one other compound, e.g. to improve the incorporation of the latter or to obtain an enhanced combined effect
    • D21H23/765—Addition of all compounds to the pulp
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/37—Polymers of unsaturated acids or derivatives thereof, e.g. polyacrylates
    • D21H17/375—Poly(meth)acrylamide
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/63—Inorganic compounds
    • D21H17/66—Salts, e.g. alums

Definitions

  • the invention relates to the field of paper production.
  • the invention improves the retention of fibres and fillers in paper production.
  • the first system is a mono system, by which system only one retention aid is added (polymer of anionic, cationic or nonionic type).
  • the second, improved system includes adding of two aids for the retention of fibres and fillers, one of which is polymer, and the other inorganic coagulant such as bentonite, with corresponding charge.
  • This new system differs from the already existing systems by the fact that this new system determines the order of specific chemicals that are not applied in already existing patents. In the existing patents preparation of chemicals is relatively complex, demaning more expensive equipment, premises and additional manpower.
  • the scheme represents a part of machine for paper production, so called constant part with machine sieve for paper production where the paper sheet is formed.
  • Coagulant as a retention aid, is added in the pipe (position 1), through which pipe circulates paper pulp of low concentration (0.5-1,0%), before mixing pump and devise for additional sorting (postition 2) where higher level of turbulence is achieved resulting in better performance of coagulant.
  • Polyelectrolite as the second retention aid in dual system, is added after sorting (position 3) in front of the thread of the paper machine (position 4), also in the zone of high turbulence, so better retention of fibres and fillers could be achieved.
  • coagulant is dosed to the paper pulp of low concentration before filtration device (sorting machine), while the polymer is dosed after the filtration device (sorting machine).
  • the paper is produced by adding of inorganic coagulant, as the first retention aid, to the paper pulp of low concentration with strong mixing. After that polymer of different charge is added (polyelectrolite), also in the zone of high turbulence. From such a prepared paper pulp paper sheet is formed on paper machine sieve and further processed by procedures of drainage and drying until the final product is produced.
  • inorganic coagulant as the first retention aid
  • Inorganic coagulant as a retention aid, is added to the pipe (position 1) through which pipe circulates paper pulp pf low concentration (0,5-1,0%) before mixing pump and device for additional sorting (position 2) where higher level of turbulence is achieved resulting in better performance of coagulant.

Abstract

Invention Ecoret-system for retention in the production of paper relates to the field of paper production, that is the area where retention of fibres and fillers is conducted. Improvement of retention level is subject of permanent attention of paper producers, since this is an area where significant technical and ecological improvements may be achieved, as well as reduction of production costs. By applying of this invention the level of retention is increased (retention of fibres and fillers), as also dosing of retention means I simplified and contamination of waste water is decreased, all the aforesaid resulting in decreasing of costs of paper production. The essence of this invention represents the fact that the paper is produced by firstly adding of liquid cationic coagulant, such as polyaluminim chloride, with subsequent adding of polymer of corresponding charge (anionic, cationic, nonionic).

Description

RETENTION SYSTEM IN PRODUCTION OF PAPER
1. HELD OF TECHNIQUE THE INVENTION RELATES TO
The invention relates to the field of paper production.
2. TECHNICAL PROBLEM THE PROTECTION IS REQUESTED FOR
The invention improves the retention of fibres and fillers in paper production.
3. STATUS OF TECHNIQUE
Nowdays, there are two systems existing in the field of technique this invention relates to.
The first system is a mono system, by which system only one retention aid is added (polymer of anionic, cationic or nonionic type).
The second, improved system includes adding of two aids for the retention of fibres and fillers, one of which is polymer, and the other inorganic coagulant such as bentonite, with corresponding charge.
Outgoing patent protection in this field of technique relates only to the patent under publication number US5514249, date of publication May 7th 1996, IPC classification D21H21/10, EOB classification D21H17/37B, D21H17/68, D21H23/14, inventor Cauley Thomas A., Langley John G. and nion Adrian. 4. PRESENTATION OF ESSENCE OF THE INVENTION
The advantage of this invention is comparison to the already existing solutions relates to the folowing:
-better keeping, retention respectively, of fibres and fillers in paper production, -decreasing of level of waste water contamination, resulting in decrease of costs of waste water processing, as well as lower fees paid for waste water discharges, -direct implementation (dosing) of chemicals, without prior preparation.
This new system differs from the already existing systems by the fact that this new system determines the order of specific chemicals that are not applied in already existing patents. In the existing patents preparation of chemicals is relatively complex, demaning more expensive equipment, premises and additional manpower.
In this new system there is no need for any special equipment, since the delivered chemicals are already prepared for implementation (dosing).
5. BRIEF DESCRIPTION OF IMAGES DRAWING
The scheme represents a part of machine for paper production, so called constant part with machine sieve for paper production where the paper sheet is formed.
Coagulant, as a retention aid, is added in the pipe (position 1), through which pipe circulates paper pulp of low concentration (0.5-1,0%), before mixing pump and devise for additional sorting (postition 2) where higher level of turbulence is achieved resulting in better performance of coagulant. Polyelectrolite, as the second retention aid in dual system, is added after sorting (position 3) in front of the thread of the paper machine (position 4), also in the zone of high turbulence, so better retention of fibres and fillers could be achieved.
So prepared paper pulp, running through the thread comes to the paper machine sieve (position 5) where the paper sheet is formed from suspension of paper fibres, which is in further stage processed through different systems of drainage and drying until the final product is produced.
6. DETAILED DESCRIPTION OF THE INVENTION REALISATION
By this invention coagulant is dosed to the paper pulp of low concentration before filtration device (sorting machine), while the polymer is dosed after the filtration device (sorting machine).
The paper is produced by adding of inorganic coagulant, as the first retention aid, to the paper pulp of low concentration with strong mixing. After that polymer of different charge is added (polyelectrolite), also in the zone of high turbulence. From such a prepared paper pulp paper sheet is formed on paper machine sieve and further processed by procedures of drainage and drying until the final product is produced.
Inorganic coagulant, as a retention aid, is added to the pipe (position 1) through which pipe circulates paper pulp pf low concentration (0,5-1,0%) before mixing pump and device for additional sorting (position 2) where higher level of turbulence is achieved resulting in better performance of coagulant.
SUBSTITUTE SHEΞT(RULE 26) Polymer, as the second retention aid in dual system, is added after sorting machine (position 3) in front of the thread of the paper machine (position 4), also in the zone of high turbulence, so better retention of fibres and fillers could be achieved.
So prepared paper pulp, running through the thread comes to the paper machine sieve (position 5) where the paper sheet is formed from suspension of paper fibres, which is in further stage processed through different systems of drainage and drying until the final product is produced.
SUBSTITUTE SHEET(RULE 25)

Claims

The patent name is ECORET-system for retention in production of paper.
The present technological status represents dual system consisting of polymer dosing (usually powder anionic, cationic or nonionic charge) and inorganic component such as bentonite, also in a form of powder, while this invention
is characterised
by the fact that it consists of firstly adding of liquid cationic coagulant, such as polyaluminium chloride and subsequent adding of polymer such as polyacrylamide of corresponding charge (anionic, cationic, nonionic).
PCT/HR2002/000032 2002-05-17 2002-06-03 Retention system in production of paper WO2003097936A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002310559A AU2002310559A1 (en) 2002-05-17 2002-06-03 Retention system in production of paper

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
HRP20020430A 2002-05-17
HR20020430A HRP20020430A2 (en) 2002-05-17 2002-05-17 Ecoret-system for retention in production of paper

Publications (1)

Publication Number Publication Date
WO2003097936A1 true WO2003097936A1 (en) 2003-11-27

Family

ID=29433921

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/HR2002/000032 WO2003097936A1 (en) 2002-05-17 2002-06-03 Retention system in production of paper

Country Status (3)

Country Link
AU (1) AU2002310559A1 (en)
HR (1) HRP20020430A2 (en)
WO (1) WO2003097936A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4964954A (en) * 1987-03-03 1990-10-23 Eka Nobel Ab Process for the production of paper
WO2001034909A1 (en) * 1999-11-08 2001-05-17 Ciba Specialty Chemicals Water Treatments Limited Manufacture of paper and paperboard
US6391156B1 (en) * 1999-11-08 2002-05-21 Ab Cdm Vastra Frolunda Manufacture of paper and paperboard

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4964954A (en) * 1987-03-03 1990-10-23 Eka Nobel Ab Process for the production of paper
WO2001034909A1 (en) * 1999-11-08 2001-05-17 Ciba Specialty Chemicals Water Treatments Limited Manufacture of paper and paperboard
US6391156B1 (en) * 1999-11-08 2002-05-21 Ab Cdm Vastra Frolunda Manufacture of paper and paperboard

Also Published As

Publication number Publication date
AU2002310559A1 (en) 2003-12-02
HRP20020430A2 (en) 2004-06-30

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