CN1122151A - Improvements in or relating to deinking of paper - Google Patents
Improvements in or relating to deinking of paper Download PDFInfo
- Publication number
- CN1122151A CN1122151A CN94191843A CN94191843A CN1122151A CN 1122151 A CN1122151 A CN 1122151A CN 94191843 A CN94191843 A CN 94191843A CN 94191843 A CN94191843 A CN 94191843A CN 1122151 A CN1122151 A CN 1122151A
- Authority
- CN
- China
- Prior art keywords
- magnetic
- paper
- magnet
- ink
- printing ink
- 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.)
- Pending
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/002—High gradient magnetic separation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/005—Pretreatment specially adapted for magnetic separation
- B03C1/01—Pretreatment specially adapted for magnetic separation by addition of magnetic adjuvants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/04—Magnetic separation acting directly on the substance being separated with the material carriers in the form of trays or with tables
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/26—Magnetic separation acting directly on the substance being separated with free falling material
-
- 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
- Paper (AREA)
Abstract
The invention discloses various methods for separation of laser and xerographic printed paper waste containing ink having a magnetic component from other paper waste products containing ink which does not contain any magnetic material, by the use of at least one magnet. The invention also provides a method for removal of magnetic ink from pulp stock formed from such xerographic and laser printed paper waste comprising feeding such pulped paper waste past at least one magnet for removal of all or substantially all of such magnetic ink. The magnetic ink can be removed by capture or deflection techniques. The preferred magnetic force to be applied in order to achieve the required results, utilises background magnetic fields in excess of 4000 Gauss and a field gradient in excess of 1000 Gauss/cm. The invention also provides a method for improving the recyclability of paper waste having ink thereon which does not normally contain a magnetic component, by utilising one or more magnetic carriers in the formulations of the printing ink utilised. Also disclosed is a method of enabling adhesive material to be removed from paper pulp containing same comprising incorporating a magnetic filler or carrier in said adhesive and removing such adhesive by magnetic means.
Description
The present invention relates to improving one's methods of deinking of paper.Especially, the present invention relates to reclaim into the paper of recycling purpose, whole ink markss or all basically ink markss that these paper had all are removed.More particularly, the present invention relates to use the xerography of regeneration or the recycling of the high-quality blank sheet of paper that laser stamping paper is produced.
At present, people pay close attention to the repeated use of paper more and more to attempt to be reduced in the use amount that paper is made Central Plains paper pulp.For the paper that guarantees to regenerate has desired high-quality, need remove all or whole basically traces from the paper and the paper products that will reuse usually.Particularly under the situation relevant with the paper of laser printing or xerography.In paper industry, the normally high-quality blank sheet of paper of these paper also is reserved as the copy of manufacturing regeneration or the potential very valuable raw material of laser stamping paper usually.Yet up to the present, it is not successful especially that the routine that is adopted is removed method for ink.In this respect, chemical extraction agent technology is as floating method (flotation) with disperse the application of auxiliary law (dispersion aids) at first to be used.
Round reusing these laser printing or electro-photographic paper economically two subject matters are arranged.The first, when paper and paper products were collected for recycling, generally collected was the mixture of all types waste paper.Therefore, be high-quality regeneration electro-photographic paper and laser stamping paper for what guarantee to obtain, just must assurance wherein have only laser printing and electro-photographic paper or paper products.Secondly, must be as much as possible from the laser printing that breaks into slurry and electro-photographic paper, remove removal ink fully, to eliminate the obfuscation phenomenon that produces by the printing ink granule and to generate by the spot that the printing ink bulky grain produces.
In view of above-mentioned chemical technology has been proved to be not this fact of economic sucess so, and consider, first, waste paper can not suitably be separated this fact, together with another fact, promptly can not remove removal ink fully basically after handling laser stamping paper and copy paper, and in order to obtain needed high quality fibers, also need to use former paper pulp, this promptly means will cut down more trees, and its result brings relevant with it ecological problem.
The object of the present invention is to provide a kind of from other waste paper high-quality laser printing of sort out and xerography waste paper, thereby therefrom remove the method that removal ink provides immaculate high brightness paper then.
Further aim of the present invention also is method of the present invention is applied to wherein, print employed printing ink and passed through suitable processing among the processing of other types printing paper goods.
The present invention is based on following discovery: used printing ink comprises thermosetting resin (being generally PVC) in laser printing and electro-photographic paper, wherein contains as the carbon black of pigment and participates in the iron oxide that dried China ink is placed printing equipment usually.Based on this discovery, we feel by Magnetic Isolation laser stamping paper and electro-photographic paper to be separated from the paper of other kinds is possible, and and then finds can after making beating the printing ink in these laser stamping papers and the electro-photographic paper fiber be separated by the use of magnet again.
According to an aspect of the present invention, provide a kind of, contained from other and do separation printing ink waste paper goods of (but wherein not containing any magnetic material) and/or choose the laser printing of the printing ink that contains the carrying magnetic component and the method for xerography waste paper by using at least one magnet and applying a suitable magnetic force.
Of the present invention this on the one hand, from the paper that contains the printing ink of not being with any magnetic material, separate with the paper of the printing ink that will contain the carrying magnetic component although magnet need have enough strong magnetic, any suitable magnet all can use.The magnet that is fit to can be electromagnet, permanent magnet or superconducting magnet.
In according to this method for optimizing on the one hand, the waste paper mixture to be gone up vertical drop substantially pass through at least one operating magnet, the waste paper of printing ink that contains the carrying magnetic component is by magnetic attachment to a side and be collected.In this, can adopt any suitable method.This operating magnet should apply magnetic force in the big zone of the processed scraps of paper.
Magnetic force is the function of two variablees:
1) magnetic flux density; And
2) field gradient.
Magnetic flux density is the product of the magnetic conductivity of magnetic field intensity and material.Magnetic field intensity is at the numerical value of medium midfield dominant vector (that is the magnetic tension that is produced by contiguous magnet unit or energized conductor).
Believe that this aspect of the present invention to the waste paper merchant or in that those wish that the people who selects the specific type paper for a special operational in the factory is favourable in the factory, for example is suitable for the production of laser printing or xerographi recycled paper.Remaining paper promptly can be used to make rudimentary recycled writing paper.
We have carried out the test relevant with laser printing and copy paper, and have understood fully that these paper can remove by magnetic field.
According to above-mentioned aspect of the present invention, we can sort out the paper that xerography and laser printing are arranged on it.Therefore, making has the page of xerography or laser printing to place high-intensity magnetic field on it, this page will be shifted to magnet then, under the situation that conventional waste paper and xerography waste paper mixture exist, this method can be used as a kind of means of from the waste paper of office preliminary election xerography or laser stamping paper.
Suitable magnetic force is by the background magnetic field that use to surpass 4000 Gausses (4 tesla) and surpasses 1000 Gausses/cm (field gradient of 10 teslas/m) realizes.
But, realize that the present invention might not be so high and absolute magnetic field.It is contemplated that a high gradient magnetic separation equipment, this equipment does not need so high output field intensity.Magnetic field gradient is important for separating effect.So also there is the kind of design of some high gradient machines.These designs are called " induction pole (induced pole) " equipment.
Relevant therewith suitable device, for example:
Frantz Ferrofilter (Frantz iron filter)
Carpco Separator (Carpco seperator)
Jones Separator (Jones seperator)
Kolm-Marston Separator (Kolm-Marston seperator)
Can be making of making beating technology as suitable repacking.
Because printing ink is hydrophobic, adopt a kind of extractant, carried out being used in printing ink on xerography and the laser stamping paper relevant further experiment that in water, suspends with making.We can use a magnet to reclaim these printing ink.
According to a further aspect in the invention, provide a kind of from by the method for removing magnetic ink xerography and the formed paper pulp raw material of laser printing waste paper, immaculate high brightness paper is provided, this method comprises such at least one magnet of the old paper stock warp let-off, to remove all or whole basically such magnetic ink.
Suppose that all traces all are xerographi (can be the routine printing to paper, as letter head, sign etc.), thus this method can allow for utilize again on the paper or the ash content that in fiber, exists increase output.In addition, do not separate fully from the paper fiber if handle the normal printing ink that is dispersed on the paper of spreading in back at pulper, then those fibers that still adhere to printing ink also need remove these printing ink with magnet.Because when recovery paper when being used for the production high quality paper, people require that any silk fiber is all non-cohesive printing ink.
The arrangement of at least one magnet should design like this, that is, make it produce a magnetic force, and it comprises preferred at least 4000 Gausses' background magnetic field and the preferred field gradient of at least 1000 Gausses/cm.
Preferably, use a plurality of magnets, and paper pulp raw material is sent into along the channel-style shell of tank that extends.Provide magnetic force by this way to paper pulp, that is, make little magnetic-particle be captured or deflection.
We find that incredible is by each possible magnetic-particle is applied magnetic force, can obtain fine grain Magnetic Isolation.The magnetic force that applied needs sufficiently big and strong, to overcome when the fluid drag of paper pulp when the shell that extends is sent into.
We also find, apply very strong magnet by the outside to the large beaker wall that paper pulp is housed, and magnetic-particle can be drawn to the inboard of this walls of beaker.
Thus, in order to reclaim magnetic material from paper pulp, it is possible utilizing a kind of type system that captures, and captures in the type system at this, magnet is dropped in the paper pulp or with magnet place the contiguous of paper pulp top to locate.Perhaps, it also is possible utilizing a kind of deflection system, and in this deflection system, magnet places near the outer wall of passage shape shell and applies enough big magnetic force and with the inwall of magnetic-particle suction to passage shape shell.
The steel ball that utilizes a plurality of selected sizes and shape also is possible, joins in the paper pulp after these balls are magnetized.Magnetic-particle and suchlike will be attached on the steel ball, from paper pulp, reclaim these steel balls then and with its demagnetization, so these metallic particles separate from it.After this, these steel balls can be magnetized and said method be carried out once more once more.
By using the method for enumerating above, can realize the separation of magnetic material from paper pulp.And adhesive, filler and Chinese white contained in the paper pulp do not have separated going out, so can be used again in the production recycled paper.
When using according to Magnetic Isolation of the present invention system, it is essential overcoming gravity and fluid drag (paper pulp closeness).
Owing in the process of recycling paper, can avoid using comparatively precious materials, as (in vain) china clay, so the effect that in the above-mentioned separation process of adopting, can obtain to save.
In another aspect of the present invention, a kind of method that waste paper utilizes again of promoting is provided, and the printing ink on these waste paper under normal circumstances is not contain magnetic components, promptly, by one or more magnetic carriers of use in employed printing-ink prescription, and make that this printing ink can be by being removed according to the above-mentioned method of enumerating.
In this aspect of the invention, when carbon ink was basic pigment, it was possible mixing metallic iron or its oxide or some other paramagnetic materials and make printing ink have magnetic in this printing ink.Such method may be simplified and the separating of other types printing ink, and as flexographic ink, its carrier matrix is alkali-soluble polymer (polyacrylate).
One side more of the present invention provides a kind of method that makes that adhesive material is removed from the paper pulp that contains this material, and this method is by mixing magnetic fillers or carrier and remove this adhesive by magnetic devices in described adhesive.Thus, contain after the paper of the employed adhesive in bookbinding district is being pulled an oar, adhesive wherein can be separated from its aqueous phase.
This shows, the present invention attempts to use the magnet of suitable intensity to make a kind of paper that was printed of specific type separate from the paper of other types, and in pulping process, remove the printing ink that is contained on these paper, these two processes have all been used magnet, as electromagnet, permanent magnet or superconducting magnet.Also imagine within the scope of the invention with one or more magnetic carrier or the filler printing ink that mixes other types and adhesive or paper industry in go in the material that uses, thereby make when taking place to recycle, re-use magnetic devices, the material of these printing ink and other types can be removed from paper pulp.
Compare with known method, the use of magnet is economical, and owing to there is not the use of chemical substance, it also is harmless to ecological environment.By using the resulting believable advantage of this magnetic technique, required exactly former paper pulp reduces greatly.
As mentioned above, any suitable magnet that enough field intensity and magnetic field force intensity are provided all can use.The power of believing 10-20KW is enough to make magnetic-particle etc. by desired separating.
Claims (13)
1, a kind of by using at least one magnet and by applying suitable magnetic force from containing printing ink but do not contain this printing ink to do in other waste paper goods of any magnetic material and separate and/or selection contains the laser stamping paper of printing ink of carrying magnetic component and the method for electro-photographic paper.
2, method as claimed in claim 1 has wherein been used at least one electromagnet and/or at least one permanent magnet and/or at least one superconducting magnet.
3, as the method for claim 1 or 2, wherein, the waste paper mixture gone up substantially vertically fall through at least one operating magnet, this waste paper mixture comprises the laser stamping paper and the xerography waste paper of the printing ink that contains the carrying magnetic component and does not contain other waste paper of this magnetic component, this waste paper of printing ink that contains the carrying magnetic component is by magnetic attachment to a side and be collected, this waste paper that does not contain this magnetic component falls through this magnet, and is not attracted.
4, as claim 1,2 or 3 method, wherein, required magnetic force is by using the background magnetic field that surpasses 4000 Gausses and reaching the field gradient that surpasses 1000 Gausses/cm.
5, a kind ofly comprise at least one magnet of this pulped paper waste, to remove all or whole basically this magnetic oil generation China inks from by the method for removing magnetic ink xerography and the formed paper pulp raw material of laser printing waste paper.
6, method as claimed in claim 5 wherein, has been used a plurality of magnets, and this paper pulp raw material infeeds along the channel-style shell of tank that extends, and provides magnetic force by this way to paper pulp, that is, make little magnetic-particle be captured or deflection.
7, method as claimed in claim 6, wherein, the mode that reclaims magnetic material be from paper pulp raw material with the type of capturing realizes, wherein, this magnet or each magnet be added dropwise in the paper pulp or the contiguous place that is placed in the paper pulp top.
8, method as claimed in claim 6 wherein reclaims magnetic material in the deflector type mode from paper pulp, wherein this magnet or each magnet are placed near the outer wall of passage shape shell.
9, as each method of claim 5 to 8, at least one electromagnet and/or at least one permanent magnet and/or at least one superconducting magnet have wherein been used.
10, as each method of claim 5 to 9, wherein, the arrangement of at least one magnet should design like this, that is, make it produce a magnetic force, and this magnetic force comprises the field gradient of at least 4000 Gausses' background magnetic field and at least 1000 Gausses/cm.
11, a kind of waste paper method of usability again that printing ink is arranged on it of promoting, this printing ink does not under normal circumstances contain magnetic component, by in the prescription of employed printing-ink, using magnetic carrier, thereby make this printing ink to remove by using according at least one magnet of the method for aforementioned any one claim.
12,, when magnetic is black when being basic pigment, use other paramagnetic material of metallic iron or its oxide or some so that printing ink has magnetic as the method for claim 11.
13, a kind of method that adhesive material is removed from the paper pulp that contains this material is included in and mixes magnetic fillers or carrier in the described adhesive, then, removes this adhesive by magnetic devices.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9308250A GB9308250D0 (en) | 1993-04-21 | 1993-04-21 | Improvements in or relating to deinking of paper |
| GB9308250.1 | 1993-04-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1122151A true CN1122151A (en) | 1996-05-08 |
Family
ID=10734223
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94191843A Pending CN1122151A (en) | 1993-04-21 | 1994-04-21 | Improvements in or relating to deinking of paper |
Country Status (10)
| Country | Link |
|---|---|
| EP (1) | EP0697043A1 (en) |
| JP (1) | JPH08509030A (en) |
| CN (1) | CN1122151A (en) |
| AU (1) | AU6542094A (en) |
| BR (1) | BR9406482A (en) |
| CA (1) | CA2161094A1 (en) |
| FI (1) | FI954981A0 (en) |
| GB (2) | GB9308250D0 (en) |
| RU (1) | RU2126860C1 (en) |
| WO (1) | WO1994024364A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1081259C (en) * | 1996-03-22 | 2002-03-20 | 曾其祥 | Method for removing spots on mica papermaking paper surface and its equipment |
| CN104827372A (en) * | 2015-04-28 | 2015-08-12 | 西南交通大学 | Mechanical printing paper ink removal method and mechanical printing paper ink removal device |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2123328A1 (en) * | 1993-12-13 | 1995-06-14 | Kimberly-Clark Worldwide, Inc. | Magnetic deinking |
| US5527426A (en) * | 1994-01-21 | 1996-06-18 | Westvaco Corporation | Magnetic deinking of waste papers |
| KR100301941B1 (en) * | 1996-03-08 | 2001-10-29 | 루케 존 이에 | Self-Destruction of Abolition |
| CN1077185C (en) * | 1996-03-08 | 2002-01-02 | 维思特瓦苛有限公司 | Magnetic deinking of waste paper |
| JP6458530B2 (en) * | 2015-02-16 | 2019-01-30 | セイコーエプソン株式会社 | Sheet manufacturing apparatus, sheet manufacturing method, waste paper processing apparatus |
| GB202217404D0 (en) * | 2022-11-21 | 2023-01-04 | Univ Swansea | Conductive ink |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1009804A (en) * | 1973-10-25 | 1977-05-10 | National Research Council Of Canada | Ink removal from waste paper |
| US4273847A (en) * | 1976-07-30 | 1981-06-16 | Epp Corp. | Inks for pulsed electrical printing and methods of producing same |
| US4176054A (en) * | 1977-05-16 | 1979-11-27 | Kelley Joseph A | Waste paper recycling |
| US4187463A (en) * | 1978-04-20 | 1980-02-05 | Gilbert Kivenson | Counterfeit detector for paper currency |
| JPS57205466A (en) * | 1981-06-12 | 1982-12-16 | Matsushita Electric Ind Co Ltd | Magnetic ink for recording |
| JPS63288770A (en) * | 1987-05-20 | 1988-11-25 | Mitsubishi Pencil Co Ltd | Ink and printer equipped with ink occluding materials using said ink |
| JPS6456156A (en) * | 1987-08-26 | 1989-03-03 | Meiwa Seishi Genryo Kk | Separation and recovering method for paper pulp component from magnetic recording paper and device used therefor |
| JPH01184048A (en) * | 1988-01-18 | 1989-07-21 | Meiwa Seishi Genryo Kk | Separation and recovery of discarded magnetic and non-magnetic recording papers from the mixture thereof and apparatus therefor |
| GB9104171D0 (en) * | 1991-02-27 | 1991-04-17 | British Ceramic Res Ltd | Improved ink |
| DE4124990A1 (en) * | 1991-07-27 | 1993-01-28 | Voith Gmbh J M | Recycled paper suspension - flows through a channel with a magnetic field to separate ferromagnetic material |
| US5217573A (en) * | 1992-04-23 | 1993-06-08 | International Paper Company | Removal of laser printer and xerographic ink from recycle paper |
-
1993
- 1993-04-21 GB GB9308250A patent/GB9308250D0/en active Pending
-
1994
- 1994-04-21 EP EP19940913168 patent/EP0697043A1/en not_active Withdrawn
- 1994-04-21 JP JP52293894A patent/JPH08509030A/en active Pending
- 1994-04-21 CN CN94191843A patent/CN1122151A/en active Pending
- 1994-04-21 CA CA 2161094 patent/CA2161094A1/en not_active Abandoned
- 1994-04-21 WO PCT/GB1994/000842 patent/WO1994024364A1/en not_active Application Discontinuation
- 1994-04-21 BR BR9406482A patent/BR9406482A/en not_active Application Discontinuation
- 1994-04-21 AU AU65420/94A patent/AU6542094A/en not_active Abandoned
- 1994-04-21 RU RU95122629A patent/RU2126860C1/en active
- 1994-04-21 GB GB9407903A patent/GB2277330B/en not_active Expired - Fee Related
-
1995
- 1995-10-19 FI FI954981A patent/FI954981A0/en unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1081259C (en) * | 1996-03-22 | 2002-03-20 | 曾其祥 | Method for removing spots on mica papermaking paper surface and its equipment |
| CN104827372A (en) * | 2015-04-28 | 2015-08-12 | 西南交通大学 | Mechanical printing paper ink removal method and mechanical printing paper ink removal device |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9308250D0 (en) | 1993-06-02 |
| WO1994024364A1 (en) | 1994-10-27 |
| GB9407903D0 (en) | 1994-06-15 |
| GB2277330B (en) | 1997-11-05 |
| FI954981A (en) | 1995-10-19 |
| FI954981A0 (en) | 1995-10-19 |
| JPH08509030A (en) | 1996-09-24 |
| AU6542094A (en) | 1994-11-08 |
| EP0697043A1 (en) | 1996-02-21 |
| CA2161094A1 (en) | 1994-10-27 |
| BR9406482A (en) | 1996-01-09 |
| GB2277330A (en) | 1994-10-26 |
| RU2126860C1 (en) | 1999-02-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4176054A (en) | Waste paper recycling | |
| EP0885325B1 (en) | Magnetic deinking of waste papers | |
| CN1122151A (en) | Improvements in or relating to deinking of paper | |
| US6245195B1 (en) | Decontamination of waste papers | |
| JPH11509589A (en) | Magnetic ink removal of waste paper | |
| CA2119748A1 (en) | Improved Deinking Method Using Ink Agglomeration | |
| US5639346A (en) | Magnetic removal of "stickies" from waste papers | |
| US5685952A (en) | Deinking of paper using magnetic forces | |
| KR100248474B1 (en) | Magnetic removal of "stickies"from waste papers | |
| GB2313608A (en) | Improvements in or relating to deinking of paper | |
| KR100301941B1 (en) | Self-Destruction of Abolition | |
| US5849149A (en) | Magnetic deinking of waste papers | |
| EP0869218A1 (en) | Magnetic removal of"stickies"from waste papers | |
| CN1077185C (en) | Magnetic deinking of waste paper | |
| EP1217121A1 (en) | Decontamination of waste papers | |
| US4904373A (en) | Fossil resin flotation from coal by selective coagulation and depression of coal | |
| JPH0665882A (en) | Method for treating recycled pulp | |
| CN111836927B (en) | Deinking method for UV printed matter | |
| KR20020045457A (en) | Decontamination of waste papers | |
| CN1360107A (en) | Purification of waste paper | |
| JPH07107235B2 (en) | Waste paper pulp processing method | |
| JPS583073B2 (en) | White water treatment method for paper manufacturing process using waste paper as raw material | |
| CA2328259A1 (en) | Decontamination of waste papers | |
| JP2002201579A (en) | Method for removing stain of waste paper | |
| MXPA98007311A (en) | Magnetic destination of desire papers |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |