EP0386436B1 - Procédé rationnel de désacidification non polluante et dans la masse de livres et autres produits papetiers - Google Patents

Procédé rationnel de désacidification non polluante et dans la masse de livres et autres produits papetiers Download PDF

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Publication number
EP0386436B1
EP0386436B1 EP90101632A EP90101632A EP0386436B1 EP 0386436 B1 EP0386436 B1 EP 0386436B1 EP 90101632 A EP90101632 A EP 90101632A EP 90101632 A EP90101632 A EP 90101632A EP 0386436 B1 EP0386436 B1 EP 0386436B1
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EP
European Patent Office
Prior art keywords
drying
chamber
deacidification
books
treatment chamber
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 - Lifetime
Application number
EP90101632A
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German (de)
English (en)
Other versions
EP0386436A3 (fr
EP0386436A2 (fr
Inventor
Jürgen Wittekind
Rolf Dipl.-Ing. Eggersdorfer
Peter Schwerdt
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.)
Battelle Ingenieurtechnik GmbH
Original Assignee
Battelle Institut eV
Battelle Ingenieurtechnik GmbH
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 Battelle Institut eV, Battelle Ingenieurtechnik GmbH filed Critical Battelle Institut eV
Priority to AT90101632T priority Critical patent/ATE104385T1/de
Publication of EP0386436A2 publication Critical patent/EP0386436A2/fr
Publication of EP0386436A3 publication Critical patent/EP0386436A3/fr
Application granted granted Critical
Publication of EP0386436B1 publication Critical patent/EP0386436B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
    • B41M7/0063—Preservation or restoration of currency, books or archival material, e.g. by deacidifying
    • 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
    • D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
    • D21H25/18—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00 of old paper as in books, documents, e.g. restoring

Definitions

  • the present invention relates to a method for environmentally friendly mass deacidification of books and other printed and paper products of all kinds such as magazines, files, etc., and an apparatus for performing this method.
  • a known method is to treat books with vapors of metal alkyls, especially vapors of diethyl zinc. Due to the moisture in the paper, the metal alkyls are converted into the oxides of the metals, e.g. converted to zinc oxide, which remains in the paper and is a good neutralizing agent for free acids.
  • the metal alkyls suitable for this application are self-igniting substances in air, which represent a constant fire and explosion hazard during handling and therefore require an extremely high level of care and appropriate qualifications.
  • the books are treated with a solution of an organomagnesium compound, such as, for example, methyl magnesium carbonate, in a suitable solvent after a previous drying.
  • an organomagnesium compound such as, for example, methyl magnesium carbonate
  • the magnesium compound is converted into magnesium oxide and magnesium carbonate by moisture in the paper, both of which are able to neutralize acids.
  • suitable solvents are fluorocarbons, e.g. Trichlorotrifluoroethane mixed with alcohols such as e.g. Methanol.
  • fluorocarbons and chlorofluorocarbons also offer good compatibility with most book materials such as paper, cardboard, printing inks, glue and other adhesives and are therefore particularly suitable for the present purpose.
  • the invention has for its object to provide a method according to the preamble of claim 1, which allows quick and therefore rational treatment for mass deacidification of books and other paper products in an environmentally friendly manner. Furthermore, an apparatus for performing the method according to the invention is to be specified. This object is solved by the subject matter of claims 1 and 6. Advantageous further developments are characterized in the subclaims.
  • the speed of the process sequence according to the invention is extremely important. It is not only advantageous, but ultimately enables the handling of large volumes of books, which will be required to a large extent in the future. Effective drying is extremely gentle due to the low heating of the treated print and paper products. As a result of the practically complete solvent removal that can be achieved in practical times, the solvents mentioned, which are suitable but are environmentally harmful, can also be used.
  • the speed of the process also offers the advantage that predrying, neutralization treatment and drying can be carried out in a single chamber, since time-consuming drying processes in special dryers are eliminated.
  • Such a chamber offers the advantage of a closed system with the optimal possibility of complete recording and controlled processing of the exhaust air quantities.
  • the expensive solvents can also be recovered by environmentally friendly separation, whereby all of the airborne amounts of solvent in the process are recorded.
  • the device in FIG. 1 has as its main component a single chamber 1 both for predrying and for treatment with solutions and subsequent post-drying.
  • the treatment chamber 1 is provided with a microwave generator 2, with which the interior of the chamber e.g. can be exposed to microwave radiation of 2450 MHz, as indicated schematically.
  • a microwave chamber with a radiation frequency of 2450 MHz was used.
  • the chamber 1 is connected via a valve to an air dryer 3, via which dried purging air can be supplied to the chamber. Furthermore, the chamber 1 is connected to a storage container 4 for treatment solutions via valves and cleaning filters, which are each provided in the inflow and outflow lines. A feed pump is provided in the feed line upstream of the filter.
  • the chamber 1 is connected to a vacuum pump 5, the chamber pressure being measurable and controllable by means of a pressure sensor PC (dashed line to the purge air valve).
  • the temperature in the chamber can also be controlled, a temperature sensor TC with corresponding feedback to the generator 2 being provided for this purpose.
  • the temperature of the outer wall of the chamber can be adjusted by means of an electrical, direct or indirect jacket heating indicated at 6 so that water vapor condensation on the chamber wall is avoided and microwave drying is accelerated.
  • a compressor 7 connected to the vacuum pump 5 via a valve is connected to the chamber 1 and represents the connection to the preparation and recovery devices for the solvents.
  • a solvent tank 8 is also connected to these devices via a corresponding recovery line.
  • This and a storage tank 9 for the active compound to be used - in the present case methyl magnesium carbonate - have supply lines to the storage container 4.
  • the solvent tank 8 is supplied by a device 10 for solvent preparation by drying and neutralization, which in turn is connected to a solvent collecting container 11.
  • This solvent collecting container 11 is connected, on the one hand, to a condenser 13 connected to a refrigeration machine 12, to which the exhaust air resulting from the after-drying is fed via the compressor 7.
  • the condenser 13 is connected via a valve to a device 14 for adsorptive exhaust air purification. This valve is also connected to a blower 15, which forms an adsorption treatment circuit with the device 14 and an air cooler 16 connected thereto and to the blower.
  • the device 14 for adsorptive exhaust air purification are supplied with desorption steam and, depending on the position of the valve to the condenser 13 and blower 15, either the exhaust air from the compressor or for dilution of the exhaust air additional air via the blower.
  • a valve for feeding in additional air is connected between air cooler 16 and blower 15.
  • an exhaust air valve for cleaned exhaust air is provided in front of the air cooler.
  • the device 14 for adsorptive exhaust air purification also supplies regenerated solvent to the solvent collecting container 11 via a further condenser 17 and a device 18 for water / desorbate phase separation, which is connected to a device 19 for water treatment.
  • the single-chamber process carried out with the device according to FIG. 1 for environmentally friendly mass deacidification of books proceeds as follows.
  • the books are used for back-to-back treatment in baskets made of a suitable material, such as polyethylene or polypropylene. By inserting spacers, the books can be fanned out and floating can be avoided.
  • the pre-drying is then carried out in the vacuum and pressure-resistant chamber 1.
  • the chamber is evacuated to a pressure of approximately 100 mbar using the vacuum pump 5.
  • the books are heated to a maximum of 60 ° C in the microwave field, using the pressure and temperature control mentioned.
  • a small air flow from the air dryer 3 conducted through the chamber and simultaneous jacket heating (6) of the chamber avoid water vapor condensation on the chamber wall and accelerate the drying.
  • the vacuum exhaust air is passed outside via pump 5.
  • the vacuum pump 5 is switched off and the treatment chamber 1 is flooded with neutralization solution.
  • an excess pressure is generated. If necessary, pressure pulsation and / or sonication with suitable frequencies can be used for an even better impregnation.
  • the solution is conveyed back into the storage container 4, the fine filter provided retaining dirt particles and rinsed-off magnesium oxide. Then the microwave generator 2 is switched on again and the drying of the Solvent is introduced.
  • the solvent adsorption in 14 is regenerated with water vapor supply and, if necessary, with vacuum support. After condensation and phase separation (17, 18), the solvent recovered from the collecting container 11, to which the solvent separated in the condenser 13 had also been fed, is neutralized and dried in the device 10 and then fed to the solvent tank 8.
  • the water condensate is either used again for regeneration or passed into the waste water.
  • all other exhaust air i.e. the chamber exhaust air during filling and emptying, as well as the exhaust air from the storage containers and from the water treatment, are fed to the facility for exhaust air purification.
  • the device outlined in FIG. 2 corresponds to the device from FIG. 1 except for the formation of an additional predrying chamber 20.
  • This chamber 20 is also connected to the air dryer 3 via a valve and is exposed to a microwave radiation with the generator 2.
  • the method also corresponds to that explained above, with a higher throughput being possible since, while a batch of books is predried, an already predried batch can be neutralized at the same time.
  • the process is also completely closed, since the exhaust air treatment in chamber 1 takes place, as in the example explained, without any emission of solvents into the environment.

Claims (7)

  1. Procédé de désacidification non polluante et dans la masse de livres et autres produits papetiers par application d'un traitement de neutralisation à l'aide de solutions de désacidification suivi d'un séchage des solvants, caractérisé en ce qu'un préséchage des livres ou autres produits papetiers, et le séchage après leur désacidification, sont respectivement effectués dans une chambre mise sous vide par réchauffage au moyen de rayonnement micro-ondes.
  2. Procédé selon la revendication 1, caractérisé en ce que l'on utilise des solutions connues d'un composé organique au magnésium dans du méthanol, de l'éthanol, un hydrocarbure fluoré, un hydrocarbure chlorofluoré, de l'essence ou dans des mélanges de ces matières, et en ce que le préséchage, la désacidification et le séchage sont effectués dans une chambre de traitement.
  3. Procédé selon l'une des revendications 1 et 2, caractérisé en ce que les vapeurs du ou des solvants sont extraites de l'air d'échappement provenant du séchage par condensation et/ou adsorption et/ou absorption.
  4. Procédé selon l'une des revendications 1 et 3, caractérisé en ce que le préséchage est effectué dans une chambre séparée.
  5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que l'on utilise un rayonnement micro-ondes d'une fréquence de 2.450 MHz pour le réchauffage.
  6. Dispositif destiné à la mise en oeuvre du procédé selon l'une quelconque des revendications 1 à 3 et 5, caractérisé en ce qu'il est prévu une seule chambre de traitement (1) avec une enveloppe chauffante (6) dont l'espace intérieur peut être exposé au rayonnement d'un générateur (2) de rayonnement microondes, et en ce que sont raccordés à la chambre de traitement, et regroupés avec elle en une unité mobile, des dispositifs (4, 8, 9 ; 10 à 19) d'alimentation et d'évacuation des solutions, des dispositifs (5) pour l'évacuation et des dispositifs (3) pour le séchage de l'air de balayage injecté, des dispositifs (7) pour l'évacuation des vapeurs contenues dans l'air d'échappement provenant du séchage et des dispositifs (13) pour l'extraction de ces vapeurs.
  7. Dispositif selon la revendication 6, caractérisé en ce qu'en plus de la chambre de traitement (1), il est prévu une chambre séparée (20) pour le préséchage sous vide, qui est alimentée en rayonnement micro-ondes par le même générateur que la chambre de traitement.
EP90101632A 1989-02-11 1990-01-27 Procédé rationnel de désacidification non polluante et dans la masse de livres et autres produits papetiers Expired - Lifetime EP0386436B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90101632T ATE104385T1 (de) 1989-02-11 1990-01-27 Rationelles verfahren zur umweltfreundlichen massenentsaeuerung von buechern und anderen papiererzeugnissen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3904111A DE3904111A1 (de) 1989-02-11 1989-02-11 Verfahren und vorrichtung zur umweltfreundlichen massenentsaeuerung von buechern und anderen papiererzeugnissen
DE3904111 1989-02-11

Publications (3)

Publication Number Publication Date
EP0386436A2 EP0386436A2 (fr) 1990-09-12
EP0386436A3 EP0386436A3 (fr) 1991-12-11
EP0386436B1 true EP0386436B1 (fr) 1994-04-13

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EP90101632A Expired - Lifetime EP0386436B1 (fr) 1989-02-11 1990-01-27 Procédé rationnel de désacidification non polluante et dans la masse de livres et autres produits papetiers

Country Status (5)

Country Link
US (1) US5120500A (fr)
EP (1) EP0386436B1 (fr)
AT (1) ATE104385T1 (fr)
CA (1) CA2009621A1 (fr)
DE (2) DE3904111A1 (fr)

Cited By (1)

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DE102008034100A1 (de) 2007-09-18 2009-03-19 Stu Fakulta Chemickej A Potravinárskej Technológie Mehrzweckvorrichtung zur Modifizierung von Zellulosematerialien und Art der Modifizierung von Zellulosematerialien

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US5219524A (en) * 1991-05-07 1993-06-15 Everseal Preservation Labs., Inc. System and method for preserving acid-containing articles
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ES2130994B1 (es) * 1996-01-05 2000-03-01 Univ Catalunya Politecnica Unas mejoras introducidas en el objeto de la patente de invencion n- 9600016 por equipo y procedimiento polivalente para desacidificacion, desinfestacion y densinfeccion en masa de documentos y libros.
ES2125792B1 (es) * 1996-01-05 1999-11-16 Univ Catalunya Politecnica Equipo y procedimiento para desacidificacion, desinfestacion y desinfeion en masa de documentos y libros.
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ES2154592B1 (es) 1999-05-27 2001-10-16 Univ Politecnica De Cataluna Equipo y procedimiento para la desacidificacion en masa, eliminacion de la acidez libre y desinfestacion de materiales celulosicos.
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JP4762835B2 (ja) 2006-09-07 2011-08-31 東京エレクトロン株式会社 基板処理方法、基板処理装置、プログラムおよびプログラム記録媒体
DE102014111807B4 (de) * 2014-08-19 2019-08-22 Wolfgang Balga Vorrichtung und Verfahren zur Bearbeitung von Film
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CN109944113A (zh) * 2019-01-29 2019-06-28 齐鲁工业大学 一种用于纸张浸没脱酸的干燥装置及方法
CN112391872B (zh) * 2019-08-16 2022-10-11 鼎纳科技有限公司 一种大型图书脱酸系统的使用方法
CN112391873B (zh) * 2019-08-16 2021-11-23 鼎纳科技有限公司 一种大型图书脱酸设备及其控制系统
CN114503965A (zh) * 2020-11-16 2022-05-17 杭州霍尔台克气体设备有限公司 一种真空充氮脱酸设备

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DE102008034100A1 (de) 2007-09-18 2009-03-19 Stu Fakulta Chemickej A Potravinárskej Technológie Mehrzweckvorrichtung zur Modifizierung von Zellulosematerialien und Art der Modifizierung von Zellulosematerialien

Also Published As

Publication number Publication date
EP0386436A3 (fr) 1991-12-11
DE3904111A1 (de) 1990-08-16
CA2009621A1 (fr) 1990-08-11
US5120500A (en) 1992-06-09
ATE104385T1 (de) 1994-04-15
DE59005307D1 (de) 1994-05-19
DE3904111C2 (fr) 1991-09-26
EP0386436A2 (fr) 1990-09-12

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