EP1440779A1 - Méthode pour imbiber par un agent d'imprégnation des solides perméable aux gaz - Google Patents

Méthode pour imbiber par un agent d'imprégnation des solides perméable aux gaz Download PDF

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Publication number
EP1440779A1
EP1440779A1 EP04001501A EP04001501A EP1440779A1 EP 1440779 A1 EP1440779 A1 EP 1440779A1 EP 04001501 A EP04001501 A EP 04001501A EP 04001501 A EP04001501 A EP 04001501A EP 1440779 A1 EP1440779 A1 EP 1440779A1
Authority
EP
European Patent Office
Prior art keywords
pressure
solid
bar
wood
impregnation medium
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
EP04001501A
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German (de)
English (en)
Other versions
EP1440779B1 (fr
EP1440779B9 (fr
Inventor
Hans Dr. Korte
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.)
Haussermann & Co KG GmbH
Original Assignee
Haussermann & Co KG GmbH
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Publication date
Application filed by Haussermann & Co KG GmbH filed Critical Haussermann & Co KG GmbH
Publication of EP1440779A1 publication Critical patent/EP1440779A1/fr
Publication of EP1440779B1 publication Critical patent/EP1440779B1/fr
Application granted granted Critical
Publication of EP1440779B9 publication Critical patent/EP1440779B9/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
    • B27K3/02—Processes; Apparatus
    • B27K3/0278—Processes; Apparatus involving an additional treatment during or after impregnation
    • B27K3/0285—Processes; Apparatus involving an additional treatment during or after impregnation for improving the penetration of the impregnating fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
    • B27K3/02—Processes; Apparatus
    • B27K3/08—Impregnating by pressure, e.g. vacuum impregnation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
    • B27K3/007—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process employing compositions comprising nanoparticles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
    • B27K3/16—Inorganic impregnating agents

Definitions

  • the invention relates to a method for impregnating solids with a liquid Impregnating agent.
  • the process focuses on the impregnation of wood and Wood-based materials, but is feasible for all solids compressed by a Are permeable to gas, including ceramic, mineral, natural or synthetic solids.
  • the aim of the process is to improve the technical or aesthetic properties of the solid.
  • the invention is focused the impregnation of wood and wood-based materials, because these are complex Construction and poor mobility for an impregnation medium in particular make high demands on process management.
  • Impregnating wood with impregnating agents to increase durability, for Improvement of mechanical properties, for coloring or for digestion the wood structure has been carried out for a long time.
  • Wood is usually soaked with liquid soaking agents. Accordingly, there are many on this topic Studies that deal with the influence of the wood properties, the soaking agents, of the impregnation pressure and the impregnation time on the impregnation of the wood.
  • Impregnation media of classic pressure impregnation e.g. Copper-, Chromium or arsenic salts, but also not available for many color or aroma substances is.
  • the pressure is continuously raised up to the supercritical range and varied there if necessary. Processes of this type often lead to damage to the material to be impregnated, because typical strength properties are not taken into account, or only a few materials can be processed with these processes without damage.
  • the object of the invention is to use a pressure impregnation method even with heavy impregnable solids, such as. B. spruce wood, an impregnation medium for change of the property spectrum (biological, chemical, physical or other Properties) into the interior of the solid or impregnated material without the Structure, e.g. due to previous perforation or cell collapse and / or crack formation, to harm.
  • heavy impregnable solids such as. B. spruce wood
  • this method can be used with any gases and various liquids be performed.
  • gases whose critical condition points are moderate Pressure-temperature range, that is preferably between 20-150 bar and 20-150 ° C
  • gases whose critical condition points are moderate Pressure-temperature range, that is preferably between 20-150 bar and 20-150 ° C
  • gases whose critical condition points are moderate Pressure-temperature range, that is preferably between 20-150 bar and 20-150 ° C
  • gases whose critical condition points are moderate Pressure-temperature range, that is preferably between 20-150 bar and 20-150 ° C
  • ethane, ethene, propane, propene, carbon dioxide or some halogenated Alkanes can be obtained by dissolving part of the compressed gas in the liquid Impregnation medium can also achieve a reduction in viscosity and thus an improved penetration into the solid.
  • the loading i.e. the share of the Impregnation medium that remains in the solid after impregnation is with the inventive method particularly high.
  • alternating pressure phases favor as well as circulation of the impregnation medium, an accelerated and homogeneous distribution of the impregnation medium in the solid.
  • alternating pressure phases there is a pressure change preferably by lowering the pressure in the autoclave and then raising it pressure to the previous maximum pressure.
  • the new process differs significantly from the state of the art in several points Technology. On the one hand, it allows at high pressures, especially in the range of 15 bar up to 300 bar, the use of common solvents (water, organic substances such as. Alcohols, ketones, esters, synthetic, mineral, vegetable or animal Oils) as the basis for the liquid impregnation medium.
  • solvents water, organic substances such as. Alcohols, ketones, esters, synthetic, mineral, vegetable or animal Oils
  • Nanosilicates can be dispersed in alcohols, preferably in ethanol become. This mixture is then an impregnation medium which, after application of the Protection pressure can be introduced in wood. After impregnation the alcohol evaporates and a nanosilicate solidified and hydrophobic remains Wood.
  • a protective pressure of approx. 15 to approx. 100 bar is set without the physical To change or damage properties or the structure of the solid. Likewise, the pressure increases when or after the impregnation medium has been introduced, without causing damage to the solid, since this solid after building up the Protective pressure is only exposed to a relatively small pressure difference.
  • the protective pressure is preferred by one after the impregnation medium has been introduced Amount from approx. 30 to approx. 200 bar, i.e. increased to a maximum of approx. 300 bar.
  • the Pressure increases with an increase rate of approx. 5 bar / hour to approx. 150 bar / hour.
  • the rate of increase will include depending on the permeability of the Solid, the type of protective gas and the liquid impregnation medium selected.
  • the process can also be applied to other impregnation goods in addition to wood, such as B. food, feed, seeds and various organic or inorganic carrier materials are used.
  • the process according to the invention was tested in a high-pressure autoclave apparatus on various types of wood (fir, spruce, pine, birch and beech).
  • the main gases used are carbon dioxide, but also nitrogen and R 134 a (halogenated alkane).
  • the impregnation medium is composed of a solvent with the active ingredient dissolved in it.
  • a dye was first added to the impregnation medium as an active ingredient.
  • the heart of the apparatus is a high-pressure stirring autoclave with a capacity of 1.8 liters. It is for a maximum operating pressure of 350 bar at 300 ° C designed. Depending on the size of the test specimen, a frame can be used, on which different types of samples can be placed on three levels.
  • the gas will introduced into the autoclave via a pressure converter driven by compressed air.
  • the liquid impregnation medium is set against a previously set one with a high pressure pump Protective pressure pumped into the autoclave.
  • the compressed gas passes through it pumped impregnation medium and reduces its viscosity.
  • a pneumatic driven propeller stirrer the gas-containing liquid impregnation medium in the Autoclaves are circulated.
  • the autoclave is heated electrically from the outside via a heating jacket that is connected to the temperature control.
  • phase 4 The longest time interval of the process is typically the impregnation step with increasing pressure (phase 4).
  • the dwell time is required if larger Workpieces a complete penetration of the workpiece with the impregnation medium is to be guaranteed.
  • Phase 5 can either with constant pressure or with pressure changes with individual reductions below the maximum pressure.
  • Neozapon red 335 dissolved in ethanol, was used as the coloring medium. Spruce and beech with the dimensions 2 x 4 x 19 cm were used as woods. The brain surfaces of the woods were sealed with epoxy resin. The pressure was built up over 40 minutes by supplying CO 2 up to 50 bar. After the pressure had built up, the temperature reached about 60 ° C. The woods remained under protective gas pressure for 1 hour under these conditions. The dye solution was metered in within 20 minutes. The pressure in the autoclave rose to 65 bar. By supplying gas, the pressure was increased to 115 bar over a period of 1 hour and 50 minutes. During the duration of the pressure rise, the temperature averaged 58 ° C. At a pressure of 115 bar, the wood stayed in the pressure vessel for 15 minutes. The contents of the autoclave were then drained off and ambient pressure was reached after 80 minutes. The temperature dropped to 50 ° C during the pressure drop.
  • a commercial impregnating agent a spray and brush stain type S 9900 from Zweihorn, based on water-alcohol, was used.
  • a sample of pine wood with the dimensions 4.5 cm x 4.5 cm (wood cross section) x 20 cm (length in the direction of the fibers) was used in the autoclave.
  • the autoclave was then filled for about 15 minutes with CO 2 , which acts as a compressed gas, up to a pressure of 50 bar at a temperature of about 50 ° C.
  • the set pressure was maintained for about 15 minutes to ensure that the protective pressure developed inside the wood.
  • the liquid impregnation agent was conveyed into the autoclave in about 15 minutes using the high-pressure pump integrated in the system.
  • the gas phase was reduced by a valve attached to the top of the autoclave.
  • the pressure in the autoclave was increased to 100 bar over a period of 120 minutes.
  • the autoclave was depressurized to normal pressure in 50 minutes.
  • Isobaric metering of the dye solution was accomplished by repeatedly venting gas through a drain valve attached to the top of the autoclave. The pressure was then increased to 100 bar at a rate of 25 bar / h for 2 hours. After reaching the selected maximum pressure, the pressure was released to ambient pressure within 50 minutes by releasing the liquid and gas.
  • the fir wood used was undamaged and almost even after the treatment colored.
  • the second sample crystallized out due to vacuum drying of the nanosilicates on the surface of the beech wood.
  • Example 4 shows that wood can also be impregnated with solids by means of the method according to the invention via liquid impregnation media, provided that these have appropriate dimensions.
  • the introduction of nanosilicates hardens the wood e.g. B. against insect infestation and it hydrophobicizes the wood.
  • Impregnation with CO 2 leads to the precipitation of nanosilicates. Surprisingly, the impregnation works well when nitrogen is used.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Paper (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
EP04001501A 2003-01-24 2004-01-23 Méthode pour imbiber par un agent d'imprégnation des solides perméable aux gaz Expired - Lifetime EP1440779B9 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10302937 2003-01-24
DE10302937A DE10302937A1 (de) 2003-01-24 2003-01-24 Verfahren zum Imprägnieren von Feststoffen mit einem flüssigen Imprägniermittel

Publications (3)

Publication Number Publication Date
EP1440779A1 true EP1440779A1 (fr) 2004-07-28
EP1440779B1 EP1440779B1 (fr) 2006-06-28
EP1440779B9 EP1440779B9 (fr) 2007-02-28

Family

ID=32520103

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04001501A Expired - Lifetime EP1440779B9 (fr) 2003-01-24 2004-01-23 Méthode pour imbiber par un agent d'imprégnation des solides perméable aux gaz

Country Status (3)

Country Link
EP (1) EP1440779B9 (fr)
AT (1) ATE331593T1 (fr)
DE (2) DE10302937A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015067275A1 (fr) * 2013-11-06 2015-05-14 Superwood A/S Procédé de traitement d'essence forestière à l'aide d'un liquide

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010001424A1 (de) * 2010-02-01 2011-08-04 Fränkische Holzveredelungs-GmbH, 97353 Verfahren zum Färben von Holzstücken
CN107931058A (zh) * 2017-11-16 2018-04-20 安徽国电能源设备工程有限公司 一种电热锅炉工件的喷漆处理方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH514411A (de) * 1967-07-03 1971-10-31 Mo Och Domsjoe Ab Verfahren zur Tränkung dicker Gegenstände aus Cellulosematerial durch Druckimprägnierung
DE4202320A1 (de) * 1992-01-29 1993-08-05 Dierk Dr Knittel Verfahren zum impraegnieren von substraten
US20020168473A1 (en) * 2001-05-08 2002-11-14 Degussa Ag Antimicrobial treatment of porous materials

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5996782A (en) * 1997-04-14 1999-12-07 Sealed Air Corporation Foam in bag packaging system for manual use
FR2770171B1 (fr) * 1997-10-27 1999-11-19 Commissariat Energie Atomique Procede et installation de traitement d'un materiau poreux par un produit d'impregnation
DK199801456A (da) * 1998-11-10 2000-05-11 Fls Miljoe A S Fremgangsmåde til imprægnering eller ekstrahering af et harpiksholdigt træsubstrat
DK199801455A (da) * 1998-11-10 2000-05-11 Fls Miljoe A S Fremgangsmåde til imprægnering eller ekstrahering af et harpiksholdigt træsubstrat
DE10041003A1 (de) * 2000-08-22 2002-03-28 Sueddeutsche Kalkstickstoff Verfahren zum Imprägnieren einer Trägermatrix mit festen und/oder flüssigen Verbindungen mit Hilfe komprimierter Gase und so imprägnierte Stoffe

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH514411A (de) * 1967-07-03 1971-10-31 Mo Och Domsjoe Ab Verfahren zur Tränkung dicker Gegenstände aus Cellulosematerial durch Druckimprägnierung
DE4202320A1 (de) * 1992-01-29 1993-08-05 Dierk Dr Knittel Verfahren zum impraegnieren von substraten
US20020168473A1 (en) * 2001-05-08 2002-11-14 Degussa Ag Antimicrobial treatment of porous materials

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015067275A1 (fr) * 2013-11-06 2015-05-14 Superwood A/S Procédé de traitement d'essence forestière à l'aide d'un liquide
US11052567B2 (en) 2013-11-06 2021-07-06 Superwood A/S Method for liquid treatment of a wood species

Also Published As

Publication number Publication date
EP1440779B1 (fr) 2006-06-28
DE10302937A1 (de) 2004-08-05
ATE331593T1 (de) 2006-07-15
EP1440779B9 (fr) 2007-02-28
DE502004000852D1 (de) 2006-08-10

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