EP2272644A1 - Procédé destiné à la réduction de l'émission d'aldéhydes et de liaisons organiques volatiles à partir de matières dérivées du bois - Google Patents
Procédé destiné à la réduction de l'émission d'aldéhydes et de liaisons organiques volatiles à partir de matières dérivées du bois Download PDFInfo
- Publication number
- EP2272644A1 EP2272644A1 EP09008805A EP09008805A EP2272644A1 EP 2272644 A1 EP2272644 A1 EP 2272644A1 EP 09008805 A EP09008805 A EP 09008805A EP 09008805 A EP09008805 A EP 09008805A EP 2272644 A1 EP2272644 A1 EP 2272644A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wood
- lignocellulose
- products
- urea
- thiosulfate
- 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
Links
- 239000000463 material Substances 0.000 title claims abstract description 49
- 150000001299 aldehydes Chemical class 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims description 29
- 150000002894 organic compounds Chemical class 0.000 title 1
- 239000002023 wood Substances 0.000 claims abstract description 90
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims abstract description 81
- 239000012855 volatile organic compound Substances 0.000 claims abstract description 42
- 239000000853 adhesive Substances 0.000 claims abstract description 31
- 230000001070 adhesive effect Effects 0.000 claims abstract description 31
- 239000000654 additive Substances 0.000 claims abstract description 26
- 230000000996 additive effect Effects 0.000 claims abstract description 19
- 239000000203 mixture Substances 0.000 claims abstract description 12
- DHCDFWKWKRSZHF-UHFFFAOYSA-L thiosulfate(2-) Chemical group [O-]S([S-])(=O)=O DHCDFWKWKRSZHF-UHFFFAOYSA-L 0.000 claims abstract description 10
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims abstract description 7
- 150000001342 alkaline earth metals Chemical class 0.000 claims abstract description 7
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 6
- 239000011094 fiberboard Substances 0.000 claims abstract description 5
- 229910052783 alkali metal Inorganic materials 0.000 claims abstract description 4
- 150000001340 alkali metals Chemical class 0.000 claims abstract description 4
- 238000010438 heat treatment Methods 0.000 claims abstract 3
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 29
- 235000013877 carbamide Nutrition 0.000 claims description 18
- 239000004202 carbamide Substances 0.000 claims description 16
- 150000004764 thiosulfuric acid derivatives Chemical class 0.000 claims description 14
- 150000003672 ureas Chemical class 0.000 claims description 12
- XYXNTHIYBIDHGM-UHFFFAOYSA-N ammonium thiosulfate Chemical compound [NH4+].[NH4+].[O-]S([O-])(=O)=S XYXNTHIYBIDHGM-UHFFFAOYSA-N 0.000 claims description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 6
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 claims description 6
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 claims description 6
- 235000019345 sodium thiosulphate Nutrition 0.000 claims description 6
- 229920001807 Urea-formaldehyde Polymers 0.000 claims description 5
- 239000011093 chipboard Substances 0.000 claims description 5
- 239000003513 alkali Substances 0.000 claims description 4
- 238000004026 adhesive bonding Methods 0.000 claims description 3
- SLGWESQGEUXWJQ-UHFFFAOYSA-N formaldehyde;phenol Chemical compound O=C.OC1=CC=CC=C1 SLGWESQGEUXWJQ-UHFFFAOYSA-N 0.000 claims description 3
- 229920001568 phenolic resin Polymers 0.000 claims description 3
- ODGAOXROABLFNM-UHFFFAOYSA-N polynoxylin Chemical compound O=C.NC(N)=O ODGAOXROABLFNM-UHFFFAOYSA-N 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 229920002522 Wood fibre Polymers 0.000 claims description 2
- FAYYUXPSKDFLEC-UHFFFAOYSA-L calcium;dioxido-oxo-sulfanylidene-$l^{6}-sulfane Chemical compound [Ca+2].[O-]S([O-])(=O)=S FAYYUXPSKDFLEC-UHFFFAOYSA-L 0.000 claims description 2
- GMKDNCQTOAHUQG-UHFFFAOYSA-L dilithium;dioxido-oxo-sulfanylidene-$l^{6}-sulfane Chemical compound [Li+].[Li+].[O-]S([O-])(=O)=S GMKDNCQTOAHUQG-UHFFFAOYSA-L 0.000 claims description 2
- FGRVOLIFQGXPCT-UHFFFAOYSA-L dipotassium;dioxido-oxo-sulfanylidene-$l^{6}-sulfane Chemical compound [K+].[K+].[O-]S([O-])(=O)=S FGRVOLIFQGXPCT-UHFFFAOYSA-L 0.000 claims description 2
- HANVTCGOAROXMV-UHFFFAOYSA-N formaldehyde;1,3,5-triazine-2,4,6-triamine;urea Chemical compound O=C.NC(N)=O.NC1=NC(N)=NC(N)=N1 HANVTCGOAROXMV-UHFFFAOYSA-N 0.000 claims description 2
- HMJMQKOTEHYCRN-UHFFFAOYSA-N formaldehyde;phenol;1,3,5-triazine-2,4,6-triamine;urea Chemical compound O=C.NC(N)=O.OC1=CC=CC=C1.NC1=NC(N)=NC(N)=N1 HMJMQKOTEHYCRN-UHFFFAOYSA-N 0.000 claims description 2
- 229940062135 magnesium thiosulfate Drugs 0.000 claims description 2
- TZKHCTCLSRVZEY-UHFFFAOYSA-L magnesium;dioxido-oxo-sulfanylidene-$l^{6}-sulfane Chemical compound [Mg+2].[O-]S([O-])(=O)=S TZKHCTCLSRVZEY-UHFFFAOYSA-L 0.000 claims description 2
- DSKJXGYAJJHDOE-UHFFFAOYSA-N methylideneurea Chemical compound NC(=O)N=C DSKJXGYAJJHDOE-UHFFFAOYSA-N 0.000 claims description 2
- 239000002025 wood fiber Substances 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims 2
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 235000019256 formaldehyde Nutrition 0.000 claims 1
- 239000012948 isocyanate Substances 0.000 claims 1
- 150000002513 isocyanates Chemical class 0.000 claims 1
- 238000003754 machining Methods 0.000 claims 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract description 4
- 229910021529 ammonia Inorganic materials 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 22
- 238000004519 manufacturing process Methods 0.000 description 12
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 8
- 230000007774 longterm Effects 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 7
- 150000001875 compounds Chemical class 0.000 description 6
- 239000000126 substance Substances 0.000 description 5
- -1 among others Substances 0.000 description 4
- 238000002144 chemical decomposition reaction Methods 0.000 description 4
- HGBOYTHUEUWSSQ-UHFFFAOYSA-N pentanal Chemical compound CCCCC=O HGBOYTHUEUWSSQ-UHFFFAOYSA-N 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 229920002488 Hemicellulose Polymers 0.000 description 3
- 229920002678 cellulose Polymers 0.000 description 3
- 239000001913 cellulose Substances 0.000 description 3
- 239000007857 degradation product Substances 0.000 description 3
- 235000014113 dietary fatty acids Nutrition 0.000 description 3
- 229930195729 fatty acid Natural products 0.000 description 3
- 239000000194 fatty acid Substances 0.000 description 3
- 150000004665 fatty acids Chemical class 0.000 description 3
- 229920005610 lignin Polymers 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 235000007586 terpenes Nutrition 0.000 description 3
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 2
- VGGLHLAESQEWCR-UHFFFAOYSA-N N-(hydroxymethyl)urea Chemical compound NC(=O)NCO VGGLHLAESQEWCR-UHFFFAOYSA-N 0.000 description 2
- 229920000538 Poly[(phenyl isocyanate)-co-formaldehyde] Polymers 0.000 description 2
- 229920003180 amino resin Polymers 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- BQOFWKZOCNGFEC-UHFFFAOYSA-N carene Chemical compound C1C(C)=CCC2C(C)(C)C12 BQOFWKZOCNGFEC-UHFFFAOYSA-N 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 239000012084 conversion product Substances 0.000 description 2
- 239000003925 fat Substances 0.000 description 2
- DCAYPVUWAIABOU-UHFFFAOYSA-N hexadecane Chemical compound CCCCCCCCCCCCCCCC DCAYPVUWAIABOU-UHFFFAOYSA-N 0.000 description 2
- JARKCYVAAOWBJS-UHFFFAOYSA-N hexanal Chemical compound CCCCCC=O JARKCYVAAOWBJS-UHFFFAOYSA-N 0.000 description 2
- 238000007731 hot pressing Methods 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- 239000012978 lignocellulosic material Substances 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 150000003505 terpenes Chemical class 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- GRWFGVWFFZKLTI-UHFFFAOYSA-N α-pinene Chemical compound CC1=CCC2C(C)(C)C1C2 GRWFGVWFFZKLTI-UHFFFAOYSA-N 0.000 description 2
- WTARULDDTDQWMU-RKDXNWHRSA-N (+)-β-pinene Chemical compound C1[C@H]2C(C)(C)[C@@H]1CCC2=C WTARULDDTDQWMU-RKDXNWHRSA-N 0.000 description 1
- WTARULDDTDQWMU-IUCAKERBSA-N (-)-Nopinene Natural products C1[C@@H]2C(C)(C)[C@H]1CCC2=C WTARULDDTDQWMU-IUCAKERBSA-N 0.000 description 1
- GRWFGVWFFZKLTI-IUCAKERBSA-N 1S,5S-(-)-alpha-Pinene Natural products CC1=CC[C@@H]2C(C)(C)[C@H]1C2 GRWFGVWFFZKLTI-IUCAKERBSA-N 0.000 description 1
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical class [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 241000218631 Coniferophyta Species 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 241000294754 Macroptilium atropurpureum Species 0.000 description 1
- WTARULDDTDQWMU-UHFFFAOYSA-N Pseudopinene Natural products C1C2C(C)(C)C1CCC2=C WTARULDDTDQWMU-UHFFFAOYSA-N 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- XCPQUQHBVVXMRQ-UHFFFAOYSA-N alpha-Fenchene Natural products C1CC2C(=C)CC1C2(C)C XCPQUQHBVVXMRQ-UHFFFAOYSA-N 0.000 description 1
- MVNCAPSFBDBCGF-UHFFFAOYSA-N alpha-pinene Natural products CC1=CCC23C1CC2C3(C)C MVNCAPSFBDBCGF-UHFFFAOYSA-N 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229930006722 beta-pinene Natural products 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 125000005442 diisocyanate group Chemical group 0.000 description 1
- 235000019197 fats Nutrition 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- LCWMKIHBLJLORW-UHFFFAOYSA-N gamma-carene Natural products C1CC(=C)CC2C(C)(C)C21 LCWMKIHBLJLORW-UHFFFAOYSA-N 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000005923 long-lasting effect Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- QUBQYFYWUJJAAK-UHFFFAOYSA-N oxymethurea Chemical compound OCNC(=O)NCO QUBQYFYWUJJAAK-UHFFFAOYSA-N 0.000 description 1
- 229950005308 oxymethurea Drugs 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000011122 softwood Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000010626 work up procedure Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N1/00—Pretreatment of moulding material
- B27N1/003—Pretreatment of moulding material for reducing formaldehyde gas emission
Definitions
- the present invention relates to a process for the production of wood-based materials from lignocellulose-containing comminution products, wherein a reduction of the emission of volatile organic compounds and aldehydes including formaldehyde from wood, the crushed products and the wood-based material produced is achieved. More particularly, the present invention relates to methods for reducing the emission of volatile organic compounds and aldehydes, including formaldehyde, wherein wood or the lignocellulosic minerals are treated with thiosulfates, preferably a certain combination of thiosulfate and urea compounds, to control the emission of such volatile organic compounds To prevent aldehydes from the wood or the manufactured wood material. Furthermore, the present invention relates to wood materials that can be produced by this process. In particular, the present invention provides treating agents for treating wood or lignocellulosic crushing products and wood-based materials made therefrom that are capable of reducing the emission of aldehydes, including formaldehyde and volatile organic compounds, and their corresponding use
- Lignocellulosic or lignocellulosic materials such as wood and wood pulp products, and derived timber products, such as wood-based panels, include volatile organic compounds (VOCs) and very volatile organic compounds (VVOCs), such as formaldehyde. Volatile organic compounds are subsumed with all volatile organic compounds whose retention time in the gas chromatogram lies between C6 (hexane) and C16 (hexadecane). Among the very volatile organic compounds, among others, formic acid and formaldehyde are counted.
- aldehydes as used herein includes not only the volatile compounds but also all other aldehydes, especially formaldehyde, unless otherwise specified.
- Volatile organic compounds and very volatile organic compounds occur depending on the nature and condition of the lignocelluloses, such as the type of wood, the storage period, the storage conditions of the wood or the comminution products of lignocellulose, in different chemical compositions and amounts.
- the VOCs are derived essentially from extractives of the lignocelluloses, e.g. of wood or conversion products. Prominent representatives of these are substances such as alpha-pinene, beta-pinene, delta-3-carene. Especially in the wood of the conifers, these components are found again. Conversion products, e.g. during storage and processing of the wood and shredded products, e.g. Pentanal and hexanal.
- softwoods which mainly produce chipboard, medium-density fiberboard (MDF) or OSB boards, contain large quantities of resin and fats which lead to the formation of volatile organic terpene compounds and aldehydes. Some of these substances are also formed by degradation of the main components of the wood, such as lignin, cellulose and hemicellulose. VOCs including aldehydes and formaldehyde may also be formed by the use of certain adhesives for the manufacture of wood-based materials.
- Adhesives currently used in the manufacture of wood-based materials such as OSB boards, medium density fiberboard, etc. include aminoplast adhesives such as urea-formaldehyde (UF) adhesives, melamine-urea-phenol-formaldehyde adhesives (MUPF adhesives) or melamine-urea-formaldehyde adhesives (MUF adhesives).
- aminoplast adhesives such as urea-formaldehyde (UF) adhesives, melamine-urea-phenol-formaldehyde adhesives (MUPF adhesives) or melamine-urea-formaldehyde adhesives (MUF adhesives).
- Other adhesives typically used in wood-based materials include diisocyanate-based adhesives (PMDI), polyurethane adhesives, phenol-formaldehyde (PF) adhesives, and / or tannin-formaldehyde (TF) adhesives, or mixtures thereof.
- PMDI diisocyanate-based adhesives
- PF
- VOCs and the formaldehyde take place both during the production of the wood-based materials as well as after their production or in their application.
- partial chemical degradation of the wood may occur.
- volatile compounds such as aldehydes and acids, then emit during the later manufacturing process or later use of the produced wood materials. They can also have a negative influence on the bond strength and thus adversely affect the properties of the produced wood materials.
- the WO 02/072323 describes methods for reducing the emission of formaldehyde from layered products containing at least two layers, wherein the surface of a plate or a veneer is treated with a solution containing sulfite or bisulfite.
- the examples illustrate that veneer is treated with a sulfite solution to lower formaldehyde emission.
- From the WO 2007/012350 are known processes for the production of wood-based articles with low emission of chemical compounds, namely low formaldehyde emission when using formaldehyde-containing resins.
- the treatment of wood chips or wood fibers with bisulfite is proposed.
- the wood materials produced by methods of the prior art show an unsatisfactory VOC and aldehyde emission, especially during prolonged use.
- VOCs especially the aldehydes
- formaldehyde emission of wood-based materials it is an object of the present invention using chemical additives to limit the emission of VOCs (especially the aldehydes) and preferably also the formaldehyde emission of wood-based materials to a low level. In doing so, as little as possible should be intervened in the technological process of wood-based material production in order to avoid costly technological adjustments or conversion measures. In addition, a chemical disturbance of the process must also be avoided. When using the usual formaldehyde-containing adhesives whose curing takes place under high temperatures and high pressure. Furthermore, it is an object of the present invention to minimize the emission of aldehydes and VOCs over the entire period, that is to say during the production and the later, longer use of the produced wood-based materials.
- the object is achieved by adding a special composition to the wood or the lignocellulose-containing comminution products or the wood-based materials in order, by reaction with the VOCs and the aldehydes, to modify them such that they no longer consist of the wood or of the comminuted products emit the wood materials produced from the shredded products.
- the resulting compounds are so high molecular weight that they are no longer volatile and thus no longer contribute in the long term to the VOC emissions or aldehyde emissions including formaldehyde emissions.
- wood-based materials made of wood or the lignocellulose-containing shredded products are in particular the release of the VOCs and aldehydes when in use. That is, the wood-based materials emit VOCs and aldehydes, including formaldehyde, in wood over a long period of time. These arise in part, as outlined above, over time by chemical reactions in the lignocellulosic wood material. For example, by the action of light, oxygen, etc. corresponding degradation products of wood ingredients, such as fatty acids, but also lignin, cellulose and hemicellulose arise in the produced wood material, which then as a corresponding primary emission or secondary or tertiary emissions, as stated above, from the Emit wood.
- VOCs and aldehydes including formaldehyde
- the addition of the additive may take place before or after the comminution and work-up of the comminuted products, e.g. B. after the refiner in fibers done.
- the additives can be impregnated into the wood, the lignocellulosic crushing products can be treated with the additives z. B. be impregnated.
- the application of the additives takes place immediately before the hot pressing or before the dryer.
- the addition of the adhesive can be carried out before or after the application of the additive.
- the individual components of the additive can be applied simultaneously or separately. In other words, the additive can be applied in solution to the lignocellulose-containing comminution products by conventional means. Alternatively, the lignocellulose-containing comminution products can be treated individually with the components.
- the component from the group i) before or after the component from the group ii) are applied separately.
- This application or treatment can be carried out before or after application of the adhesive.
- the adhesive can also be effected between the application of a first component of the additive and the second component of the additive.
- a significant advantage of the present invention is provided in additives that reduce in a reduction step aldehydes but also other volatile organic compounds, especially those with double bonds, so that the emission of these VOCs and aldehydes including formaldehyde are also reduced in the long term and a disorder the technological process does not occur.
- thiosulfates in particular the general formula MeS 2 O 3 or Me 2 (S 2 O 3 ) wherein Me is an alkali, alkaline earth metal or ammonium
- the emissions, in particular the long-term emission of VOCs and aldehydes including Formaldehyde can be reduced from wood and wood-based materials.
- the additive thus preferably contains at least one component in each case from the two groups i) and ii).
- Group i) comprises thiosulfates.
- they are thiosulfates of the general formula MeS 2 O 3 or Me 2 (S 2 O 3 ), where Me is an alkali metal, alkaline earth metal, or ammonium.
- Me is an alkali metal, alkaline earth metal, or ammonium.
- Preferred is the thiosulfate of one of the group of sodium thiosulfate, ammonium thiosulfate, lithium thiosulfate, potassium thiosulfate, calcium thiosulfate, magnesium thiosulfate.
- the thiosulfate salt used is sodium thiosulfate or ammonium thiosulfate and most preferably ammonium thiosulfate.
- the components mentioned antioxidant properties can suppress the VOC emission, which are caused for example by oxidation.
- the resulting from the thiosulfate intermediate sulfite may, for. B. with isolated double bonds, such as those contained in, inter alia, terpenes, fats or fatty acids, by reduction or addition with these compounds.
- At least one thiosulfate is added to the comminution products.
- the salts used are preferably ammonium thiosulfate and / or sodium thiosulfate.
- Group ii) comprises urea and urea derivatives, such as monomethylolurea or methyleneurea. Preference is given to using urea.
- Urea also reacts with formaldehyde to form mono- and dimethylolurea. This reaction is very slow and thus also allows a long-term lowering of the formaldehyde levels in the wood materials.
- urea alone is not meaningful because the reaction with formaldehyde is very slow and it is an equilibrium reaction, so that formaldehyde can be released at a later date again.
- a combination of at least one component of group i) and at least one component from group ii) is added to the wood or the comminution products or the wood-based materials in the process according to the invention. Due to the different reaction modes or reaction times of the added components in relation to formaldehyde and VOC, the long-term emission of VOC and formaldehyde can be very effectively changed, thereby optimizing the properties of the wood-based materials. Furthermore, thiosulfate salts of group i) are suitable for stabilizing ureas of group ii) by preventing urea hydrolysis. Thus, a better effectiveness of group ii) can be assumed.
- the at least one thiosulfate salt is added in an amount of from 0.1% by weight to 5% by weight, based on atro-lignocellulose. Particular preference is given to amounts of from 0.2% by weight to 1.5% by weight, for. B. a mixture with about 57% solids content with 1% dosed on atro wood.
- the amount of urea is preferably in the range of 0.5% by weight to 5% by weight, based on atorocellulose.
- the treatment agents according to the invention can be used to reduce emissions from wood, lignocellulose-containing comminution products or wood-based materials, for. B. in the production of wood-based materials are used, wherein the addition is carried out according to the method according to the invention advantageously via standard equipment for binder dosing, such as Beleimtrommel, blow-line gluing or dry gluing.
- the addition of the solution to the mat via nozzles directly in front of the hot press is possible.
- the additive is not mixed with the adhesive, but added before or after application of the adhesive crushing products immediately prior to hot pressing. It is not limited only to formaldehyde-containing adhesives, but also extends to all other thermosetting or thermosetting adhesives used in wood-based materials, such as e.g. PMDI.
- the wood can be impregnated directly with the additives according to the invention. This impregnation can take place before the comminution of the wood; An impregnation after production of the wood material is also possible.
- the present invention further relates to compositions (treating agents) for treating wood, lignocellulose-containing comminution products and wood-based materials and for reducing the emission of volatile organic compounds (VOC) and aldehydes, including formaldehyde, comprising at least one i) thiosulfate salt, preferably in combination with ii) Urea and urea derivatives.
- VOC volatile organic compounds
- aldehydes including formaldehyde
- VOC volatile organic compounds
- aldehydes including formaldehyde
- thiosulfate salt preferably in combination with ii) Urea and urea derivatives.
- the thiosulfate salt is those derived from sodium and ammonia.
- a further preferred embodiment relates to a composition (treating agent) of the abovementioned type in which at least one thiosulfate salt is used in combination with urea and / or urea derivative.
- wood materials obtainable according to the method of the invention.
- wood-based materials are characterized by a reduced emission of volatile organic compounds, in particular the aldehydes including formaldehyde.
- aldehydes including formaldehyde.
- These are in particular fibreboard, such as HDF or MDF, chipboard or OSB boards.
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Priority Applications (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP09008805.5A EP2272644B1 (fr) | 2009-07-06 | 2009-07-06 | Procédé destiné à la réduction de l'émission d'aldéhydes et de liaisons organiques volatiles à partir de matières dérivées du bois |
| PT121873855T PT2546039E (pt) | 2009-07-06 | 2009-07-06 | Processo para a redução da emissão de compostos orgânicos voláteis e de compostos aldeídicos a partir de painéis osb, uso de aditivos para este propósito bem como painéis osb |
| HUE09008805A HUE031829T2 (en) | 2009-07-06 | 2009-07-06 | A method for reducing emissions of aldehydes and volatile organic compounds in wood |
| ES12187385.5T ES2468024T3 (es) | 2009-07-06 | 2009-07-06 | Procedimiento para reducir la emisión de aldehídos y compuestos orgánicos volátiles de placas osb, utilización de aditivos para este fin y placa OSB |
| EP12187385.5A EP2546039B1 (fr) | 2009-07-06 | 2009-07-06 | Procédé destiné à la réduction d'émissions d'aldéhydes et de liaisons organiques volatiles de panneaux OSB, l'utilisation d'additifs à cet effet et panneau OSB |
| PT90088055T PT2272644T (pt) | 2009-07-06 | 2009-07-06 | Processo para a redução da emissão de compostos orgânicos voláteis e de compostos aldeídicos a partir de materiais à base de madeira |
| ES09008805.5T ES2611080T3 (es) | 2009-07-06 | 2009-07-06 | Procedimiento para reducir la emisión de aldehídos y compuestos orgánicos volátiles de materiales a base de madera |
| PL12187385T PL2546039T3 (pl) | 2009-07-06 | 2009-07-06 | Sposób redukcji emisji aldehydów i lotnych związków organicznych z płyt OSB, stosowanie substancji dodatkowych do realizacji tego celu i płyta OSB |
| PL09008805T PL2272644T3 (pl) | 2009-07-06 | 2009-07-06 | Zastosowanie dodatków do zmniejszania emisji aldehydów i lotnych związków organicznych z materiałów drzewnych |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP09008805.5A EP2272644B1 (fr) | 2009-07-06 | 2009-07-06 | Procédé destiné à la réduction de l'émission d'aldéhydes et de liaisons organiques volatiles à partir de matières dérivées du bois |
Related Child Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP12187385.5A Division EP2546039B1 (fr) | 2009-07-06 | 2009-07-06 | Procédé destiné à la réduction d'émissions d'aldéhydes et de liaisons organiques volatiles de panneaux OSB, l'utilisation d'additifs à cet effet et panneau OSB |
| EP12187385.5A Division-Into EP2546039B1 (fr) | 2009-07-06 | 2009-07-06 | Procédé destiné à la réduction d'émissions d'aldéhydes et de liaisons organiques volatiles de panneaux OSB, l'utilisation d'additifs à cet effet et panneau OSB |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2272644A1 true EP2272644A1 (fr) | 2011-01-12 |
| EP2272644B1 EP2272644B1 (fr) | 2016-10-19 |
Family
ID=41338621
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP09008805.5A Active EP2272644B1 (fr) | 2009-07-06 | 2009-07-06 | Procédé destiné à la réduction de l'émission d'aldéhydes et de liaisons organiques volatiles à partir de matières dérivées du bois |
| EP12187385.5A Active EP2546039B1 (fr) | 2009-07-06 | 2009-07-06 | Procédé destiné à la réduction d'émissions d'aldéhydes et de liaisons organiques volatiles de panneaux OSB, l'utilisation d'additifs à cet effet et panneau OSB |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP12187385.5A Active EP2546039B1 (fr) | 2009-07-06 | 2009-07-06 | Procédé destiné à la réduction d'émissions d'aldéhydes et de liaisons organiques volatiles de panneaux OSB, l'utilisation d'additifs à cet effet et panneau OSB |
Country Status (5)
| Country | Link |
|---|---|
| EP (2) | EP2272644B1 (fr) |
| ES (2) | ES2468024T3 (fr) |
| HU (1) | HUE031829T2 (fr) |
| PL (2) | PL2546039T3 (fr) |
| PT (2) | PT2546039E (fr) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102615690A (zh) * | 2012-04-12 | 2012-08-01 | 文安县天华密度板有限公司 | 氨气熏蒸木纤维生产环保型人造板的方法 |
| CN104136180A (zh) * | 2012-02-27 | 2014-11-05 | 木一株式会社 | 无公害芦苇合成木材及其制备方法 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008020642A1 (de) * | 2008-04-24 | 2009-10-29 | Kronotec Ag | Verfahren zur Herstellung von Holzwerkstoffen und Holzwerkstoffe |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001164235A (ja) * | 1999-09-30 | 2001-06-19 | Kyokutoo International:Kk | ホルムアルデヒド捕捉剤、木質板の処理方法及び木質板 |
| WO2002072323A1 (fr) | 2001-03-12 | 2002-09-19 | Akzo Nobel N.V. | Procede permettant de reduire les emissions de formaldehyde issues de produits dotes d'une couche chargee de formaldehyde |
| WO2006010192A1 (fr) * | 2004-07-27 | 2006-02-02 | Orica Australia Pty. Ltd. | Système pour fournir un substrat cellulosique reconstitué enduit de poudre |
| WO2007012350A1 (fr) | 2005-07-27 | 2007-02-01 | Kronospan Technical Company Ltd. | Procede pour produire des articles constitues de materiaux derives du bois a faible emission de composes chimiques |
| DE102007038041A1 (de) | 2007-08-10 | 2009-02-12 | Kronotec Ag | Verfahren zur Vermeidung der Emission von Aldehyden und flüchtigen organischen Verbindungen aus Holzwerkstoffen |
-
2009
- 2009-07-06 EP EP09008805.5A patent/EP2272644B1/fr active Active
- 2009-07-06 EP EP12187385.5A patent/EP2546039B1/fr active Active
- 2009-07-06 PL PL12187385T patent/PL2546039T3/pl unknown
- 2009-07-06 HU HUE09008805A patent/HUE031829T2/en unknown
- 2009-07-06 ES ES12187385.5T patent/ES2468024T3/es active Active
- 2009-07-06 ES ES09008805.5T patent/ES2611080T3/es active Active
- 2009-07-06 PT PT121873855T patent/PT2546039E/pt unknown
- 2009-07-06 PL PL09008805T patent/PL2272644T3/pl unknown
- 2009-07-06 PT PT90088055T patent/PT2272644T/pt unknown
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001164235A (ja) * | 1999-09-30 | 2001-06-19 | Kyokutoo International:Kk | ホルムアルデヒド捕捉剤、木質板の処理方法及び木質板 |
| WO2002072323A1 (fr) | 2001-03-12 | 2002-09-19 | Akzo Nobel N.V. | Procede permettant de reduire les emissions de formaldehyde issues de produits dotes d'une couche chargee de formaldehyde |
| WO2006010192A1 (fr) * | 2004-07-27 | 2006-02-02 | Orica Australia Pty. Ltd. | Système pour fournir un substrat cellulosique reconstitué enduit de poudre |
| WO2007012350A1 (fr) | 2005-07-27 | 2007-02-01 | Kronospan Technical Company Ltd. | Procede pour produire des articles constitues de materiaux derives du bois a faible emission de composes chimiques |
| DE102007038041A1 (de) | 2007-08-10 | 2009-02-12 | Kronotec Ag | Verfahren zur Vermeidung der Emission von Aldehyden und flüchtigen organischen Verbindungen aus Holzwerkstoffen |
| WO2009021702A1 (fr) | 2007-08-10 | 2009-02-19 | Kronotec Ag | Procédé de réduction des émissions d'aldéhydes et de composés organiques volatils à partir de matériaux dérivés du bois |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104136180A (zh) * | 2012-02-27 | 2014-11-05 | 木一株式会社 | 无公害芦苇合成木材及其制备方法 |
| CN104136180B (zh) * | 2012-02-27 | 2016-06-29 | 木一株式会社 | 无公害芦苇合成木材及其制备方法 |
| CN102615690A (zh) * | 2012-04-12 | 2012-08-01 | 文安县天华密度板有限公司 | 氨气熏蒸木纤维生产环保型人造板的方法 |
| CN102615690B (zh) * | 2012-04-12 | 2014-03-12 | 文安县天华密度板有限公司 | 氨气熏蒸木纤维生产环保型人造板的方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2546039B1 (fr) | 2014-03-26 |
| ES2611080T3 (es) | 2017-05-04 |
| PT2272644T (pt) | 2017-01-10 |
| PL2272644T3 (pl) | 2017-09-29 |
| HUE031829T2 (en) | 2017-08-28 |
| EP2272644B1 (fr) | 2016-10-19 |
| ES2468024T3 (es) | 2014-06-13 |
| EP2546039A2 (fr) | 2013-01-16 |
| PT2546039E (pt) | 2014-06-09 |
| EP2546039A3 (fr) | 2013-03-20 |
| PL2546039T3 (pl) | 2014-08-29 |
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