CN117245750A - Method for removing odor of salt-resistant sub-wood - Google Patents
Method for removing odor of salt-resistant sub-wood Download PDFInfo
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- CN117245750A CN117245750A CN202311271624.2A CN202311271624A CN117245750A CN 117245750 A CN117245750 A CN 117245750A CN 202311271624 A CN202311271624 A CN 202311271624A CN 117245750 A CN117245750 A CN 117245750A
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- 238000000034 method Methods 0.000 title claims abstract description 36
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- 238000002791 soaking Methods 0.000 claims abstract description 16
- 239000004094 surface-active agent Substances 0.000 claims abstract description 16
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- 238000005406 washing Methods 0.000 claims abstract description 4
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- 238000007598 dipping method Methods 0.000 claims description 4
- QXNVGIXVLWOKEQ-UHFFFAOYSA-N Disodium Chemical group [Na][Na] QXNVGIXVLWOKEQ-UHFFFAOYSA-N 0.000 claims description 3
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- PGNRLPTYNKQQDY-UHFFFAOYSA-N 2,3-dihydroxyindole Chemical compound C1=CC=C2C(O)=C(O)NC2=C1 PGNRLPTYNKQQDY-UHFFFAOYSA-N 0.000 description 2
- ICKWICRCANNIBI-UHFFFAOYSA-N 2,4-di-tert-butylphenol Chemical compound CC(C)(C)C1=CC=C(O)C(C(C)(C)C)=C1 ICKWICRCANNIBI-UHFFFAOYSA-N 0.000 description 2
- YIWUKEYIRIRTPP-UHFFFAOYSA-N 2-ethylhexan-1-ol Chemical compound CCCCC(CC)CO YIWUKEYIRIRTPP-UHFFFAOYSA-N 0.000 description 2
- PVIMSPYDDGDCTG-UHFFFAOYSA-N 2-formylphenylformamide Chemical compound O=CNC1=CC=CC=C1C=O PVIMSPYDDGDCTG-UHFFFAOYSA-N 0.000 description 2
- ONYNOPPOVKYGRS-UHFFFAOYSA-N 6-methyl-1h-indole Chemical compound CC1=CC=C2C=CNC2=C1 ONYNOPPOVKYGRS-UHFFFAOYSA-N 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical class S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 241000750718 Pterocarpus santalinus Species 0.000 description 2
- KAESVJOAVNADME-UHFFFAOYSA-N Pyrrole Chemical compound C=1C=CNC=1 KAESVJOAVNADME-UHFFFAOYSA-N 0.000 description 2
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- 230000009471 action Effects 0.000 description 2
- IRAQOCYXUMOFCW-OSFYFWSMSA-N cedr-8-ene Chemical compound C1[C@]23[C@H](C)CC[C@H]3C(C)(C)[C@@H]1C(C)=CC2 IRAQOCYXUMOFCW-OSFYFWSMSA-N 0.000 description 2
- 210000002421 cell wall Anatomy 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
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- XIRNKXNNONJFQO-UHFFFAOYSA-N ethyl hexadecanoate Chemical compound CCCCCCCCCCCCCCCC(=O)OCC XIRNKXNNONJFQO-UHFFFAOYSA-N 0.000 description 2
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- KGWPHCDTOLQQEP-UHFFFAOYSA-N 7-methylindole Chemical compound CC1=CC=CC2=C1NC=C2 KGWPHCDTOLQQEP-UHFFFAOYSA-N 0.000 description 1
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- 244000046052 Phaseolus vulgaris Species 0.000 description 1
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- 244000086363 Pterocarpus indicus Species 0.000 description 1
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- IRAQOCYXUMOFCW-UHFFFAOYSA-N di-epi-alpha-cedrene Natural products C1C23C(C)CCC3C(C)(C)C1C(C)=CC2 IRAQOCYXUMOFCW-UHFFFAOYSA-N 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
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- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 229940067592 ethyl palmitate Drugs 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- DYDNPESBYVVLBO-UHFFFAOYSA-N formanilide Chemical compound O=CNC1=CC=CC=C1 DYDNPESBYVVLBO-UHFFFAOYSA-N 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- -1 gums Substances 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 150000002475 indoles Chemical class 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
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- 235000021110 pickles Nutrition 0.000 description 1
- 239000000047 product Substances 0.000 description 1
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- 241000894007 species Species 0.000 description 1
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- 239000008107 starch Substances 0.000 description 1
- BUUPQKDIAURBJP-UHFFFAOYSA-N sulfinic acid Chemical compound OS=O BUUPQKDIAURBJP-UHFFFAOYSA-N 0.000 description 1
- 150000003455 sulfinic acids Chemical class 0.000 description 1
- 150000003871 sulfonates Chemical class 0.000 description 1
- 150000003460 sulfonic acids Chemical class 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 210000004243 sweat Anatomy 0.000 description 1
- 229920001864 tannin Polymers 0.000 description 1
- 239000001648 tannin Substances 0.000 description 1
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- 235000019640 taste Nutrition 0.000 description 1
- ZJCZFAAXZODMQT-UHFFFAOYSA-N tert-hexadecanethiol Natural products CCCCCCCCCCCCCC(C)(C)S ZJCZFAAXZODMQT-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- 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
Abstract
The invention belongs to the technical field of wood processing, and particularly relates to a method for removing odor of salt-resistant sub-wood picking wood, which comprises the following steps: preparing hydrogen peroxide impregnating solution, wherein the hydrogen peroxide impregnating solution comprises hydrogen peroxide solution with the volume concentration of 5% -12%, surfactant and water; immersing the salt-resistant sub-wood in hydrogen peroxide impregnating solution for 2-3 days; taking out the salt-resistant picked wood after finishing the preset soaking time, and washing and soaking the salt-resistant picked wood for 1-2 days by using clear water; placing the salt-resistant plucked wood subjected to water washing and soaking in the atmosphere to enable the salt-resistant plucked wood to reach an air-drying state; the method can remove the odor of the salt-resistant sub-wood, and simultaneously does not change the original gloss of the wood, thereby effectively solving the problem that the salt-resistant sub-wood is difficult to use and expanding the source channel of the wood.
Description
Technical Field
The invention relates to the technical field of wood processing, in particular to a method for removing odor of salt-resistant sub-picked wood.
Background
Wood itself releases specific volatile organics, which form its unique odor. Volatile Organic Compounds (VOCs) produced by wood are a class of organic compounds of many kinds and of complex composition, which are distinguished from different organizations and have a variety of definitions. It is accepted that the world health organization (World Health Organization, WTO) defines VOC, and volatile organic compounds refer to those compounds that have a boiling point between 50 ℃ and 260 ℃ and a saturated vapor pressure exceeding 133.322Pa at room temperature and that are present in the air in vapor form at room temperature. Some of the VOCs released from wood are formed during the growth of wood, and some are later regenerated by a series of chemical reactions of the internal components of wood. In summary, these VOCs may originate from volatile organics, tannins, resins, gums, or products of wood formation by fungi invading the trunk, formed in the normal growth process of trees, that are present in the cell cavities, as well as starch, other carbohydrates in the wood, metabolized or degraded by microorganisms. Wood odor can affect a person's mood, cognition, and physical health. Some wood can produce aromatic odors. For example, the Daguo pterocarpus santalinus can emit intense fruit fragrance, the fragrance of the new section is more obvious, the fragrance is far and mellow and not rising, and the rosewood pterocarpus santalinus has light fragrance, faint fragrance and the like. However, some tropical woods often have unpleasant, unpleasant tastes, such as adenoma beans, pilocarpus trees, and certain quassia from africa. More than 40 species of quassia were found, and some quassia produced in africa were found to be malodorous, such as salt-resistant quassia. Salt-resistant plucked wood is mainly distributed in western and middle non-regions, is a famous tropical wood, and has good wood corrosion resistance and termite resistance; the gloss of the wood is strong; texture is slightly staggered; the structure is thin and uniform; the wood is heavy, and the strength and the hardness are high; the processing performance is good; the teak substitute is suitable for advanced furniture, sliced veneers, wood stairs, cabinets, floors, jointers, vehicles, shipbuilding and the like, and is an excellent teak substitute. However, the new cut wood of the salt-resistant sub-wood has bad smell, so that people are often intolerable in the processing process, even allergic phenomenon occurs, and the wide application of the new cut wood is limited. The wood has bad smell, but has excellent mechanical properties, is suitable for places with high durability and strength, can relieve huge pressure faced by forest resources in China if being widely processed and utilized, and is beneficial to solving the problem of lack of large-diameter forest resources in China.
At present, the odor generation cause and the removal method of the salt-resistant sub-wood are not researched, so that the salt-resistant sub-wood is accumulated and cannot be widely used. Therefore, there is a need for a deodorizing method of salt-resistant sub-wood, which provides a prerequisite for the wide use of salt-resistant sub-wood.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a method for removing the odor of salt-resistant sub-wood, which can effectively remove the odor of salt-resistant sub-wood and make the odor widely used.
In order to solve the technical problems, the invention adopts the following technical scheme:
a method of removing odor from salt-resistant sub-wood comprising the steps of:
preparing hydrogen peroxide impregnating solution for later use;
step two, dipping the salt-resistant sub-wood in the hydrogen peroxide dipping solution;
step three, taking out the salt-resistant picked wood subjected to the preset soaking time, washing with clear water and soaking in clear water;
and step four, taking out the salt-resistant picked wood subjected to the preset soaking time and placing the salt-resistant picked wood in the atmosphere to enable the salt-resistant picked wood to reach an air-drying state.
The hydrogen peroxide impregnating solution further comprises the following components: hydrogen peroxide solution with volume concentration of 5-12%, surfactant and water.
In a further scheme, the 5% -12% hydrogen peroxide solution is prepared by mixing 12.5-25 ml of water with each 5ml of 30% hydrogen peroxide solution.
Further, the volume ratio of the 5% -12% hydrogen peroxide solution, the surfactant and the water is (3-4): 1-2): 6-4.
Still further, the surfactant is disodium cocoate monoethanolamide sulfosuccinate (DMSS).
Further, the preset soaking time is 2-4 days.
Further, the preset soaking time is 1-2 days.
Further, the temperature of the hydrogen peroxide impregnating solution is 25-40 ℃.
A method of ascertaining the composition of volatile organic compounds produced in salt resistant deliberate wood, the method comprising the steps of:
scraping the surface layer of the salt-resistant sub-wood by a knife, and grinding the internal wood into 40-60 meshes of wood powder;
and step two, detecting the wood powder obtained in the step one by utilizing a solid-phase microextraction gas chromatography-mass spectrometry technology.
And (3) loading conditions: split-flow sample injection; injector temperature: 250 ℃; carrier gas: high purity helium gas; column flow rate: 0.5mL/min; programming temperature: the initial temperature is 90 ℃, kept for 1min, and heated to 280 ℃ at 10 ℃/min, and kept for 15min; linear velocity control mode, linear velocity: 35cm/s; interface temperature: 250 ℃; an electron bombardment ion (EI) source, the electron bombardment energy being 70eV; ion source temperature: 230 ℃; mass scan range: mass-to-charge ratio (m/z) =50 to 500; solvent delay time: 2.5min.
Detection result: the volatile matters in the wood powder comprise volatile matters with pleasant smell: 2-ethylhexanol, any aldehyde, alpha-cedrene, 2, 4-di-tert-butylphenol, ethyl palmitate, ethyl isopholate; also included are the unpleasant odor volatile materials tert-hexadecanethiol, 6-methylindole and 7-methylindole, since the main source of odor is known by measurement, targeted deodorization can be performed. Thiols are a class of non-aromatic compounds containing thiol functional groups (-SH) that are readily oxidized, hydrogen peroxide can oxidize thiols to sulfinic acid or sulfonates, so that the odor is substantially eliminated after treatment; indole is a compound of pyrrole and benzene in parallel, has strong fecal odor when the indole is concentrated, has strong and durable diffusion force, and the highly diluted solution has fragrance, and can be used as perfume. Indole can undergo a di-polymerization reaction and a tri-polymerization reaction under the action of strong acid, so that the smell of the indole is removed, but the strong acid is corrosive, so that the strong acid can corrode wood, and the utilization rate of the wood is reduced, such as hydrochloric acid; indole can also be oxidized to 2, 3-dihydroxyindole under the action of hydrogen peroxide, and then to N- (2-formylphenyl) formamide.
The 5% to 12% dilute hydrogen peroxide used in the present invention oxidizes mercaptans to labile disulfides, which are in excess during processing, and the labile disulfides continue to oxidize to sulfonic and sulfinic acids, thereby removing the mercaptans. Meanwhile, hydrogen peroxide can oxidize indole to 2, 3-dihydroxyindole, and then to N- (2-formylphenyl) formamide. Finally oxidized into formanilide, thereby removing indole.
The surfactant used in the invention is helpful for hydrogen peroxide in the hydrogen peroxide impregnating solution to permeate into cells of wood, fully react with thiol and indole which generate volatile odor in the cells, and enhance the deodorizing effect.
In summary, the working principle of the hydrogen peroxide impregnating solution is that the penetration and dispersion effects of the surfactant are utilized to assist the hydrogen peroxide in the impregnating solution to penetrate into the cell walls of the salt-resistant sub-wood, so that the thiol and indole in the content are oxidized, and the technical effect of removing the odor of the salt-resistant sub-wood is achieved.
Advantageous effects
According to the treatment method for deodorizing the salt-resistant sub-wood, provided by the technical scheme, the volatile substances generating odor inside the salt-resistant sub-wood can be removed.
The method utilizes the permeability and the dispersibility of the surfactant to assist the penetration of the hydrogen peroxide into the salt-resistant metawood and into the cell wall to oxidize the mercaptan and indole in the cells.
The treatment method is not damaged, and can keep the salt-resistant sub-wood picking wood for a long time without special smell and harmful gas volatilization; meanwhile, the hydrogen peroxide adopted by the invention is the diluted hydrogen peroxide solution, and the surfactant used is disodium cocoanut monoethanolamide sulfosuccinate (DMSS), so that the cost is low, the sources are wide, the process conditions are simple, and the method is easy to realize.
Drawings
FIG. 1 is a graph showing the results of solid phase microextraction gas chromatography-mass spectrometry (STMS) technique applied to the surface of salt-resistant sub-wood.
Detailed Description
In order that the objects and advantages of the invention will become more apparent, a detailed description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. It should be understood that the following text is intended to describe only one or more specific embodiments of the invention and does not limit the scope of the invention strictly as claimed.
The processing object of the present embodiment: salt-resistant wood is picked.
As shown in figure 1, in order to effectively remove the odor of the salt-resistant sub-wood, the solid phase microextraction gas chromatography-mass spectrometry technology is applied to detect the wood powder of the salt-resistant sub-wood, and the substances which cause the salt-resistant sub-wood to have the odor are mercaptan and indole.
Example 1, a deodorizing process was performed with both thiol and indole compounds.
The specific process steps are as follows:
s1, preparing a sample:
a) Diluting 30% hydrogen peroxide solution sold in the market into 5% hydrogen peroxide solution for standby;
b) Adding 5.4L of 5% hydrogen peroxide solution, 1.8L of surfactant and 10.8L of water into a container, and uniformly stirring at normal temperature for later use;
c) The salt-resistant wood veneer was cut into 60cm×30cm×6cm (t×r×l, where T represents the chord direction, R represents the radial direction, and L represents the longitudinal direction) samples with a saw machine.
S2, sample impregnation: the salt-resistant sub-wood picking sample is placed in a container containing impregnating solution, the impregnating temperature is 25 ℃, and the impregnating time is 2 days.
S3, cleaning a sample: pouring out the hydrogen peroxide impregnating solution in the container, flushing the container with tap water for three times, adding tap water for soaking, taking out the container after 24 hours, transferring the container to a cool and ventilated place, and placing the container until the container is air-dried.
Example 2
The processing object of the present embodiment: salt-resistant wood is picked.
The specific process steps are as follows:
s1, preparing a sample:
a) Diluting 30% hydrogen peroxide solution sold in the market into 7% hydrogen peroxide solution for standby;
b) Adding 8L of 7% hydrogen peroxide solution, 4L of surfactant and 8L of water into a container, and uniformly stirring at normal temperature for later use;
c) The salt-resistant wood veneer was cut into 60cm×40cm×8cm (t×r×l, where T represents the chord direction, R represents the radial direction, and L represents the longitudinal direction) samples with a saw machine.
S2, sample impregnation: the salt-resistant wood sawing material is put into a container with impregnating solution, the impregnating temperature is 30 ℃, and the impregnating time is 2 days.
S3, cleaning a sample: pouring out the hydrogen peroxide impregnating solution in the container, flushing the container with tap water for several times, adding tap water for soaking, taking out the container after 24 hours, transferring the container to a cool and ventilated place, and placing the container until the container is air-dried.
Example 3
The processing object of the present embodiment: salt-resistant wood is picked.
The specific process steps are as follows:
s1, preparing a sample:
a) Diluting 30% hydrogen peroxide solution sold in the market into 10% hydrogen peroxide solution for standby;
b) 7 liters of 10% hydrogen peroxide solution, 3 liters of surfactant and 5 liters of water are added into a container and stirred uniformly at normal temperature for standby;
c) The salt-resistant wood veneer was cut into 80cm×45cm×9cm (t×r×l, where T represents the chord direction, R represents the radial direction, and L represents the longitudinal direction) samples with a saw machine.
S2, sample impregnation: the salt-resistant wood samples were placed in a container containing impregnating solution at 45℃for 2 days.
S3, cleaning a sample: pouring out the hydrogen peroxide impregnating solution in the container, flushing the container with tap water for several times, adding tap water for soaking, taking out the container after 24 hours, transferring the container to a cool and ventilated place, and placing the container until the container is air-dried.
The odor grade of the salt-resistant sub-wood-picking wood subjected to deodorization treatment in the above example is evaluated according to GB/T10220-2012 general theory of sensory analysis methods, and the specific methods and standards are as follows: the deodorized wood pickles were subjected to odor assessment by an odor measurement group consisting of 5 odor-distinguished persons. The sniffer is 18-45 years old, does not smoke, does not drink, cannot apply cosmetics, cannot have rhinitis, and cannot wear leather shoes which have just been coated with shoe polish. In addition, the olfactory organ is free from diseases, the olfactory detection is qualified, and five single smells of floral, sweat, sweet rice crust, mature fruit and fecal smells can be distinguished through special environmental protection training, so that related work of environmental protection departments is performed. Odor grade criteria: 0: no odor; 1: slightly perceivable smell (detection threshold); 2: a weak smell (cognitive threshold) that can know what smell is; 3: smell that can be easily perceived; 4: stronger odor; 5: strong smell. The odor rating of each sample was assessed by 5 sniffers and averaged. The evaluation results are shown in Table 1. The color of the example is measured by using a colorimeter, and from the result, after the salt-resistant sub-wood is subjected to deodorization treatment, the L, a and b change slightly, which shows that the color of the salt-resistant sub-wood is not changed greatly after the salt-resistant sub-wood is subjected to deodorization treatment; all three examples had Δe values less than 3, indicating that the color change was not noticeable to the naked eye.
TABLE 1 Table of odor ratings and color changes of salt-resistant sub-wood-plucked wood
In the process of the embodiment of the invention, the hydrogen peroxide can oxidize volatile organic compounds, namely mercaptan and indole which generate odor in the salt-resistant sub-wood, and the surfactant helps the impregnating solution to permeate into the wood, so that the damage of the hydrogen peroxide to change the color of the wood while removing the odor of the wood is avoided. The treatment method realizes the effect of removing the odor of the salt-resistant sub-wood while keeping the color of the wood unchanged basically at lower cost; the influence on macroscopic and microscopic morphology of the salt-resistant sub-wood is small, and odor gas is not released when the deodorizing treatment is carried out and the deodorizing treatment is stored; the odor removing effect is ensured, meanwhile, the color and the appearance of the picked sub-wood are not damaged, and the subsequent treatment is not needed.
The invention utilizes the oxidizing property of hydrogen peroxide to oxidize the thiol and indole which generate odor in the salt-resistant sub-wood, so as to eliminate the odor, and simultaneously does not change the color and macroscopic and microscopic morphology of the salt-resistant sub-wood. The DMSS surfactant is added to enable hydrogen peroxide to enter the interior of the salt-resistant plucked wood to the greatest extent, so that the reaction is promoted; meanwhile, the process has the advantages of simple equipment, fewer steps, lower cost and high feasibility.
While the embodiments of the present invention have been described in detail with reference to the examples, the present invention is not limited to the above embodiments, and it will be apparent to those skilled in the art that various equivalent changes and substitutions can be made therein without departing from the principles of the present invention, and such equivalent changes and substitutions should also be considered to be within the scope of the present invention.
Claims (8)
1. A method for removing odor of salt-resistant sub-wood, which is characterized in that: the method comprises the following steps:
preparing hydrogen peroxide impregnating solution for later use;
step two, dipping the salt-resistant sub-wood in the hydrogen peroxide dipping solution;
step three, taking out the salt-resistant picked wood subjected to the preset soaking time, washing with clear water and soaking in clear water;
and step four, taking out the salt-resistant picked wood subjected to the preset soaking time and placing the salt-resistant picked wood in the atmosphere to enable the salt-resistant picked wood to reach an air-drying state.
2. A method of removing odor from salt-resistant sub-wood according to claim 1, wherein: the hydrogen peroxide impregnating solution comprises the following components: hydrogen peroxide solution with volume concentration of 5-12%, surfactant and water.
3. A method of removing odor from salt-resistant sub-wood according to claim 2, wherein: the 5% -12% hydrogen peroxide solution is prepared by mixing 12.5-25 ml of water with each 5ml of 30% hydrogen peroxide solution.
4. A method of removing odor from salt-resistant sub-wood according to claim 2, wherein: the volume ratio of the 5% -12% hydrogen peroxide solution, the surfactant and the water is (3-4): (1-2): (6-4).
5. A method of removing odor from salt-resistant sub-wood according to claim 2 or 4, characterized by: the surfactant is disodium cocoate monoethanolamide sulfosuccinate monoester (DMSS).
6. A method of removing odor from salt-resistant sub-wood according to claim 1, wherein: the preset soaking time is 2-4 days.
7. A method of removing odor from salt-resistant sub-wood according to claim 1, wherein: the preset soaking time is 1-2 days.
8. A method for removing odor from salt-resistant sub-wood according to claim 1 or 2, characterized by: the temperature of the hydrogen peroxide impregnating solution is 25-40 ℃.
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| CN202311271624.2A CN117245750A (en) | 2023-09-27 | 2023-09-27 | Method for removing odor of salt-resistant sub-wood |
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| CN202311271624.2A CN117245750A (en) | 2023-09-27 | 2023-09-27 | Method for removing odor of salt-resistant sub-wood |
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