Means for biosecurity of cellulose-containing materials
(57) Abstract:The invention relates to means for biochemical protection of cellulose-containing materials from blue stain fungi and mildew and can be used in sawmills and woodworking industry. As bioprotectant funds proposed to use alkylbenzenesulfonic structural formula
n The invention relates to an organic origin, which are used for biochemical protection of cellulose-containing materials from blue stain fungi and mold wood during atmospheric drying or transportation with humidity above transport, and can be used in sawmills and woodworking industries.Known means of an organic origin for wood protection in the form of pentachlorophenol sodium (PFN) .This tool has the following disadvantages:
- has low penetrating power; it is adsorbed at a depth of 0.5 mm, and thus does not destroy the fungi that penetrate deeply into the wood;
- requires the use of special and individual protective means, because it is toxic for people and the environment (against the tion.Also known means of organic origin, which has bioprotectant property with respect to cellulose-containing materials, in the form of 4,5,6-trichloroanisole .This tool has a wide range of actions, but belongs to the category of very toxic substances; concentrated solutions of this tool, in contact with skin causes severe burns, dilation of blood capillaries and smooth muscle contraction. Use this connection in a very limited way.The closest analogue to the described invention and accepted by the applicant as a prototype, is a famous tool of organic origin on the basis of Quaternary ammonium compounds and amines, in particular alkyldimethylbenzylammonium having the structural formula
< / BR>where R is a saturated hydrocarbon radical of normal structure containing 10-18 carbon atoms .The substance of the prototype refers to surface-active substances (surfactants) and get it by condensation alkyldiphenylamine and benzylchloride. Alkyldimethylbenzylammonium able to adsorb from aqueous solutions on the surface of separation of the phases (solid - liquid) ilen structure, includes polar functional hydrophilic group and a nonpolar hydrocarbon radicals.A disadvantage of the known tool is that it has a low permeability of the wood capillaries (molecular solubility it is small and the surface tension of the aqueous solution is relatively high). Preservation of samples of softwood and hardwood sapwood part against derevookrashivayuschie and fungi after exposure to 50 days is not higher than 70%. This tool shows mainly bacteriostatic action; delay the development or reproduction of microbes. Connection-toxic, refers to the substance of the second hazard class (aqueous solutions it have skin irritation and severe skin-resorptive effect, causing dermatitis).Features connection for biosecurity of cellulose-containing materials, which are soluble in water and has simultaneously bactericidal and fungicidal properties against derevookrashivayuschie and wood-destroying fungi blue stain and mould. Its activity is not reduced in time, it is less safe for humans and the environment than the tool prototype. The proposed connection is Manihari, having the structural formula
< / BR>Technology industrial synthesis of the proposed tools for biosecurity of cellulose-containing materials includes condensation of the alkylamine and benzyl chloride. The process goes through the following reactions:
< / BR>Along with the main reaction have side
< / BR>Process conditions: temperature of 140-150oC, a pressure of about 1.6 MPa, a molar ratio of amine to ClCH2C6H5is 3:1 and the duration of reaction 3-4 hoursThe final product is a mass in the form of a clear solution, which on cooling to 20oC was turned into a pasty mass from yellow to reddish in color.In the production process of alkylbenzenesulfonic the loss is not more than 0.3%.Identification of industrial designs proposed connection carried out by the method of infrared spectroscopy instrument Perkin Elmer 1720 by well-known methods.The spectrum suggests the presence of an amine salt, as evidenced by the presence of bands of stretching vibrations of the ammonium group in the area of the absorption bands 2800-2200 cm-1and the deformation vibration bands in the area 1642 cm-1.On spectramedi spectrum data allow to conclude that, the formula proposed bioprotectant means for cellulose-containing material
< / BR>according to the final product of the synthesis.Alkylbenzenesulfonic has the following quality indicators:
The aggregate state is homogeneous pasty mass from yellow to a reddish color, and, at the 50oC turns into a liquid.The content of basic substance, %, not less - 48-50
Molecular weight of 346-376
The density of the solution, g/cm3- 0,96-0,97
Viscosity, SP, at 20oC - 140-150
the pH of the aqueous solution - 6,6-7,0
The content of impurities resins, %, not less than - 3
The content of the hydrochloric salt of the secondary amine, no more than 1.2 to 1.5
The contents of a simple ester, %, not more than - 3
The content of the tertiary amine,% max 0.5
The critical concentration of micelle formation - 0,065
The iron content of not more than 0,001
Surface tension, Dyne/cm 32-35
Foaming ability in Ross-miles, mm - 200
Refractive index - 1,429-1,431
The auto-ignition temperature,oC - 356
FlashoC - 95
Toxicity LD50for white mice, mg/kg wet weight - 350
The proposed solution has the following properties:
- by reducing the surface tension of an aqueous solution permeability of wood is increased to 3 microns;
- bioprotective means less viscous than the well-known, well-soluble in water, has bactericidal and fungicidal action, and these properties do not change in time (activity steps on the wood stored up to 90 days with protection up to 98%);
means environmentally friendly, less toxic to humans than famous;
- applies to 2-hazard class;
- wood after treatment is not painted;
- physico-chemical properties of wood in time does not change and it is easily treated.Bioprotective action of alkylbenzenesulfonic wood was studied as follows.The tests were carried out in the laboratory on samples from the sapwood of pines.Samples with a humidity of 80 - 120% and size HH (last dimension along the fiber length) was treated with (dipping method) impregnating the solution for 30 sAs a solvent used distilled water.Samples treated bioprotectant medium spans the P CLASS="ptx2">Infection of the samples was carried out by the method of dipping in a suspension of spores of the fungi grown in test tubes on wort-agar medium.The samples were processed bioprotectant means and infected spore suspension with endurance in her 30 C. Then the sample is dried to their original moisture 80-120%, put in sterilized containers that have supported the moisture content at the primary level. On the 10th, 20th, 30th, 40th and 50th day conduct visual inspection and estimate the fouling of the surface samples derevookrashivayuschie and mold fungi in percent of the total area. In addition, the estimated distribution of bioprotectant tools section of the wood after impregnation.It is revealed that the tool penetrates the sample to a depth of more than 5 mm, depending on the conditions of impregnation, and the distribution of its diffusion.As control samples, the latter was impregnated by means of the prototype. The result is that the performance security of the sample surface through various much higher when the impregnation of the proposed tool than with the known impregnation (the prototype) under equal conditions studies.Alkylenediamine is, the.E. can be used as a component of complex structures for the protection of cellulose-containing materials. The proposed tool is an effective and promising bio-protective compound against blue stain fungi and mold cellulose-containing materials. Alkylbenzenesulfonic structural formula
< / BR>as biocidal protection of cellulose-containing materials from defeat them derevookrashivayuschie and mold fungi.
FIELD: petroleum products and antiseptic materials.
SUBSTANCE: invention is directed to protection against damage caused by fungi and bacteria, in particular to impregnation of wooden crossties and rods. Antiseptic of invention contains, as long fraction of thermal cracking, fraction of heavy pyrolysis tar boiling off within a range of 200°C to end boiling point in amount 70-95 wt % and, as color regulator, mazut fraction boiling off within a range of 220°C to end boiling point in amount 5-30 wt %.
EFFECT: expanded reserve of oily wood-impregnation antiseptics and improved color thereof thanks to optimal proportions of distillate and residual petroleum fractions.
FIELD: building materials industry; production and application of the furan polymeric compound permeated timber-based materials.
SUBSTANCE: the invention is pertaining to the field of building materials industry, mainly, to production and application of the furan polymeric compound permeated timber-based materials. The
offered timber-based material is permeated with the solution of the polymerized monomer of the furfural alcohol consisting of the furfuryl alcohol and one additional compound dissolved directly in the indicated furfuryl alcohol to produce the treating solution. At that the indicated additional compound is chosen from the maleic anhydride and the phthalic anhydride. The invention also presents the method of production of the timber-based material permeated with the furan polymeric compound and the way of its application. The technical result of the invention ensures, that the timber-based material permeated with the furan polymeric compound is homogeneous in color and density in the whole treated zone.
EFFECT: the invention ensures, that the produced timber-based material permeated with the furan polymeric compound is homogeneous in color and density in the whole treated zone.
8 cl, 1 tbl, 1 ex
FIELD: wood-working industry.
SUBSTANCE: described is the wood impregnated with furan polymer obtained by impregnation of wood with solution of polymerized monomer of furfural alcohol containing water, stabilizers in the form of borax and sodium salts of lignosulfone acids, furfural alcohol and at least one additional compound selected from maleic anhydride, phthalic anhydride, maleic acid, phthalic acid and their combinations. Described also is the method of wood treatment by single-stage impregnation with a solution of polymerized monomer of furfural alcohol, subsequent hardening at a temperature of 70-140C providing drying in an oven.
EFFECT: enhanced stability of dimensions in the conditions of varying moisture content, enhanced hardness and resistance to putrefaction.
11 cl, 5 tbl
FIELD: impregnating materials.
SUBSTANCE: invention relates to production of antiseptic impregnating compositions used to protect wood against biodegradation, especially to protect wooden ties and timber. Petroleum-origin antiseptic, commercial preservative liquid, is described containing in variable proportions oily fractions based on light and/or heavy gas oils obtained in secondary processes of petroleum feedstock processing such as catalytic cracking of vacuum gas oil or mixed feedstock, thermal cracking of distillate feedstock including catalytic cracking heavy gas oil blended with lube oil production extracts, straight-run atmospheric and vacuum gas oils, bottom residues (mazuts, goudrons, long residuum, cracking residues) playing role of color and freezing temperature regulators, as well as spent motor oil, extracts from oil selective treatment processes, phenol-free resin from phenol-acetone production process, ethylbenzene resin from ethylbenzene production process, heavy tar from pyrolysis process, and also biocidal nitrogen-containing admixtures: 8-hydroxyquinoline, 5,7-dibromohydroxyquinoline, p-nitrosodimethylaniline, 1,2- and 1,4-naphthoquinones, 2,3-dichloronaphthoquinone, xanthogenate-based additive "LZ-23K", and sulfonate agents, al used at variable proportions.
EFFECT: enlarged resource for oily antiseptics for impregnation of wood due to use various-type petroleum products and enabled variation in viscosity, freezing temperature, and flash points.
17 cl, 40 ex
FIELD: wood working.
SUBSTANCE: antiseptic comprises oil fractions of thermo-catalytic gas oil and directly distilled gas oil.
EFFECT: improved quality of impregnation.
1 tbl, 5 ex
FIELD: wood materials.
SUBSTANCE: invention relates to a method for protection of wood providing to confer its hydrophobic properties for enhancing its longevity and stability of sizes. Invention describes a method for chemical treatment of lignocellulose materials, in particular, a wood lump. Indicated material is impregnated with a chemical agent containing hydrocarbon chains and this agent is chosen from mixed anhydrides containing the first hydrocarbon chain R and the second hydrocarbon chain R1 wherein R or R1 represents (C2-C4)-carboxylic acid, and R1 and R represents saturated or unsaturated (C6-C24)-fatty acid with exception mixed anhydride of acetic/benzoic acid. Indicated agent is useful for carrying out grafting based on a covalent bond in a great number of hydrocarbon chains with indicated materials. Grafting is carried out by the esterification reaction of indicated lignocellulose materials using a chemical agent chosen from organic anhydrides. Impregnation is carried out in the presence of a basic, neutral or weak acid catalyst and in the absence of catalyst also by immersion and irrigation in autoclave. Treatment is carried out at temperature from room value to 150°C but preferably from 100°C to 140°C. Also, invention describes an article based on lignocellulose fibers material, in particular, wood lump prepared by above described method. Proposed method provides preparing lignocellulose material, in particular, a wood lump with uniform fibers and smooth shape showing the absorption coefficient 3.5% and the swelling coefficient 3.5%.
EFFECT: improved method of treatment.
16 cl, 3 dwg, 3 tbl, 2 ex
FIELD: impregnation of wood.
SUBSTANCE: the suggested wood should be obtained due to impregnating wood with the mixture based upon polymerized monomer of furfuryl alcohol that contains, at least, water, furfuryl alcohol, a stabilizing additional solvent chosen out of acetone or alcohol at low boiling point such as methanol, ethanol or isopropanol and their combinations, and an initiator chosen out of maleic anhydride, phthalic anhydride, maleic acid, malic acid, phthalic acid, benzoic acid, citric acid, zinc chloride, aluminum chloride, other cyclic organic anhydrides and acids and their combinations. It has been, also, described the method for obtaining the wood impregnated with furan polymer due to a single-stage impregnation of wood with the mixture based upon polymerized monomer of furfuryl alcohol followed by hardening stage. The suggested wood is of high stability of sizes under conditions of altering moisture and increased resistance to rotting.
EFFECT: higher efficiency.
8 cl, 5 tbl
FIELD: impregnation of wood.
SUBSTANCE: the suggested wood should be obtained due to impregnating wood with the mixture based upon polymerized monomer of furfuryl alcohol that contains, at least, water, furfuryl alcohol, a stabilizer and an initiator, moreover, the stabilizer should be chosen out of sodium carbonate, sodium bicarbonate, sodium citrate, phosphates and water-soluble derivatives of lignin such as calcium and ammonium salts of ligninsulfonic acids, moreover, the mixture additionally contains the initiator chosen out of maleic anhydride, phthalic anhydride, maleic acid, malic acid, phthalic acid, benzoic acid, malonic acid, ascorbic acid, citric acid, zinc chloride, aluminum chloride, other cyclic organic anhydrides and acids and their combinations, at pH ranged 2.5-4.0. It has been, also, described the method for obtaining the wood impregnated with furan polymer due to impregnating the wood with the mixture based upon polymerized monomer of furfuryl alcohol followed by hardening at different temperature modes. The suggested wood is of high stability of sizes under conditions of altering moisture and increased resistance to rotting.
EFFECT: higher efficiency.
7 cl, 2 tbl
FIELD: chemical industry; production of the petroleum antiseptic used for the wood impregnation with the aromatic solvent.
SUBSTANCE: the invention is pertaining to the chemical industry, in particular, to production of the petroleum antiseptic compounds used for the preservative impregnation of the wood against the biodamage, especially for the antiseptic impregnation of the wooden sleepers and beams. The invention presents the petroleum antiseptic with the aromatic solvent used for impregnation of the wood, containing the unctuous fractions of the thermocatalytic gas oil and the aromatic solvent. In the capacity of the unctuous fractions of the thermocatalytic gas-oil it contains the mixture of the unctuous fractions of the heavy gas-oil of the catalytic cracking boiling within the limits of 300-450°С - 50-90 mass % and the unctuous fractions of the heavy gas-oil of the thermal cracking, boiling within the limits of 200-400°С - 10-50 mass %; and in the capacity of the aromatic solvent it contains the concentrate of the aromatic hydrocarbons C9 - C11 produced in the process of the selective extraction of the catalysate formed after the catalytic reforming of the benzine taken in the ratio of 70-95 mass % of the indicated mixture of the heavy gas-oils of the catalytic and the thermal cracking and 5-30 mass % of the indicated aromatic solvent. The technical result of the invention is expansion of the resources of the unctuous antiseptics for impregnation of the wood on the basis of the highly-viscous unctuous fractions of the heavy gas-oil of the thermal cracking and the heavy gas-oil of the catalytic cracking ensuring the good penetrating (saturating) capability and having the lower chilling temperature.
EFFECT: the invention ensures expansion of the resources of the unctuous antiseptics for impregnation of the wood on the basis of the highly-viscous unctuous fractions of the heavy gas-oil of the thermal cracking and the heavy gas-oil of the catalytic cracking providing the good penetrating (saturating) capability and having the lower chilling temperature.
1 tbl, 5 ex