CN102755878B - Chemical modification method for sawdust material used for purification - Google Patents
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Abstract
The invention provides a chemical modification method for sawdusts used for purification. The chemical modification method is used for filtering lubricating oil and takes sawdusts of eucalyptus and birch as raw materials, and comprises the steps of: mixing the sawdusts of the eucalyptus and the birch according to a mass ratio of (1-10):1; adopting a mixed reaction solvent of quaternary ammonium salt, organic amine, lithium bromide, alkaline substance, mannitol and water with a mass ratio of (0.1-1):(0.01-1):(0.01-3):(0.25-15): (0.1-8):(15-200), and controlling the mass ratio between the sawdusts and the mixed reaction solvent to be 0.05-2.0; carrying out reaction for 2-200 hours under the condition of 10-80 DEG C, and preferentially, carrying out reaction for 4-150 hours under the reaction condition of 20-60 DEG C; and washing and drying to obtain the amorphous sawdusts which are high in specific surface and rich in functional structures. The sawdusts can be used for preparing various high-efficiency filters, especially an oil filter, and can be used for selectively absorbing a great number of colloids, thus greatly prolonging the service life of engine oil and reducing the emission of automobile exhaust harmful substances, particularly the emission of PM2.5.
Description
Technical field
The present invention relates to a kind of chemical modification method for the wood chip that filters, say more specifically a kind of for lubrication oil filtration, take the wood chip chemical catalysis modification processing method that eucalyptus and birch wood chip be raw material.
Background technology
The kind of lubricating oil purifier has a lot, and the filtering material adopting is also varied.Except common papery filtering material, the material such as useful woven wire, wood chip also.Aspect conventional filtration, there is good application.Along with the popularization of Euro V emissions, timber has porous and permeability, adsorptivity, is widely used in the field of purification of gas, liquid, as purification of waste water, waste gas, oil product etc.Different with method of modifying according to the kind of timber, its absorption property purifying property difference is very large.
To the processing method of vapour, diesel lubrication oil, is at present generally to adopt 200 order copper mesh to add the filter core that filter paper is made, also have adopt nonmetal filter core as corrugated paper and high molecular filter element etc.In order to extend the service life of lubricating oil, people arrange a kind of bypass type lubricating oil filter of manufacturing by corrugated paper on diesel engine, because lubricating oil is oxidizable under hot conditions, lubricating oil after corrugated paper bypass is got back in the oil sump of machine, rotten too early thereby the secondary oxidation time that has increased lubricating oil causes.Above-mentioned metal filtering core and nonmetal filter core are all the impurity (comprising organic impurities and inorganic impurity) in filtering lubricant oil merely, fineness after its filtration is more than 10 μ m, after operation a period of time (or kilometer), because of the physical and chemical index more oil change that declines still, otherwise can affect service life of engine.
In view of above-mentioned weak point of the prior art, a lot of inventors propose multiple improving one's methods.Sun Kezhen etc. once proposed the patent of invention that a key name is called " oil purifier filter core and manufacture method thereof ", (Granted publication number: CN1021200C).This patent discloses a kind of filter core for whole flow depth purifier of lubricating oil for petrol and diesel oil machine lube oil purification, and it is made by wood chip, string and auxiliary material thereof.This patent utilization string, can be that wood-fibred can be also cotton fiber, and as wood chip " adhesive ", wherein the content of string is up to the 67-70% of wood chip.
Yangjing, Shen has proposed the patent of invention (application number: 02104327.2), adopt wood chip 30 ~ 80%, cotton fiber 10 ~ 30%, flaxen fiber 20 ~ 60%, cocoanut shell 20 ~ 70%, auxiliary material 10 ~ 50% of " all flow-type deeply adsorbing fiber purifier filter element ".By wood chip, cotton fiber, flaxen fiber, cocoanut shell, through stirring, after basic treatment, by mold die moulding, make the engine oil filtering apparatus of motor vehicles.
Zhou Xiang etc. have proposed the patent of invention (application number: 200610152175.X) of " gas phase, liquid phase fluid multifunctional filtering core and manufacture method thereof ", the manufactured materials that this patent proposes core body comprises: containing the natural plants particle of lignin, high-specific surface area activated carbon, natural minerals particle, natural fiber material, auxiliary additive and binding material; Can be for filtration and the purification of all kinds of gas, liquid.
Sun Kezhen proposes the utility model patent (application number: 02253376.1) that a key name is called " oil purifier filter core ", the filtering core of this patent by string be ground into granular plant material and mix and form, described string and the weight ratio of wood chip are 0.5 ~ 1.5:15 ~ 25, are at least provided with a rigid support in filtering core.The pollutant holding capability of this filter is large, can adsorb in large quantities mechanical admixture, and circulating resistance is little, and filter efficiency is high.
Sun Kezhen also propose a key name be called " oil purifier filter core and manufacture method thereof " and patent of invention (application number: 02130649.4), composition and the technique of formed of xylolite have been proposed, described string and the weight ratio of wood chip are 0.5 ~ 1.5:15 ~ 25, by string be ground into granular plant material and mix with sodium carbonate liquor and process, through high-temperature pressurizing moulding, be used for oil purifier filter core, can guarantee that the fineness of filtering rear residual impurity is below 5 μ, filter core compressive resistance can reach 33MPa.
Above-mentioned patent using a plant material if wood chip is as primary raw material, utilize wood chip to absorb volumetric expansion after moisture content and shrink this principle after dry, it is fully made to required shape after water saturation, drying makes to have many spaces between the rear wood chip of moisture evaporation, forms the filtering bodies of porous.
These methods are only simple alkali treatment, steam treatment etc. to wood chip, that has improved wood chip can processing type, to extending the service life of cleaner, the precision that improves filtration solid impurity has some improvement, can reduce the impact of part acidic materials, and there is no good selectively removing effect for colloid etc., be therefore difficult to improve engine exhaust emission.
The present invention utilizes lithium bromide and quaternary ammonium salt, organic amine, the catalysis coupling of alkali and sweet mellow wine, by the osmosis of sweet mellow wine and lithium bromide, when the lignin of partially crystallizable being decomposed with alkali, quaternary ammonium salt and organic amine are grafted in the undefined structure of timber, wood chip is carried out to surface functional group coupling, improve specific surface and the lipophile of wood chip, strengthened the presoma to PM2.5---colloid, the selective absorption of the large molecular polarity material such as polycyclic aromatic hydrocarbon removes effect, thereby purified machine oil, reduced the discharge of harmful substance in motor exhaust.
Summary of the invention
A kind of method that the object of this invention is to provide simple chemical catalysis modified wood chips, make the surface functionalization of wood chip, thereby improve the strainability of wood chip to colloid, polycyclic aromatic hydrocarbon isopolarity material, extend the service life of filter, reduce the PM2.5 discharge of motor exhaust.
Theme of the present invention is, on the basis of existing technology, preferred timber, then by adding cheap organic amine, lithium bromide, sweet mellow wine, by the effect of the oleophylic hydrophilic functional groups of highly basic and quaternary ammonium salt, composition or the key element that hinders fluid permeability dissolved or corroded in catalysis, to change aspiration rate, by the functional group of alkalescence in coupling in wood chip duct, make the active raising of wood chip, thereby improve porosity and the selective absorption performance of wood chip.
From the selection of timber, take eucalyptus wood chip as main material, tail alpine ash particularly, Eucalyptus urophylla and alpine ash, be equipped with certain birch wood chip, preferably kind is American gray birch, paper birch and white birch, by special chemical catalysis method, the crystalline texture in timber is decomposed, make on the catheter wall of eucalyptus, vestured pit between pipe in pit is opened, thereby obtain more undefined structure and functional group, improve eucalyptus wood chip to the colloid in lubricating oil, easily the multiring aromatic hydrocarbon substance of coking has very strong adsorption capacity, can greatly reduce the NOx of motor exhaust, SOx discharge, particularly the discharge of PM2.5 is greatly reduced.Eucalyptus has pit between abundant pipe, can utilize interface for absorption provides more, and birch has certain adhesive property simultaneously, is conducive to the final moulding of wood chip.
The object of this invention is to provide a kind of chemical modification method purifying with wood chip material, it comprises the following step, eucalyptus wood chip and birch wood chip are mixed according to the ratio of mass ratio 1～10:1, then put into by quaternary ammonium salt, organic aminated substance, lithium bromide, basic species, in the mixed solvent that sweet dew alcohol and water forms, react, quaternary ammonium salt in described mixed solvent, organic aminated substance, lithium bromide, basic species, the mass ratio of sweet dew alcohol and water is 0.1～1:0.01～1:0.01～3:0.25 ~ 15:0.1 ~ 8:15 ~ 200, the mass ratio of wood chip and mixed reaction solvent is 0.05 ~ 2.0, described reaction is carried out 2 ~ 200 hours under the condition of 10 ~ 80 ℃, after reaction, wood chip obtains high-ratio surface through washing and drying, the wood chip that unformed functional structure is abundant.
Described reaction can according to circumstances optionally be stirred, so that mixing of materials is more even.The most frequently used washing methods in this area is with clear water, pure water and wood chip mix and blend, then with filtering or centrifugal dehydration.The most frequently used furnace drying method in this area is electrothermal drying or heated-air drying; Bake out temperature is suitably 50～150 ℃; Drying time can suitably be selected according to different temperature, generally at 5～150 hours.
In mixed solvent of the present invention, the mass ratio of quaternary ammonium salt, organic aminated substance, lithium bromide, basic species, sweet dew alcohol and water is preferably 0.2～0.8:0.02～0.5:0.18～2.5:4 ~ 12:0.3 ~ 5:25 ~ 150.
Reaction of the present invention is preferably carried out 4 ~ 150 hours under the condition of 20 ~ 60 ℃.
Quaternary ammonium salt of the present invention is that four hydrogen atoms in ammonium ion are all replaced the compound generating, general formula R by alkyl
4nX, wherein four alkyl R can be identical, also can be different, be preferably C
1-20alkyl.Mostly X is halogen anion (F, Cl
-, Br
-, I
-), also acid group (as HSO
4 -, RCOO
-deng).The instantiation of described quaternary ammonium salt comprises and is selected from benzyltriethylammonium chloride, the chloro-2-hydroxypropyl-trimethyl ammonium chloride of 3-, dodecyl benzyl dimethyl ammonium chloride, tetraethylammonium bromide, 4 bromide, tetrabutylammonium chloride, DTAC, one or more in hexadecyltrimethylammonium chloride.
Organic aminated substance of the present invention is fatty amines and alcamine compound or mutually mixes by them the mixed amine compounds forming.Described organic aminated substance refers to the organic material that organic material and ammonia generation chemical reaction generate, and is divided into seven large classes, and fatty amines, alcamines, amide-type, alicyclic ring amine, aromatic amine, naphthalene are amine, other amine etc.Fatty amine is the organic derivative of ammonia, and its carbon chain lengths is at C
8-22the large class organic amine compound of in scope, is divided into primary amine, secondary amine and tertiary amine and the large class of polyamines four, and primary, secondary, tertiary amine depends on the number that the hydrogen atom in ammonia is replaced by alkyl.
Organic aminated substance of the present invention is preferably alcamine compound, as MEA, and diethanol amine, triethanolamine.
In method of the present invention, wood chip is 0.1 ~ 1.0 with the preferred mass ratio of mixed reaction solvent, can adopt machinery or manually stir during mixing, improves reaction mixed effect.
Eucalyptus of the present invention is that Myrtaceae (Myrtaceae) eucalyptus belongs to (Eucalyptus) plant, is preferably and is selected from one or more in tail alpine ash, Eucalyptus urophylla and alpine ash.
Birch of the present invention is Betulaceae (Betulaceae) Betula (Betula) plant, is preferably and is selected from one or more in American gray birch, paper birch and white birch.
Basic species of the present invention typically refers to has the material that the ability of electronics is provided or accepts the ability of proton.According to substance characteristics, divide and comprise organic base and inorganic base.The preferred basic species of the present invention is to be selected from one or more in NaOH, potassium hydroxide, sodium carbonate, sodium acid carbonate, sodium metasilicate, waterglass, caustic alcohol.
Another object of the present invention is according to a kind of purification modified wood chips material, and described modified wood chips material is obtained by above-mentioned improved chemical processes.The mean size of this wood raw material is generally 8-20 order.Can be according to different instructions for uses, high by the larger ratio of granularity when gas filtration, as some more in 4-8 object; When accurate fuel oil filters, in wood chip, small grain size 20-30 object can be some more.
Another object of the present invention is to provide a kind of cleaner, and this cleaner contains the purification modified wood chips material that the above-mentioned chemical modification method of the present invention obtains.Cleaner of the present invention, generally refers to the filtration of engine aspirating system, lubricating system and combustion system medium.Described cleaner is preferably fuel oil for engine, machine oil or air filter.Preferred, cleaner of the present invention is engine oil filter.
This wood chip can be for the preparation of the high-efficiency lubricating oil strainer of environmental protection, and the harmful constituent of adsorpting lubrication oil, improves lubricants performance and life-span in a large number, greatly reduces the discharge of the PM2.5 of engine.
Compared with prior art, the present invention is preferred seeds, and particularly adopted the catalyst of quaternary ammonium salt, organic aminated substance, lithium bromide, can not only fast and effeciently dissolve and remove the oligosaccharides such as Arabinogalactan and resin, dissolve or corrode composition or the key element that hinders fluid permeability, aspirated pit is opened, improve the permeability of wood chip, reduce timber distortion, accelerated wood chip modification speed simultaneously, greatly improved absorption and the filter activity of modified wood chips.
Catalytic action by quaternary ammonium salt etc. make in the cell membrane of eucalyptus wood chip and birch wood chip on crystal region surface fiber element strand and the compound sugar in amorphous regions (the non-directional cellulose molecular chain on cellulose microfibril crystal region surface and Matrix region) by alkali stripping, some hemicelluloses because of terminal groups react with NaOH produce so-called " peeling " phenomenon (Yang Shuhui, Plant Fiber Chemistry. China Light Industry Press.2001,214 ~ 243), its acetyl group existing above comes off, and makes like this crystal region surface fiber element strand and amorphous regions active group part exposed, and the power that attracts each other strengthens.On the one hand nondirectional cellulose molecular chain is attracted each other with crystal region and region is directed, causes the width increase of timber crystal region.Amorphous regions is under alkali effect on the other hand, and the hemicellulose in Matrix region, lignin and some other compound sugar obtain larger swollen, cause the area change of amorphous regions.Degree of crystallinity reduces.
Modified wood chips prepared by the present invention is after moulding, applicable to the processing of lubricating oil filtering, air cleaning, cooling water purification, sewage, the fields such as purification of fuel oil.
Accompanying drawing explanation
Fig. 1 is X-ray diffraction (XRD) the crystalline phase figure of embodiment 1 gained sample;
Fig. 2 is X-ray diffraction (XRD) the crystalline phase figure of comparative example 1 gained sample.
The specific embodiment
The invention will be further described for following examples, but do not limit application of the present invention.
In each of the embodiments described below, reagent used is commercially available industrial primes or chemically pure reagent, and laboratory apparatus used and device are open commercially available prod.
Embodiment 1
Get alpine ash wood chip and American gray birch wood chip according to 5 kilograms, the mixture of mass ratio 4:1, the granularity of described wood chip is 8-20 order, by benzyltriethylammonium chloride, triethanolamine, lithium bromide, NaOH, the mass ratio of sweet dew alcohol and water is the mixed solvent of 0.3:0.03:0.25:4:0.3:150, the mass ratio of wood chip and mixed reaction solvent is 0.4, first mixed solvent is put into the stirred autoclave with polytetrafluoro liner of 50 liters, then add mixing wood chip, under the condition of 60 ℃, confined reaction is 24 hours, clear water drains after washing 4 times after filtration, putting into 120 ℃, baking oven dries 8 hours, can obtain the wood chip of high-ratio surface, be numbered T-1, X ' the pert PRO type X-ray diffractometer that gained sample adopts Dutch Panalytical company to produce is measured, Co target K α beta radiation, power 40 kV * 40 mA, pipe stream 100mA, sweep limits 2 θ=5 °～80 °, its result as shown in Figure 1.
Embodiment 2
Get Eucalyptus urophylla wood chip and white birch wood chip according to 5 kilograms, the mixture of mass ratio 10:1, granularity is 4-20 order, adopt tetraethylammonium bromide, triethanolamine, lithium bromide, sodium carbonate, sweet mellow wine, the mass ratio of water is 0.2:0.3:2.5:12:0.5:70, the mass ratio of wood chip and mixed reaction solvent is 1.0, first mixed solvent is put into the stirred autoclave with polytetrafluoro liner of 50 liters, then add mixing wood chip, under the condition of 50 ℃, confined reaction is 48 hours, clear water drains after washing 8 times after filtration, putting into 100 ℃, baking oven dries 10 hours, obtain the wood chip of high-ratio surface, be numbered T-2, the peak type of its XRD crystalline phase figure diffraction maximum, intensity and position and Fig. 1 are similar.
Embodiment 3
Get tail alpine ash wood chip and paper birch wood chip according to 5 kilograms, the mixture of mass ratio 1:1, granularity is 8-20 order, adopt 4 bromide, diethanol amine, lithium bromide, basic species (the mass ratio 1:2 of sodium metasilicate and NaOH), sweet mellow wine, the mass ratio of water is 0.2:0.03:0.5:5:8:120, the mass ratio of wood chip and mixed reaction solvent is 0.1, first mixed solvent is put into the stirred autoclave with polytetrafluoro liner of 50 liters, then add mixing wood chip, under the condition of 40 ℃, confined reaction is 60 hours, after washing 6 times with clear water after filtration, drain, putting into 90 ℃, baking oven dries 15 hours, obtain the wood chip of high-ratio surface, be numbered T-3, the peak type of its XRD crystalline phase figure diffraction maximum, intensity and position and Fig. 1 are similar.
Embodiment 4
Get tail alpine ash wood chip and white birch wood chip according to 5 kilograms, the mixture of mass ratio 5:1, granularity is 8-20 order, adopt the chloro-2-hydroxypropyl-trimethyl ammonium chloride of 3-, MEA, lithium bromide, basic species (the mass ratio 2:1 of sodium metasilicate and sodium carbonate), sweet mellow wine, the mass ratio of water is 0.1:0.5:0.2:6:0.1:25, the mass ratio of wood chip and mixed reaction solvent is 2.0, first mixed solvent is put into the stirred autoclave with polytetrafluoro liner of 50 liters, then add mixing wood chip, under the condition of 50 ℃, confined reaction is 100 hours, clear water washs after 10 times after filtration, putting into 130 ℃, baking oven dries 10 hours, obtain the wood chip of high-ratio surface, be numbered T-4, the peak type of its XRD crystalline phase figure diffraction maximum, intensity and position and Fig. 1 are similar.
Comparative example 1
The method that the explanation of this comparative example proposes according to the people such as Sun Kezhen (ZL 02130649.4, oil purifier filter core and manufacture method thereof) is processed the effect of wood chip.Get tail alpine ash wood chip and white birch wood wood chip according to 5 kilograms, the mixture of mass ratio 5:1, granularity is 8-20 order, add 90% sodium carbonate liquor 500g, after mixing, add water to and flood wood chip, stir, standing 15 hours of normal temperature, after clear water washs 8 times, filter and drain, the baking oven that is placed in 120 ℃ dries 10 hours, obtains modified wood chips, be numbered BZ-1, peak type, intensity and the position of its XRD crystalline phase figure diffraction maximum are as shown in Figure 2.。
The method gained wood chip specific surface of the present embodiment explanation the inventive method and comparative example and for CO
2the effect of absorption.
Adopt the ASAP-2020 type micropore instrument of U.S. Micromeritics company, with high-purity CO
2and high-purity N
2for adsorbate, the CO when 298 K
2adsorbance and BJH specific surface, 150 ℃ that before wood chip sample test, all pass through 6h vacuumize pretreatment.
Adopting containing colloid is that 1.27% machine oil is raw material, gets 2 grams of wood chips, and the mass ratio of wood chip and machine oil is 1:100, and at 80 ℃, stirring and adsorbing is 6 hours, by the content of colloid in the final machine oil of column chromatography analysis, the performance of testing the adsorption gel of gained wood chip.
As can be seen from Table 1, it is little that blank wood chip is processed front specific surface difference, utilizes the inventive method gained wood chip to compare its specific surface and CO with comparative example 1 gained wood chip
2adsorbance improves greatly, illustrates that the inventive method can improve porosity and the permeability of wood chip effectively, and the basic group of surface coupling can make wood chip greatly improve the selective absorption amount of colloid in oil product, will improve the purifying property of cleaner.
Table 1
In conjunction with XRD, characterize, in the embodiment of the present application, more disperse is a little for the XRD diffraction peak shape of gained sample, compare with comparative example, the position of diffraction maximum does not significantly change, and at 17.5 ° and 26.8 °, locates all there is corresponding diffraction maximum, illustrates to process timber crystal region is still existed, but the lower more disperse of peak shape, the distance that is crystal layer does not change, but the reduction of crystal region concentration, partially crystallizable district is destroyed.From diffracted intensity, the sample diffraction peak intensity that the embodiment of the present application obtains is starkly lower than the sample of comparative example, the chemical modification of this explanation the present embodiment is processed the crystal region of timber microfibril and noncrystalline domain impact remarkable, can make crystal region microfibril hydroxyl exposed, be combined and obtain activating inner surface with quaternary ammonium salt, hydrogen bonding is reduced, and structure is tending towards disperseing; The chemical modification of the present embodiment is processed the nonactive group in surface of noncrystalline domain inner cellulose microfibril is activated by coupling simultaneously, eliminated aspirated pit, the etherified hydroxy groups group of the coupling on cell membrane microfibril weakens crystal region simultaneously, has increased the function absorption surface of wood chip.
Comparative example 2
(ZL 02130649.4 according to people such as Sun Kezhen for the explanation of this comparative example, oil purifier filter core and manufacture method thereof) wood chip that obtains of the method that proposes, the wood chip obtaining with embodiment 1, utilize Pan to keep the actual effect contrast that assemble method that the people such as spring (application number: 201110373069.5, a kind of oil filter is crossed the compaction tool of filter core) propose is made oil strainer.
Use respectively wood chip 200g, according to above-mentioned packaging technology and equipment, be assembled into respectively a cleaner, on Mitsubishi's dagger-axe basket automobile, test, engine model is 4G69, and discharge capacity is 2.4 liters, with AVL Digas 4000 Light automobile emission gas analyzer instrument analyses, starts the tail gas average composition after 200 seconds, with the Lighthouse3016IAQ laser particle counter after proofreading and correct, analyze the content of PM2.5, result is as shown in table 2 simultaneously.
As can be seen from Table 2, carry out respectively after the test of 20000 kilometers, utilize the oil filter L-1 of comparative example 1 gained wood chip assembling to compare with the cleaner L-2 of the embodiment of the present invention 1 method gained wood chip assembling, in the tail gas of L-1, PM2.5 substantially exceeds new car discharge, NOx in while tail gas, the content of hydrocarbon (TCH) and CO improves greatly, and use instead after L-2 cleaner, the tail gas nuisance of this car and the discharge of PM2.5 significantly reduce, its result and new car are close, show the oil filter that the embodiment of the present invention 1 gained wood chip is made, can greatly improve the adsorption efficiency of colloid, motor vehicle exhaust emission is had to significant reducing effect.
Table 2
Testing result when * new car data dispatches from the factory for this car for 2010.
Claims (11)
1. one kind purifies the chemical modification method of using modified wood chips material, it comprises following steps, eucalyptus wood chip and birch wood chip are mixed according to the ratio of mass ratio 1～10:1, then put into by quaternary ammonium salt, organic aminated substance, lithium bromide, basic species, in the mixed solvent that sweet dew alcohol and water forms, react, quaternary ammonium salt in described mixed solvent, organic aminated substance, lithium bromide, basic species, the mass ratio of sweet dew alcohol and water is 0.1～1:0.01～1:0.01～3:0.25～15:0.1～8:15～200, the mass ratio of wood chip and mixed reaction solvent is 0.05～2.0, described reaction is carried out 2～200 hours under the condition of 10～80 ℃, after reaction, wood chip obtains high-ratio surface through washing and drying, the modified wood chips material that unformed functional structure is abundant, the general formula of described quaternary ammonium salt is R
4nX, wherein R is identical or different C
1-20alkyl, X is F, Cl
-, Br
-, I
-or HSO
4 -, described basic species is to be selected from one or more in NaOH, potassium hydroxide, sodium carbonate, sodium acid carbonate, sodium metasilicate, caustic alcohol, described organic aminated substance is alcamine compound.
2. method according to claim 1, in wherein said mixed solvent, the mass ratio of quaternary ammonium salt, organic aminated substance, lithium bromide, basic species, sweet dew alcohol and water is 0.2～0.8:0.02～0.5:0.18～2.5:4～12:0.3～5:25～150.
3. method according to claim 1, wherein said reaction is carried out 4～150 hours under the condition of 20～60 ℃.
4. method according to claim 1, wherein said quaternary ammonium salt is for being selected from benzyltriethylammonium chloride, the chloro-2-hydroxypropyl-trimethyl ammonium chloride of 3-, dodecyl benzyl dimethyl ammonium chloride, tetraethylammonium bromide, 4 bromide, tetrabutylammonium chloride, DTAC, one or more in hexadecyltrimethylammonium chloride.
5. method according to claim 1, wherein the mass ratio of wood chip and mixed reaction solvent is 0.1～1.0.
6. according to the method described in claim 1-5 any one, wherein said eucalyptus is to be selected from one or more in tail alpine ash, Eucalyptus urophylla and alpine ash.
7. according to the method described in claim 1-5 any one, wherein said birch is to be selected from one or more in American gray birch, paper birch and white birch.
8. the purification modified wood chips material obtaining according to method described in claim 1-7 any one.
9. a cleaner, contains the purification modified wood chips material that method obtains described in claim 1-7 any one.
10. cleaner according to claim 9, this cleaner is fuel oil for engine, machine oil or air filter.
11. cleaners according to claim 10, this cleaner is engine oil filter.
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| CN103055820B (en) * | 2012-12-17 | 2014-08-06 | 福州赛孚玛尼环保科技有限公司 | Chemical modification method of purification corn cob crumbs |
| CN104437392A (en) * | 2014-10-17 | 2015-03-25 | 广西大学 | Method for adsorbing Cr (VI) with modified eucalyptus bark |
| CN104275160B (en) * | 2014-10-30 | 2016-06-29 | 桂林理工大学 | The preparation method of Eucalyptus-calcium chloride compound adsorbent |
| CN104587974A (en) * | 2015-01-23 | 2015-05-06 | 江西师范大学 | High-cationic-degree cotton fiber and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104046779B (en) * | 2014-06-23 | 2016-08-24 | 北京科技大学 | A kind of garlic waste is utilized to extract the method for noble metal in hydrochloric acid medium solution |
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