CN103659967B - A kind of processing method of acetyl fibre material and the material obtained by the method - Google Patents
A kind of processing method of acetyl fibre material and the material obtained by the method Download PDFInfo
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- CN103659967B CN103659967B CN201210326392.1A CN201210326392A CN103659967B CN 103659967 B CN103659967 B CN 103659967B CN 201210326392 A CN201210326392 A CN 201210326392A CN 103659967 B CN103659967 B CN 103659967B
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Abstract
The invention provides a kind of processing method of acetyl fibre material; the method comprises: in confined conditions; by acetyl fibre material with contact with the acidic materials removed in acetyl fibre material containing ammonia with the mist of inert gas; wherein, in described mist oxygen concentration lower than 1 volume %.The invention provides a kind of material obtained by the disposal methods of acetyl fibre material of the present invention.The material free from extraneous odour, dimensional stability and the rotproofness that adopt the disposal methods of acetyl fibre material of the present invention to obtain are more excellent than the acetyl fibre material before taste removal; and mechanical property is not suffered a loss; its added value of product is high, can be used for making door and window, outdoor platform deck, indoor and outdoor furniture, floor, decorative wall panels etc.
Description
Technical field
The present invention relates to a kind of processing method of acetyl fibre material, and a kind of material obtained by the processing method of acetyl fibre material of the present invention.
Background technology
Adopt acid anhydrides to carry out acetylation process to timber, dimensional stability and the rotproofness of timber can be significantly improved, thus extend the service life of wooden product, effectively can save timber resources further.About the correlative study of acetylate wood treatment technology continue for more than 50 year; especially realized in developed country's this technological industrialization application such as the U.S., Germany, Holland, Japan; but up to the present; no matter adopt the timber after which kind of PROCESS FOR TREATMENT; certain excitant tart flavour is always had to exist in its product; this tart flavour not only can reduce consumer and choose wish to acetylate wood product; and acetylate wood product is used only for outdoor environment, range of application is very limited.
Therefore, develop a kind of method effectively can dispelling the tart flavour in acetylate wood and will there are very large industrial application value and economic benefits.
Summary of the invention
The object of the invention is to provide a kind of method effectively can dispelling the tart flavour in acetylate wood on the basis of existing technology.
For achieving the above object; the invention provides a kind of processing method of acetyl fibre material; the method comprises: in confined conditions; by acetyl fibre material with contact with the acidic materials removed in acetyl fibre material containing ammonia with the mist of inert gas; wherein, in described mist oxygen concentration lower than 1 volume %.
The invention provides a kind of material obtained by the disposal methods of acetyl fibre material of the present invention.
Tart flavour in acetyl fibre material can be dispelled (namely the sour acidic materials of tool are dispelled substantially) by the processing method of acetyl fibre material of the present invention effectively, and, on this basis, in a preferred embodiment of the invention, by by with contact with the mist of inert gas containing ammonia after acetyl fibre material carry out vacuum heat, make to adopt the processing method of acetyl fibre material of the present invention not only effectively can eliminate the tart flavour of acetylate wood, and due to the step through vacuum heat, make the dimensional stability of the material obtained and rotproofness more excellent, product life cycle extends further, range of application obtains larger expansion.
The material free from extraneous odour, dimensional stability and the rotproofness that adopt the disposal methods of acetyl fibre material of the present invention to obtain are more excellent than the acetyl fibre material before taste removal; and mechanical property is not suffered a loss; its added value of product is high, can be used for making door and window, outdoor platform deck, indoor and outdoor furniture, floor, decorative wall panels etc.
Other features and advantages of the present invention are described in detail in detailed description of the invention part subsequently.
Detailed description of the invention
Below the specific embodiment of the present invention is described in detail.Should be understood that, detailed description of the invention described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
According to the present invention; the processing method of acetyl fibre material of the present invention comprises: in confined conditions; by acetyl fibre material with contact with the acidic materials removed in acetyl fibre material containing ammonia with the mist of inert gas; wherein; in described mist, oxygen concentration is lower than 1 volume %, not containing oxygen in preferred described mist.
Those skilled in the art know the material all containing certain acid anhydrides, acid etc. in acetyl fibre material with acid taste; namely described in the present invention, acidic materials are well known to those skilled in the art; the present invention is no longer described in detail at this, and namely object of the present invention is removed by the aforementioned acid material in acetyl fibre material thus fundamentally dispel the tart flavour of acetyl fibre material.
According to the processing method of acetyl fibre material of the present invention, described that acetyl fibre material is wider with the range of choices of the condition contacted with the mist of inert gas containing ammonia, General Requirements acetyl fibre material is with containing ammonia, the acidic materials contacted in rear acetyl fibre material are removed substantially with the mist of inert gas, preferred acidic material is all removed, for achieving the above object, the condition of described contact generally comprises: the pressure of contact is 0.05-0.3MPa, is preferably 0.1-0.2MPa; Described acetyl fibre material and the described volume ratio containing the mist of ammonia and inert gas are 0.25-2:1, are preferably 0.3-1:1.
According to the processing method of acetyl fibre material of the present invention, on the basis of preceding solution, acetyl fibre material all can well be realized object of the present invention with carrying out contacting with the mist of inert gas containing ammonia, and the present inventor studies discovery in research process, when the described content containing ammonia in the mist of ammonia and inert gas is 1-20 volume %, be preferably 5-18 volume %, the content of inert gas is 80-99 volume %, when being preferably 82-95 volume %, can better realize object of the present invention, such as the 85-90% of the acidic materials in acetyl fibre material of the present invention can be removed.
In the present invention, described inert gas can be the various inert gases of prior art, such as, can be one or more in nitrogen, helium, argon gas and neon, and what use in the specific embodiment of the present invention is nitrogen.
According to the processing method of acetyl fibre material of the present invention; described that acetyl fibre material is wider with the range of choices of the time contacted with the mist of inert gas containing ammonia and temperature; the temperature of general contact be normal temperature (being generally 10-30 DEG C) to 40 DEG C, the time of contact is 0.5-4h.
According to the processing method of acetyl fibre material of the present invention; preferred method of the present invention also comprises: by with described containing ammonia contact with the mist of inert gas after acetyl fibre material carry out vacuum heat; the condition of preferred vacuum heat comprises: relative vacuum degree is-0.06MPa to-0.08MPa; temperature is 120-160 DEG C, and the time is 1-4h.By the heat treated step of aforementioned vacuum, the character of the material obtained by method of the present invention can be made to optimize further.
Carry out vacuum heat by with described not only remaining gas can be discharged containing the acetyl fibre material after ammonia contacts with the mist of inert gas in the present invention; and can make through the dimensional stability of the material of vacuum heat and rotproofness more excellent, product life cycle extends further.
In the present invention, to have multiple with described implementation of carrying out vacuum heat containing the acetyl fibre material after ammonia contacts with the mist of inert gas, generally by carrying out batch (-type) containing the container at acetyl fibre material place after ammonia contacts with the mist of inert gas and vacuumize and carry out heating to described in the process vacuumized and complete described vacuum heat treatment process, namely make with described in the container of vacuum state, keep a period of time containing the acetyl fibre material after ammonia contacts with the mist of inert gas at desired temperatures after pressure in container raise time general relative vacuum degree be elevated to-0.06MPa time (in container, create gas, this gas come from described containing ammonia contact with the mist of inert gas after acetyl fibre material), continue to vacuumize container and heat, when being generally elevated to-0.06MPa when relative vacuum degree raises after keeping a period of time, continue to vacuumize container and heat, according to needing this process of repetition, so can well complete the aforesaid vacuum heat step of the present invention.
According to the processing method of acetyl fibre material of the present invention; generally after the acidic materials that preceding method is removed in acetyl fibre material; remaining ammonia is had in the material obtained; therefore in order to remove the ammonia in material, preferred method of the present invention also comprises: contact the acetyl fibre material before final vacuum heat treatment with the mist of inert gas by with described contact with the ammonia removed in acetyl fibre material with the mist of steam with containing sour gas containing ammonia.The present inventor finds, in order to realize aforementioned object, generally contact the acetyl fibre material before final vacuum heat treatment containing ammonia with the mist of inert gas comprise with described with the condition contacted with the mist of steam containing sour gas: the temperature of contact is 90-130 DEG C, the pressure of contact is 0.1-0.4MPa, be 0.1-1:1 containing the volume ratio of sour gas and steam in the mist of sour gas and steam, mist containing sour gas and steam with described contact with the mist of inert gas containing ammonia after the volume ratio of acetyl fibre material be 0.2-5:1.
According to the processing method of acetyl fibre material of the present invention; the range of choices of the kind of described sour gas is wider; can be such as one or more in carbon dioxide, hydrogen sulfide etc.; for the present invention; preferred described sour gas is milk-toast sour gas; integrated cost and environmental protection angle are considered, preferred described sour gas is carbon dioxide.
According to the processing method of acetyl fibre material of the present invention, the range of choices of the kind of described acetyl fibre material is wider, the various materials obtained by acetylation process of prior art all can be used as acetyl fibre material of the present invention, and the present inventor finds in research process, the acetyl rate being the acetyl fibre material used in 5-40%(specific embodiment when the acetyl rate of described acetyl fibre material is 20-30%); Moisture content is 5-20 % by weight (moisture content of the acetyl fibre material used in specific embodiment is 6-20 % by weight); Rate of body weight gain can adopt method of the present invention well to process when being 10-40 % by weight (rate of body weight gain of the acetyl fibre material used in specific embodiment is 20-35 % by weight).
In the present invention, the acetyl rate of acetyl fibre material refer to hydroxyl in fibrous material the percentage that replaces by acetyl group, recorded by high pressure liquid chromatography method.
In the present invention, moisture content refers to the amount of contained humidity in acetyl fibre material, namely accounts for the percentage calculating of acetyl fibre material gross weight with moisture weight, is recorded by Weighing method.
In the present invention, rate of body weight gain refers to the ratio of the quality before the quality recruitment of acetyl fibre material and fibrous material acetylation, is recorded by Weighing method.
According to the processing method of acetyl fibre material of the present invention, described acetyl fibre material is preferably acetylate wood, is more preferably one or more in acetylation pine, acetylation poplar, acetylation China fir and acetylation Eucalyptus.
In the present invention; the preparation method of described acetyl fibre material can carry out with reference to prior art, such as, can prepare as follows: under acetylation condition, under acetylation diluent exists; fibrous material is contacted with acetylation reagent, the fibrous material after contact is carried out drying.
In the present invention, the acetylation condition that described acetylation condition can adopt this area routine to use, for the present invention, the temperature that preferred described acetylation condition comprises contact is 50-150 DEG C, pressure is 0.1-3.0MPa, the time is 0.5-10h.
In the present invention; the range of choices of the kind of described acetylation reagent and diluent is wider; the acetylation reagent that prior art routine uses and diluent all can use; for the present invention; preferred described acetylation reagent is one or more in the organic acid anhydrides such as acetic anhydride, propionic andydride and butyric anhydride, and described diluent is one or more in the acid of the aromatic hydrocarbons of C6-C10, the halogenated hydrocarbons of C1-C10 and C1-C10.
In the present invention, the range of choices of the kind of described fibrous material is wider, such as, can be softwood and/or broadleaf, concrete can be in pine material, poplar material, China fir material and Eucalyptus material one or more.
The processing method of acetyl fibre material of the present invention generally can be carried out in high voltage bearing tank body.
According to the processing method of acetyl fibre material of the present invention; preferred method of the present invention also comprises the material after by vacuum heat and carries out cooling (generally at room temperature cooling); so obtain described material of the present invention can directly use; all can know these those skilled in the art, be not described in detail at this.
The particularly preferred embodiment of one according to the present invention, the processing method of acetyl fibre material of the present invention can be undertaken by following concrete steps:
(1) acetyl fibre material is placed in heatable high pressure resistant tank body, (10-30 DEG C is generally) and passes into mist containing ammonia and inert gas to high pressure resistant tank body under normal temperature, in preferred high pressure resistant tank body, pressure is 0.1-0.2MPa, after keeping 1-2h, and Exhaust Gas;
(2) then pass into temperature be the mist of the carbon dioxide of 90-120 DEG C and steam to high pressure resistant tank body with acetyl fibre material to remove the residue ammonia in acetyl fibre material, then Exhaust Gas;
(3) then vacuum heat is carried out to the acetylate wood in high pressure resistant tank body, the condition of vacuum heat generally comprises: in high pressure resistant tank body, relative vacuum degree realizes for-0.06MPa to-0.08MPa(is generally vacuumized by batch (-type), concrete is generally first vacuumize high pressure resistant tank body to make the relative vacuum degree in high pressure resistant tank body be-0.08MPa, then a period of time is kept, when relative vacuum degree in high pressure resistant tank body rises to-0.06MPa, continue to vacuumize and make relative vacuum degree in high pressure resistant tank body be-0.08MPa, then a period of time is kept, according to needing this process of repetition), retention time is 1-4h, temperature is 120-160 DEG C,
(4) then temperature in high pressure resistant tank body is down to less than 40 DEG C, removes vacuum, namely obtain material of the present invention.
Tart flavour in acetyl fibre material can be dispelled (namely acidic materials are removed substantially) by the processing method of acetyl fibre material of the present invention effectively, and, on this basis, in aforementioned the preferred embodiment of the present invention, by by with contact with the mist of inert gas containing ammonia after acetyl fibre material carry out vacuum heat, make to adopt the processing method of acetyl fibre material of the present invention not only effectively can eliminate the tart flavour of acetylate wood, and due to the step through vacuum heat, make the dimensional stability of the material obtained and rotproofness more excellent, product life cycle extends further, range of application obtains larger expansion.
The invention provides a kind of material obtained by the disposal methods of acetyl fibre material of the present invention.
The material free from extraneous odour, dimensional stability and the rotproofness that adopt the disposal methods of acetyl fibre material of the present invention to obtain are more excellent than the acetyl fibre material before taste removal; and mechanical property is not suffered a loss; its added value of product is high, can be used for making door and window, outdoor platform deck, indoor and outdoor furniture, floor, decorative wall panels etc.
Below by way of specific embodiment, the present invention is described in detail, but the present invention is not limited to this.
In the present invention; amount of acidic substances adopts titration measuring: concrete can by acetyl fibre material grinds; get 5.0g; add the cold water 150ml newly boiled; jolting; place 3 hours; filter; obtain filtrate and filter residue, the filter residue obtained is washed and reclaims washing lotion, last merging filtrate and washing lotion; add instructions phenolphthalein solution 2-3 to drip; be titrated to pink with sodium hydroxide titration liquid (0.01mol/L), every 1ml sodium hydroxide titration liquid is equivalent to the free acid of 0.6005mg, calculates the amount of acidic substances in acetyl fibre material thus.
In the present invention, anti-swollen rate is calculated as follows and obtains: volume bulking factor × 100% of anti-swollen rate=(the volume bulking factor of the material after the volume bulking factor-process of acetyl fibre material before treatment)/acetyl fibre material before treatment.
The assay method that the mensuration of volume bulking factor specifies according to standard GB/T/T1934.2-2009 measures.
The assay method that corrosion resistance specifies according to standard GB/T/T13942.1-1992 measures.
Embodiment 1
(1) be that 2000mm × 200mm × 30mm(is longitudinal × tangential × radial by specification), (moisture content is 8 % by weight to Larch timber after acetylation process, rate of body weight gain is 30 % by weight, acetyl rate is 25%) pile up in heatable high pressure resistant tank body regularly, (be such as 20 DEG C) under normal temperature and pass into that in the mist of ammonia and nitrogen to high pressure resistant tank body, (in mist, the percentage by volume of ammonia is 8%, nitrogen remaining as whole), the mist of ammonia and nitrogen and the volume ratio of sheet material are 2:1, high pressure resistant tank body pressure is kept to be 0.2MPa, after keeping 2h, Exhaust Gas,
(2) then passing into temperature is that the mist of the carbon dioxide of 100 DEG C and steam is to high pressure resistant tank body, the percentage by volume of carbon dioxide in gas mixture is 15%, the mist of carbon dioxide and steam and the volume ratio of sheet material are 3:1, pressure in tank is kept to be 0.3MPa, after keeping 3h, Exhaust Gas;
(3) then carry out batch (-type) to high pressure resistant tank body vacuumize and heat, vacuumize and make relative vacuum degree in high pressure resistant tank body reach-0.08MPa, after keeping a period of time, when relative vacuum degree rises to-0.06MPa, continue to be evacuated down to-0.08MPa, so repeatedly, in period high pressure resistant tank body, temperature maintains 140 DEG C, maintenance 2h always;
(4) then temperature in high pressure resistant tank body is down to 40 DEG C; remove vacuum; obtain the material after processing; acetylation larchwood is after treatment without any peculiar smell (90 % by weight of acidic materials are removed); anti-swollen rate improves 15% than before process; corrosion resistance improves 10% than before process, and the timber before other physical and mechanical properties and taste removal is consistent.
Embodiment 2
(1) be that 2000mm × 150mm × 25mm(is longitudinal × tangential × radial by specification), (moisture content is 10 % by weight to Larch timber after acetylation process, rate of body weight gain is 32 % by weight, acetyl rate is 28%) pile up in heatable high pressure resistant tank body regularly, (be such as 20 DEG C) under normal temperature and pass into that in the mist of ammonia and nitrogen to high pressure resistant tank body, (in mist, the percentage by volume of ammonia is 12%, nitrogen remaining as whole), the mist of ammonia and nitrogen and the volume ratio of sheet material are 2:1, pressure in high pressure resistant tank body is kept to be 0.15MPa, after keeping 2h, Exhaust Gas,
(2) then passing into temperature is that the mist of the carbon dioxide of 110 DEG C and steam is to high pressure resistant tank body, the percentage by volume of carbon dioxide in gas mixture is 20%, the mist of carbon dioxide and steam and the volume ratio of sheet material are 3:1, pressure in tank is kept to be 0.3MPa, after keeping 2.5h, Exhaust Gas;
(3) then carry out batch (-type) to high pressure resistant tank body vacuumize and heat, vacuumize and make relative vacuum degree in high pressure resistant tank body reach-0.08MPa, after keeping a period of time, when relative vacuum degree rises to-0.06MPa, continue to be evacuated down to-0.08MPa, so repeatedly, in period high pressure resistant tank body, temperature maintains 150 DEG C, maintenance 1.5h always;
(4) then temperature in high pressure resistant tank body is down to 40 DEG C; remove vacuum; obtain the material after processing; acetylation larchwood is after treatment without any peculiar smell (92 % by weight of acidic materials are removed); anti-swollen rate improves 18% than before process; corrosion resistance improves 15% than before process, and the timber before other physical and mechanical properties and taste removal is consistent.
Embodiment 3
(1) be that 2000mm × 150mm × 40mm(is longitudinal × tangential × radial by specification), (moisture content is 12 % by weight to Larch timber after acetylation process, rate of body weight gain is 30 % by weight, acetyl rate is 25%) pile up in heatable high pressure resistant tank body regularly, (be such as 20 DEG C) under normal temperature and pass into that in the mist of ammonia and nitrogen to high pressure resistant tank body, (in mist, the percentage by volume of ammonia is 18%, nitrogen remaining as whole), the mist of ammonia and nitrogen and the volume ratio of sheet material are 3:1, high pressure resistant tank body pressure is kept to be 0.2MPa, after keeping 2h, Exhaust Gas,
(2) then passing into temperature is that the mist of the carbon dioxide of 120 DEG C and steam is to high pressure resistant tank body, the percentage by volume of carbon dioxide in gas mixture is 30%, the mist of carbon dioxide and steam and the volume ratio of sheet material are 4:1, pressure in tank is kept to be 0.3MPa, after keeping 3h, Exhaust Gas;
(3) then carry out batch (-type) to high pressure resistant tank body vacuumize and heat, vacuumize and make relative vacuum degree in high pressure resistant tank body reach-0.08MPa, after keeping a period of time, when relative vacuum degree rises to-0.06MPa, continue to be evacuated down to-0.08MPa, so repeatedly, in period high pressure resistant tank body, temperature maintains 160 DEG C, maintenance 1h always;
(4) then temperature in high pressure resistant tank body is down to 40 DEG C; remove vacuum; obtain the material after processing; acetylation larchwood is after treatment without any peculiar smell (90 % by weight of acidic materials are removed); anti-swollen rate improves 20% than before process; corrosion resistance improves 18% than before process, and the timber before other physical and mechanical properties and taste removal is consistent.
Embodiment 4
Process according to the method for embodiment 1,0.05MPa is maintained unlike tank body pressure high pressure resistant in step (1), the material obtained has tart flavour (acidic materials only have 60 % by weight to be removed), and other performances are as basically identical with the timber before taste removal in anti-swollen rate and corrosion resistance etc.
Embodiment 5
Process according to the method for embodiment 1, be 35% unlike the percentage by volume of ammonia in mist in step (1), because ammonia is excessive, the material obtained has larger ammonia taste, and anti-swollen rate reduces by 3% than the timber before taste removal, the timber before other performances and taste removal is basically identical.
Embodiment 6
Process according to the method for embodiment 1, make relative vacuum degree in high pressure resistant tank body maintain-0.02MPa to-0.05MPa in the process of vacuum heat unlike carrying out in step (3), temperature maintains 80 DEG C, and detailed process is as follows:
Carry out batch (-type) to high pressure resistant tank body vacuumize and heat, vacuumize and make relative vacuum degree in high pressure resistant tank body reach-0.05MPa, after keeping a period of time, when relative vacuum degree rises to-0.02MPa, continue to be evacuated down to-0.05MPa, so repeatedly, in period high pressure resistant tank body, temperature maintains 80 DEG C, maintenance 3h always;
The material obtained has certain tart flavour (80 % by weight of acidic materials are removed), and anti-swollen rate reduces by 3% than the timber before taste removal, and the timber before other performances and taste removal is basically identical.
As can be seen from the result of embodiment; the processing method acidic materials clearance high (clearance >=90%) of acetyl fibre material of the present invention; and in a preferred embodiment of the invention; process the dimension stability that obtains and rotproofness more excellent; mechanical property is not suffered a loss substantially; therefore, method of the present invention has very large industrial application value.
Embodiment 7
Process according to the method for embodiment 1, unlike the process without step (3) and step (4), the material obtained has a small amount of tart flavour (80 % by weight of acidic materials are removed), and the timber before other physical and mechanical properties and taste removal is consistent.
Comparative example 1
Process according to the method for embodiment 1, unlike, the mist in step 1 by the percentage by volume containing ammonia be 8%, the percentage by volume of oxygen is 5%, replaces remaining as the mist of whole nitrogen, all the other conditions are all identical with embodiment 1;
The material obtained has very large tart flavour (acidic materials only have 10 % by weight to be removed), and other performances are as basically identical with the timber before taste removal in anti-swollen rate and corrosion resistance etc.
More than describe the preferred embodiment of the present invention in detail; but the present invention is not limited to the detail in above-mentioned embodiment, within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each the concrete technical characteristic described in above-mentioned detailed description of the invention, in reconcilable situation, can be combined by any suitable mode.
In addition, also can be combined between various different embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (10)
1. the processing method of an acetyl fibre material, it is characterized in that, the method comprises: in confined conditions, by acetyl fibre material with contact with the acidic materials removed in acetyl fibre material containing ammonia with the mist of inert gas, wherein, in described mist oxygen concentration lower than 1 volume %;
The method also comprises: by with described containing ammonia contact with the mist of inert gas after acetyl fibre material carry out vacuum heat; Contact acetyl fibre material final vacuum heat treatment before with the mist of inert gas by with described contact with the ammonia removed in acetyl fibre material with the mist of steam with containing sour gas containing ammonia.
2. processing method according to claim 1, wherein, the condition of described contact comprises: the pressure of contact is 0.05-0.3MPa; Described acetyl fibre material and the described volume ratio containing the mist of ammonia and inert gas are 0.25-2:1; The described content containing ammonia in the mist of ammonia and inert gas is 1-20 volume %, and the content of inert gas is 80-99 volume %.
3. processing method according to claim 2, wherein, the condition of described contact comprises: the pressure of contact is 0.1-0.2MPa; Described acetyl fibre material and the described volume ratio containing the mist of ammonia and inert gas are 0.3-1:1; The described content containing ammonia in the mist of ammonia and inert gas is 5-18 volume %, and the content of inert gas is 82-95 volume %.
4. processing method according to claim 2, wherein, the condition of described contact also comprises: the temperature of contact is normal temperature to 40 DEG C, and the time of contact is 0.5-4h.
5. according to the processing method described in claim 1, wherein, the condition of described vacuum heat comprises: relative vacuum degree is-0.06MPa to-0.08MPa, and temperature is 120-160 DEG C, and the time is 1-4h.
6. processing method according to claim 1, wherein, contact acetyl fibre material final vacuum heat treatment before with the mist of inert gas by with described comprise with the condition contacted with the mist of steam containing sour gas containing ammonia: the temperature of contact is 90-130 DEG C, the pressure of contact is 0.1-0.4MPa, be 0.1-1:1 containing the volume ratio of sour gas and steam in the mist of sour gas and steam, mist containing sour gas and steam with described contact with the mist of inert gas containing ammonia after the volume ratio of acetyl fibre material be 0.2-5:1.
7. according to the processing method in claim 1-4 described in any one, wherein, the acetyl rate of described acetyl fibre material is 5-40%, and moisture content is 5-20 % by weight, and rate of body weight gain is 10-40 % by weight; Described acetyl fibre material is acetylate wood.
8. according to the processing method in claim 1-4 described in any one; wherein, described acetyl fibre material prepares as follows: under acetylation condition, under acetylation diluent exists; fibrous material is contacted with acetylation reagent, the fibrous material after contact is carried out drying.
9. processing method according to claim 8; wherein; the temperature that described acetylation condition comprises contact is 50-150 DEG C, pressure is 0.1-3.0MPa, the time is 0.5-10h; described acetylation reagent is one or more in acetic anhydride, propionic andydride and butyric anhydride; described diluent is one or more in the acid of the aromatic hydrocarbons of C6-C10, the halogenated hydrocarbons of C1-C10, C1-C10, and described fibrous material is softwood and/or broadleaf.
10. the material obtained by the processing method in claim 1-9 described in any one.
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| EP0213252B1 (en) * | 1985-08-28 | 1991-02-06 | A-Cell Acetyl Cellulosics AB | A process for improving dimensional stability and biological resistance of lignocellulosic material |
| WO1995023168A1 (en) * | 1994-02-24 | 1995-08-31 | A-Cell Acetyl Cellulosics Ab | Acetylation of lignocellulosic materials |
| EP1211033A2 (en) * | 2000-12-04 | 2002-06-05 | Yamaha Corporation | Treatment method for wooden material |
| CN101502975A (en) * | 2008-02-01 | 2009-08-12 | 泰坦木业有限公司 | Process for wood acetylation and product thereof |
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| CN103481342B (en) * | 2008-02-01 | 2018-09-07 | 泰坦木业有限公司 | The timber of acetylation |
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|---|---|---|---|---|
| EP0213252B1 (en) * | 1985-08-28 | 1991-02-06 | A-Cell Acetyl Cellulosics AB | A process for improving dimensional stability and biological resistance of lignocellulosic material |
| WO1995023168A1 (en) * | 1994-02-24 | 1995-08-31 | A-Cell Acetyl Cellulosics Ab | Acetylation of lignocellulosic materials |
| EP1211033A2 (en) * | 2000-12-04 | 2002-06-05 | Yamaha Corporation | Treatment method for wooden material |
| CN101502975A (en) * | 2008-02-01 | 2009-08-12 | 泰坦木业有限公司 | Process for wood acetylation and product thereof |
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