CN103834421B - Environment-friendly type modified coal asphalt and preparation method thereof - Google Patents
Environment-friendly type modified coal asphalt and preparation method thereof Download PDFInfo
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- CN103834421B CN103834421B CN201410110270.8A CN201410110270A CN103834421B CN 103834421 B CN103834421 B CN 103834421B CN 201410110270 A CN201410110270 A CN 201410110270A CN 103834421 B CN103834421 B CN 103834421B
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- coal tar
- tar pitch
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- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 239000010426 asphalt Substances 0.000 title abstract description 15
- 239000003245 coal Substances 0.000 title abstract description 8
- 239000003607 modifier Substances 0.000 claims abstract description 30
- 239000012046 mixed solvent Substances 0.000 claims abstract description 27
- 239000000203 mixture Substances 0.000 claims abstract description 12
- 238000003756 stirring Methods 0.000 claims abstract description 12
- 239000002904 solvent Substances 0.000 claims abstract description 11
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000010992 reflux Methods 0.000 claims abstract description 5
- 239000011294 coal tar pitch Substances 0.000 claims description 95
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 24
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 claims description 18
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 claims description 10
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 10
- 239000011300 coal pitch Substances 0.000 claims description 9
- 238000005292 vacuum distillation Methods 0.000 claims description 7
- CHIHQLCVLOXUJW-UHFFFAOYSA-N benzoic anhydride Chemical group C=1C=CC=CC=1C(=O)OC(=O)C1=CC=CC=C1 CHIHQLCVLOXUJW-UHFFFAOYSA-N 0.000 claims description 6
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical group O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 16
- 238000006243 chemical reaction Methods 0.000 abstract description 11
- 125000005575 polycyclic aromatic hydrocarbon group Chemical group 0.000 abstract description 10
- FMMWHPNWAFZXNH-UHFFFAOYSA-N Benz[a]pyrene Chemical compound C1=C2C3=CC=CC=C3C=C(C=C3)C2=C2C3=CC=CC2=C1 FMMWHPNWAFZXNH-UHFFFAOYSA-N 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 2
- MWPLVEDNUUSJAV-UHFFFAOYSA-N anthracene Chemical compound C1=CC=CC2=CC3=CC=CC=C3C=C21 MWPLVEDNUUSJAV-UHFFFAOYSA-N 0.000 description 4
- BBEAQIROQSPTKN-UHFFFAOYSA-N pyrene Chemical compound C1=CC=C2C=CC3=CC=CC4=CC=C1C2=C43 BBEAQIROQSPTKN-UHFFFAOYSA-N 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000011280 coal tar Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- CWRYPZZKDGJXCA-UHFFFAOYSA-N acenaphthene Chemical compound C1=CC(CC2)=C3C2=CC=CC3=C1 CWRYPZZKDGJXCA-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000000711 cancerogenic effect Effects 0.000 description 2
- 231100000315 carcinogenic Toxicity 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- GVEPBJHOBDJJJI-UHFFFAOYSA-N fluoranthrene Natural products C1=CC(C2=CC=CC=C22)=C3C2=CC=CC3=C1 GVEPBJHOBDJJJI-UHFFFAOYSA-N 0.000 description 2
- 150000002469 indenes Chemical class 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- -1 polycyclic compound Chemical class 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- KPAPHODVWOVUJL-UHFFFAOYSA-N 1-benzofuran;1h-indene Chemical compound C1=CC=C2CC=CC2=C1.C1=CC=C2OC=CC2=C1 KPAPHODVWOVUJL-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000029936 alkylation Effects 0.000 description 1
- 238000005804 alkylation reaction Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000003183 carcinogenic agent Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000002715 modification method Methods 0.000 description 1
- 239000011331 needle coke Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
Landscapes
- Working-Up Tar And Pitch (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to environment-friendly type modified coal asphalt and a preparation method thereof. The preparation method in the technical scheme comprises the following steps: placing 20-30 weight parts of coal asphalt into a reaction kettle with a reflux unit; then, under the conditions that temperature is 70 DEG C-90 DEG C and stirring speed is 80 r/minute-100r/minute, adding 67-77 weight parts of mixed solvent into the reaction kettle, stirring for 10 minutes, re-adding 2.6-3.2 weight parts of modifier and 0.20-0.32 weight parts of sulfuric acid under the condition that temperature and stirring speed are the same, and stirring for 1 hour-5 hours to obtain a coal asphalt mixture; and finally, under the condition with the temperature of 100 DEG C-110 DEG C, distilling the obtained coal asphalt mixture under reduced pressure to recycle solvent to prepare the environment-friendly type modified coal asphalt. According to the invention, process is simple, reaction temperature is low, dosage of the modifier is less, the solvent can be recycled, cost is low and content of polyaromatic hydrocarbon 3,4-benzopyrene in the coal asphalt can be effectively lowered.
Description
Technical field
The invention belongs to coal tar pitch technical field.Be specifically related to a kind of environment-friendly modified coal tar pitch and preparation method thereof.
Background technology
Coal tar pitch is isolated bulk product in coal tar processing process, accounts for 50 ~ 60wt% of coal tar total amount, and its processing and utilization level and efficiency is most important to whole coal tar processing.At present, coal tar pitch is mainly used in binding agent and the impregnating agent of carbon pole, also for carbon black, anticorrosive paint, needle coke and carbon fiber etc., because the demand in downstream is limited, and the serious production capacity surplus of coal tar pitch.
Since the seventies in last century, many countries such as Germany, Switzerland, France, Poland successively produce and use coal-petroleum base mix asphalt to be used for paving the way.Long use shows, with the anti-deformation that coal-petroleum base mix asphalt paves is strong, wear resistence good, the security performance of driving increases, especially under the adverse weather conditions such as rainy day, property retention is good.In addition, coal tar pitch cost is low, and price is only asphalt 40 ~ 50%, effectively can not only alleviate China's bitumen for road use situation that supply falls short of demand, also significantly can reduce the construction cost of highway engineering as replaced asphalt to pave the way with coal tar pitch.Therefore, with coal tar pitch as bitumen for road use, the added value of coal tar pitch can not only be improved and solve the problem of coal tar pitch surplus, and for improving China's Expressway Asphalt quality, solve China's oil asphalt quality is not high and product is short problem all tool be of great significance.
Owing to containing polycyclic aromatic hydrocarbon carcinogenic substance 3,4-BaP etc. in coal tar pitch, in fact constrain coal tar pitch for paving the way.To this, people have carried out large quantifier elimination, achieve certain achievement: Germany adopts vacuum distillation method (US 5262043), and the method is 330-1000m by a disengagement area
2/ m
3evaporimeter, when pressure is 1MPa and temperature is 300 ~ 380 DEG C by coal tar pitch decompression distillation, coal tar pitch is 2 ~ 10min in the evaporimeter time of staying, contained by the coal tar pitch obtained 3, though 4-BaP is less than 50 ppm, the manufacturing cost of this technique device therefor is high, and power consumption is large; Poland adopts polymeric modification method (Janusz Zieli ń ski (Benzo [a] pyrene in coal tar pitch:chemical conversion in situ by alkylation, fuel, 75,1543-1548,1996), with polyethylene glycol (molecular weight >1500) as polymeric modifier, 0.5 ~ 5h is reacted, 3, though the reduced rate of 4-BaP reaches 90% at 160 DEG C, but the amount of polymers that the method needs is up to 30%, and cost is high; (autumn civilian polymeric reagent to reduce in coal tar pitch 3 to Chinese scholar, the research of 4-BaP, Coal Chemical Industry, 2007(1), 58-60) add the coumarone-indene resin of 4% in coal tar pitch, 3,4-BaP removal efficiency reaches 46.78%, but the method is limited to removing of 3,4-BaP, does not reach coal tar pitch and to build the road the requirement of permit standard.
From above, also do not have efficient at present and meet the technology of suitability for industrialized production.
Summary of the invention
The present invention is intended to overcome prior art defect, object is to provide that a kind of cost is low, reaction temperature is low, modifier consumption is few, solvent is recyclable and the preparation method of the simple environment-friendly modified coal tar pitch of technique, the content of 3,4-BaPs in the modified coal pitch prepared by the method can effectively be reduced.
For achieving the above object, the concrete steps of the technical solution used in the present invention are:
Step one, the coal tar pitch of 20 ~ 30 parts of quality is inserted in the reactor with reflux, then under 70 ~ 90 DEG C and mixing speed are 80 ~ 100r/min condition, the mixed solvent of 67 ~ 77 parts of quality is added in described reactor, stir 10min, at identical temperature and mixing speed condition, add the modifier of 2.6 ~ 3.2 parts of quality and the sulfuric acid of 0.20 ~ 0.32 part of quality more successively, stir 1 ~ 5h, obtain coal tar pitch mixture.
Step 2, by step one gained coal tar pitch mixture under 100 ~ 110 DEG C of conditions, vacuum distillation recovered solvent, obtained environment-friendly modified coal tar pitch.
The particle diameter of described coal tar pitch is 50 ~ 60 orders, and coal tar pitch is medium temperature coal pitch or low temperature coal tar pitch; Wherein: the softening point of medium temperature coal pitch is 75 ~ 95 DEG C, the softening point of low temperature coal tar pitch is 45 ~ 75 DEG C.
Described mixed solvent is the mixed solvent of cyclohexane and toluene or the mixed solvent for cyclohexane and butyl acetate; Wherein: the mass ratio of cyclohexane and toluene is 1:(0.45 ~ 0.65), the mass ratio of cyclohexane and butyl acetate is 1:(0.45 ~ 0.65).
Described modifier is benzoyl oxide or is maleic anhydride.
Owing to adopting technique scheme, the present invention compared with prior art tool has the following advantages:
1, the present invention adopts conventional reactor, and mixing speed is 80 ~ 100r/min, reacts under 70 ~ 90 DEG C of conditions, and modifier consumption is 10 ~ 13% of coal tar pitch consumption, adopts vacuum distillation recovered solvent.Therefore technique is simple, modifier consumption is few, and reaction temperature is low, and cost is low.
2, coal tar pitch is a kind of very complicated compound, polycyclic aromatic hydrocarbon is wherein as indenes, acenaphthene, pyrene, anthracene etc. and 3, 4-BaP has similar chemical constitution, when under usual conditions, coal tar pitch and polymer modifiers react, these polycyclic aromatic hydrocarbons all can react with modifier, and it is actual in 3, the amount of 4-BaP reaction is few, thus cause 3, 4-BaP reduced rate is little, to increase 3, the reduced rate of 4-BaP, not only to strengthen modifier consumption, and modified coal tar pitch molecular structure changes, molecular weight also can increase, thus cause coal tar pitch soften point to raise, performance changes, constrain the actual use of coal tar pitch.
The mixed solvent that the present invention adopts can be selective by the carcinogenic polycyclic aromatic hydrocarbon 3 in coal tar pitch, 4-BaP dissolves, and react with coal tar pitch under modifier and catalyst action, generate harmless polycyclic compound, under the condition not changing coal tar pitch character, reach the object of 3,4-BaPs in selective reduction coal tar pitch, in coal tar pitch, the reduced rate of 3,4-BaPs is more than 90%.
Therefore, the present invention has the advantages that technique is simple, reaction temperature is low, modifier consumption is few, solvent is recyclable, cost is low and effectively can reduce polycyclic aromatic hydrocarbon 3,4-BaP content in coal tar pitch.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the invention will be further described, the restriction not to protection domain:
For avoiding repetition, this detailed description of the invention by the important technological parameters of involved raw material or preparation method's Unify legislation, repeats no more in each embodiment:
The particle diameter of medium temperature coal pitch and low temperature coal tar pitch is 50 ~ 60 orders; Wherein: the softening point of medium temperature coal pitch is 75 ~ 95 DEG C, the softening point of low temperature coal tar pitch is 45 ~ 75 DEG C.
In the mixed solvent of cyclohexane and toluene: the mass ratio of cyclohexane and toluene is 1:(0.45 ~ 0.65);
In the mixed solvent of cyclohexane and butyl acetate: the mass ratio of cyclohexane and butyl acetate is 1:(0.45 ~ 0.65).
embodiment 1
A kind of environment-friendly modified coal tar pitch and preparation method thereof, the concrete steps of the method are:
The coal tar pitch of 20 ~ 25 parts of quality is inserted in the reactor with reflux, then under 70 ~ 90 DEG C and mixing speed are 80 ~ 100r/min condition, the mixed solvent of 72 ~ 77 parts of quality is added in described reactor, stir 10min, at identical temperature and mixing speed condition, add the modifier of 2.6 ~ 3.2 parts of quality and the sulfuric acid of 0.20 ~ 0.32 part of quality more successively, stir 1 ~ 5h, obtain coal tar pitch mixture.
Step 2, by step one gained coal tar pitch mixture under 100 ~ 110 DEG C of conditions, vacuum distillation recovered solvent, obtained environment-friendly modified coal tar pitch.
In the present embodiment: coal tar pitch is medium temperature coal pitch; Mixed solvent is the mixed solvent of cyclohexane and toluene; Modifier is maleic anhydride.
embodiment 2
A kind of environment-friendly modified coal tar pitch and preparation method thereof, except following technical parameter, all the other are with embodiment 1:
In the present embodiment: coal tar pitch is low temperature coal tar pitch; Modifier is benzoyl oxide.
embodiment 3
A kind of environment-friendly modified coal tar pitch and preparation method thereof, except following technical parameter, all the other are with embodiment 1:
In the present embodiment: mixed solvent is the mixed solvent of cyclohexane and butyl acetate; Modifier is benzoyl oxide.
embodiment 4
A kind of environment-friendly modified coal tar pitch and preparation method thereof, except following technical parameter, all the other are with embodiment 1:
In the present embodiment: coal tar pitch is low temperature coal tar pitch; Mixed solvent is the mixed solvent of cyclohexane and butyl acetate.
embodiment 5
A kind of environment-friendly modified coal tar pitch and preparation method thereof, the concrete steps of the method are:
The coal tar pitch of 25 ~ 30 parts of quality is inserted in the reactor with reflux, then under 70 ~ 90 DEG C and mixing speed are 80 ~ 100r/min condition, the mixed solvent of 67 ~ 72 parts of quality is added in described reactor, stir 10min, at identical temperature and mixing speed condition, add the modifier of 2.6 ~ 3.2 parts of quality and the sulfuric acid of 0.20 ~ 0.32 part of quality more successively, stir 1 ~ 5h, obtain coal tar pitch mixture.
Step 2, by step one gained coal tar pitch mixture under 100 ~ 110 DEG C of conditions, vacuum distillation recovered solvent, obtained environment-friendly modified coal tar pitch.
In the present embodiment: coal tar pitch is medium temperature coal pitch; Mixed solvent is the mixed solvent of cyclohexane and toluene; Modifier is maleic anhydride.
embodiment 6
A kind of environment-friendly modified coal tar pitch and preparation method thereof, except following technical parameter, all the other are with embodiment 5:
In the present embodiment: coal tar pitch is low temperature coal tar pitch; Modifier is benzoyl oxide.
embodiment 7
A kind of environment-friendly modified coal tar pitch and preparation method thereof, except following technical parameter, all the other are with embodiment 5:
In the present embodiment: mixed solvent is the mixed solvent of cyclohexane and butyl acetate; Modifier is benzoyl oxide.
embodiment 8
A kind of environment-friendly modified coal tar pitch and preparation method thereof, except following technical parameter, all the other are with embodiment 5:
In the present embodiment: coal tar pitch is low temperature coal tar pitch; Mixed solvent is the mixed solvent of cyclohexane and butyl acetate.
This detailed description of the invention compared with prior art tool has the following advantages:
1, this detailed description of the invention adopts conventional reactor, and mixing speed is 80 ~ 100r/min, reacts under 70 ~ 90 DEG C of conditions, and modifier consumption is 10 ~ 13% of coal tar pitch consumption, adopts vacuum distillation recovered solvent.Therefore technique is simple, modifier consumption is few, and reaction temperature is low, and cost is low.
2, coal tar pitch is a kind of very complicated compound, polycyclic aromatic hydrocarbon is wherein as indenes, acenaphthene, pyrene, anthracene etc. and 3, 4-BaP has similar chemical constitution, when under usual conditions, coal tar pitch and polymer modifiers react, these polycyclic aromatic hydrocarbons all can react with modifier, and it is actual in 3, the amount of 4-BaP reaction is few, thus cause 3, 4-BaP reduced rate is little, to increase 3, the reduced rate of 4-BaP, not only to strengthen modifier consumption, and modified coal tar pitch molecular structure changes, molecular weight also can increase, thus cause coal tar pitch soften point to raise, performance changes, constrain the actual use of coal tar pitch.
The mixed solvent that this detailed description of the invention adopts can be selective by the carcinogenic polycyclic aromatic hydrocarbon 3 in coal tar pitch, 4-BaP dissolves, and react with coal tar pitch under modifier and catalyst action, generate harmless polycyclic compound, under the condition not changing coal tar pitch character, reach the object of 3,4-BaPs in selective reduction coal tar pitch, in coal tar pitch, the reduced rate of 3,4-BaPs is more than 90%.
Therefore, this detailed description of the invention has the advantages that technique is simple, reaction temperature is low, modifier consumption is few, solvent is recyclable, cost is low and effectively can reduce polycyclic aromatic hydrocarbon 3,4-BaP content in coal tar pitch.
Claims (3)
1. a preparation method for environment-friendly modified coal tar pitch, is characterized in that described preparation method is:
Step one, the coal tar pitch of 20 ~ 30 parts of quality is inserted in the reactor with reflux, then under 70 ~ 90 DEG C and mixing speed are 80 ~ 100r/min condition, the mixed solvent of 67 ~ 77 parts of quality is added in described reactor, stir 10min, at identical temperature and mixing speed condition, add the modifier of 2.6 ~ 3.2 parts of quality and the sulfuric acid of 0.20 ~ 0.32 part of quality more successively, stir 1 ~ 5h, obtain coal tar pitch mixture;
Step 2, by step one gained coal tar pitch mixture under 100 ~ 110 DEG C of conditions, vacuum distillation recovered solvent, obtained environment-friendly modified coal tar pitch;
Described mixed solvent is the mixed solvent of cyclohexane and toluene or the mixed solvent for cyclohexane and butyl acetate; Wherein: the mass ratio of cyclohexane and toluene is 1:(0.45 ~ 0.65), the mass ratio of cyclohexane and butyl acetate is 1:(0.45 ~ 0.65);
Described modifier is benzoyl oxide or is maleic anhydride.
2. the preparation method of environment-friendly modified coal tar pitch according to claim 1, is characterized in that the particle diameter of described coal tar pitch is 50 ~ 60 orders, and coal tar pitch is medium temperature coal pitch or low temperature coal tar pitch; Wherein: the softening point of medium temperature coal pitch is 75 ~ 95 DEG C, the softening point of low temperature coal tar pitch is 45 ~ 75 DEG C.
3. an environment-friendly modified coal tar pitch, is characterized in that described environment-friendly modified coal tar pitch is the environment-friendly modified coal tar pitch prepared by preparation method of the environment-friendly modified coal tar pitch according to any one of claim 1 ~ 2.
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| CN201410110270.8A CN103834421B (en) | 2014-03-24 | 2014-03-24 | Environment-friendly type modified coal asphalt and preparation method thereof |
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| CN201410110270.8A CN103834421B (en) | 2014-03-24 | 2014-03-24 | Environment-friendly type modified coal asphalt and preparation method thereof |
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| CN103834421B true CN103834421B (en) | 2015-04-29 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104403681A (en) * | 2014-11-26 | 2015-03-11 | 辽宁石油化工大学 | Method for extracting benzopyrene from coal pitch |
| CN105238429B (en) * | 2015-10-19 | 2017-10-24 | 太原理工大学 | A kind of preparation method built the road with low toxicity modified coal pitch |
| CN107474865B (en) * | 2017-08-29 | 2020-06-26 | 北京化工大学 | Modification treatment process for asphalt |
| FR3101256B1 (en) * | 2019-09-26 | 2021-11-12 | Safran Ceram | Treatment process for an oil loaded with PAH |
| CN112126238A (en) * | 2020-09-25 | 2020-12-25 | 北京紫瑞天成科技有限公司 | Asphalt mixture modifier prepared from coal tar and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1339556A (en) * | 2000-08-18 | 2002-03-13 | 中国石油化工股份有限公司 | Storage stable modified asphalt and its preparing mehtod |
| CN1346867A (en) * | 2000-10-08 | 2002-05-01 | 青海省安宁改性沥青厂 | Process for preparing polymer modified asphalt by solvent method |
| CN101717654A (en) * | 2009-11-25 | 2010-06-02 | 福州大学 | Method for preparing carbon material high-performance impregnant |
| CN103450694A (en) * | 2013-09-22 | 2013-12-18 | 交通运输部公路科学研究所 | Coal-based and petroleum-based mixed pitch and preparing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03263489A (en) * | 1990-03-14 | 1991-11-22 | Kawasaki Steel Corp | Separation of heavy component in coal tar pitch |
| CN102492302B (en) * | 2011-12-07 | 2014-04-23 | 山东科技大学 | Modified asphalt, and preparation method and use thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1339556A (en) * | 2000-08-18 | 2002-03-13 | 中国石油化工股份有限公司 | Storage stable modified asphalt and its preparing mehtod |
| CN1346867A (en) * | 2000-10-08 | 2002-05-01 | 青海省安宁改性沥青厂 | Process for preparing polymer modified asphalt by solvent method |
| CN101717654A (en) * | 2009-11-25 | 2010-06-02 | 福州大学 | Method for preparing carbon material high-performance impregnant |
| CN103450694A (en) * | 2013-09-22 | 2013-12-18 | 交通运输部公路科学研究所 | Coal-based and petroleum-based mixed pitch and preparing method thereof |
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Effective date of registration: 20201221 Address after: 224300 Xinxing Industrial Park, CHANGDANG Town, Sheyang County, Yancheng City, Jiangsu Province Patentee after: YANCHENG JIEJING TECHNOLOGY Co.,Ltd. Address before: 430081 construction of Qingshan District, Hubei, Wuhan Patentee before: WUHAN University OF SCIENCE AND TECHNOLOGY |
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Granted publication date: 20150429 |