CN102504854A - Method of producing modified asphalt - Google Patents
Method of producing modified asphalt Download PDFInfo
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- CN102504854A CN102504854A CN2011103933948A CN201110393394A CN102504854A CN 102504854 A CN102504854 A CN 102504854A CN 2011103933948 A CN2011103933948 A CN 2011103933948A CN 201110393394 A CN201110393394 A CN 201110393394A CN 102504854 A CN102504854 A CN 102504854A
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- modifying asphalt
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Abstract
A method of producing modified asphalt is characterized in that in a temperature range of from room temperature to 100 DEG C, organic solvent and/or mixed solvent oil capable of dispersing or dissolving coal liquefied heavy products and matrix asphalt are used for mixing the coal liquefied heavy products with the matrix asphalt prior to separation and recycling of the solvent so as to obtain the modified asphalt, wherein the coal liquefied heavy products added account for 5-50% of total percentage of the modified asphalt. The method has the advantage that the production temperature is low, and the modified asphalt has good performances.
Description
Technical field
The present invention relates to a kind of method for preparing modifying asphalt.
Background technology
Because bituminous pavement has characteristics such as good road-ability, excellent use properties, construction speed be fast, easy to maintenance, motorway more than 90% and Class I highway all adopt bituminous pavement.Pitch requires do not trickle summer as the bituminous pavement agglutinate, and do not ftracture winter.
Along with high development of social economy, to the also constantly increase of requirement of bituminous pavement.Single bi tumenf orr oad has been difficult to bear the traction engine flow that constantly increases progressively, has influenced the work-ing life on road surface.The use of high performance modified bitumen is the developing direction that highroad is built.
Trinida lake pitch (TLA) has obtained insider's generally approval as a kind of good Imported Asphalt properties-correcting agent.Many developed countries are used for the higher road surface of specification of quality with the TLA modifying asphalt, and some countries (like the U.S., Britain and China) have formulated special standard-required to the TLA modifying asphalt.The a lot of important engineerings of China have all been used the TLA modifying asphalt like Beijing airfield runway, the 2nd ring road in Beijing, Chengdu-Chongqing expressway, Jiangyin Yangtze Bridge etc., and result of use is significantly improved than plain asphalt.But because the TLA source is single, price is higher, and use range is restricted.There are some researches show that gelatin liquefaction heavy product and bi tumenf orr oad modulation can prepare the high-quality modifying asphalt that satisfies TLA modifying asphalt relevant criterion.
The gelatin liquefaction heavy product comprises coal hydrogenation liquefaction heavy products such as kerosene co-processing heavy product, coal directly-liquefied residue.Coal is under the condition that solvent (as: circulating solvent, petroleum residual oil, catalytically cracked oil), catalyzer and high pressure hydrogen exist, and 400 ℃ of left and right sides hydrogenation liquefactions, product are gas mixture, liquefaction oil, liquefaction heavy product.Its liquefaction heavy product productive rate is 20-70%, looks processing condition and different.The addition of gelatin liquefaction heavy product in bi tumenf orr oad is 5-50%.
Chinese patent ZL02158702.7 and one Chinese patent application 200810222273.5 disclose a kind of kerosene co-processing heavy product modified asphalt preparation method; Kerosene co-processing heavy product is ground to certain particle size; With the ratio of 10-40%,, mix with petroleum pitch at 160-220 ℃.Chinese patent ZL200610012547.9 discloses a kind of coal directly-liquefied residue modified asphalt preparation method, and coal directly-liquefied residue is ground to below 100 orders, with the ratio of 5-30%, at 100-250 ℃, mixes with petroleum pitch.Chinese patent ZL200710178082.9 discloses the coal directly-liquefied residue modified asphalt preparation method; With the coal directly-liquefied residue (150-280 ℃) of molten state and the petroleum pitch (100-180 ℃) of molten state; With the ratio of 3-40%, mix down at 150-280 ℃.
Above-mentioned gelatin liquefaction heavy product modified asphalt preparation method needs to accomplish mixing process 100-280 ℃ of TR, also needs certain mixing time simultaneously, so that make gelatin liquefaction heavy product and petroleum pitch (matrix pitch) obtain mixing resultant preferably.But so hot mixing process is difficult to avoid to a certain extent aging of matrix pitch, thereby influences the performance of modifying asphalt.Also power consumption, time-consuming simultaneously.In addition, grind coal liquefaction heavy product, also power consumption, time-consuming.Though the source of molten state gelatin liquefaction heavy product can directly be obtained by the DCL/Direct coal liquefaction process, limited to the geographical position of modifying asphalt preparation.
Summary of the invention
It is low to the purpose of this invention is to provide a kind of preparation temperature, and what performance of modified bitumen was good prepares the method for modifying asphalt with the gelatin liquefaction heavy product.
Method provided by the present invention is following:
In room temperature to 100 ℃ scope; Use organic solvent and/or mixed solvent oil that gelatin liquefaction heavy product and matrix pitch are all had the ability of dispersing or dissolving; Gelatin liquefaction heavy product and matrix pitch are mixed; Separate, reclaim solvent then, can obtain modifying asphalt, wherein to account for the weight percent of modifying asphalt be 5-50% to the addition of gelatin liquefaction heavy product.
In the method for the invention; Said gelatin liquefaction heavy product is the heavy product that coal hydrogenation liquefaction process such as kerosene co-processing process (coal and petroleum residual oil or catalytically cracked oil co-processing), DCL/Direct coal liquefaction process produce; Wherein the content of toluene solvend is 20-60%; Toluene insoluble THF solubles content is 0-40%, and the content of toluene insoluble tetrahydrofuran insoluble is 10-50%.
In the method for the invention, said matrix pitch is a petroleum pitch.
In the method for the invention, used organic solvent can be alkanes, heterocyclic, halogenated hydrocarbon, arene or contain in the oxygen class organic solvent one or more.
Alkanes organic solvent according to the invention can be one or more in normal hexane, hexanaphthene or the normal heptane etc.
Heterocyclic organic solvent according to the invention can be one or more in thiophene, THF or the pyridine etc.
Halogenated hydrocarbon organic solvent according to the invention can be one or more in methylene dichloride, trichloromethane, trieline or the N-PROPYLE BROMIDE etc.
Arene organic solvent according to the invention can be one or more in benzene, toluene or the ethylbenzene etc.
The oxygen organic solvent that contains according to the invention can be in alcohol, ether, ketone or the ester etc. one or more, for example Virahol, acetone, pimelinketone, ETHYLE ACETATE, methyl glycol, glycol monoethyl ether etc.
Mixed solvent oil according to the invention can be one or more in gasoline, kerosene, sherwood oil or the solvent naphtha etc.
In the method for the invention, the gelatin liquefaction heavy product with can adopt following four kinds of modes mixing of matrix pitch:
1, gelatin liquefaction heavy product and matrix pitch are mixed in organic solvent and/or mixed solvent oil simultaneously;
2, with gelatin liquefaction heavy product, matrix pitch respectively with after organic solvent and/or mixed solvent oil mix, remix;
3, with the gelatin liquefaction heavy product with after organic solvent and/or mixed solvent oil mix, mix with matrix pitch again;
4, with matrix pitch with after organic solvent and/or mixed solvent oil mix, mix with the gelatin liquefaction heavy product again.
In the method for the invention, the weight ratio of the solvent of adding and gelatin liquefaction heavy product or matrix pitch is: 0.3-100: 1.
In the method for the invention, the mixing process of gelatin liquefaction heavy product and matrix pitch, heating can be adopted modes such as water-bath, oil bath, sand-bath or direct heating if desired.
In the method for the invention, separate and reclaim dissolving agent process, can adopt air distillation, underpressure distillation or mode such as volatilization naturally.
Among the present invention, the performance of gelatin liquefaction heavy product modified pavement asphalt serves as to estimate foundation with U.S. ASTM D5710-95 to the index request of TLA modifying asphalt.
Advantage of the present invention is:
Gelatin liquefaction heavy product and matrix pitch mix down at low temperature (room temperature-100 ℃) among 1 the present invention; Mixing temperature is starkly lower than the mixing temperature (150-280 ℃) that is adopted among the Chinese patent ZL200710178082.9; Be lower than the mixing temperature (100-250 ℃) that is adopted among the ZL200610012547.9 in the Chinese patent simultaneously, also be lower than the mixing temperature (160-220 ℃) that is adopted in Chinese patent ZL02158702.7 and the one Chinese patent application 200810222273.5.Therefore the method that the present invention adopted can reduce the degree of aging of matrix pitch, shows with the inventive method to obtain similar modifying asphalt (same penetration degree rank), has ductility preferably than other method gained modifying asphalt;
2 solvent for use of the present invention and solvent oil all have gelatin liquefaction heavy product and matrix pitch and disperse or dissolve ability preferably, so the present invention can realize the effective mixing under the low temperature, and then make modifying asphalt show preferable performance;
3 compare with Chinese patent ZL200610012547.9, one Chinese patent application 200810222273.5 and Chinese patent ZL02158702.7, need not the gelatin liquefaction heavy product is ground to specific dimensions, have saved the crushing process of gelatin liquefaction heavy product;
4 modified effects and TLA are suitable, but the price of gelatin liquefaction heavy product is far below TLA;
The purity requirement of the 5 pairs of solvent for use and solvent oil is not high, easy to be recycled, can too much not increase the production cost of modifying asphalt;
6 use as the road gelatin liquefaction heavy product with material, can realize the efficient utilization of gelatin liquefaction heavy product.
Embodiment
The composition of dissimilar gelatin liquefaction heavy products is seen table 1, and the character of used matrix pitch is seen table 2.
The composition of the gelatin liquefaction heavy product that table 1 is dissimilar
The character of the used matrix pitch of table 2
Embodiment 1
Under 50 ℃; After gelatin liquefaction heavy product R1 fully disperseed with normal hexane (weight ratio of normal hexane and R1 is 100: 1); Weight ratio with 5% (R1 ratio modified asphalt) joins among the matrix pitch J1, mixes, and in 80 ℃ of water-baths, reclaims solvent then; Obtain modifying asphalt, its test result is seen table 3.
Embodiment 2
At room temperature; After gelatin liquefaction heavy product R2 fully disperseed with methylene dichloride (weight ratio of methylene dichloride and R2 is 50: 1); Weight ratio with 10% (R2 ratio modified asphalt) joins with among the abundant dispersive matrix pitch J1 of methylene dichloride (weight ratio of methylene dichloride and matrix pitch J1 is 1: 1), mixes, and in 50 ℃ of water-baths, reclaims solvent then; Obtain modifying asphalt, its test result is seen table 3.
Embodiment 3
Under 60 ℃, after matrix pitch J2 fully disperseed with benzene (weight ratio of benzene and J2 is 1.5: 1), join among the gelatin liquefaction heavy product R3 (weight ratio that R3 accounts for modifying asphalt is 25%); Mix mixing; In 90 ℃ of water-baths, reclaim solvent then, obtain modifying asphalt, its test result is seen table 3.
Embodiment 4
Under 65 ℃; After gelatin liquefaction heavy product R4 fully disperseed with thiophene (weight ratio of thiophene and R4 is 2: 1); Weight ratio with 40% (R4 ratio modified asphalt) joins with among the abundant dispersive matrix pitch J2 of thiophene (weight ratio of thiophene and matrix pitch J2 is 1.5: 1), mixes mixing, in boiling water bath, reclaims solvent then; Obtain modifying asphalt, its test result is seen table 3.
Embodiment 5
Under 45 ℃; After gelatin liquefaction heavy product R4 fully disperseed with solvent naphtha (weight ratio of solvent naphtha and R4 is 0.5: 1); Weight ratio with 40% (R4 ratio modified asphalt) joins with among the abundant dispersive matrix pitch J2 of solvent naphtha (weight ratio of solvent naphtha and matrix pitch is 1: 1), mixes mixing, decompression and solvent recovery in 100 ℃ of oil baths then; Obtain modifying asphalt, its test result is seen table 3.
Embodiment 6
Under 80 ℃; After gelatin liquefaction heavy product R2 fully disperseed with pimelinketone (weight ratio of pimelinketone and R2 is 20: 1); Weight ratio with 10% (R2 ratio modified asphalt) joins with among the abundant dispersive matrix pitch J2 of pimelinketone (weight ratio of pimelinketone and matrix pitch J2 is 1.5: 1), mixes mixing, decompression and solvent recovery in 100 ℃ of oil baths then; Obtain modifying asphalt, its test result is seen table 3.
Embodiment 7
Under 40 ℃; Gelatin liquefaction heavy product R5 and matrix pitch J2 (R5 is 1: 3 with the weight ratio of matrix pitch J2) are joined in ethylbenzene/glycol monoethyl ether mixed solvent (contain 28% ethylbenzene, 53.9 ℃ of azeotropic points, the weight ratio of mixed solvent and matrix pitch J2 is 10: 1); After treating fully to disperse mixing; In 65 ℃ of water-baths, reclaim solvent, obtain modifying asphalt, its test result is seen table 3.
Embodiment 8
Under 69 ℃; Gelatin liquefaction heavy product R5 and matrix pitch J2 (R5 is 1: 3 with the weight ratio of matrix pitch J2) are joined solvent naphtha/gasoline mixed solvent (contain solvent naphtha 90% in the mixed solvent; The weight ratio of mixed solvent and matrix pitch J2 is 2: 1) in, after treating fully to disperse mixing, decompression and solvent recovery in 100 ℃ of oil baths; Obtain modifying asphalt, its test result is seen table 3.
Embodiment 9
Under 90 ℃; Gelatin liquefaction heavy product R2 and matrix pitch J1 (R2 is 1: 9 with the weight ratio of matrix pitch J1) are joined solvent naphtha/toluene mixed solvent (contain solvent naphtha 30% in the mixed solvent; The weight ratio of mixed solvent and matrix pitch J1 is 2: 1) in, after treating fully to disperse mixing, decompression and solvent recovery in 100 ℃ of oil baths; Obtain modifying asphalt, its test result is seen table 3.
Comparative Examples 1
Gelatin liquefaction heavy product R2 is crushed to below 100 orders, and weight ratio with 10% (R2 ratio modified asphalt) and matrix pitch J1 produce modifying asphalt at 180 ℃ of following mixings, and its test result is seen table 3.
Comparative Examples 2
Gelatin liquefaction heavy product R4 is crushed to below 100 orders, and weight ratio with 25% (R4 ratio modified asphalt) and matrix pitch J2 produce modifying asphalt at 180 ℃ of following mixings, and its test result is seen table 3.
Comparative Examples 3
Mix under 200 ℃ joining among the matrix pitch J2 of melting mixing with 25% weight ratio (R4 ratio modified asphalt) behind the gelatin liquefaction heavy product R4 heating and melting.Its test result is seen table 3.
Can find out that from table 3 performance index of the modifying asphalt that embodiment obtains can meet among the U.S. ASTMD5710-95 the requirement of TLA modifying asphalt 40-55 penetration degree level index, but the ductility of the modifying asphalt that Comparative Examples 1,2 and 3 obtains does not meet the demands.
Embodiment compares with Comparative Examples; The method that embodiment adopted is under the help of solvent or solvent oil; Need not to heat up or rising under the condition of low temperature (room temperature-100 ℃); The gelatin liquefaction heavy product is fully disperseed in matrix pitch, mix, this method can make gelatin liquefaction heavy product and matrix pitch under low temperature (room temperature-100 ℃), mix.And the gelatin liquefaction heavy product was realized with mixing under 100-280 ℃ of temperature of matrix pitch in the Comparative Examples.Therefore the method that the present invention adopted can reduce the degree of aging of matrix pitch, shows with the inventive method to obtain similar modifying asphalt (same penetration degree rank), has ductility preferably than other method gained modifying asphalt.This point can be found out from the ductility index of table 3 modifying asphalt.Simultaneously energy-conservation is obvious.
Although herein disclosed is above seven embodiment; But technical scheme of the present invention is not limited to above seven embodiment; Under the situation that does not break away from inventive concept, the change that technical scheme of the present invention is done all will fall into claims of the present invention institute restricted portion.
Claims (15)
1. method for preparing modifying asphalt; It is characterized in that in room temperature to 100 ℃ scope; Use organic solvent and/or mixed solvent oil that gelatin liquefaction heavy product and matrix pitch are all had the ability of dispersing or dissolving, gelatin liquefaction heavy product and matrix pitch are mixed, separate, reclaim solvent then; Can obtain modifying asphalt, wherein to account for the weight percent of modifying asphalt be 5-50% to the addition of gelatin liquefaction heavy product.
2. a kind of method for preparing modifying asphalt as claimed in claim 1; It is characterized in that described gelatin liquefaction heavy product is the heavy product of kerosene co-processing process generation or the heavy product that the coal hydrogenation liquefaction process produces; Wherein the content of toluene solvend is 20-60%; Toluene insoluble THF solubles content is 0-40%, and the content of toluene insoluble tetrahydrofuran insoluble is 10-50%.
3. a kind of method for preparing modifying asphalt as claimed in claim 2 is characterized in that described kerosene co-processing process is coal and petroleum residual oil, or the co-processing of coal and catalytically cracked oil.The coal hydrogenation liquefaction process is the DCL/Direct coal liquefaction process.
4. a kind of method for preparing modifying asphalt as claimed in claim 1 is characterized in that described matrix pitch is a petroleum pitch.
5. a kind of method for preparing modifying asphalt as claimed in claim 1 is characterized in that described organic solvent is alkanes, heterocyclic, halogenated hydrocarbon, arene or contains in the oxygen class organic solvent one or more.
6. a kind of method for preparing modifying asphalt as claimed in claim 5 is characterized in that described alkanes organic solvent is one or more in normal hexane, hexanaphthene or the normal heptane.
7. a kind of method for preparing modifying asphalt as claimed in claim 5 is characterized in that described heterocyclic organic solvent is one or more in thiophene, THF or the pyridine.
8. a kind of method for preparing modifying asphalt as claimed in claim 5 is characterized in that described halogenated hydrocarbon organic solvent is one or more in methylene dichloride, trichloromethane, trieline or the N-PROPYLE BROMIDE.
9. a kind of method for preparing modifying asphalt as claimed in claim 5 is characterized in that described arene organic solvent is one or more in benzene, toluene or the ethylbenzene.
10. a kind of method for preparing modifying asphalt as claimed in claim 1 is characterized in that the described oxygen organic solvent that contains is in alcohol, ether, ketone or the ester one or more.
11. a kind of method for preparing modifying asphalt as claimed in claim 10 is characterized in that described alcohol is that ketone is acetone or pimelinketone like Virahol, ester is an ETHYLE ACETATE, and ether is methyl glycol or glycol monoethyl ether.
12. a kind of method for preparing modifying asphalt as claimed in claim 1 is characterized in that described mixed solvent oil is one or more in gasoline, kerosene, sherwood oil or the solvent naphtha.
13. a kind of method for preparing modifying asphalt as claimed in claim 1 is characterized in that adopting described gelatin liquefaction heavy product and mixing of matrix pitch following four kinds of modes:
Mode 1, gelatin liquefaction heavy product and matrix pitch are mixed in organic solvent and/or mixed solvent oil simultaneously;
Mode 2, with gelatin liquefaction heavy product, matrix pitch respectively with after organic solvent and/or mixed solvent oil mix, remix;
Mode 3, with the gelatin liquefaction heavy product with after organic solvent and/or mixed solvent oil mix, mix with matrix pitch again;
Mode 4, with matrix pitch with after organic solvent and/or mixed solvent oil mix, mix with the gelatin liquefaction heavy product again.
In the method for the invention, the weight ratio of the solvent of adding and gelatin liquefaction heavy product or matrix pitch is: 0.3-100: 1.
14. a kind of method for preparing modifying asphalt as claimed in claim 1 when it is characterized in that also need heating in the mixing process of described gelatin liquefaction heavy product and matrix pitch, adopts water-bath, oil bath, sand-bath or direct-fired mode.
15. a kind of method for preparing modifying asphalt as claimed in claim 1 is characterized in that described separation and reclaims solvent employing air distillation, underpressure distillation or natural evaporable mode.
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Cited By (5)
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| CN103497523A (en) * | 2013-10-22 | 2014-01-08 | 山西省交通科学研究院 | Producing method for coal and oil coprocessing residue modified petroleum asphalt |
| CN103834423A (en) * | 2014-03-24 | 2014-06-04 | 武汉科技大学 | Modified coal tar pitch and preparation method thereof |
| CN104388108A (en) * | 2014-11-03 | 2015-03-04 | 交通运输部公路科学研究所 | Method for preparing catalytically hydrogenated biological asphalt |
| CN107337368A (en) * | 2016-04-29 | 2017-11-10 | 宋学忠 | Cold-application tar pavement asphalt diluent |
| CN109181732A (en) * | 2018-09-30 | 2019-01-11 | 中国科学院山西煤炭化学研究所 | A kind of method that coal tar preparation can spin pitch |
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| CN104388108A (en) * | 2014-11-03 | 2015-03-04 | 交通运输部公路科学研究所 | Method for preparing catalytically hydrogenated biological asphalt |
| CN107337368A (en) * | 2016-04-29 | 2017-11-10 | 宋学忠 | Cold-application tar pavement asphalt diluent |
| CN109181732A (en) * | 2018-09-30 | 2019-01-11 | 中国科学院山西煤炭化学研究所 | A kind of method that coal tar preparation can spin pitch |
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| CN102504854B (en) | 2014-07-09 |
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