CN104446154A - Extraction processing technology of modified asphalt - Google Patents
Extraction processing technology of modified asphalt Download PDFInfo
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- CN104446154A CN104446154A CN201310433072.0A CN201310433072A CN104446154A CN 104446154 A CN104446154 A CN 104446154A CN 201310433072 A CN201310433072 A CN 201310433072A CN 104446154 A CN104446154 A CN 104446154A
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- mixing
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Abstract
The invention discloses an extraction processing technology of modified asphalt, and relates to the technical field of mechanical chemical engineering. The extraction processing technology is used to prepare environment-friendly asphalt with heat-insulation performance, fireproof performance, low viscosity, high purity and strong adhesive force through extraction, purification, oxidation, modification, solubilization and other processes. Concretely, the technology comprises: adding purified asphalt into a reaction kettle, heating to 300 DEG C, and under the condition of stirring, introducing high-purity air into the reaction kettle for 30 min, so as to prepare oxidized asphalt; successively adding 40 wt% of an aggregate, 20-50 wt% of ethylene-propylene copolymer and 10-40 wt% of SBS rubber into a high-speed shearing grinding machine for grinding, adding the three materials into a pre-mixing kettle and mixing for 30 min, so as to obtain a modified mixing agent; mixing the modified mixing agent with oxidized asphalt, under the conditions of 100 DEG C and stirring, adding 1 wt% of a surfactant, 5 wt% of an emulsifier and deionized water, uniformly mixing, adding 0.2-0.5 wt% of asbestos wool under the conditions of 80 DEG C and stirring, heating to 200 DEG C under the condition of stirring, and reacting for 3-5 h, so as to obtain the modified asphalt.
Description
Technical field
The present invention relates to mechanical chemical industry technology field, particularly relate to a kind of extraction complete processing of modifying asphalt.
Background technology
The chocolate complex mixture that pitch is made up of hydrocarbon polymer and the nonmetal derivative thereof of different molecular weight, be in a liquid state, it is a kind of waterproof and dampproof and rot-resistant organic gel gel material, for coating, plastics, the industry such as rubber and surfacing etc., in civil engineering work, pitch is widely used water-proof material and impregnating material, be mainly used in roofing, ground, the waterproof of underground structure, timber, steel anticorrosion, widely used pavement structure consolidating material in pitch or road engineering, it can build up the bituminous pavement of different structure after proportioning from the mineral material of different composition, modifying asphalt is admixture rubber, resin, high molecular polymer, the additives (properties-correcting agent) such as levigate rubber powder or other fillers, or take measures such as pitch mild oxidation processing, the performance of pitch or asphalt is improved the asphaltic binder made, its mechanism of modifying asphalt has two kinds, one is change pitch chemical constitution, two is properties-correcting agent is uniformly distributed in pitch form certain spacial framework, if the patent No. is that 201110460035.X discloses a kind of tar production technique and the device of producing low ash pitch, belong to tar production technical field, its technique is: raw tar enters dehydration tower after fraction overhead oil gas heat exchanger and condensate cooler heat exchange, moisture and light oil is removed in dehydration tower, anhydrous tar at the bottom of dehydration tower enters primary tower after heating, primary tower bottoms is mid-temperature pitch, primary tower side take-off anthracene oil cut, primary tower tower top distillate gas enters cut tower, overhead extraction tri-mixed fractions, it is a carbolineum cut at the bottom of tower, cut tower adopts underpressure distillation, adopt the present invention, the high-quality low-ash pitch without Na+ salt can be produced, added value of product is high.Technique is simple, reduces energy consumption, but it is large to obtain a kind of tensile strength, can heat-insulating, fire-preventing, and viscosity is low, and purity is high, the environmentally-friendly asphalt of strong adhesion.
Summary of the invention
For overcoming the deficiency in prior art, the object of the invention is to provide a kind of extraction complete processing of modifying asphalt.
For realizing object of the present invention, technical scheme of the present invention is as follows:
An extraction complete processing for modifying asphalt, described complete processing comprises the steps:
(1) crude oil is removed moisture at the bottom of dehydration tower, send into the cut tower be connected with primary tower through tubular oven, can extraction mid-temperature pitch from primary tower, wherein, dehydration column overhead temperature is 80-110 DEG C, and mid-temperature pitch extraction temperature is 330-350 DEG C, and cut column overhead absolute pressure is 40kPa;
(2) in gained mid-temperature pitch, add the NaOH aqueous solution, filter, much filtrate is the purifying pitch of decoking oleic acid;
(3) above-mentioned gained purifying pitch is added in reactor, be heated to 300 DEG C, under agitation, in reactor, pass into rich air, 30min, obtained oxidized bitumen;
(4) in high shear grinding machine, add 40wt% aggregate successively, 20-50wt% polyethylene-polypropylene multipolymer and 10-40wt%SBS rubber, after grinding, three joined in pre-mixing still, mixing 30min, obtains modification mixture;
(5) the modification mixture obtained in step (4) being joined temperature is down in the oxidized bitumen of 150-180 DEG C, stirs 10min to mixing, and obtain mixing homogenate, wherein the volume ratio of modification mixture and oxidized bitumen is 2:5;
(6) in step (5), under 100 DEG C of agitation conditions, 1wt% tensio-active agent, 5wt% emulsifying agent and deionized water is added in mixing homogenate, after mixing, 0.2-0.5wt% asbestos wool is added again at 80 DEG C of agitation conditions, 200 DEG C are heated to again under agitation condition, reaction 3-5h, namely obtains modifying asphalt.
The extraction complete processing of above-mentioned a kind of modifying asphalt, wherein, in the fraction overhead of step (1), gac is placed on the reactor top in step (2) and (3).
The extraction complete processing of above-mentioned a kind of modifying asphalt, wherein, can add appropriate croci in step (6).
The extraction complete processing of above-mentioned a kind of modifying asphalt, wherein, described in step (6), tensio-active agent is Sodium dodecylbenzene sulfonate.
The extraction complete processing of above-mentioned a kind of modifying asphalt, wherein, described in step (6), emulsifying agent is sylvic acid or lipid acid.
Beneficial effect of the present invention: structure proportion is reasonable, technique is simple, can produce in enormous quantities, by crude oil after treatment, after being further purified, reoxidize obtained oxidized bitumen, strengthen the resistance of oxidation of self, in modified mixture, the interpolation of polyethylene-polypropylene multipolymer can strengthen pitch intensity, increase pitch sticking power, SBS rubber can reduce asphalt viscosity, be convenient to pitch better mix with modified mixture, better modified effect is had to pitch, tensio-active agent and emulsifying agent is added in pitch, reduce the dispersion resistance of pitch, colas can be obtained, this newborn emulsion liquid is dried to one and has the film reducing viscosity, select resin acid to do generation that emulsifying agent can reduce airborne dust, asbestos wool has good tensile strength and good thermal insulation and non-corrosibility, nonflammable, pitch tensile strength can be strengthened, can heat-insulating, fire-preventing, gac is placed in fraction overhead and reactor top, the toxic gas that absorbing high temp reaction produces, protection of the environment, add appropriate croci, pitch color can be regulated.
Embodiment
The technique means realized for making the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with embodiment, setting forth the present invention further.
embodiment 1:
An extraction complete processing for modifying asphalt, described complete processing comprises the steps:
(1) crude oil is removed moisture at the bottom of dehydration tower, the cut tower be connected with primary tower is sent into through tubular oven, can extraction mid-temperature pitch from primary tower, wherein, dehydration column overhead temperature is 100 DEG C, and mid-temperature pitch extraction temperature is 330 DEG C, and cut column overhead absolute pressure is 40kPa, wherein, fraction overhead places gac;
(2) in gained mid-temperature pitch, add the NaOH aqueous solution, filter, much filtrate is the purifying pitch of decoking oleic acid;
(3) above-mentioned gained purifying pitch is added in reactor, be heated to 300 DEG C, under agitation, rich air is passed in reactor, 30min, obtained oxidized bitumen, wherein gac is placed on reactor top, by crude oil after treatment, after being further purified, reoxidize obtained oxidized bitumen, strengthen the resistance of oxidation of self, gac is placed, the toxic gas that absorbing high temp reaction produces in fraction overhead and reactor top;
(4) in high shear grinding machine, 40wt% aggregate is added successively, 40wt% polyethylene-polypropylene multipolymer and 20wt%SBS rubber, after grinding, three is joined in pre-mixing still, mixing 30min, obtain modification mixture, in modified mixture, the interpolation of polyethylene-polypropylene multipolymer can strengthen pitch intensity, and increase pitch sticking power, SBS rubber can reduce asphalt viscosity, be convenient to pitch better mix with modified mixture, have better modified effect to pitch;
(5) the modification mixture obtained in step (4) being joined temperature is down in the oxidized bitumen of 180 DEG C, stirs 10min to mixing, and obtain mixing homogenate, wherein the volume ratio of modification mixture and oxidized bitumen is 2:5;
(6) in step (5), under 100 DEG C of agitation conditions, 1wt% Sodium dodecylbenzene sulfonate is added in mixing homogenate, 5wt% sylvic acid and deionized water, after mixing, the croci of 0.5wt% asbestos wool and 0.1% is added again at 80 DEG C of agitation conditions, 200 DEG C are heated to again under agitation condition, reaction 5h, namely modifying asphalt is obtained, tensio-active agent and emulsifying agent is added in pitch, reduce the dispersion resistance of pitch, colas can be obtained, this newborn emulsion liquid is dried to one and has the film reducing viscosity, select resin acid to do generation that emulsifying agent can reduce airborne dust, asbestos wool has good tensile strength and good thermal insulation and non-corrosibility, nonflammable, pitch tensile strength can be strengthened, can heat-insulating, fire-preventing, protection of the environment, add appropriate croci, pitch color can be regulated.
embodiment 2:all the other are identical with described embodiment 1, difference is, in step (1), dehydration column overhead temperature is 110 DEG C, 20wt% polyethylene-polypropylene multipolymer and 40wt%SBS rubber is contained in modification mixture in step (4), modification mixture is added when oxidized bitumen temperature is down to 150 DEG C in step (5), using lipid acid instead in step (6) is emulsifying agent, adds 0.2wt% asbestos wool, reaction 3h.
embodiment 3:all the other are identical with described embodiment 1, difference is, in step (1), dehydration column overhead temperature is 80 DEG C, 30wt% polyethylene-polypropylene multipolymer and 30wt%SBS rubber is contained in modification mixture in step (4), modification mixture is added when oxidized bitumen temperature is down to 165 DEG C in step (5), using lipid acid instead in step (6) is emulsifying agent, adds 0.4wt% asbestos wool, reaction 4h.
In above-mentioned three embodiments, obtained pitch carries out oxidation accelerated test, within 3 months, occur fading, just there is disintegration after half a year, strengthen 3 times, under 500 DEG C of conditions than not modifying asphalt resistance of oxidation, melting is there is after 3h, 1h stronger than plain asphalt thermotolerance, and after melting, the volume ratio plain asphalt covered on wheel is few.
In the extraction complete processing of this pitch, structure proportion is reasonable, technique is simple, can produce in enormous quantities, by crude oil after treatment, after being further purified, reoxidize obtained oxidized bitumen, strengthen the resistance of oxidation of self, in modified mixture, the interpolation of polyethylene-polypropylene multipolymer can strengthen pitch intensity, increase pitch sticking power, SBS rubber can reduce asphalt viscosity, be convenient to pitch better mix with modified mixture, better modified effect is had to pitch, tensio-active agent and emulsifying agent is added in pitch, reduce the dispersion resistance of pitch, colas can be obtained, this newborn emulsion liquid is dried to one and has the film reducing viscosity, select resin acid to do generation that emulsifying agent can reduce airborne dust, asbestos wool has good tensile strength and good thermal insulation and non-corrosibility, nonflammable, pitch tensile strength can be strengthened, can heat-insulating, fire-preventing, gac is placed in fraction overhead and reactor top, the toxic gas that absorbing high temp reaction produces, protection of the environment, add appropriate croci, pitch color can be regulated.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize specification sheets of the present invention to do equivalent structure or the conversion of equivalent flow process, or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (5)
1. an extraction complete processing for modifying asphalt, is characterized in that, described complete processing comprises the steps:
(1) crude oil is removed moisture at the bottom of dehydration tower, send into the cut tower be connected with primary tower through tubular oven, can extraction mid-temperature pitch from primary tower, wherein, dehydration column overhead temperature is 80-110 DEG C, and mid-temperature pitch extraction temperature is 330-350 DEG C, and cut column overhead absolute pressure is 40kPa;
(2) in gained mid-temperature pitch, add the NaOH aqueous solution, filter, much filtrate is the purifying pitch of decoking oleic acid;
(3) above-mentioned gained purifying pitch is added in reactor, be heated to 300 DEG C, under agitation, in reactor, pass into rich air, 30min, obtained oxidized bitumen;
(4) in high shear grinding machine, add 40wt% aggregate successively, 20-50wt% polyethylene-polypropylene multipolymer and 10-40wt%SBS rubber, after grinding, three joined in pre-mixing still, mixing 30min, obtains modification mixture;
(5) the modification mixture obtained in step (4) being joined temperature is down in the oxidized bitumen of 150-180 DEG C, stirs 10min to mixing, and obtain mixing homogenate, wherein the volume ratio of modification mixture and oxidized bitumen is 2:5;
(6) in step (5), under 100 DEG C of agitation conditions, 1wt% tensio-active agent, 5wt% emulsifying agent and deionized water is added in mixing homogenate, after mixing, 0.2-0.5wt% asbestos wool is added again at 80 DEG C of agitation conditions, 200 DEG C are heated to again under agitation condition, reaction 3-5h, namely obtains modifying asphalt.
2. the extraction complete processing of a kind of modifying asphalt according to claim 1, is characterized in that, in the fraction overhead of step (1), gac is placed on the reactor top in step (2) and (3).
3. the extraction complete processing of a kind of modifying asphalt according to claim 1, is characterized in that, can add appropriate croci in step (6).
4. the extraction complete processing of a kind of modifying asphalt according to claim 1, is characterized in that, described in step (6), tensio-active agent is Sodium dodecylbenzene sulfonate.
5. the extraction complete processing of a kind of modifying asphalt according to claim 1, is characterized in that, described in step (6), emulsifying agent is sylvic acid or lipid acid.
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| CN201310433072.0A CN104446154A (en) | 2013-09-23 | 2013-09-23 | Extraction processing technology of modified asphalt |
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| CN201310433072.0A CN104446154A (en) | 2013-09-23 | 2013-09-23 | Extraction processing technology of modified asphalt |
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| CN104446154A true CN104446154A (en) | 2015-03-25 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109836834A (en) * | 2019-01-24 | 2019-06-04 | 苏州拓博琳新材料科技有限公司 | Emulsifier, emulsifier preparation method, fire-retardant emulsified asphalt and preparation method thereof |
| CN112111167A (en) * | 2020-10-10 | 2020-12-22 | 劳国辉 | Preparation method of modified asphalt |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101386498A (en) * | 2008-10-14 | 2009-03-18 | 湖南省公路学会 | Method for preparing gelatine powder dual-composite modified asphalt |
| CN101654347A (en) * | 2009-08-07 | 2010-02-24 | 江苏省交通科学研究院股份有限公司 | Hot in-plant reclaimed asphalt mixture |
| CN103184061A (en) * | 2011-12-30 | 2013-07-03 | 鞍钢集团工程技术有限公司 | Tar processing technology for producing low-ash pitch and device |
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2013
- 2013-09-23 CN CN201310433072.0A patent/CN104446154A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101386498A (en) * | 2008-10-14 | 2009-03-18 | 湖南省公路学会 | Method for preparing gelatine powder dual-composite modified asphalt |
| CN101654347A (en) * | 2009-08-07 | 2010-02-24 | 江苏省交通科学研究院股份有限公司 | Hot in-plant reclaimed asphalt mixture |
| CN103184061A (en) * | 2011-12-30 | 2013-07-03 | 鞍钢集团工程技术有限公司 | Tar processing technology for producing low-ash pitch and device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109836834A (en) * | 2019-01-24 | 2019-06-04 | 苏州拓博琳新材料科技有限公司 | Emulsifier, emulsifier preparation method, fire-retardant emulsified asphalt and preparation method thereof |
| CN112111167A (en) * | 2020-10-10 | 2020-12-22 | 劳国辉 | Preparation method of modified asphalt |
| CN112111167B (en) * | 2020-10-10 | 2021-12-31 | 临沂朕玮建材有限公司 | Preparation method of modified asphalt |
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Application publication date: 20150325 |