CN105419839A - Modified biological asphalt and preparation method therefor - Google Patents
Modified biological asphalt and preparation method therefor Download PDFInfo
- Publication number
- CN105419839A CN105419839A CN201510736933.1A CN201510736933A CN105419839A CN 105419839 A CN105419839 A CN 105419839A CN 201510736933 A CN201510736933 A CN 201510736933A CN 105419839 A CN105419839 A CN 105419839A
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- preparation
- modification biological
- pyrolysis
- biomass
- oil
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Classifications
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10C—WORKING-UP PITCH, ASPHALT, BITUMEN, TAR; PYROLIGNEOUS ACID
- C10C3/00—Working-up pitch, asphalt, bitumen
- C10C3/02—Working-up pitch, asphalt, bitumen by chemical means reaction
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10C—WORKING-UP PITCH, ASPHALT, BITUMEN, TAR; PYROLIGNEOUS ACID
- C10C3/00—Working-up pitch, asphalt, bitumen
- C10C3/002—Working-up pitch, asphalt, bitumen by thermal means
Abstract
The invention provides modified biological asphalt and a preparation method therefor. The preparation method comprises the following steps: (1) carrying out a pyrolysis step: carrying out co-pyrolysis on a modifier and biomass so as to obtain modified bio-oil; and (2) carrying out a separation step: separating the modified bio-oil, so as to obtain a heavy component, i.e., the modified biological asphalt; and based on the total mass of the biomass and the modifier, the mass percent of the modifier is 10-50%, and the mass percent of the biomass is 50-90%. According to the modified biological asphalt and the preparation method therefor, synergistic chemical reactions among all ingredients can be achieved through the co-pyrolysis on the modifier and the biomass, so that the quality of the modified bio-oil is improved, and modification for biological asphalt is achieved from the source.
Description
Technical field
The present invention relates to a kind of modification biological pitch and preparation method thereof, belong to the field of bitumen technology of road engineering.
Background technology
Along with the fast development of national economy, also more and more higher to the requirement of communications and transportation, pitch as one of the main raw of paved roads, demand cumulative year after year.Traditional pitch is mainly from refining of petroleum, but due to China's oil resource shortage, have to from a large amount of pitch of external import to meet the demand of road industry, add the restriction of China's oil sources, the oil storing amount being applicable to refining high-performance pitch is little, therefore causes great puzzlement to the development of China's road bitumen industry.In addition, China is as large agricultural country, and biomass resource enriches, and about has the biomass resource of 700,000,000 tons urgently to develop every year.
Biomass pyrolytic realizes the conversion of solid biomass to liquid starting material by thermochemical method.At present, more research is had both at home and abroad about modification biological oil preparation Biological asphalt, due to biomass oxygen level high (mass percent reaches 30-40%), carbon content low (mass percent is only 35-45%), the Biological asphalt prepared easily aging, poor performance at low temperatures, water stability are bad, therefore there is the shortcomings such as productive rate is low, pavement performance is poor in the direct raw material as pitch.
Patent application CN102766340A discloses a kind of modification biological pitch, and it contains biological asphalt composition, properties-correcting agent, the first compatilizer and stablizer, and properties-correcting agent is rubber, resin, thermoplastic elastomer or its combination.The preparation technology of this modification biological pitch and raw material are comparatively complicated, need first pyrolysis oil to be obtained Biological asphalt through distillation or extraction treatment, stir with rubber oil, petroleum pitch, properties-correcting agent, shear again, therefore in utilization and extention, there are problems, and because polymer modification agent and Biological asphalt are simple physical mixed, therefore modified effect is limited.
Summary of the invention
the problem that invention will solve
The object of the present invention is to provide a kind of modification biological pitch and preparation method thereof, by the copyrolysis of biomass and properties-correcting agent, the collaborative chemical reaction between each component can be realized, thus improve the quality of modification biological oil, realize the modification of Biological asphalt from source.
for the scheme of dealing with problems
The invention provides a kind of preparation method of modification biological pitch, comprise the following steps:
(1) pyrolysis step: properties-correcting agent and biomass copyrolysis are obtained modification biological oil;
(2) separating step: obtain heavy ingredient by separating of oil for described modification biological, be modification biological pitch;
Based on the total mass of described biomass and described properties-correcting agent, the mass percent of described properties-correcting agent is 10-50%, and the mass percent of described biomass is 50-90%.
According to preparation method of the present invention, the temperature in described pyrolysis step is 300-500 DEG C.
According to preparation method of the present invention, the mode of described pyrolysis is one or more in fixed-bed pyrolysis, fluidized bed pyrolysis or lower mattress pyrolysis.
According to preparation method of the present invention, the mode of described separation is one or more in air distillation, underpressure distillation or solvent extraction.
According to preparation method of the present invention, described biomass be stalk, wood chip, bamboo bits or rice husk in one or more.
According to preparation method of the present invention, described properties-correcting agent is one or more in waste old, coal or waste or used plastics.
The invention provides a kind of modification biological pitch, it is prepared by preparation method of the present invention.
the effect of invention
A kind of modification biological pitch of the present invention and preparation method thereof, by the copyrolysis of biomass and properties-correcting agent, the heavy components content in modification biological oil can be improved, improve the quality of Biological asphalt, enable Biological asphalt petroleum replacing pitch, reduce the consumption of petroleum pitch.
Embodiment
The invention provides a kind of preparation method of modification biological pitch, comprise the following steps:
(1) pyrolysis step: properties-correcting agent and biomass copyrolysis are obtained modification biological oil;
(2) separating step: obtain heavy ingredient by separating of oil for described modification biological, be modification biological pitch.
The preparation method of modification biological pitch of the present invention, based on the total mass of biomass and properties-correcting agent, the massfraction of described properties-correcting agent is 10-50%, and the massfraction of biomass is 50-90%.
The preparation method of modification biological pitch of the present invention, the temperature in described pyrolysis step is 300-500 DEG C.
The preparation method of modification biological pitch of the present invention, described pyrolysis way is one or more in fixed-bed pyrolysis, fluidized bed pyrolysis or lower mattress pyrolysis.Pyrolysis step is as follows:
(1) by biomass material and properties-correcting agent raw material stoving, pulverize, be sized to 40-80 orders.
(2) by pyrolysis reactor heating temperatures to specifying numerical value, constant temperature 30min, adds the biomass material and properties-correcting agent that have sieved by hopper.
(3) question response collects the modification biological oil of generation completely afterwards.
The preparation method of modification biological pitch of the present invention, described separate mode is one or more in air distillation, underpressure distillation or solvent extraction.Concrete separating technology is as follows:
(1) temperature of air distillation is set as 300 DEG C, and the heavy ingredient collected in distillation tower at the bottom of still is modification biological pitch.
(2) temperature of underpressure distillation is set as 200 DEG C, and the heavy ingredient collected in distillation tower at the bottom of still is modification biological pitch.
(3) solvent-extracted solvent and bio oil ratio are 10:1, be separated be drying to obtain modification biological pitch after stirring 1h through suction filtration.
The preparation method of modification biological pitch of the present invention, described properties-correcting agent is one or more in waste old, coal or waste or used plastics.Adopt waste old, coal or waste or used plastics as properties-correcting agent, both can reduce environmental pollution, the effect of refuse reclamation can also be played.Waste old or coal have higher carbon content (massfraction reaches more than 80%), and oxygen level is extremely low, therefore by adding waste old or coal and biomass copyrolysis, the heavy constituent content in modification biological oil can be improved, thus reach the object improving modification biological oil.
In waste or used plastics, hydrogen richness is relatively high, thus with the process of biomass copyrolysis, can hydroperoxyl radical be provided, thus reduce the content of oxygen in modification biological oil, be conducive to the reactive behavior reducing modification biological oil, thus improve the ageing-resistant performance of Biological asphalt.
The preparation method of modification biological pitch of the present invention, described biomass be stalk, wood chip, bamboo bits or rice husk in one or more.
The preparation method of modification biological pitch of the present invention, described waste old, coal and waste or used plastics are all commercially available prod.
Embodiment
Below provide embodiments of the invention, it only for explaining and illustration purpose, does not limit the present invention.
The all material that the present invention uses and reagent are and market can buy.
Embodiment 1
Take the waste rubber powder mixing of stalk 5kg and 0.56kg, Task-size Controlling is between 40-80 order.Utilize fluidized-bed to carry out pyrolysis at 300 DEG C and obtain modification biological oil, modification biological oil obtains heavy ingredient through further air distillation process, is modification biological pitch 1.
Embodiment 2
Take the waste rubber powder mixing of wood chip 3kg and 3kg, Task-size Controlling is between 40-80 order.Utilize fluidized-bed to carry out pyrolysis at 500 DEG C and obtain modification biological oil, modification biological oil obtains heavy component through further underpressure distillation separation, process, is modification biological pitch 2.
Embodiment 3
Take the coal mixing of bamboo bits 5kg and 0.56kg, Task-size Controlling is between 40-80 order.Utilize fluidized-bed to carry out pyrolysis at 300 DEG C and obtain modification biological oil, modification biological oil obtains heavy component through further solvent extraction and separation, process, is modification biological pitch 3.
Embodiment 4
Take the coal mixing of rice husk 3kg and 3kg, Task-size Controlling is between 40-80 order.Utilize fluidized-bed to carry out pyrolysis at 500 DEG C and obtain modification biological oil, modification biological oil obtains heavy component through further air distillation separation, process, is modification biological pitch 4.
Embodiment 5
Take the waste or used plastics mixing of stalk 5kg and 0.56kg, Task-size Controlling is between 40-80 order.Utilize lower mattress to carry out pyrolysis at 300 DEG C and obtain modification biological oil, modification biological oil is separated through further underpressure distillation, process obtains heavy component, is modification biological pitch 5.
Embodiment 6
Take the waste or used plastics mixing of wood chip 3kg and 3kg, Task-size Controlling is between 40-80 order.Utilize lower mattress to carry out pyrolysis at 500 DEG C and obtain modification biological oil, modification biological oil obtains heavy component through further solvent extraction and separation, process, is modification biological pitch 6.
Embodiment 7
Take the waste rubber powder of wood chip 3kg and 1.5kg and the waste or used plastics mixing of 1.5kg, Task-size Controlling is between 40-80 order.Utilize lower mattress 500 DEG C to carry out pyrolysis and obtain modification biological oil, modification biological oil is separated through further underpressure distillation, process obtains heavy component, is modification biological pitch 7.
Comparative example
Take wood chip 6kg, Task-size Controlling is between 40-80 order.Utilize lower mattress 500 DEG C to carry out pyrolysis and obtain bio oil, pyrolysis oil is separated through further underpressure distillation, process obtains heavy component, is Biological asphalt.
Performance test
Test method is according to Department of Transportation's industry standard " highway engineering pitch and Asphalt Mixture Experiment rule (JTJE20-2011) ", and carry out performance test to the product that above-mentioned comparative example and embodiment prepare respectively, result is as shown in table 1.
Table 1
As shown in Table 1, the Biological asphalt poor performance that the independent pyrolysis of biomass obtains, Road construction can not be used for, the low-temperature performance of Biological asphalt significantly can be improved after adding waste old, add coal and only have a little improvement to the low-temperature performance of Biological asphalt, high-temperature behavior declines on the contrary to some extent, the high-temperature behavior adding waste or used plastics artifact pitch is significantly improved, therefore in order to obtain all good Biological asphalt of high temperature performance, can by waste old, waste or used plastics and biomass copyrolysis, result as described in Example 7, the modification biological bituminous road that it obtains can meet the requirement of " standard specification for construction and acceptance of highway asphalt pavement JTGF40-2004 " completely.
Claims (7)
1. a preparation method for modification biological pitch, is characterized in that, comprises the following steps:
(1) pyrolysis step: properties-correcting agent and biomass copyrolysis are obtained modification biological oil;
(2) separating step: obtain heavy ingredient by separating of oil for described modification biological, be modification biological pitch;
Based on the total mass of described biomass and described properties-correcting agent, the mass percent of described properties-correcting agent is 10-50%, and the mass percent of described biomass is 50-90%.
2. preparation method according to claim 1, is characterized in that, the temperature in described pyrolysis step is 300-500 DEG C.
3. preparation method according to claim 1 and 2, is characterized in that, the mode of described pyrolysis is one or more in fixed-bed pyrolysis, fluidized bed pyrolysis or lower mattress pyrolysis.
4. the preparation method according to any one of claim 1-3, is characterized in that, the mode of described separation is one or more in air distillation, underpressure distillation or solvent extraction.
5. the preparation method according to any one of claim 1-4, is characterized in that, described biomass be stalk, wood chip, bamboo bits or rice husk in one or more.
6. the preparation method according to any one of claim 1-5, is characterized in that, described properties-correcting agent is one or more in waste old, coal or waste or used plastics.
7. a modification biological pitch, it is prepared by the preparation method described in any one of claim 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510736933.1A CN105419839A (en) | 2015-11-03 | 2015-11-03 | Modified biological asphalt and preparation method therefor |
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| CN201510736933.1A CN105419839A (en) | 2015-11-03 | 2015-11-03 | Modified biological asphalt and preparation method therefor |
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| CN105419839A true CN105419839A (en) | 2016-03-23 |
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| CN201510736933.1A Pending CN105419839A (en) | 2015-11-03 | 2015-11-03 | Modified biological asphalt and preparation method therefor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106336673A (en) * | 2016-08-25 | 2017-01-18 | 深圳市市政设计研究院有限公司 | Biological oil compounded nanometer diatomite modified asphalt and preparation method thereof |
| CN112831335A (en) * | 2021-01-13 | 2021-05-25 | 中国石油大学(华东) | Method for preparing mesophase pitch and mesophase carbon microspheres from heavy oil |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106336673A (en) * | 2016-08-25 | 2017-01-18 | 深圳市市政设计研究院有限公司 | Biological oil compounded nanometer diatomite modified asphalt and preparation method thereof |
| CN112831335A (en) * | 2021-01-13 | 2021-05-25 | 中国石油大学(华东) | Method for preparing mesophase pitch and mesophase carbon microspheres from heavy oil |
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Application publication date: 20160323 |