CN109575614A - Pitch, preparation method and the damping unit comprising it - Google Patents
Pitch, preparation method and the damping unit comprising it Download PDFInfo
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- CN109575614A CN109575614A CN201710900253.8A CN201710900253A CN109575614A CN 109575614 A CN109575614 A CN 109575614A CN 201710900253 A CN201710900253 A CN 201710900253A CN 109575614 A CN109575614 A CN 109575614A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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Abstract
The present invention provides a kind of pitch, preparation method and include its damping unit.The preparation method includes: that viscous crude is carried out air-distillation, obtains reduced crude and atmospheric side draw component, the first cutting temperature >=350 DEG C of air-distillation process, and boiling point higher than the group of the first cutting temperature and is divided into reduced crude, viscous crude is Liaohe River Yue Dong viscous crude；And be evaporated under reduced pressure reduced crude, pitch and decompression side line component, the second cutting temperature >=460 DEG C of vacuum distillation are obtained, the group that boiling point is higher than the second cutting temperature is divided into pitch, and the vacuum degree of vacuum distillation is 729mm mercury column.Boiling point is removed in the first cutting temperature volatile component below by air-distillation, this advantageously reduces the content of volatile organic substance in pitch, improves the feature of environmental protection of pitch.Boiling point is removed in the second cutting temperature condensed-nuclei aromatics below by vacuum distillation process, to reduce the content of carcinogenicity substance in pitch, to further improve the feature of environmental protection of pitch.
Description
Technical field
The present invention relates to environmentally-friendly asphalt field of material preparation, in particular to a kind of pitch, preparation method and comprising
Its damping unit.
Background technique
With the development and application of bitumen technology, pitch has been widely used for all trades and professions, close with people's lives
It is inseparable.We can frequent close contact to the product for using pitch to produce for main material, as automobile interior decoration, fitness equipment and
Black rubber product etc., road construction unit even more continually touch the asphaltic products of hot melt state.It is seldom in former people
Itself medical safety of concern asphaltic products is removed, and with society and raising of the environment to environmental requirement, the ring of asphaltic products
The performance that ensures safety more and more attention has been paid to.
It is known that all containing micro Benzpyrene and condensed-nuclei aromatics in pitch mostly, these substances have centainly carcinogenic
Property.Since in transportation industry, pitch is mainly used in mating formation for highway pavement, do not contacted directly with human hair life, thus this is asked
Topic is usually ignored by people.
However in many and human body close contact field, people begin to focus on the medical safety of asphaltic products, to production
The carcinogenicity of product proposes associated specifications.Rubber for tire industry, pitch have longer as a kind of dispersing agent and plasticizer
Applicating history.And with European Union etc. area to environmental protection and medical safety requirement it is higher and higher, conventional pitch without
Method meets existing application demand, such as with human contact's environment, such as pipeline corrosion protection, the antiseepage that blocks water, automobile interior decoration, sound-proof damping,
Many places such as health-care facilities, entertainment for children facility are proposed the requirement (volatile organic substance of medical safety to material
Less than 30ppm).
In order to preferably determine the direction of research, applicant has carried out industry investigation to pitch preparation field, the results showed that
The research direction of those skilled in the art mainly has:
Existing literature discloses a kind of novel environment friendly bituminous concrete, guarantees cleaning, dry surface on old road surface
Upper sprinkling SBS modified emulsifying asphalt layer, has used pitch milling waste material, energy conservation and environmental protection.
Another existing literature provides a kind of energy conservation and environmental protection asphalt modifier, and the mobility of pitch can be improved, and reduces
The construction temperature of pitch, energy saving, polluted gas discharge amount is few in work progress, good environmental protection.
Another piece existing literature reports the preparation process and its application of a kind of high temperature resistant environment-protective pitch, mainly by nothing
Machine compound is mixed with bitumen, and clay is added in stirring, and compacting is smeared three times smearing heating；With high temperature resistant, environmental protection
Advantage does not illustrate the specific targets and feature of environmental protection.
Existing literature proposes a kind of High-strength environment-friendlyasphalt asphalt formula, solves the problems, such as garbage reclamation and garbage utilization problem.
Existing literature reports a kind of energy saving and environment friendly bituminous pavement construction material, and the energy saving and environment friendly bituminous pavement is built
It builds material to be made of rubble, Machine-made Sand or aggregate chips, filler and novel liquid additive, mainly reduces energy consumption in construction material,
Reduce noxious gas emission.
Existing literature is referred to a kind of warm mix environmentally-friendly asphalt and processing technology, and passing through optimization asphalt formula reduces drip
Blueness mixes and stirs temperature to energy conservation and environmental protection, reduces production cost.
Existing literature reports a kind of high temperature resistant environment-protective pitch, presses including following inorganic compound, clay, bitumen,
Which but do not illustrate with environmental protection characteristic.
A kind of environmentally-friendly asphalt of another document report, including modifying agent, promotor, aromatic series mink cell focus, coal tar pitch and
Modified coal tar pitch etc..Environmentally-friendly asphalt is made by certain technique.Reduce the Carcinogenic Polycyclic Aromatic Hydrocarbons content in raw material, no modifying agent
It is remained with promotor, environmentally-friendly asphalt benzo [a] pyrene (BaP) content obtained is lower than 500ppm, differs with the requirement less than 30ppm
It is larger.
Existing literature, which discloses, is related to a kind of preparation method of high-performance environment-friendly pitch, with aromatic series mink cell focus, coal tar pitch
Deng for raw material, coal measures with benzo [a] pyrene content lower than 300ppm etc. is regulator, and certain condition issues heat polymerization reaction and obtains
To polymerbitumen, polymerbitumen obtains different softening point environmentally-friendly asphalt by coming out.Alleged its has low toxicity, low pollution, and real
Strong carcinogenicity benzo [a] pyrene (BaP) prohibitive content reaches 300ppm on border, differs greatly with the requirement less than 30ppm.
In conclusion current environmentally-friendly asphalt mainly around how to reduce construction temperature, reduces volatile materials discharge, drop
The purpose of low energy consumption, is studied；Some research is intended to reduce BaP content in the contour carcinogenic material of coal tar pitch, but
It can achieve not carcinogenic effect still without definite effective method, be diluted merely by other a large amount of substances are added,
The content (still up to 300-500ppm) of BaP is reduced, thus there is no solve the problems, such as substance.For world health
It organizes the content for a variety of condensed-nuclei aromatics with high carcinogenic announced not refer to, does not more illustrate how to carry out removing processing
It is monitored with content.
Summary of the invention
The main purpose of the present invention is to provide a kind of pitch, preparation method and comprising its damping unit, to solve
There is the exceeded neck that may not apply to contact with human skin of harmful substance volatility by pitch made from existing method
The problem of domain.
To achieve the goals above, one aspect of the invention provides a kind of preparation method of pitch, the preparation method packet
It includes: viscous crude is subjected to air-distillation, obtain reduced crude and atmospheric side draw component, the first cutting temperature of air-distillation process >=
350 DEG C, and boiling point is divided into reduced crude higher than the group of the first cutting temperature, boiling point is divided into normal pressure lower than the group of the first cutting temperature
Side line component, viscous crude are Liaohe River Yue Dong viscous crude；And be evaporated under reduced pressure reduced crude, pitch and decompression side line component are obtained,
Second cutting temperature >=460 DEG C of vacuum distillation, and boiling point is divided into pitch higher than the group of the second cutting temperature, boiling point is lower than second
The group of cutting temperature is divided into depressurised side line component, and the vacuum degree of vacuum distillation is 729mm mercury column.
Further, preparation method includes: to obtain cutting temperature >=490 DEG C of pitch, vacuum degree in vacuum distillation process
For 731mm mercury column.
Further, in vacuum distillation process, the yield for controlling pitch is 70~80wt% of reduced crude.
Further, during air-distillation, cutting temperature >=360 DEG C of reduced crude.
Further, decompression side line component includes subtract three line furfural refining oil, above-mentioned preparation method further include: by viscous crude with
Raw material of the mixture for the line furfural refining oil that at least partly subtracts three as air-distillation process, to prepare pitch；Preferably, subtract three
The re-injection amount of line furfural refining oil is 50wt%.
Further, after being evaporated under reduced pressure, above-mentioned preparation method further includes by the substrate material of vacuum distillation process
It is mixed with environment-friendly rubber oil, obtains pitch；Preferably, environment-friendly rubber oil accounts for 1~10wt% of substrate material.
On the other hand the application additionally provides a kind of using pitch made from above-mentioned preparation method, the volatile organic of pitch
The total content of substance is less than 30ppm, and needle penetration is 15~35dmm.
Further, the total content of the volatile organic substance of pitch is 25ppm, needle penetration 35dmm.
Further, the total content of the volatile organic substance of pitch is 15ppm, needle penetration 24dmm.
The another aspect of the application additionally provides a kind of damping unit, which includes damping material, the damping
Material includes above-mentioned pitch.
It applies the technical scheme of the present invention, using Liaohe River Yue Dong viscous crude as raw material, and it is carried out after particularly handling, obtained
Pitch have the characteristics that volatile organic substance total content is low, needle penetration is small.Specific preparation method includes: with above-mentioned viscous crude
For raw material, above-mentioned viscous crude is cut at cutting temperature by air-distillation, obtains reduced crude and atmospheric side draw component,
The group that boiling point is higher than cutting temperature is divided into reduced crude, and boiling point is divided into atmospheric side draw component lower than the group of above-mentioned cutting temperature,
Middle cutting temperature >=350 DEG C, this advantageously reduces the content of volatile organic substance in finally obtained pitch, and then improves drip
The green feature of environmental protection.Then it using reduced crude as raw material, is cut to obtain required pitch and depressurised side by vacuum distillation process
Line component, wherein cutting temperature >=460 DEG C.Boiling point can be lower than the decompression side line component of cutting temperature by this by being evaporated under reduced pressure
Removal removes the condensed-nuclei aromatics in reduced crude, to reduce the content of carcinogenicity substance and alkanes substance in pitch, from
And further improve the feature of environmental protection of pitch.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.Below in conjunction with embodiment, the present invention will be described in detail.
As described in background technique, current environmentally-friendly asphalt reduces volatilization mainly around how to reduce construction temperature
Property substance discharge, reduce energy consumption the purpose of studied, some research is intended to reduce in the contour carcinogenic material of coal tar pitch
BaP content, but can achieve not carcinogenic effect still without definite effective method, while it is big merely by addition
It measures other substances to be diluted, reduces the content (still up to 300~500ppm) of BaP, thus it is substantive there is no solving
The problem of.Have that harmful substance volatility is exceeded to be may not apply to connect with human skin by pitch made from existing method
The problem of field of touching.
In order to solve the above-mentioned technical problem, applicant is largely studied for various viscous crude categories, but using existing
Oil product to be unable to get volatile organic substance content always lower, and lower asphaltic products of needle penetration.It is above-mentioned in order to solve
Technical problem, applicant carried out more in-depth studies, surprisingly find, using Liaohe River Yue Dong viscous crude as raw material, and to it
It carries out after particularly handling, the pitch of acquisition has the characteristics that the volatile organic substance total content of discharge is low, needle penetration is small.Tool
The preparation method of body includes: to be carried out above-mentioned viscous crude at the first cutting temperature by air-distillation using above-mentioned viscous crude as raw material
Cutting obtains reduced crude and atmospheric side draw component, and the group that boiling point is higher than the first cutting temperature is divided into reduced crude, and boiling point is lower than
The group of first cutting temperature is divided into atmospheric side draw component (volatile organic substance), wherein cutting temperature >=350 DEG C, this is conducive to
The content of volatile organic substance in finally obtained pitch is reduced, and then improves the feature of environmental protection of pitch.Then with reduced crude
For raw material, cut to obtain required pitch and decompression side line component by vacuum distillation process, wherein the second cutting temperature >=
460 DEG C, the group that boiling point is higher than second cutting temperature is divided into the pitch, and boiling point is lower than the component of second cutting temperature
For the decompression side line component, the vacuum degree of the vacuum distillation is 729mm mercury column.This can be by being evaporated under reduced pressure low boiling point
It is removed in the decompression side line component of the second cutting temperature, i.e., the condensed-nuclei aromatics in reduced crude is removed, caused with reducing in pitch
The content of oncofetal substance and alkanes substance, to further improve the feature of environmental protection of pitch.
" Liaohe River Yue Dong viscous crude " refers to the viscous crude from Liaohe River Yue Dong oilfield exploitation, viscosity 1001mm in the application2/s。
" atmospheric side draw component " and " decompression side line component " is identical as the concept understood in this field in the application, leads to
It is mixture both in normal situation.
It is also just different to the quality requirements of pitch since the environment of application is different.In order to further enhance the synthesis of pitch
Performance, in a preferred embodiment, preparation method include: obtained in vacuum distillation process the cutting temperature of pitch >=
490 DEG C, vacuum degree is 731mm mercury column.In vacuum distillation process, the cutting temperature of vacuum distillation process is further promoted, is had
Conducive to the content of condensed-nuclei aromatics and alkanes light component in further removing reduced crude, and then improve the environmental-protecting performance of pitch.
The preparation method of above-mentioned pitch provided by the present application, pitch, which is made, has the feature of environmental protection good, and volatile organic substance is total
The advantages such as content is low.In a preferred embodiment, during air-distillation, cutting temperature >=360 DEG C of reduced crude.
During air-distillation, the cutting temperature further progress of reduced crude is promoted, and is conducive to further remove having in pitch
Machine volatile materials, to further increase the feature of environmental protection of made asphaltic products.
In a preferred embodiment, in vacuum distillation process, control pitch yield be reduced crude 70~
80wt%.The yield of pitch is limited within the above range, the needle penetration for further decreasing pitch is conducive to.
In order to preferably remove condensed-nuclei aromatics, to reduce the content of carcinogenicity substance in pitch, it is preferable that decompression side line group
It point include subtract three line furfural refining oil, above-mentioned preparation method further include: by viscous crude and the line furfural refining oil that at least partly subtracts three
Raw material of the mixture as air-distillation process, to prepare pitch.Preferably, the re-injection amount for the line furfural refining oil that subtracts three is
50wt%, this is conducive to the removal efficiency of TVOC in pitch improving 30%.
In order to further adjust the needle penetration of pitch, in a preferred embodiment, after being evaporated under reduced pressure,
Above-mentioned preparation method further includes that the substrate material (decompression residuum) of vacuum distillation process and environment-friendly rubber oil are mixed to get pitch.It adopts
The needle penetration of the pitch made from above-mentioned preparation method is 20~35.Above-mentioned " environment-friendly rubber oil " is existing commercial product, full
The rubber oil of the REACH regulation environmental protection standard of foot such as European Union.According to the composition of environment-friendly rubber oil, environment-friendly rubber oil and decompression are steamed
The ratio for evaporating the substrate material (decompression residuum) of process can be adjusted, it is preferable that environment-friendly rubber oil account for substrate material 1~
10wt%.
Another aspect of the present invention additionally provides a kind of pitch, and the total content (TVOC) of the volatile organic substance of pitch is small
In 30ppm, needle penetration is 15~35dmm.
Total content since the volatile organic substance of pitch discharge is made is lower than 30ppm, thus it is with good ring
Guarantor property, can be used for the field contacted with human skin.The needle penetration of another aspect pitch is that 15~35dmm shows that pitch has
Good viscoplasticity and anti-shearing damage capability.In summary of both reason, above-mentioned pitch provided by the present application with people
The application field that body skin is in contact is with good application prospect.
It is directed to different applications simultaneously, the performance of pitch will be different.In a preferred embodiment, pitch
Volatile organic substance total content be 25ppm, needle penetration 35dmm.In a preferred embodiment, pitch has
The total content of machine volatile materials is 15ppm, needle penetration 24dmm.The total content of the volatile organic substance of pitch is lower, drip
The green feature of environmental protection is higher, and the field that can be applied is also more extensive.And the numerical value of needle penetration is lower, the anti-shearing destruction of pitch
Ability is better.
In order to better understand above-mentioned technology contents, present invention also provides a kind of damping unit, which includes
Damping material, above-mentioned damping material include above-mentioned asphalt material.
Total content since the volatile organic substance of pitch discharge is made is lower than 30ppm, thus it is with good ring
Guarantor property, can be used for the field contacted with human skin.The needle penetration of another aspect pitch is that 15~35dmm shows that pitch has
Good viscoplasticity.Anti-shearing damage capability.When thus using above-mentioned asphalt material as damping material, have in damping unit
The advantages that organic alkane volatility is low, and anti-shearing damage capability is strong, it is thus possible to be applied to and be in contact with human skin
Field, which greatly improves the economic benefits of asphalt material.
Below in conjunction with specific embodiment, present invention is further described in detail, these embodiments should not be understood as limitation originally
Invent range claimed.
Embodiment 1
Viscous crude raw material is；Liaohe River Yue Dong viscous crude.
Above-mentioned viscous crude is subjected to air-distillation, is cut at 350 DEG C, the component using boiling point greater than 350 DEG C is as normal pressure
Residual oil.
Above-mentioned reduced crude is evaporated under reduced pressure in the case where vacuum degree is 729mm mercury column, is cut, will be boiled at 460 DEG C
Component of the point greater than 460 DEG C is as required pitch, while the yield for controlling pitch is 65wt%.
Embodiment 2
Viscous crude raw material is；Liaohe River Yue Dong viscous crude.
Above-mentioned viscous crude is subjected to air-distillation, is cut at 350 DEG C, the component using boiling point greater than 350 DEG C is as normal pressure
Residual oil.
Above-mentioned reduced crude is evaporated under reduced pressure in the case where vacuum degree is 731mm mercury column, is cut, will be boiled at 490 DEG C
Component of the point greater than 490 DEG C is as required pitch, while the yield for controlling pitch is 73wt%.
Embodiment 3
Viscous crude raw material is；Liaohe River Yue Dong viscous crude.
Above-mentioned viscous crude is subjected to air-distillation, is cut at 350 DEG C, the component using boiling point greater than 350 DEG C is as normal pressure
Residual oil.
Above-mentioned reduced crude is evaporated under reduced pressure in the case where vacuum degree is 729mm mercury column, is cut, will be boiled at 460 DEG C
Component of the point greater than 460 DEG C is as required pitch, while the yield for controlling pitch is 74wt%.
Embodiment 4
Viscous crude raw material is；Liaohe River Yue Dong viscous crude.
Above-mentioned viscous crude is subjected to air-distillation, is cut at 360 DEG C, the component using boiling point greater than 360 DEG C is as normal pressure
Residual oil.
Above-mentioned reduced crude is evaporated under reduced pressure in the case where vacuum degree is 731mm mercury column, is cut, will be evaporated at 490 DEG C
Component of the journey greater than 470 DEG C is as required pitch, while the yield for controlling pitch is 73wt%, by boiling point greater than 490 DEG C
Component is as required pitch.
Embodiment 5
Viscous crude raw material is；Liaohe River Yue Dong viscous crude.
Above-mentioned viscous crude is subjected to air-distillation, is cut at 350 DEG C, the component using boiling point greater than 350 DEG C is as normal pressure
Residual oil.
Above-mentioned reduced crude is evaporated under reduced pressure in the case where vacuum degree is 729mm mercury column, is cut at 460 DEG C, simultaneously
The yield for controlling pitch is the 94wt% of reduced crude, and the component using boiling point greater than 460 DEG C is as required pitch.
Embodiment 6
With the difference of embodiment 1 are as follows: the substrate material (decompression residuum) and environment-friendly rubber oil (type for obtaining vacuum distillation process
Number NAP10-2) it is mixed by weight for 100:1.5, obtain required pitch.
Embodiment 7
With the difference of embodiment 1 are as follows: the substrate material (decompression residuum) for obtaining vacuum distillation process carries out re-injection, re-injection amount
For 50wt%.Injected substrate material (decompression residuum) is successively to carry out normal pressure steaming after 100:10 is mixed with viscous crude by weight
It evaporates and is evaporated under reduced pressure, obtain required pitch.
Comparative example 1
With the difference of embodiment 1 are as follows: viscous crude raw material be Liaohe River mixing viscous crude (miscella of Liaohe Oil Field multi-tiling crude oil,
Viscosity is 200mm at 40 DEG C2/ s, density 960g/m3)。
Comparative example 2
Viscous crude raw material is；Liaohe River Yue Dong viscous crude.
Above-mentioned viscous crude is subjected to air-distillation, is cut at 300 DEG C, the component using boiling point greater than 300 DEG C is as normal pressure
Residual oil.
Above-mentioned reduced crude is evaporated under reduced pressure in the case where vacuum degree is 729mm mercury column, is cut, will be boiled at 460 DEG C
Component of the point greater than 460 DEG C is as required pitch.
The performance of pitch obtained in embodiment 1 to 7 and comparative example 1 to 2, is evaluated using following methods:
The total content of volatile organic substance: had using method specified in Q/CC SY248-2011 to pitch discharge
The content of machine volatile matter is detected.
Needle penetration: the needle penetration of pitch is surveyed using JTJ052-2000 method using bitumen needle forcemeter device
Examination.
Table 1
| Embodiment | TVOC total content, ppm | Needle penetration, 1/10mm |
| 1 | 25 | 35 |
| 2 | 15 | 19 |
| 3 | 19 | 25 |
| 4 | 8 | 17 |
| 5 | 22 | 28 |
| 6 | 12 | 26 |
| 7 | 11 | 28 |
| Comparative example 1 | 89 | 37 |
| Comparative example 2 | 40 | 35 |
It can be seen from the above description that the above embodiments of the present invention realized the following chievements:
Comparing embodiment 1 and comparative example 1 are it is found that advantageously reduce TVOC total content in pitch using specific viscous crude raw material
And needle penetration.
Comparing embodiment 1 and 2 is it is found that the term restriction of vacuum distillation is advantageously reduced in the preferred range of the application
TVOC total content and needle penetration in pitch.
Comparing embodiment 1,3 and 5 is it is found that the yield of pitch in vacuum distillation, which is limited in the preferred range of the application, to be had
Conducive to TVOC total content and needle penetration in reduction pitch.
Comparing embodiment 1,4 and comparative example 2 are conducive to the term restriction of air-distillation in the preferred range of the application
Reduce TVOC total content and needle penetration in pitch.
Comparing embodiment 1 and 6 is it is found that substrate material (decompression residuum) and environment-friendly rubber oil that vacuum distillation process is obtained are mixed
Be conducive to further decrease the TVOC total content and needle penetration of pitch after conjunction.
Comparing embodiment 1 and embodiment 7 after decompression residuum re-injection with viscous crude it is found that after being mixed again as raw material
Air-distillation and vacuum distillation is carried out to be conducive to improve raw material availability, at the same also help further decrease pitch TVOC it is total
Content and needle penetration.
Using above-mentioned viscous crude as raw material, above-mentioned viscous crude is cut at cutting temperature by air-distillation, obtains normal pressure
Residual oil and atmospheric side draw component, the group that boiling point is higher than cutting temperature are divided into reduced crude, and boiling point is lower than the group of above-mentioned cutting temperature
It is divided into atmospheric side draw component, wherein cutting temperature >=350 DEG C, this advantageously reduces volatile organic object in finally obtained pitch
The content of matter, and then improve the feature of environmental protection of pitch.Then using reduced crude as raw material, cut by vacuum distillation process
To required pitch and side line component is depressurized, wherein cutting temperature >=460 DEG C.Boiling point can be lower than cutting by vacuum distillation by this
The decompression side line component of temperature removes, i.e., removes the condensed-nuclei aromatics in reduced crude, with reduce in pitch carcinogenicity substance and
The content of alkanes substance, to further improve the feature of environmental protection of pitch.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of preparation method of pitch, which is characterized in that the preparation method includes:
Viscous crude is subjected to air-distillation, obtains reduced crude and atmospheric side draw component, the first cutting of the air-distillation process
Temperature >=350 DEG C, and boiling point is divided into the reduced crude higher than the group of first cutting temperature, boiling point is cut lower than described first
The group for cutting temperature is divided into the atmospheric side draw component, and the viscous crude is Liaohe River Yue Dong viscous crude；
The reduced crude is evaporated under reduced pressure, the pitch is obtained and depressurizes side line component, the second of the vacuum distillation
Cutting temperature >=460 DEG C, and boiling point is divided into the pitch higher than the group of second cutting temperature, boiling point is cut lower than described second
The group for cutting temperature is divided into the decompression side line component, and the vacuum degree of the vacuum distillation is 729mm mercury column.
2. preparation method according to claim 1, which is characterized in that the preparation method includes: described was evaporated under reduced pressure
Cheng Zhong, obtains cutting temperature >=490 DEG C of the pitch, and vacuum degree is 731mm mercury column.
3. preparation method according to claim 1, which is characterized in that in the vacuum distillation process, control the pitch
Yield be the reduced crude 70~80wt%.
4. preparation method according to claim 3, which is characterized in that during the air-distillation, the reduced crude
Cutting temperature >=360 DEG C.
5. preparation method according to claim 1, which is characterized in that line furfural is smart including subtracting three for the decompression side line component
Liquefaction, the preparation method further include: using the mixture of the viscous crude and at least partly described line furfural refining oil that subtracts three as
The raw material of the air-distillation process, to prepare the pitch；Preferably, the re-injection amount of the line furfural refining oil that subtracts three is to subtract
The 50wt% of three line extracted amounts.
6. preparation method according to claim 3, which is characterized in that after carrying out the vacuum distillation, the preparation
Method further includes mixing the substrate material of the vacuum distillation process with environment-friendly rubber oil, obtains the pitch；Preferably, described
Environment-friendly rubber oil accounts for 1~10wt% of the substrate material.
7. a kind of using pitch made from preparation method described in any one of claims 1 to 6, which is characterized in that the drip
The total content of green volatile organic substance is less than 30ppm, and needle penetration is 15~35dmm.
8. pitch according to claim 7, which is characterized in that the total content of the volatile organic substance of the pitch is
25ppm, needle penetration 35dmm.
9. pitch according to claim 7, which is characterized in that the total content of the volatile organic substance of the pitch is
15ppm, needle penetration 24dmm.
10. a kind of damping unit, the damping unit includes damping material, which is characterized in that the damping material includes right
It is required that pitch described in any one of 7 to 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710900253.8A CN109575614B (en) | 2017-09-28 | 2017-09-28 | Asphalt, preparation method thereof and damping device comprising asphalt |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710900253.8A CN109575614B (en) | 2017-09-28 | 2017-09-28 | Asphalt, preparation method thereof and damping device comprising asphalt |
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| CN109575614B CN109575614B (en) | 2021-04-30 |
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