CA1279598C - Process for the preparation of bitumen - Google Patents
Process for the preparation of bitumenInfo
- Publication number
- CA1279598C CA1279598C CA000531700A CA531700A CA1279598C CA 1279598 C CA1279598 C CA 1279598C CA 000531700 A CA000531700 A CA 000531700A CA 531700 A CA531700 A CA 531700A CA 1279598 C CA1279598 C CA 1279598C
- Authority
- CA
- Canada
- Prior art keywords
- bitumen
- residue
- boiling point
- distillation
- process according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- 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
- C10C3/06—Working-up pitch, asphalt, bitumen by distillation
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Civil Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Working-Up Tar And Pitch (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
ABSTRACT
PROCESS FOR THE PREPARATION OF BITUMEN
Process for the preparation of bitumen in which a residual fraction of a thermally cracked hydrocarbon feedstock is distilled under subatmospheric pressure at a maximum distillation temperature that corresponds with the boiling point at the subatmospheric pressure of hydrocarbons having an atmospheric boiling point of 455-540°C and at least a part of the distillation residue is recovered as bitumen.
PROCESS FOR THE PREPARATION OF BITUMEN
Process for the preparation of bitumen in which a residual fraction of a thermally cracked hydrocarbon feedstock is distilled under subatmospheric pressure at a maximum distillation temperature that corresponds with the boiling point at the subatmospheric pressure of hydrocarbons having an atmospheric boiling point of 455-540°C and at least a part of the distillation residue is recovered as bitumen.
Description
359~3 PROCæSS FOR THE PREPARATION OF BITUMEN
The present invention relates to a process for the preparation of bitumen, bitumen thus prepared and bitumunous compositions ccmprising bitumen thus prepared.
Bitumens are widely used for purposes such as road construction, roofing, the coating of pipelines, as binders for briquettes etc. In many applications the bitumen is mixed with aggregates and/or filler materials which render the resulting mixture strength. For example in road construction bitumen is mixed with sand and stones and the mixture is used as road asphalt. It is evident that the road asphalt should be sufficiently resistent to abrasion and fretting. So, it would be advantageous to prepare bitumens which when mixed with filler material and/or aggregates, show an increased resistence to fretting.
Another imçlortant feature of bitumen is its resistanoe to water ingress. This is especially the case when bitumen mixes are used in applications to protect structures from water, such as roofing, pipeline coating and road construction applications.
It has now been found that bitumen originating from a thermally cracked hydrocarbon feedstock or bituminous compositions containing such bitumen show excellent resistances to fretting and water ingress.
However, it is known that bitumens obtained from thermally cracked feedstocks have unsatisfactory ageing and stability properties as is described in Fuel, 60 (1981) 401-404 and Fuel, BN43.008 ...
1'~795''3,~
The present invention relates to a process for the preparation of bitumen, bitumen thus prepared and bitumunous compositions ccmprising bitumen thus prepared.
Bitumens are widely used for purposes such as road construction, roofing, the coating of pipelines, as binders for briquettes etc. In many applications the bitumen is mixed with aggregates and/or filler materials which render the resulting mixture strength. For example in road construction bitumen is mixed with sand and stones and the mixture is used as road asphalt. It is evident that the road asphalt should be sufficiently resistent to abrasion and fretting. So, it would be advantageous to prepare bitumens which when mixed with filler material and/or aggregates, show an increased resistence to fretting.
Another imçlortant feature of bitumen is its resistanoe to water ingress. This is especially the case when bitumen mixes are used in applications to protect structures from water, such as roofing, pipeline coating and road construction applications.
It has now been found that bitumen originating from a thermally cracked hydrocarbon feedstock or bituminous compositions containing such bitumen show excellent resistances to fretting and water ingress.
However, it is known that bitumens obtained from thermally cracked feedstocks have unsatisfactory ageing and stability properties as is described in Fuel, 60 (1981) 401-404 and Fuel, BN43.008 ...
1'~795''3,~
63 (1984) 1515-1517. Therefore, such bitumens are considered to be unsuitable for use in e.g. road asphalt.
It has now been found that a specific process for handling a thermally cracked feedstock yields bitumen having excellent resistances against fretting and water ingress and showing satisfactory stability and ageing properties.
The invention therefore provides a process for the preparation of bitumen in which a residual fraction of a thermally cracked hydrocarbon feedstock is distilled under subatmospheric pressure of between 2 to 120 mmHg (0.27 to 16.0kPa) at a maximum distillation temperature of between 310 to 370C that corresponds with the boiling point at the subatmospheric pressure of hydrocarbons having an atmospheric boiling point of 455-540C and at least a part of the distillation residue is recovered as bitumen.
The reference to the hydrocarbons boiling point at atmospheric pressure is made after conversion of a subatmospheric boiling point in accordance with (the Maxwell-Bonnell relation described in Ind. Eng. Chem. r 49 (1957) 1187-1196). In practice a boiling point of a hydrocarbon ls determlned under subatmospheric pressure. Since at many subatmospheric pressures many different bolling points can be determined the person skilled in the art prefers to refer to an unambiguous converted atmospheric boiling point.
The maximum distillation temperature should not be below the boiling point of hydrocarbons with an atmospheric boiling point of 455C (455C/bar-hydrocarbons), since otherwise an unsatisfactory removal of relatively light hydrocarbons would be 1~7~
-2a- 63293-2775 obtained, which would result in relatively unstable and rapidly ageing bitumen, just as described in the above articles from Fuel.
On the other hand, if the maximum temperature would exceed the 540C/bar-hydrocarbons boiling point the resulting residue would be too hard to be suitable for use in e.g. road asphalt and may give rise to incompatibllity problems when used in bitumen blends.
t 1~7~
me residual fraction subjected to the subatmospheric distillation can be almost any fraction fro~ the thermal cracking unit. It is advisable to send the thermally cracked product to an atmospheric distillation unit to separate S distillate products such as gases, gasoline, kerosene and gas oils from the atmospheric residue. Conveniently this a~spheric residue is sent to the subatmospheric distillation.
The atmospheric distillation is suitably carried out at a botton temperature of from 300 to 370C. Hence, the residual fraction sent to the subatmospheric distillation suitably has at least 80~w of components having an atmospheric boiling point of at least 300C.
Thermal cracking is a rather simple cracking process. At a temperature level of about 400 to 500C the longer hydrocarbons become unstable and tend to break into smaller molecules of all possible sizes and types. m e feedstock for thermal cracking is generally a mixture of complex heavy hydrocarbons left over from an atmospheric or vacuum distillation of a crude oil.
Visbreaking, i.e. reducing viscosity by breaXing of molecules, is an important application of thermal cracking because it reduces the viscosity of the residue obtained after the thermal cracking considerably. Visbreaking is carried out by sending a feed after appropriate preheat to a furnace for heating the feed to the cracking temperature. From there the feed is fed into a soaker dcwnstream of the furnace where most of the cracking takes place. The soaker has suitably internal baffles to prevent too much back-mixing. The products are gas, distillates and residue. This residue has a lower viscosity than the feed.
Preferably such a residue, i.e. the residue of a visbroken hydrocarbon feed, is used as the residual fraction in the process according to the present invention. The visbreaking conditions are suitably a pressure of from 2 to 30 bar, a temperature of 400 to 500C and a residence time of from 5 to 60 min.
BN43.008 1~79S9~
The residual fraction is distilled under subatmospheric pressure. This includes that it is subjected to a conventional vacuum distillation, provided that the requirement as to the maximum distillation temperature is met. It is, however, preferred to subject the residual fraction to flash distillation.
In flash distillation the residual fraction is heated to a temperature within the boiling range at a lower pressure of the liquid and introduced into a subatmospheric flash zone to yield distillate and residue. The residue is at least partly recovered as bitumen.
Many subatmospheric presæures can be uæed in the process according to the invention. Each pressure applied determines the temperature limits within which the distillation has to be carried out.
As stated hereinbefore, the maximum distillation temperature is selected such that on the one hand a satisfactory removal of relatively light hydrocarbons is obtained but on the other hand the formation of an unacceptably hard bitumen is avolded. Preferably, the maximum distillation temperature corresponds with the boiling point of 460-510C/bar-hydrocarbons.
The bitumen prepared according to the invention has satisfactory ageing and stability properties. To even improve the oxidation stabllity the bottom fraction of the distillation is preferably at least partly subjected to blowing before being 9~
recovered as the desired bitumen. The blcwing process is generally carried out continuously in a blowing column, into which liquid bitumen is fed and wherein the liquid level is kept approximately constant by withdrawing bitumen ne æ the bottom.
Air is blown through the liquid mass via an air distributor at the bottom of the column. Suitable blowing te~çeratures are 170-320C, in particulæ 220-275C.
It is known in the art to blend væ ious types of bitumen to obtain a bitumen composition having the desired properties. me present invention further provides bituminous compositions comprising bitumen prepared in a pro oe ss according to the present invention. It should, however, be avoided that such a bituminous composition contains an overbalance of asphaltenes sin oe in such compositions heterogeneity may occur. mere is a chance of creating an overbalan oe of asphaltenes when a thermally cracked residue is used as blending component, since it is known, e.g. from the above-mentioned articles in Fuel, that the asphaltene content in thermally cracked residue is rather high. For, though during the thermal cracking the heavy hydrocarbon oils are converted to lower-boiling compounds, the asphaltenes æe concentrated in the residue. ~breover, new asphaltenes are formed during the cracking opera~ion. The possibility of creating an asphaltenes overbalanoe is substantially excluded if the naximum distillation temperature in the process according to the invention is below the boiling point of 540C/bar-hydrocarbons, preferably of 510C/b æ-hydroc æbons. Suitably, the bituminous composition contains from 5 to 60%w of the bitumen prepæed according to the invention and 95 to 40~w of at least one other bitumen component. A person skilled in the æ t will be able to select the proper other bitumen oomponent(s) in accordance with his desires. & itable other bitumen CQmponents include straight-run bitumen, propane bitumen, bright stock extracts such as furfural extracts. The components may be blown or unblown and may or may not contain flux oils. Criteria on which the other bitumen BN43.008 7~'3f~
components are selected comprise the volatility, density, penetration, softening point etc, as can be determined by the person skilled in the art.
It is evident that the bituminous compositions according to the present invention may contain other additives such as diluents and/or polymers, in particular styrene-butadiene or styrene-isoprene block copolymers or atactic polypropene.
The invention will be further elucidated by means of the following examples.
EX~MPLE I
In this Example some characteristics of thermally cracked residues were determuned. Residue I was a thermally cracked residue which has not been subjected to a flashing step.
Residue II is obtained after flashing Residue I at 364C/30 mmHg (4.0kPa), corresponding to 496/bar. Residue III is obtained after flashing Residue I at 330C/30 mmHg (4.0 kPa) corresponding to 460C/bar and a blowing step at an air consumption of 20-30 Nl/hg residue and at 280-300C. In a thin film oven test (TFOT, ASTM D1754) the residues were subjected to heat (163C) and air, and their ageing behaviour was determined.
After the test the penetration was measured and compared with the original penetration, yielding a retained-penetration value (in %). m e higher the retained penetration, the better is the residue able to stand up against heat and air. The loss of weight during the test was determined as well; and also the change in the ~oftening point, determined by the Ring and Bell method was measured ( R & B). me results are indicated in Table I.
BN43.008 TABLE I
Residue I II III
Penetration/25C, dmm 71 81 85 Softening point R & B, C 52 46 48 Flash point, C 210 320 316 TFOT (163C) Loss on heating, % m/m 1.8 -0.08 0.06 Retained penetration, % 46 62 57 R & B, C 14 5 6 From comparison of the results of Residues I and II it is apparent that bitumen prepared according to the invention has improved ageing behaviour as shcwn by the higher retained penetration, no loss on heating and a smaller change in the softening point. Comparison between the results of Residues II
and III teaches that the similar characteristics can be obtained by some milder flashing followed by blowing.
EXAMPLE II
For a number of campositions their suitability for use in asphalt mlxes was tested. Therefore asphalt mixes were subjected to the Marshall test, extended for retained Marshall values upon storage of the mixes for tw~ weeks in water at 60C, to obtain information on the sensitivity of the stability of the mix towards water.
The mixes contained 6.0% m/m of bituminous composition, based on 100% m/m of mineral aggregate, with a typical void content of 2% v/v.
The bitumunous oomposition consists of a Middle East, short residue and vacuum-flashed thermally cracked residue, flashed at conditions corresponding to 495C/bar. The results are indicated in Table II.
BN43.008 I~BLE II
Composition cracked ShortRetained Marshall No. residue residuevalue, %
~w %w Similar tests were carried out with bitumlnous compositions in asphalt muxes, which compositions consisted of propane bitumen (PB), bright stock furfural extract (BFE) and vacuum-flashed thenmally cracked residue (VFCR) flashed at conditions corresponding to 500C/bar. The retained Marshall values for the compositions are indicated in Table III.
TABLE III
No. Bituminous composition Retained Marshall VFCR PB BFE Value, ~
%w %w %w From the above results it is apparent that the bituminous compositions according to the invention have excellent water resistance.
BN43.008 EXP~PLE III
Compositions 6 and 7 of E~a~ple II were subjected to a fretting test in which the percentage of abraded material was determuned after storage in water for 240 hours at 40C. The test is described in "Proceedings of APPT, 463, v~l. 32, pp.
380-411.
The smaller the loss of material, the better was the resistance to abrasion and fretting. The results are indicated in Table IV.
TABLE IV
No. Bituminous composition Loss of surface VFCR PB BFE material, %w %w %w g 621 42 37 29.2 743 37 20 25.1 From these results it is apparent that the composition with the higher VFCR content has even improved fretting and abrasion resistance.
BN43.008
It has now been found that a specific process for handling a thermally cracked feedstock yields bitumen having excellent resistances against fretting and water ingress and showing satisfactory stability and ageing properties.
The invention therefore provides a process for the preparation of bitumen in which a residual fraction of a thermally cracked hydrocarbon feedstock is distilled under subatmospheric pressure of between 2 to 120 mmHg (0.27 to 16.0kPa) at a maximum distillation temperature of between 310 to 370C that corresponds with the boiling point at the subatmospheric pressure of hydrocarbons having an atmospheric boiling point of 455-540C and at least a part of the distillation residue is recovered as bitumen.
The reference to the hydrocarbons boiling point at atmospheric pressure is made after conversion of a subatmospheric boiling point in accordance with (the Maxwell-Bonnell relation described in Ind. Eng. Chem. r 49 (1957) 1187-1196). In practice a boiling point of a hydrocarbon ls determlned under subatmospheric pressure. Since at many subatmospheric pressures many different bolling points can be determined the person skilled in the art prefers to refer to an unambiguous converted atmospheric boiling point.
The maximum distillation temperature should not be below the boiling point of hydrocarbons with an atmospheric boiling point of 455C (455C/bar-hydrocarbons), since otherwise an unsatisfactory removal of relatively light hydrocarbons would be 1~7~
-2a- 63293-2775 obtained, which would result in relatively unstable and rapidly ageing bitumen, just as described in the above articles from Fuel.
On the other hand, if the maximum temperature would exceed the 540C/bar-hydrocarbons boiling point the resulting residue would be too hard to be suitable for use in e.g. road asphalt and may give rise to incompatibllity problems when used in bitumen blends.
t 1~7~
me residual fraction subjected to the subatmospheric distillation can be almost any fraction fro~ the thermal cracking unit. It is advisable to send the thermally cracked product to an atmospheric distillation unit to separate S distillate products such as gases, gasoline, kerosene and gas oils from the atmospheric residue. Conveniently this a~spheric residue is sent to the subatmospheric distillation.
The atmospheric distillation is suitably carried out at a botton temperature of from 300 to 370C. Hence, the residual fraction sent to the subatmospheric distillation suitably has at least 80~w of components having an atmospheric boiling point of at least 300C.
Thermal cracking is a rather simple cracking process. At a temperature level of about 400 to 500C the longer hydrocarbons become unstable and tend to break into smaller molecules of all possible sizes and types. m e feedstock for thermal cracking is generally a mixture of complex heavy hydrocarbons left over from an atmospheric or vacuum distillation of a crude oil.
Visbreaking, i.e. reducing viscosity by breaXing of molecules, is an important application of thermal cracking because it reduces the viscosity of the residue obtained after the thermal cracking considerably. Visbreaking is carried out by sending a feed after appropriate preheat to a furnace for heating the feed to the cracking temperature. From there the feed is fed into a soaker dcwnstream of the furnace where most of the cracking takes place. The soaker has suitably internal baffles to prevent too much back-mixing. The products are gas, distillates and residue. This residue has a lower viscosity than the feed.
Preferably such a residue, i.e. the residue of a visbroken hydrocarbon feed, is used as the residual fraction in the process according to the present invention. The visbreaking conditions are suitably a pressure of from 2 to 30 bar, a temperature of 400 to 500C and a residence time of from 5 to 60 min.
BN43.008 1~79S9~
The residual fraction is distilled under subatmospheric pressure. This includes that it is subjected to a conventional vacuum distillation, provided that the requirement as to the maximum distillation temperature is met. It is, however, preferred to subject the residual fraction to flash distillation.
In flash distillation the residual fraction is heated to a temperature within the boiling range at a lower pressure of the liquid and introduced into a subatmospheric flash zone to yield distillate and residue. The residue is at least partly recovered as bitumen.
Many subatmospheric presæures can be uæed in the process according to the invention. Each pressure applied determines the temperature limits within which the distillation has to be carried out.
As stated hereinbefore, the maximum distillation temperature is selected such that on the one hand a satisfactory removal of relatively light hydrocarbons is obtained but on the other hand the formation of an unacceptably hard bitumen is avolded. Preferably, the maximum distillation temperature corresponds with the boiling point of 460-510C/bar-hydrocarbons.
The bitumen prepared according to the invention has satisfactory ageing and stability properties. To even improve the oxidation stabllity the bottom fraction of the distillation is preferably at least partly subjected to blowing before being 9~
recovered as the desired bitumen. The blcwing process is generally carried out continuously in a blowing column, into which liquid bitumen is fed and wherein the liquid level is kept approximately constant by withdrawing bitumen ne æ the bottom.
Air is blown through the liquid mass via an air distributor at the bottom of the column. Suitable blowing te~çeratures are 170-320C, in particulæ 220-275C.
It is known in the art to blend væ ious types of bitumen to obtain a bitumen composition having the desired properties. me present invention further provides bituminous compositions comprising bitumen prepared in a pro oe ss according to the present invention. It should, however, be avoided that such a bituminous composition contains an overbalance of asphaltenes sin oe in such compositions heterogeneity may occur. mere is a chance of creating an overbalan oe of asphaltenes when a thermally cracked residue is used as blending component, since it is known, e.g. from the above-mentioned articles in Fuel, that the asphaltene content in thermally cracked residue is rather high. For, though during the thermal cracking the heavy hydrocarbon oils are converted to lower-boiling compounds, the asphaltenes æe concentrated in the residue. ~breover, new asphaltenes are formed during the cracking opera~ion. The possibility of creating an asphaltenes overbalanoe is substantially excluded if the naximum distillation temperature in the process according to the invention is below the boiling point of 540C/bar-hydrocarbons, preferably of 510C/b æ-hydroc æbons. Suitably, the bituminous composition contains from 5 to 60%w of the bitumen prepæed according to the invention and 95 to 40~w of at least one other bitumen component. A person skilled in the æ t will be able to select the proper other bitumen oomponent(s) in accordance with his desires. & itable other bitumen CQmponents include straight-run bitumen, propane bitumen, bright stock extracts such as furfural extracts. The components may be blown or unblown and may or may not contain flux oils. Criteria on which the other bitumen BN43.008 7~'3f~
components are selected comprise the volatility, density, penetration, softening point etc, as can be determined by the person skilled in the art.
It is evident that the bituminous compositions according to the present invention may contain other additives such as diluents and/or polymers, in particular styrene-butadiene or styrene-isoprene block copolymers or atactic polypropene.
The invention will be further elucidated by means of the following examples.
EX~MPLE I
In this Example some characteristics of thermally cracked residues were determuned. Residue I was a thermally cracked residue which has not been subjected to a flashing step.
Residue II is obtained after flashing Residue I at 364C/30 mmHg (4.0kPa), corresponding to 496/bar. Residue III is obtained after flashing Residue I at 330C/30 mmHg (4.0 kPa) corresponding to 460C/bar and a blowing step at an air consumption of 20-30 Nl/hg residue and at 280-300C. In a thin film oven test (TFOT, ASTM D1754) the residues were subjected to heat (163C) and air, and their ageing behaviour was determined.
After the test the penetration was measured and compared with the original penetration, yielding a retained-penetration value (in %). m e higher the retained penetration, the better is the residue able to stand up against heat and air. The loss of weight during the test was determined as well; and also the change in the ~oftening point, determined by the Ring and Bell method was measured ( R & B). me results are indicated in Table I.
BN43.008 TABLE I
Residue I II III
Penetration/25C, dmm 71 81 85 Softening point R & B, C 52 46 48 Flash point, C 210 320 316 TFOT (163C) Loss on heating, % m/m 1.8 -0.08 0.06 Retained penetration, % 46 62 57 R & B, C 14 5 6 From comparison of the results of Residues I and II it is apparent that bitumen prepared according to the invention has improved ageing behaviour as shcwn by the higher retained penetration, no loss on heating and a smaller change in the softening point. Comparison between the results of Residues II
and III teaches that the similar characteristics can be obtained by some milder flashing followed by blowing.
EXAMPLE II
For a number of campositions their suitability for use in asphalt mlxes was tested. Therefore asphalt mixes were subjected to the Marshall test, extended for retained Marshall values upon storage of the mixes for tw~ weeks in water at 60C, to obtain information on the sensitivity of the stability of the mix towards water.
The mixes contained 6.0% m/m of bituminous composition, based on 100% m/m of mineral aggregate, with a typical void content of 2% v/v.
The bitumunous oomposition consists of a Middle East, short residue and vacuum-flashed thermally cracked residue, flashed at conditions corresponding to 495C/bar. The results are indicated in Table II.
BN43.008 I~BLE II
Composition cracked ShortRetained Marshall No. residue residuevalue, %
~w %w Similar tests were carried out with bitumlnous compositions in asphalt muxes, which compositions consisted of propane bitumen (PB), bright stock furfural extract (BFE) and vacuum-flashed thenmally cracked residue (VFCR) flashed at conditions corresponding to 500C/bar. The retained Marshall values for the compositions are indicated in Table III.
TABLE III
No. Bituminous composition Retained Marshall VFCR PB BFE Value, ~
%w %w %w From the above results it is apparent that the bituminous compositions according to the invention have excellent water resistance.
BN43.008 EXP~PLE III
Compositions 6 and 7 of E~a~ple II were subjected to a fretting test in which the percentage of abraded material was determuned after storage in water for 240 hours at 40C. The test is described in "Proceedings of APPT, 463, v~l. 32, pp.
380-411.
The smaller the loss of material, the better was the resistance to abrasion and fretting. The results are indicated in Table IV.
TABLE IV
No. Bituminous composition Loss of surface VFCR PB BFE material, %w %w %w g 621 42 37 29.2 743 37 20 25.1 From these results it is apparent that the composition with the higher VFCR content has even improved fretting and abrasion resistance.
BN43.008
Claims (9)
1. Process for the preparation of bitumen in which a residual fraction of a thermally cracked hydrocarbon feedstock is distilled under subatmospheric pressure of between 2 to 120 mmHg (0.27 to 16.0kPa) at a maximum distillation temperature of between 310 to 370°C that corresponds with the boiling point at the subatmospheric pressure of hydrocarbons having an atmospheric boiling point of 455-540°C and at least a part of the distillation residue is recovered as bitumen.
2. Process according to claim 1 in which the residual fraction is the residue of a visbroken hydrocarbon feed.
3. Process according to claim 2 in which the hydrocarbon feed has been visbroken at a pressure of from 2 to 30 bar, a temperature of from 400 to 500°C and at a residence time of from 5 to 60 minutes.
4. Process according to claim 1, 2 or 3, in which the residual fraction is subjected to flash distillation.
5. Process according to claim 1, 2 or 3 in which the maximum distillation temperature corresponds with the boiling point at the subatmospheric pressure of hydrocarbons having an atmospheric boiling point of 460 to 510°C.
6. Process according to claim 1, 2 or 3, in which the bottom fraction of the distillation is subjected to blowing before being recovered as bitumen.
7. Bitumen, whenever prepared with the process according to claim 1.
8. Bituminous composition comprising bitumen according to claim 7.
9. Bituminous composition according to claim 8 which comprises 5 to 60%w of the bitumen according to claim 7 and 95 to 40%w of at least one another bitumen component.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB868608302A GB8608302D0 (en) | 1986-04-04 | 1986-04-04 | Preparation of bitumen |
| GB8608302 | 1986-04-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1279598C true CA1279598C (en) | 1991-01-29 |
Family
ID=10595714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000531700A Expired - Fee Related CA1279598C (en) | 1986-04-04 | 1987-03-11 | Process for the preparation of bitumen |
Country Status (12)
| Country | Link |
|---|---|
| EP (1) | EP0240090B1 (en) |
| JP (1) | JPH0830192B2 (en) |
| CN (1) | CN1015111B (en) |
| AR (1) | AR248420A1 (en) |
| AU (1) | AU591765B2 (en) |
| BR (1) | BR8701512A (en) |
| CA (1) | CA1279598C (en) |
| DE (1) | DE3764133D1 (en) |
| ES (1) | ES2016964B3 (en) |
| GB (1) | GB8608302D0 (en) |
| MY (1) | MY101289A (en) |
| ZA (1) | ZA872390B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1087766C (en) * | 1999-06-16 | 2002-07-17 | 刘景慧 | Equipment for producing road asphaltum using super thick oil as raw material |
| JP3848935B2 (en) * | 2003-06-30 | 2006-11-22 | 新日本石油株式会社 | Paving asphalt |
| CN103865557B (en) * | 2012-12-10 | 2015-10-28 | 中国石油天然气股份有限公司 | A kind of preparation method of building asphalt |
| EP2994520A2 (en) * | 2013-05-10 | 2016-03-16 | Statoil Canada Limited | Method and system for preparing a pipelineable hydrocarbon mixture |
| ES2877155T3 (en) * | 2014-11-13 | 2021-11-16 | Turkiye Petrol Rafinerileri A S Tupras | Modified bituminous composition doped with petroleum coke and extract for use in the production of asphalt and its production process |
| FR3113678B1 (en) * | 2020-08-31 | 2022-08-12 | Ifp Energies Now | BITUMEN CONTAINING UNCONVENTIONAL BITUMEN BASES |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1891890A (en) | 1928-07-10 | 1932-12-20 | Gasoline Prod Co Inc | Method of making asphalt |
| US2004210A (en) | 1929-11-25 | 1935-06-11 | Universal Oil Prod Co | Method of producing asphalt |
| US2305440A (en) * | 1940-07-25 | 1942-12-15 | Standard Oil Dev Co | Bitumen of high softening point |
| US2768119A (en) | 1952-12-31 | 1956-10-23 | Phillips Petroleum Co | Pitches from petroleum and process for producing same |
| US2850436A (en) * | 1954-03-16 | 1958-09-02 | Gulf Research Development Co | Method for the preparation of solid petroleum pitch |
| FR2510133A1 (en) * | 1981-07-23 | 1983-01-28 | Viabilite Ste Indle | Upgrading of steam-cracker tar by reduced-pressure distn. - after addn. of sulphur to increase softening point of residual pitch |
-
1986
- 1986-04-04 GB GB868608302A patent/GB8608302D0/en active Pending
-
1987
- 1987-03-11 CA CA000531700A patent/CA1279598C/en not_active Expired - Fee Related
- 1987-04-02 CN CN87102480A patent/CN1015111B/en not_active Expired
- 1987-04-02 MY MYPI87000417A patent/MY101289A/en unknown
- 1987-04-02 AR AR87307200A patent/AR248420A1/en active
- 1987-04-02 BR BR8701512A patent/BR8701512A/en not_active IP Right Cessation
- 1987-04-02 AU AU70995/87A patent/AU591765B2/en not_active Ceased
- 1987-04-02 ZA ZA872390A patent/ZA872390B/en unknown
- 1987-04-02 JP JP62082168A patent/JPH0830192B2/en not_active Expired - Lifetime
- 1987-04-03 DE DE8787200630T patent/DE3764133D1/en not_active Expired - Fee Related
- 1987-04-03 ES ES87200630T patent/ES2016964B3/en not_active Expired - Lifetime
- 1987-04-03 EP EP87200630A patent/EP0240090B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE3764133D1 (en) | 1990-09-13 |
| AR248420A1 (en) | 1995-08-18 |
| ES2016964B3 (en) | 1990-12-16 |
| EP0240090B1 (en) | 1990-08-08 |
| JPH0830192B2 (en) | 1996-03-27 |
| JPS62236888A (en) | 1987-10-16 |
| CN1015111B (en) | 1991-12-18 |
| GB8608302D0 (en) | 1986-05-08 |
| ZA872390B (en) | 1987-11-25 |
| CN87102480A (en) | 1987-10-14 |
| EP0240090A3 (en) | 1987-12-02 |
| BR8701512A (en) | 1988-01-19 |
| AU591765B2 (en) | 1989-12-14 |
| MY101289A (en) | 1991-09-05 |
| EP0240090A2 (en) | 1987-10-07 |
| AU7099587A (en) | 1987-10-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |