EP0078701A2 - Verfahren zur Herstellung von modifizierten Asphalten - Google Patents

Verfahren zur Herstellung von modifizierten Asphalten Download PDF

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Publication number
EP0078701A2
EP0078701A2 EP82305812A EP82305812A EP0078701A2 EP 0078701 A2 EP0078701 A2 EP 0078701A2 EP 82305812 A EP82305812 A EP 82305812A EP 82305812 A EP82305812 A EP 82305812A EP 0078701 A2 EP0078701 A2 EP 0078701A2
Authority
EP
European Patent Office
Prior art keywords
sulfur
asphalt
oxidant
contacting
temperature
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.)
Granted
Application number
EP82305812A
Other languages
English (en)
French (fr)
Other versions
EP0078701A3 (en
EP0078701B1 (de
Inventor
Bernard Chavet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ExxonMobil Technology and Engineering Co
Original Assignee
Exxon Research and Engineering Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Exxon Research and Engineering Co filed Critical Exxon Research and Engineering Co
Publication of EP0078701A2 publication Critical patent/EP0078701A2/de
Publication of EP0078701A3 publication Critical patent/EP0078701A3/en
Application granted granted Critical
Publication of EP0078701B1 publication Critical patent/EP0078701B1/de
Expired legal-status Critical Current

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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
    • C10C3/02—Working-up pitch, asphalt, bitumen by chemical means reaction
    • C10C3/04—Working-up pitch, asphalt, bitumen by chemical means reaction by blowing or oxidising, e.g. air, ozone

Definitions

  • This invention relates to a process for preparing modified asphalts.
  • asphalt is employed herein synonymously with the term bitumen.
  • a process for modifying asphalt by contacting the asphalt with an oxidant, optionally in the presence of a catalyst, wherein the asphalt is contacted with a liquid or gaseous oxidant at a temperature of 140°C to 170°C for a period up to one hour, such that the softening point of the asphalt is not materially altered and the reactivity of the asphalt toward sulfur is decreased.
  • solid oxidants for example, chromium trioxide and phosphorus pentasulfide are not suitable for use in invention.
  • a suitable liquid oxidant is hydrogen peroxide.
  • the oxidant is air or oxygen.
  • the temperature of contact is in the range 140°C to 170°C, more especially 145°C to 155°C. It is preferred that the duration of the contact is not more than one hour, typically 10 to 20 minutes depending on the feedstock being processed. In accordance with the invention the product is one in which the softening point of the starting material is not significantly altered.
  • the product of such a process is a deliberately mildly oxidized asphalt and hence is very different from the well-known oxidized or "blown" asphalt products which are normally prepared by oxidation for from 4 to 8 hours at 240°C to 290°C.
  • the product is also very different from that disclosed in United Kingdom Patent 278,679 published in 1928.
  • the disclosure there is of a tar, tar oil or anthracene oil oxidised with air, or a liquid oxidant such nitric acid, to an extent that the product (i) retains a sufficient degree of fluidity (ii) is insensitive to water, so that it can be directly used in road construction.
  • the mildly oxidised product of the present invention is especially suitable for the preparation of asphalt/sulfur/ materials, preferably with sulfur which is not chemically bound or combined.
  • a sulfur-modified asphalt is obtained by blending the mildly oxidised product with sulfur at a temperature in the range 1200C to 170°C.
  • the steps of contacting with the oxidant and with the sulfur are preferably conducted at substantially the same temperature in the range 140 C to 170°C, more especially 145 C to 155 C .
  • the step of contacting with sulfur need not necessarily immediately follow the mild oxidant but can, if desired, follow later, for example, at a road-making site.
  • the sulfur may be employed in amount from up to 45 wt%, more especially 30 wt %.
  • the asphalt feedstock employed in processes of the invention may be any one of the known non-oxidized materials, for example, the penetration grade asphalts such as 40/60 to 180/220, preferably 80/100.
  • the penetration grade asphalts such as 40/60 to 180/220, preferably 80/100.
  • such softer petroleum residua can be employed, for example,;those with penetrations of about 600, or higher, including the light 600-800 grade (ASTM D 5).
  • Table 1 shows for each material its crude oil origin, its penetration and the said H 2 S quantity evolved.
  • the first six materials show essentially the same reactivity to sulfur, independent of the crude oil origin. Moreover, as indicated by Tests 2 and 3, the reactivity is substantially independent of the penetration, so that short and long run vacuum residua produced from the same crude oil behave substantially similarly when treated with the sulfur.
  • Tests Nos 7 and 8 were conducted with two different blends of straight run vacuum residua and oxidized vacuum residua, that is to say the normal fully oxidized material.
  • the blends show less reactivity with sulfur under the stated conditions.
  • Tests 9 and 10 were conducted with two mildly blown materials made in accordance with the invention. Both materials show a considerably reduced reactivity with sulfur under the stated conditions, the origin of crude oil being unimportant. It will be seen that the reactivity is appreciably less than even the blends 7 and 8; indicating that the results obtainable by means of the invention cannot be achieved by mere blending of known blown and un-blown materials.
  • Example 2 In order to illustrate suitable conditions for conducting the mild oxidation, a series of air blowing experiments was conducted on some asphalt materials at 150°C or 165°C and for oxidation times in the range 5 to 60 minutes.
  • the asphalts employed were (1) a straight run vacuum residuum from an Arabian Light crude (2) a blend of straight run vacuum residuum having a penetration 80 to 100 and (3) a straight run vacuum residuum of penetration 80 to 100 from an Arabian Heavy crude oil.
  • Fig 1 is a plot of relative reactivity of the various oxidized materials thus produced with sulfur, against oxidation time. With all materials H 2 S is reduced by 50% after only 15 mins air blowing, and by 75% after 1 hour.
  • Example 3 This example illustrates that the mildly oxidized product of the invention retains its low reactivity to sulfur over a storage period at 150°C of ten or more days. This is very important in practice in that the oxidized product can be made and hot-stored in one location and thereafter blended with sulfur at another location days later.
  • Fig 2 shows the results obtained with an asphalt of penetration 80 to 100 from an Arabian Heavy crude and a residue from the vacuum distillation of an Arabian Light crude. The figure clearly shows that even after 10 days storage, both products are still considerably less reactive with sulfur then the corresponding unblown materials.
  • the sulfur-modified, mildly oxidized asphalts of the invention have considerable importance as binding agents in road-making and road-surfacing operations, among other uses.
  • H 2 S evolution has hitherto presented problems which sometimes rule out the possibility of using sulfur-modified asphalts even though they have desirable properties.
  • H 2 S evolution can be reduced, thereby widening the practical scope of use of sulfur-modified asphalts, since the important properties of those are not significantly affected in the products according to the present invention.

Landscapes

  • Chemical & Material Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Materials Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Working-Up Tar And Pitch (AREA)
EP19820305812 1981-11-06 1982-11-02 Verfahren zur Herstellung von modifizierten Asphalten Expired EP0078701B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8133560 1981-11-06
GB08133560A GB2108998A (en) 1981-11-06 1981-11-06 Modified asphalts

Publications (3)

Publication Number Publication Date
EP0078701A2 true EP0078701A2 (de) 1983-05-11
EP0078701A3 EP0078701A3 (en) 1984-02-22
EP0078701B1 EP0078701B1 (de) 1986-01-15

Family

ID=10525694

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820305812 Expired EP0078701B1 (de) 1981-11-06 1982-11-02 Verfahren zur Herstellung von modifizierten Asphalten

Country Status (3)

Country Link
EP (1) EP0078701B1 (de)
DE (1) DE3268597D1 (de)
GB (1) GB2108998A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3630789A1 (de) * 1986-09-10 1987-01-29 Al Douri Amad Dipl Ing Verfahren zur herstellung von oxidationsbitumen durch reaktion mit luft in gegenwart von radikalbildnern
RU2149170C1 (ru) * 1999-10-06 2000-05-20 Ненахов Михаил Николаевич Способ получения битума из малосернистых, и/или сернистых, и/или высокосернистых нефтей
CN100365098C (zh) * 2004-10-29 2008-01-30 中国石油化工股份有限公司 一种水工沥青的制备方法

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7374659B1 (en) 2004-06-22 2008-05-20 Asphalt Technology, Llc. Methods and systems for modifying asphalts
US7906011B2 (en) 2008-06-13 2011-03-15 Asphalt Technology Llc Methods and systems for manufacturing modified asphalts
CN106433730A (zh) * 2016-11-14 2017-02-22 广西泓达生物能源科技有限公司 一种沥青轻度氧化加工方法
CN113046109B (zh) * 2021-03-11 2021-12-07 山西中科化美科技有限责任公司 一种低硫低氮环保沥青的制备方法及应用

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR778523A (fr) * 1934-07-12 1935-03-18 Procédé pour modifier le pouvoir adhésif des goudrons et des hydrocarbures analogues et pour modifier les sous-produits que l'on en retire
US2182837A (en) * 1936-02-25 1939-12-12 Texas Gulf Sulphur Co Method of paving
US2148869A (en) * 1936-10-30 1939-02-28 Standard Oil Co Manufacture of asphalt
FR1435913A (fr) * 1965-02-23 1966-04-22 Raffinage Cie Francaise Bitumes émulsionnables et leur procédé de fabrication
FR1567671A (de) * 1968-06-04 1969-05-16

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3630789A1 (de) * 1986-09-10 1987-01-29 Al Douri Amad Dipl Ing Verfahren zur herstellung von oxidationsbitumen durch reaktion mit luft in gegenwart von radikalbildnern
RU2149170C1 (ru) * 1999-10-06 2000-05-20 Ненахов Михаил Николаевич Способ получения битума из малосернистых, и/или сернистых, и/или высокосернистых нефтей
CN100365098C (zh) * 2004-10-29 2008-01-30 中国石油化工股份有限公司 一种水工沥青的制备方法

Also Published As

Publication number Publication date
DE3268597D1 (en) 1986-02-27
EP0078701A3 (en) 1984-02-22
GB2108998A (en) 1983-05-25
EP0078701B1 (de) 1986-01-15

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