High Quality Asphalt Containing Pitch and Method of Preparing the Same

a technology of high-quality asphalt and containing wax, which is applied in the direction of working-up pitch/asphalt/bitumen by mixing fractions, hydrocarbon oil treatment, etc., can solve the problems of low yield upon operation of vacuum distillation unit to ensure the quality of asphalt, low quality of relatively expensive vacuum gas oil, etc., and achieves superior wax content and ductility. , the effect of high quality

Inactive Publication Date: 2008-09-04
SK INNOVATION CO LTD 50 ASSIGNMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0007]Leading to the present invention, intensive and thorough research on high quality asphalt and preparation methods thereof, carried out by the present inventors aiming to avoid the problems encountered upon direct production of a vacuum residue into high quality asphalt as mentioned above, resulted in the finding that a solvent deasphalting process is used to produce pitch having a controlled chemical composition, which is then mixed with a typical vacuum residue and a similar light petroleum distillate, thus producing high quality asphalt having superior wax content and ductility after a thin film oven test.
[0008]As object of the present invention is to provide high quality asphalt having superior wax content and ductility after a thin film oven test.

Problems solved by technology

However, because the price of the crude oil is a significant portion of the operating expense of refining plants, economic benefits may be undesirably negated.
In addition, direct production of the vacuum residue into high quality asphalt suffers because a vacuum gas oil produced along with the vacuum residue using the vacuum distillation unit is used as a feedstock of high-value processes such as hydrocracking and fluid catalytic cracking, undesirably causing low quality of relatively expensive vacuum gas oil or low yield upon operation of the vacuum distillation unit to ensure the quality of asphalt.
Upon vacuum distillation, since the vacuum gas oil and the vacuum residue are separated from each other due to the separation temperatures thereof, it is difficult to selectively increase the amounts of aromatic and resin in the vacuum residue from the point of view of the chemical structure in order to improve the wax content and ductility after a thin film oven test.

Method used

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  • High Quality Asphalt Containing Pitch and Method of Preparing the Same
  • High Quality Asphalt Containing Pitch and Method of Preparing the Same

Examples

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Effect test

example 1

[0027]A feedstock comprising the atmospheric residue (AR) and the vacuum residue (VR) having the properties shown in Table 1, mixed at a volume ratio of 18:11, was subjected to solvent deasphalting under the conditions shown in Table 2 below, thus producing deasphalted oil and pitch. The results are shown in Table 3 below. In order to control the penetration of the pitch thus obtained, a heart cut vacuum residue was further added, leading to asphalt. The properties of the asphalt thus obtained are shown in Table 4 below.

[0028]As is apparent from Table 4, in the case where the asphalt was prepared using the pitch, it had higher amounts of aromatic and resin and a lower amount of saturate than those of conventional asphalt obtained from the vacuum residue produced using a vacuum distillation unit, and thus high quality asphalt having low wax content and high ductility after a thin film oven test could be produced. Since the penetration of the asphalt was lower by about 6 than that of ...

example 2

[0029]A feedstock comprising the atmospheric residue and the vacuum residue having the properties shown in Table 1, mixed at a volume ratio of 18:11, was subjected to solvent deasphalting under the conditions shown in Table 5 below, thus obtaining deasphalted oil and pitch. The results are given in Table 6 below. The pitch thus obtained was mixed with the vacuum residue and then with the heart cut vacuum residue to control the penetration thereof, leading to asphalt. The properties of the asphalt thus obtained are shown in Table 7 below.

[0030]As is apparent from Table 7, the asphalt prepared using the pitch was confirmed to have ductility after a thin film oven test that was superior to that of asphalt produced from the vacuum residue under the same penetration conditions.

TABLE 5Conditions of Solvent Deasphalting: 70% PitchFeedAR / VR (18 / 11 vol.)SolventPropanePitch Yield, wt %70Pressure, kg / cm2g45.7Temp. of Asphaltene Separator, ° C.88

TABLE 6Feed of Solvent Deasphalting and Propertie...

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Abstract

A high quality asphalt containing pitch is generated as a by-product in a solvent deasphalting process and a method of preparing the same. The pitch is obtained by subjecting a mixture comprising a first vacuum residue and a first petroleum distillate, which is lighter than the vacuum residue and has high amounts of aromatic and resin, to solvent deasphalting. The operation conditions of the solvent deasphalting process are appropriately controlled, such that aromatic and resin components contained in the atmospheric residue and vacuum residue can be distributed to the pitch, and as well, a saturate can be removed.

Description

TECHNICAL FIELD[0001]The present invention relates, generally, to high quality asphalt containing pitch that is generated as a by-product in a solvent deasphalting process and a method of preparing the same, and more particularly, to high quality asphalt in which wax content and ductility after a thin film oven test are improved by mixing a typical vacuum residue with pitch that has a controlled chemical composition and is obtained from a mixture comprising an atmospheric residue and a petroleum distillate similar to the atmospheric residue using a solvent deasphalting unit, and to a method of preparing such high quality asphalt.BACKGROUND ART[0002]According to a conventional method of preparing asphalt using a vacuum distillation unit as shown in FIG. 1, an atmospheric residue produced using a crude distillation unit is subjected to a vacuum distillation process to separate a vacuum residue having controlled penetration, which is then directly produced into asphalt.[0003]The asphal...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C10C3/06
CPCC10C3/00C10C3/005C10G21/003C10G2300/44C10G2300/107C10G2300/1074C10G2300/1077C10G2300/4025
Inventor YOO, IK SANGKIM, MYUNG JUNCHA, SOON MANKIM, GYOO TAEKIM, CHEOL JOONGKIM, KI BYUNGPARK, SUNG BUMHWANG, YOON MANG
Owner SK INNOVATION CO LTD 50 ASSIGNMENT
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