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Method for preparing coal tar pitch having improved compatibility with asphalt and asphalt containing the same

A technology for coal tar pitch and coal tar, which is applied in the field of preparation of pitch and can solve the problems of not considering the improvement of the compatibility of petroleum pitch, and it is difficult to improve the compatibility of coal tar pitch.

Active Publication Date: 2012-07-04
SK INNOVATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, there is no direct relationship between conventional patents dealing with reducing the content of toluene insolubles and reducing the content of trichlorethylene insolubles (involving the purity of bitumen)
Furthermore, none of these patents considers improving the compatibility with petroleum pitch, making it difficult to improve the compatibility of coal tar pitch (from which only toluene-insoluble materials have been removed) with petroleum pitch

Method used

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  • Method for preparing coal tar pitch having improved compatibility with asphalt and asphalt containing the same
  • Method for preparing coal tar pitch having improved compatibility with asphalt and asphalt containing the same

Examples

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Embodiment approach

[0021] According to another exemplary embodiment of the present invention, coal tar and naphtha cracking residue or oil slurry may be further mixed with a ketone solvent having a boiling point of, for example, less than or equal to about 200°C. Examples of ketone solvents may include saturated and unsaturated ketone compounds such as acetone, methyl ethyl ketone, diethyl ketone, pinacolone, isobutyl methyl ketone, diisopropyl ketone, methyl butyl ketone, dipropyl ketone , methyl vinyl ketone, methyl heptanone, cyclopentanone, cyclohexanone, ethylpentyl ketone, hexyl methyl ketone, etc., which may be used alone or in combination. Particularly useful are acetone, methyl ethyl ketone or mixtures thereof.

[0022] According to an exemplary embodiment, coal tar, naphtha cracking residue or oil slurry, and a ketone solvent are mixed under agitation (at a rotation speed of about 100 rpm to 1,000 rpm, especially about 200 rpm to 500 rpm), and the resulting mixture is centrifuged (suc...

Embodiment 1

[0032] The first mixture (coal tar: naphtha cracking residue = 5: 1), the second mixture (coal tar: oil slurry = 5: 1) and crude coal tar were subjected to atmospheric distillation respectively at 250 ° C, and then The atmospheric distillation residue was subjected to vacuum distillation at 360° C. to recover coal tar pitch. Afterwards, the obtained coal tar pitch was mixed with petroleum pitch (AP-5, SK energy company) at a weight ratio of 5 (petroleum pitch): 1 (coal tar pitch) at 150° C. and 300 rpm under stirring conditions to prepare Three bitumen samples containing coal tar pitch. The content of trichlorethylene insolubles in coal tar pitch and the properties of pitch containing coal tar pitch were measured. The results are shown in Table 1 and Table 2 below.

[0033] Table 1

[0034] Comparison of Trichlorethylene Insoluble Content in Three Coal Tar Pitch Samples

[0035] Trichlorethylene insoluble content (weight%) first mixture 7％ second...

Embodiment 2

[0041] Under the rotating speed of 3,000rpm, the third mixture (coal tar:naphtha cracking residue:acetone=5:1:1), the fourth mixture (coal tar:oil slurry:acetone=5:1:1), The fifth mixture (coal tar:acetone=5:1) and crude coal tar were centrifuged, and then the supernatant from which the precipitate had been removed was subjected to atmospheric distillation at 250°C. This atmospheric distillation residue was subjected to vacuum distillation at 360°C to obtain coal tar pitch. After that, the obtained coal tar pitch and petroleum pitch (AP-5, SK Energy) were mixed at a weight ratio of 5 (petroleum pitch): 1 (coal tar pitch) at 150° C. and 300 rpm under stirring conditions to prepare four A bitumen sample containing coal tar pitch. The content of trichlorethylene insoluble matter in coal tar pitch and the properties of pitch containing coal tar pitch were measured. The results are shown in Table 3 and Table 4 below.

[0042] table 3

[0043] Comparison of Trichlorethylene Ins...

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Abstract

The invention relates to a method for preparing coal bar pitch having improved compatibility with asphalt and asphalt containing the same, with the prepared pitch applicable to road paving and comprising the mixture of coal tar pitch and petroleum asphalt. The method is characterized by employing oil fraction having large quantity of aromatic ingredients to prepare the coal tar pitch having improved compatibility with asphalt, thus to inhibit the increase of the triclene undissolved substance and the separation of the material while the coal tar pitch and the petroleum asphalt are simply mixed. The invention also relates to a method for preparing the pitch containing the coal tar pitch. The pitch containing coal tar pitch can be employed as road-paving material effectively.

Description

[0001] Cross references to related patent applications [0002] This patent application is required to be submitted on October 22, 2010, and the name is "Method for preparing coal tar pitch having improved compatibility with asphalt and asphalt containing the same" (coal tar pitch with improved compatibility with petroleum pitch and containing the same The priority of Korean Patent Application No. 2010-0103628 of Coal Tar Pitch Production Method, the entire content of which is incorporated in this application by reference. technical field [0003] The present invention relates to a method for preparing coal tar pitch with improved compatibility with petroleum asphalt by using aromatic oil fractions, and a method for preparing pitch containing coal tar pitch suitable for paving roads. Background technique [0004] Bitumen has long been used in road paving, and with the introduction and development of the oil refining process in the late 1800s, the demand for bitumen, a by-pro...

Claims

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Application Information

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IPC IPC(8): C10C1/16C10C1/18C10C1/00C10C3/00
CPCC10C1/04C10C3/00C10C3/005
Inventor 黄亨基金祐成金周会金奎泰朴三龙曹太铉
Owner SK INNOVATION CO LTD
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