Purification and modification method of petroleum residual oil

A technology of petroleum residue and residue oil, which is applied in the field of purification and modification of petroleum residue, which can solve the problems that petroleum residue is not easy to use, and achieve the effects of low content of quinoline insolubles, reduced ash content, and high purification efficiency

Active Publication Date: 2020-08-18
北京先进碳能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem that petroleum residue oil is not easy to use in the prior art

Method used

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  • Purification and modification method of petroleum residual oil
  • Purification and modification method of petroleum residual oil
  • Purification and modification method of petroleum residual oil

Examples

Experimental program
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Effect test

Embodiment 1

[0037] A method for purifying and modifying petroleum residue, comprising the following steps:

[0038] 1. Preliminary removal of ash in residual oil: Put the residual oil in a heatable horizontal centrifuge at 10,000 rpm, heat it to 50°C, turn on the centrifuge for 10 minutes, and then take out the supernatant for later use.

[0039] 2. Macromolecularize the residual oil and remove the low-activity molecules: put the low-ash residual oil prepared in the first step in a high-pressure reactor, pressurize to 2MPa, react at 400°C for 4 hours, and then cool down to Atmospheric pressure distillation at 300°C for 30 minutes to remove low-activity molecules and small molecules produced by the reaction, leaving high-molecular-weight active heavy residue.

[0040]3. Extraction of solvent-soluble residues such as toluene, quinoline, and n-heptane solubles in heavy residue oil: mix heavy residue oil with 1 times the quality of mixed solvent (toluene: quinoline: n-heptane = 1 :1:1, mass ...

Embodiment 2

[0044] A method for purifying and modifying petroleum residue and a method for preparing mesophase pitch, comprising the following steps:

[0045] 1. Preliminary removal of ash in residual oil: Put the residual oil in a heatable horizontal centrifuge at 10,000 rpm, heat it to 50°C, turn on the centrifuge for 10 minutes, and then take out the supernatant for later use.

[0046] 2. Macromolecularize the residual oil and remove the low-activity molecules: put the low-ash residual oil prepared in the first step in a high-pressure reactor, pressurize to 10MPa, react at 500°C for 10 hours, and then cool down to Atmospheric distillation at 350°C for 60 minutes to remove low-activity molecules and small molecules produced by the reaction, leaving high-molecular-weight active heavy residue.

[0047] 3. Extraction of solvent-soluble residues such as toluene, quinoline, and n-heptane solubles in heavy residue oil: Mix heavy residue oil with 5 times the quality of mixed solvent (toluene: ...

Embodiment 3

[0051] A method for purifying and modifying petroleum residue and a method for preparing mesophase pitch, comprising the following steps:

[0052] The reaction conditions of this embodiment are all the same as in Example 1 except for the following differences.

[0053] Step 3, mix the heavy residue with 2 times the mass of mixed solvent (toluene: quinoline: n-heptane=1:2:2, mass ratio).

[0054] Step 4, put the solvent-soluble residue in the reaction kettle, add tetralin, put it into the reaction kettle at a rate of 0.2kg of tetralin per kilogram of solvent-soluble residue, and put it into the reaction kettle at a temperature of 450°C and a pressure of 2.00MPa React for 8 hours.

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Abstract

The invention discloses a purification and modification method of petroleum residual oil, wherein the method comprises the following steps: (1) carrying out a reaction of the residual oil at high temperature and high pressure for 4-10 h, and carrying out atmospheric distillation to obtain high-molecular-weight active heavy residual oil; (2) mixing the heavy residual oil with a mixed solvent of toluene, quinoline and n-heptane, heating for dissolving, taking supernatant, and distilling to obtain a toluene-quinoline-n-heptane co-soluble substance, namely solvent-soluble residual oil; and (3) uniformly mixing the solvent-soluble residual oil and tetrahydronaphthalene, heating and pressurizing to react for 5-10 h, and distilling to obtain a distillation product, namely light residual oil. Themesophase pitch prepared from the obtained light residual oil has the excellent characteristics of being proper in softening point, high in mesophase content, easy to graphitize and the like, and is particularly suitable for preparing high-performance mesophase pitch carbon fibers.

Description

technical field [0001] The invention belongs to the field of petrochemical industry and relates to a purification and modification method of petroleum residue. [0002] technical background [0003] Mesophase pitch is a bituminous substance mainly composed of aromatic compounds. It is a mixture of flat disk-shaped condensed ring aromatic hydrocarbons with a relative molecular mass of 370-2000. It has a large C / H ratio (such as 1.72) and the softening point is mostly Between 205 and 285°C, sometimes as high as 300°C or more. When the temperature is above the softening point, it generally has a lower melt viscosity, and can remain stable without decomposing for a long time, so as to facilitate the subsequent processing operation of the liquid crystal melt. In addition, the density, heat capacity, and especially the viscosity of mesophase pitch also have obvious temperature dependence. Mesophase pitch has an obvious layered structure after melting, and is easily graphitized by...

Claims

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Application Information

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IPC IPC(8): C10G53/04
CPCC10G53/04
Inventor 王新筑
Owner 北京先进碳能科技有限公司
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