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A method for removing olefins in mixed aromatics

A mixed aromatics and removal technology, applied in the treatment of hydrocarbon oil, petroleum industry, and multi-stage series refining process treatment, etc., can solve the problems of short service cycle, secondary environmental pollution, and rapid deactivation, and achieve extended use The effect of long life, extended operation cycle and simple process

Active Publication Date: 2017-01-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The price of activated granular clay is relatively low, and it has a good effect on removing olefins from benzene to xylene fractions. It is still used by most industrial devices. Its disadvantages are fast deactivation, short service life, and non-regeneration, such as for C 8 + The deolefinization of mixed aromatics usually needs to be replaced within one month. Frequent replacement results in a very large amount of clay usage, and also increases labor intensity and aromatics loss.
In addition, the deactivated aromatics-containing white clay is harmful to the human body and cannot be recycled. It can only be disposed of by landfill, which not only costs a lot of landfill costs, but also causes serious secondary pollution to the environment.

Method used

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  • A method for removing olefins in mixed aromatics
  • A method for removing olefins in mixed aromatics
  • A method for removing olefins in mixed aromatics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] This example is used to illustrate the method for removing olefins in mixed aromatics according to the present invention.

[0039] The thermal separator is set on the experimental device described in Comparative Example 1, and this thermal separator is a vertical container with external heating and insulation (such as figure 1 As shown), the volume is 650mL, and there is a temperature detection point inside; the height of the material inlet pipeline port is a quarter of the vertical height of the container, and the material outlet pipeline is located at the upper part of the container; the hemispherical area at the bottom of the container is the heavy component collection area, The lower part has a heavy component discharge outlet pipeline and an external discharge pipeline.

[0040] according to figure 1 According to the flow process, the raw material 1 described in Comparative Example 1 flows through the thermal separator before entering the reaction system, and part...

Embodiment 2

[0042] This example is used to illustrate the method for removing olefins in mixed aromatics according to the present invention.

[0043] Operate according to the method of Example 1, the difference is that 10mL molecular sieve refining catalyst (industrial brand is TOR-B, purchased from Hunan Jianchang Petrochemical Co., Ltd.) is filled in the deolefination reactor, and the weight of the catalyst is 6.7g. The reaction results are shown in Table 4.

Embodiment 3

[0045] This example is used to illustrate the method for removing olefins in mixed aromatics according to the present invention.

[0046] Operate according to the method of Example 1, the difference is that the heat separator provided on the experimental device is a horizontal container with external heating and insulation (such as figure 2 As shown), the volume is 1600mL, and there is also a temperature detection point inside; the material inlet line extends into one half of the vertical height of the container at one end of the upper part of the container, and the material outlet line is at the upper part of the other end of the container; the bottom of the container is equipped with A heavy component collection area with a diameter and height of 30mm, and a heavy component discharge pipeline at the lower part of the collection area. Raw material 1 flows through the heat separator under certain temperature, pressure and feed rate conditions, and the components flowing out f...

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Abstract

The invention relates to a method for removing olefin from mixed aromatics. The method comprises the following steps: performing heat exchange on a mixed aromatic raw material, filling into a heat separator, controlling the temperature of the heat separator to be 100-300 DEG C and the pressure to be 0.02-0.2MPa, discharging a part of heavy components in the mixed aromatic raw material from the bottom of the heat separator, discharging other components from the upper part of the heat separator, feeding into a nonhydrorefining reactor, and contacting and reacting with a nonhydrorefining catalyst, thereby removing olefin from the mixed aromatic raw material. By adopting the method for removing olefin from mixed aromatics, a part of heavy components in a C<8+> mixed aromatic raw material can be effectively removed, and the operation period of the nonhydrorefining olefin removal catalyst can be remarkably prolonged.

Description

technical field [0001] The invention relates to a method for removing olefins in mixed aromatic hydrocarbons. Background technique [0002] Catalytic reforming oil and pyrolysis gasoline are rich in aromatics and contain a small amount of olefins. Olefins are active in nature, easy to polymerize to form colloids and react with other components to form non-ideal components, which not only seriously affects the quality of aromatic products, but also affects the performance of downstream equipment, adsorbents and catalysts. Therefore, in the aromatics complex, in order to obtain qualified chemical products and ensure the smooth progress of subsequent processes, reforming, aromatics extraction, isomerization and toluene disproportionation units are equipped with refining processes to remove olefin impurities. [0003] The refining process of reforming oil or mixed aromatics can be roughly divided into two technical routes, namely hydrofining and non-hydrofining. The hydrofinin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G53/02C10G53/00
CPCC10G53/00C10G53/02C10G2300/1088C10G2300/1096
Inventor 任坚强臧高山王杰广赵燕京马冲
Owner CHINA PETROLEUM & CHEM CORP