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Hydrofining method for heavy benzene

A technology for hydrofining and heavy benzene, which is applied in hydrotreating process, petroleum industry, hydrocarbon oil treatment, etc. It can solve the problem of high temperature rise in the pre-hydrofining reaction zone, and achieve stable and safe operation and save equipment The effect of investment and extended operation cycle

Active Publication Date: 2014-05-14
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention can not only produce clean gasoline and diesel products through hydrogenation reaction of heavy benzene, but also can effectively solve the problem of large temperature rise in the pre-hydrogenation refining reaction zone, which is beneficial to the safe and stable operation of the device and the extension of the operating cycle of the device

Method used

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  • Hydrofining method for heavy benzene

Examples

Experimental program
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Effect test

Embodiment 1～3

[0030] The properties of the heavy benzene raw materials used are shown in Table 1, and the specific process flow is shown in figure 1 .

Embodiment 1

[0031] In Example 1 and Example 3, the pre-hydrofinishing reaction zone is filled with hydrofinishing catalyst FF-26, and the main hydrogenation reaction zone is filled with hydrogenation protection catalyst FZC-103 and hydrofinishing catalyst 3936 in sequence from top to bottom. The loading volume ratio of the catalyst is 1:7; in Example 2, the pre-hydrofinishing reaction zone is filled with hydrofinishing catalyst 3936, and the main hydrogenation reaction zone is sequentially filled with hydrogenation protection catalyst FZC-103 and hydrogenation catalyst FZC-103 from top to bottom. Refining catalyst FF-26, the loading volume ratio of the two catalysts is 1:5.

[0032] In Examples 1-3, after the gas-liquid separation of the pre-hydrofining oil, the separated liquid phase product is recycled to the pre-hydrofining reaction zone to be mixed with heavy benzene as the raw material. The circulation weight ratio of the pre-hydrofining oil to heavy benzene in Examples 1 and 2 is 2....

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Abstract

The invention discloses a hydrofining method for heavy benzene. The method includes: filtering the raw material heavy benzene and mixing the filtered heavy benzene with hydrogen, leading the mixture into a pre-hydrofining reaction area to undergo reaction, subjecting the reaction effluent to gas-liquid separation, cycling part of the liquid phase product back to the pre-hydrofining reaction area, heating the rest part of the liquid phase product and making it enter a main hydrogenation reaction area, carrying out hydrogenation reaction through a hydrogenation protective reaction area and a main hydrofining reaction area, and separating the hydrofining product to obtain gasoline and diesel. The method provided by the invention can greatly reduce the temperature rise in the pre-hydrofining reaction area, avoids the need to setting a plurality of reactors or many catalyst beds due to high temperature rise, prolongs the equipment operation cycle, reduces the load of a circulating hydrogen compressor, and saves the equipment investment, thus providing a processing method able to improve the economical efficiency of heavy benzene with low added value. The method not only develops new application of the raw material, but also expands the raw material sources of clean fuel oil.

Description

technical field [0001] The invention relates to a hydrogenation method for heavy benzene, in particular to a two-stage hydrogenation method for producing clean fuel oil. Background technique [0002] The increasing scarcity of the world's petroleum resources has made the technology of processing and producing clean fuel oil from various unconventional petroleum resources a hot spot. One of the technologies is to produce clean fuel oil using coal chemical by-products as raw materials. [0003] Heavy benzene is a by-product produced during the crude benzene hydrogenation refining process in the coal chemical industry. In the crude benzene hydrogenation process, the raw material crude benzene is separated in a multi-stage evaporator, and high boiling point components such as trimethylbenzene, naphthalene, and indene Man, coumarone, etc. are discharged from the bottom of the multi-stage evaporator as residual oil, and this part of residual oil is heavy benzene. [0004] The pro...

Claims

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Application Information

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IPC IPC(8): C10G67/02
Inventor 许杰关明华张忠清姚春雷
Owner CHINA PETROLEUM & CHEM CORP
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