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Method for heavy benzene hydrogenation to produce clean fuel oil

A technology for fuel oil and heavy benzene, which is used in hydrotreating process, petroleum industry, treatment of hydrocarbon oil, etc., can solve the problems of large temperature rise in the hydrorefining reaction zone, prolong the operation period of the device, avoid temperature rise, The effect of saving equipment investment

Active Publication Date: 2014-05-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • 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 hydrogenation refining reaction zone, which is beneficial to the safe and stable operation of the device and the extension of the operation period of the device

Method used

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  • Method for heavy benzene hydrogenation to produce clean fuel oil

Examples

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Embodiment 1～3

[0032] The properties of heavy benzene raw materials used are shown in Table 1. The specific technological process of embodiment sees figure 1 , Embodiment 1~3 technological conditions and result are listed in Table 2.

Embodiment 1

[0033] In Examples 1 to 3, the pre-hydrofining reaction zone is filled with hydrofining catalyst FHRS-1. In Examples 1 and 3, the main hydrogenation reaction zone is filled with hydrogenation protection catalyst FZC-103 and Hydrofining catalyst 3936, the loading volume ratio of the two catalysts is 1:7, in Example 2, the main hydrogenation reaction zone is filled with hydrogenation protection catalyst FZC-103 and hydrofinishing catalyst FF-26 from top to bottom, The loading volume ratio of the two catalysts is 1:5.

[0034] In Examples 1-3, after the hydrofinishing oil is subjected to gas-liquid separation, the separated liquid phase product is partially recycled to the main hydrofinishing reaction zone, and partly recycled to the pre-hydrofining reaction zone. Wherein, the weight ratio of the hydrofinishing oil produced by recycling back to the main hydrogenation reaction zone and the pre-hydrofining liquid phase product is 2.0 in Example 1 and Example 2, and 3.0 in Example 3...

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Abstract

The invention discloses a method for heavy benzene hydrogenation to produce clean fuel oil. 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, subjecting the reaction effluent to gas-liquid separation, bringing the liquid phase product into a main hydrogenation reaction area, carrying out hydrogenation reaction by means of a hydrogenation protective reaction area and a main hydrofining reaction area, subjecting the oil generated by hydrofining to gas-liquid separation, cycling part of the separated liquid phase product back to the main hydrogenation reaction area, and separating the rest part of liquid phase product to obtain gasoline and diesel oil respectively. The method provided by the invention can greatly reduce the temperature rise in the pre-hydrofining reaction area, avoids the need to set a plurality of reactors or many catalyst beds due to great 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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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/02
Inventor 许杰关明华张忠清姚春雷
Owner CHINA PETROLEUM & CHEM CORP